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Artículos de revistas sobre el tema "Tomatoes Tomatoes Lettuce Lettuce"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 18 de febrero de 2022

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1

GUPTA, S. K., K. NALLUSWAMI, C. SNIDER, et al. "Outbreak ofSalmonellaBraenderup infections associated with Roma tomatoes, northeastern United States, 2004: a useful method for subtyping exposures in field investigations." Epidemiology and Infection 135, no. 7 (2007): 1165–73. http://dx.doi.org/10.1017/s0950268807007911.

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SUMMARYSalmonellaBraenderup is an uncommon serotype in the United States. In July 2004, a multistate outbreak ofSalmonellaBraenderup diarrhoeal infections occurred, with 125 clinical isolates identified. To investigate, we conducted a case-control study, enrolling 32 cases and 63 matched controls. Cheese, lettuce and tomato eaten at restaurants all appeared to be associated with illness. To further define specific exposures, we conducted a second study and asked managers of restaurants patronized by patients and controls about cheese, lettuce and tomato varieties used in dishes their patrons r

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2

Hertrich, Sarah M., Glenn Boyd, Joseph Sites, and Brendan A. Niemira. "Cold Plasma Inactivation of Salmonella in Prepackaged, Mixed Salads Is Influenced by Cross-Contamination Sequence." Journal of Food Protection 80, no. 12 (2017): 2132–36. http://dx.doi.org/10.4315/0362-028x.jfp-17-242.

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ABSTRACT Customer demand for convenient food products has led to an increased production of prepackaged and ready-to-eat food products. Most of these products rely mainly on surface disinfection and other traditional approaches to ensure shelf life and safety. Novel processing techniques, such as cold plasma, are currently being investigated to enhance the safety and shelf life of prepacked foods. The purpose of this study was to determine the effects of cold plasma corona discharge on the inactivation of Salmonella on prepackaged, tomato-and-lettuce mixed salads. Two different inoculation met

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3

ARTHUR, LINDSAY, SANDRA JONES, MARTHA FABRI, and JOSEPH ODUMERU. "Microbial Survey of Selected Ontario-Grown Fresh Fruits and Vegetables." Journal of Food Protection 70, no. 12 (2007): 2864–67. http://dx.doi.org/10.4315/0362-028x-70.12.2864.

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Recent produce-related outbreaks have been receiving heightened media coverage, which has increased public concern toward the safety of fresh fruits and vegetables. In response, the microbial contamination of Ontario-grown fresh fruits and vegetables was evaluated by the Ontario Ministry of Agriculture, Food and Rural Affairs during the summer of 2004. Prior to this survey, information specific to the microbial contamination of Ontario-produced fruits and vegetables was limited. This nonregulatory survey had two objectives: (i) to obtain a general microbiological profile of selected fruits and

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4

KILONZO-NTHENGE, AGNES, FUR-CHI CHEN, and SANDRIA L. GODWIN. "Efficacy of Home Washing Methods in Controlling Surface Microbial Contamination on Fresh Produce." Journal of Food Protection 69, no. 2 (2006): 330–34. http://dx.doi.org/10.4315/0362-028x-69.2.330.

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Much effort has been focused on sanitation of fresh produce at the commercial level; however, few options are available to the consumer. The purpose of this study was to determine the efficacy of different cleaning methods in reducing bacterial contamination on fresh produce in a home setting. Lettuce, broccoli, apples, and tomatoes were inoculated with Listeria innocua and then subjected to combinations of the following cleaning procedures: (i) soak for 2 min in tap water, Veggie Wash solution, 5% vinegar solution, or 13% lemon solution and (ii) rinse under running tap water, rinse and rub un

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5

Obermeier, C., J. L. Sears, H. Y. Liu, et al. "Characterization of Distinct Tombusviruses that Cause Diseases of Lettuce and Tomato in the Western United States." Phytopathology® 91, no. 8 (2001): 797–806. http://dx.doi.org/10.1094/phyto.2001.91.8.797.

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A soilborne disease of lettuce, associated with necrosis and dieback, has been found with increasing frequency in California and Arizona over the last 10 years. An isometric virus, serologically related to Tomato bushy stunt virus (TBSV), was consistently isolated from lettuce plants with these disease symptoms. Back-inoculation to healthy lettuce plants and subsequent reisolation of the virus from symptomatic lettuce leaves suggested that this virus was the causal agent of this disease. A tombusvirus was also associated with a necrosis disease of greenhouse-grown tomatoes in Colorado and New

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6

SY, KAYE V., MELINDA B. MURRAY, M. DAVID HARRISON, and LARRY R. BEUCHAT. "Evaluation of Gaseous Chlorine Dioxide as a Sanitizer for Killing Salmonella, Escherichia coli O157:H7, Listeria monocytogenes, and Yeasts and Molds on Fresh and Fresh-Cut Produce." Journal of Food Protection 68, no. 6 (2005): 1176–87. http://dx.doi.org/10.4315/0362-028x-68.6.1176.

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Gaseous chlorine dioxide (ClO2) was evaluated for effectiveness in killing Salmonella, Escherichia coli O157:H7, and Listeria monocytogenes on fresh-cut lettuce, cabbage, and carrot and Salmonella, yeasts, and molds on apples, peaches, tomatoes, and onions. Inoculum (100 μl, ca. 6.8 log CFU) containing five serotypes of Salmonella enterica, five strains of E. coli O157:H7, or five strains of L. monocytogenes was deposited on the skin and cut surfaces of fresh-cut vegetables, dried for 30 min at 22°C, held for 20 h at 4°C, and then incubated for 30 min at 22°C before treatment. The skin surface

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7

McBride, M. B. "Arsenic and Lead Uptake by Vegetable Crops Grown on Historically Contaminated Orchard Soils." Applied and Environmental Soil Science 2013 (2013): 1–8. http://dx.doi.org/10.1155/2013/283472.

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Transfer of Pb and As into vegetables grown on orchard soils historically contaminated by Pb arsenate pesticides was measured in the greenhouse. Lettuce, carrots, green beans, and tomatoes were grown on soils containing a range of total Pb (16.5–915 mg/kg) and As (6.9–211 mg/kg) concentrations. The vegetables were acid-digested and analyzed for total Pb and As using ICP-mass spectrometry. Vegetable contamination was dependent on soil total Pb and As concentrations, pH, and vegetable species. Arsenic concentrations were the highest in lettuce and green beans, lower in carrots, and much lower in

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8

ALBRECHT, JULIE A., FAYRENE L. HAMOUZ, SUSAN S. SUMNER, and VANESSA MELCH. "Microbial Evaluation of Vegetable Ingredients in Salad Bars†." Journal of Food Protection 58, no. 6 (1995): 683–85. http://dx.doi.org/10.4315/0362-028x-58.6.683.

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Vegetable salad ingredients (lettuce, tomatoes, broccoli, and cauliflower) purchased from three grocery-store deli operations were analyzed for total plate count, coliforms, yeasts, and molds. The temperature of the vegetable ingredients was measured at the time of purchase and the pH was measured on all samples within one-half hour after purchase. In the second phase, fresh broccoli was processed into florets, inoculated with E. coli ATCC 23742, and subjected to three washing treatments. The temperature of the salad ingredients ranged from 5.1°C to 18.9°C. The pH ranges for the vegetables wer

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9

Abou-Jawdah, Y., C. El Mohtar, H. Sobh, and M. K. Nakhla. "First Report of Tomato spotted wilt virus on Tomatoes in Lebanon." Plant Disease 90, no. 3 (2006): 376. http://dx.doi.org/10.1094/pd-90-0376a.

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During the spring and summer of 2004, an epidemic of Tomato spotted wilt virus (TSWV) (genus Tospovirus, family Bunyaviridae) was observed in an isolated tomato field at an elevation of 1,000 m in Lebanon. Symptoms were characteristic of TSWV (2). Seedlings came from a nursery in the coastal area of Byblos. In the spring of 2005, TSWV-like symptoms (2) appeared on tomato in the same mountainous area, as well as on tomato, pepper, and lettuce crops in the Byblos coastal area. Initial diagnosis using TSWV ImmunoStrip Tests (Agdia, IN) gave positive results on tomato and lettuce samples. When the

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10

Poulik, Zdenek. "Influence of nickel contaminated soils on lettuce and tomatoes." Scientia Horticulturae 81, no. 3 (1999): 243–50. http://dx.doi.org/10.1016/s0304-4238(99)00023-0.

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11

HESHMATI, ALI, FERESHTEH MEHRI, JAVAD KARAMI-MOMTAZ, and AMIN MOUSAVI KHANEGHAH. "Concentration and Risk Assessment of Potentially Toxic Elements, Lead and Cadmium, in Vegetables and Cereals Consumed in Western Iran." Journal of Food Protection 83, no. 1 (2019): 101–7. http://dx.doi.org/10.4315/0362-028x.jfp-19-312.

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ABSTRACT The concentration of cadmium (Cd) and lead (Pb) in vegetable (potatoes, onions, tomatoes, lettuce, leeks, and carrots) and cereal (wheat and rice) samples collected from Iran were investigated by a graphite furnace atomic absorption spectrophotometer. In addition, we determined the health risks due to exposure to Cd and Pb through vegetable and cereal consumption by computing the estimated daily intake, the target hazard quotient (THQ), the total THQ, and the margin of exposure. The mean concentrations of Pb in potato, onion, tomato, lettuce, leek, carrot, wheat, and rice samples were

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12

CAI, SHIYU, RANDY W. WOROBO, and ABIGAIL B. SNYDER. "Combined Effect of Storage Condition, Surface Integrity, and Length of Shelf Life on the Growth of Listeria monocytogenes and Spoilage Microbiota on Refrigerated Ready-to-Eat Products." Journal of Food Protection 82, no. 8 (2019): 1423–32. http://dx.doi.org/10.4315/0362-028x.jfp-18-576.

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ABSTRACT Psychrotolerant growth of Listeria monocytogenes in ready-to-eat (RTE) foods increases the risk to food safety, particularly when spoilage does not occur prior to L. monocytogenes growth of &gt;1 log CFU/g. The purpose of this study was to evaluate the relative rates of quality deterioration and L. monocytogenes growth in six product systems (tomatoes, apples, fresh-cut cantaloupe, fresh-cut lettuce, baby spinach, and commercially processed turkey slices) under various conditions of refrigeration temperatures, atmospheres, and quality. Cantaloupe and spinach leaves supported &

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13

Gyawali, Rabin, Salam A. Ibrahim, Salma H. Abu Hasfa, Shahnaz Q. Smqadri, and Yosef Haik. "Antimicrobial Activity of Copper Alone and in Combination with Lactic Acid againstEscherichia coliO157:H7 in Laboratory Medium and on the Surface of Lettuce and Tomatoes." Journal of Pathogens 2011 (2011): 1–9. http://dx.doi.org/10.4061/2011/650968.

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The objective of this study was to evaluate the effect of copper alone and in combination with lactic acid againstE. coliO157:H7 in laboratory medium and on the surface of lettuce and tomatoes. Four strains ofE. coliO157:H7 were individually inoculated into BHI broth containing different concentrations of copper (5, 10, 20, and 40 ppm, w/v), lactic acid (0.1 and 0.2%, v/v), and their combinations. After incubation, aliquots of 1 mL from each sample were withdrawn and plated on BHI agar to determine the bacterial population. Significant growth inhibition (P<0.05) was observed with a combinat

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14

Sawyer, Leon D. "The Luke et al. Method for Determining Multipesticide Residues in Fruits and Vegetables: Collaborative Study." Journal of AOAC INTERNATIONAL 68, no. 1 (1985): 64–71. http://dx.doi.org/10.1093/jaoac/68.1.64.

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Abstract Ten laboratories analyzed unfortified and fortified samples of lettuce, tomatoes, and strawberries for organochlorine and organophosphorus pesticides by applicable portions of the comprehensive multipesticide method of Luke et al. The 3 crops were fortified with 6 pesticides, a-BHC, dieldrin, chlorpyrifos, acephate, omethoate, and monocrotophos, each at 3 levels per crop. Included in the 54 fortifications were 16 pairs of blind duplicates: same pesticide, crop, and level. Recoveries were calculated by area comparisons with known reference materials, using the responses obtained from 2

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15

MOTA, ALAIN, KRISTINA D. MENA, MARCELA SOTO-BELTRAN, PATRICK M. TARWATER, and CRISTÓBAL CHÁIDEZ. "Risk Assessment of Cryptosporidium and Giardia in Water Irrigating Fresh Produce in Mexico." Journal of Food Protection 72, no. 10 (2009): 2184–88. http://dx.doi.org/10.4315/0362-028x-72.10.2184.

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A rise in foodborne outbreaks in the United States associated with fresh produce has resulted in increased concerns with the importation of fruits and vegetables. Mexico is a major exporter of produce to the United States, particularly tomatoes and bell peppers. A quantitative microbial risk assessment (QMRA) was conducted to evaluate the public health impact of protozoan-laden water irrigating produce in Culiacan, Sinaloa, Mexico. Specifically, a QMRA was conducted to address the human health impact associated with consumption of tomatoes, bell peppers, cucumbers, and lettuce irrigated with w

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16

Frantz, Jonathan M., and Bruce Bugbee. "Acclimation of Plant Populations to Shade: Photosynthesis, Respiration, and Carbon Use Efficiency." Journal of the American Society for Horticultural Science 130, no. 6 (2005): 918–27. http://dx.doi.org/10.21273/jashs.130.6.918.

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Cloudy days cause an abrupt reduction in daily photosynthetic photon flux (PPF), but we have a poor understanding of how plants acclimate to this change. We used a unique 10-chamber, steady-state, gas-exchange system to continuously measure daily photosynthesis and night respiration of populations of a starch accumulator [tomato (Lycopersicon esculentum Mill. cv. Micro-Tina)] and a sucrose accumulator [lettuce (Lactuca sativa L. cv. Grand Rapids)] over 42 days. All measurements were done at elevated CO2 (1200 μmol·mol-1) to avoid any CO2 limitations and included both shoots and roots. We integ

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17

Cranston, Peter S. "A non-biting midge (Diptera: Chironomidae) of horticultural significance." Bulletin of Entomological Research 77, no. 4 (1987): 661–67. http://dx.doi.org/10.1017/s0007485300012177.

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AbstractSporadic previous reports of chironomid larvae feeding on roots of horticultural plants are reviewed and related to the growing recognition that a particular parthenogenetic species can damage severely indoor horticultural crops, particularly lettuce and young tomatoes. The taxonomy of the pest, Bryophaenocladius furcatus (Kieffer), is assessed, new synonymy proposed and a neotype and lectotype designated. The species is redescribed from the larva, pupa and adult female.

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18

BOHAYCHUK, V. M., R. W. BRADBURY, R. DIMOCK, et al. "A Microbiological Survey of Selected Alberta-Grown Fresh Produce from Farmers' Markets in Alberta, Canada." Journal of Food Protection 72, no. 2 (2009): 415–20. http://dx.doi.org/10.4315/0362-028x-72.2.415.

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Previously there was no available information on the levels of indicator bacteria and the prevalence of pathogens in fresh produce grown in Alberta, Canada. Baseline information on the occurrence and levels of Escherichia coli and the prevalence of foodborne pathogens in selected produce items available to consumers from farmers' and public markets in two large urban centers and surrounding areas in Alberta was obtained. A total of 10 large markets with between 1 and 12 produce vendors and 26 small markets with between 1 and 6 produce vendors were sampled from 21 June to 7 October 2007. Lettuc

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PANGLOLI, PHILIPUS, YEN-CON HUNG, LARRY R. BEUCHAT, C. HAROLD KING, and ZHI-HUI ZHAO. "Reduction of Escherichia coli O157:H7 on Produce by Use of Electrolyzed Water under Simulated Food Service Operation Conditions." Journal of Food Protection 72, no. 9 (2009): 1854–61. http://dx.doi.org/10.4315/0362-028x-72.9.1854.

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Treatment of fresh fruits and vegetables with electrolyzed water (EW) has been shown to kill or reduce foodborne pathogens. We evaluated the efficacy of EW in killing Escherichia coli O157:H7 on iceberg lettuce, cabbage, lemons, and tomatoes by using washing and/or chilling treatments simulating those followed in some food service kitchens. Greatest reduction levels on lettuce were achieved by sequentially washing with 14-A (amperage) acidic EW (AcEW) for 15 or 30 s followed by chilling in 16-A AcEW for 15 min. This procedure reduced the pathogen by 2.8 and 3.0 log CFU per leaf, respectively,

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Kouřimská, Lenka, Kristýna Václavíková, Luboš Babička, et al. "The effect of fermented pig slurry fertilization on the quality of vegetables." Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis 56, no. 1 (2008): 251–58. http://dx.doi.org/10.11118/actaun200856010251.

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Fermented pig slurry as a fermentation residue of biogas plants was used for vegetables fertilization as a replacement of industrial mineral fertilizers. Tomatoes were grown in vessels, celery and spinach in the field, radish and lettuce in the greenhouse. Besides dry matter content determination vegetables were evaluated from the food quality point of view. Is consists of microbiological assessment, nitrates and selected elements (Pb, Cd, As, Zn and Hg) content determination.

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Lucarini, Massimo, Sabina Lanzi, Laura D’Evoli, Altero Aguzzi, and Ginevra Lombardi-Boccia. "Intake of Vitamin A and Carotenoids from the Italian Population – Results of an Italian Total Diet Study." International Journal for Vitamin and Nutrition Research 76, no. 3 (2006): 103–9. http://dx.doi.org/10.1024/0300-9831.76.3.103.

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The present study focused on vitamin A and carotenoids (α-and β-carotene, lutein and zeaxanthin, β-cryptoxanthin, lycopene) daily intake from the Italian total diet. The input of some food groups (cereals, vegetables, fruits, milk and dairy, meat and meat products, fish) most responsible for major and minor contributions to the daily intake of these molecules was evaluated. Furthermore the contribution to the dietary intake of β-carotene and lutein of the most consumed vegetables in the market basket of the Italian total diet (beets, brassica vegetables, carrots, chicory, courgette (zucchini),

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22

RAIDEN, RENEE M., SUSAN S. SUMNER, JOSEPH D. EIFERT, and MERLE D. PIERSON. "Efficacy of Detergents in Removing Salmonella and Shigella spp. from the Surface of Fresh Produce." Journal of Food Protection 66, no. 12 (2003): 2210–15. http://dx.doi.org/10.4315/0362-028x-66.12.2210.

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Fresh produce has been implicated in several foodborne disease outbreaks. Produce surfaces can be primary sites of contamination during production and handling. One approach to reduce contamination is to treat fresh produce with rinsing agents. In this study, different detergent agents were used at 22 and 40°C to determine their efficacy in removing Salmonella and Shigella spp. from the surfaces of strawberries, tomatoes, and green-leaf lettuce. Produce was inoculated at 22°C with a cocktail of nalidixic acid–resistant organisms (6 to 6.5 log CFU/ml). After air drying for 1 h, samples were rin

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23

PARTYKA, MELISSA L., RONALD F. BOND, JEFF FARRAR, et al. "Quantifying the Sensitivity of Scent Detection Dogs To Identify Fecal Contamination on Raw Produce." Journal of Food Protection 77, no. 1 (2014): 6–14. http://dx.doi.org/10.4315/0362-028x.jfp-13-249.

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Consumption of raw produce commodities has been associated with foodborne outbreaks in the United States. In a recent Centers for Disease Control and Prevention report outlining the incidence of food-related outbreaks from 1998 to 2008, produce of all kinds were implicated in 46% of illnesses and 23% of deaths. Methods that quickly identify fecal contamination of foods, including produce, will allow prioritization of samples for testing during investigations and perhaps decrease the time required to identify specific brands or lots. We conducted a series of trials to characterize the sensitivi

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Pajovic, I., S. Širca, B. Geric Stare, and G. Urek. "The Incidence of Root-Knot Nematodes Meloidogyne arenaria, M. incognita, and M. javanica on Vegetables and Weeds in Montenegro." Plant Disease 91, no. 11 (2007): 1514. http://dx.doi.org/10.1094/pdis-91-11-1514b.

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Root-knot nematodes (Meloidogyne spp.) are common pathogens that parasitize vegetables and other crops and cause significant yield reductions worldwide. In the early spring of 2006, severe plant stunting, chlorosis, and extensive root galling were observed on cucumber plants grown in a greenhouse on Zeta plain, Zetska ravnica, Montenegro. In the summer and autumn of 2006, infected roots of different crops were collected from greenhouses and vegetable production fields of Zeta plain, which represents the largest area of Montenegro's vegetable production. Several vegetable crops were found to be

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SONG, YUANYUAN, and XUETONG FAN. "Hydrogen Peroxide Residue on Tomato, Apple, Cantaloupe, and Romaine Lettuce after Treatments with Cold Plasma–Activated Hydrogen Peroxide Aerosols." Journal of Food Protection 84, no. 8 (2021): 1304–8. http://dx.doi.org/10.4315/jfp-21-051.

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ABSTRACT Hydrogen peroxide (H2O2) has long been studied as an aqueous sanitizer to enhance microbial safety of fresh produce. Recently, we demonstrated that cold plasma–activated H2O2 aerosols, hereafter called ionized hydrogen peroxide (iHP), reduced populations of Salmonella, Listeria, and Escherichia coli by up to 5.5 log on surfaces of various produce items. However, the amount and fate of H2O2 residue left on fresh produce after treatments have not been evaluated. In the present study, H2O2 residue levels on apples, tomatoes, cantaloupe, and romaine lettuce were analyzed after treatments

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GORSKI, LISA, and ANITA S. LIANG. "Effect of Enrichment Medium on Real-Time Detection of Salmonella enterica from Lettuce and Tomato Enrichment Cultures." Journal of Food Protection 73, no. 6 (2010): 1047–56. http://dx.doi.org/10.4315/0362-028x-73.6.1047.

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Three enrichment broths commonly used for detection of Salmonella (buffered peptone water [BPW], tryptic soy broth [TSB], and universal preenrichment broth [UPB]) were compared for use in real-time SYBR Green PCR detection of Salmonella introduced into enrichment cultures made from store-bought lettuce and tomatoes. The produce served as a source of normal plant microbiota to measure how well DNA-based detection methods for Salmonella work in a suspension of plant-associated bacteria that may be closely related to Salmonella. A qualitative assessment of the background microbiota that grew in t

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Miller, Nathan D., P. M. Davidson, and Doris H. D’Souza. "Real-time reverse-transcriptase PCR for Salmonella Typhimurium detection from lettuce and tomatoes." LWT - Food Science and Technology 44, no. 4 (2011): 1088–97. http://dx.doi.org/10.1016/j.lwt.2010.08.003.

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Crozier, Alan, Michael E. J. Lean, Morag S. McDonald, and Christine Black. "Quantitative Analysis of the Flavonoid Content of Commercial Tomatoes, Onions, Lettuce, and Celery." Journal of Agricultural and Food Chemistry 45, no. 3 (1997): 590–95. http://dx.doi.org/10.1021/jf960339y.

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FARBER, J. M., G. W. SANDERS, and M. A. JOHNSTON. "A Survey of Various Foods for the Presence of Listeria Species." Journal of Food Protection 52, no. 7 (1989): 456–58. http://dx.doi.org/10.4315/0362-028x-52.7.456.

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Various retail foods were analyzed for the presence of Listeria spp. One hundred ten samples of vegetables including lettuce, celery, tomatoes, and radishes, and 14 samples of pasteurized milk, were found to be free of L. monocytogenes. In contrast 9 of 16 (56.3%) chicken legs, 38 of 44 (86.4%) ground meats, and 6 of 30 (20%) fermented sausages contained the organism. Of 530 samples of ice cream products obtained at the manufacturing level, only 2 were positive for L. monocytogenes.

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LIN, CHIA-MIN, JEONGMOK KIM, WEN-XIAN DU, and CHENG-I. WEI. "Bactericidal Activity of Isothiocyanate against Pathogens on Fresh Produce†." Journal of Food Protection 63, no. 1 (2000): 25–30. http://dx.doi.org/10.4315/0362-028x-63.1.25.

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The bactericidal activity of allyl and methyl isothiocyanate (AITC and MITC) was tested with a rifampicin-resistant strain of Salmonella Montevideo and streptomycin-resistant strains of Escherichia coli O157:H7 and Listeria monocytogenes Scott A. Iceberg lettuce inoculated with high (107 to 108 CFU/g) and low (103 to 104 CFU/g) concentrations of bacterial pathogens was treated with AITC and MITC in sealed containers at 4°C for 4 days. AITC showed stronger bactericidal activity than MITC against E. coli O157:H7 and Salmonella Montevideo, whereas MITC showed stronger activity against L. monocyto

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Dari, Linda, Ahmad ADDO, and Komla Agbeko DZISI. "Determination of Pesticide Residuals in Soil and Tomato Fruits from Two Tomato Production Areas in northern Ghana." Ghana Journal of Science, Technology and Development 6, no. 2 (2020): 37–44. http://dx.doi.org/10.47881/167.967x.

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Tomato fruit (Lycopersicon esculentum Mill) is an important vegetable commodity in Ghana, as it is consumed daily in many households either heat-treated or without any form of heat treatments. Tomato production is a major source of income for many smallholder producers in Northern Ghana especially through dry season farming when the major supply of tomatoes from Southern Ghana is exhausted. Research conducted for the past decade confirmed the presence of pesticide residues in fruits and vegetables such as cabbage, onion, cucumber, lettuce, tomatoes, okra and pepper. The objective of this study

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Suleiman, F., A. A. Nuhu, K. I. Omoniyi, and Z. I. Yashim. "DETERMINATION OF ORGANOCHLORINE PESTICIDE RESIDUES IN SOME VEGETABLES AND FRUIT BY QuEChERS TECHNIQUES AND GAS CHROMATOGRAPHY /MASS SPECTROMETRY." FUDMA JOURNAL OF SCIENCES 4, no. 2 (2020): 365–70. http://dx.doi.org/10.33003/fjs-2020-0402-223.

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The concentrations of organochlorine pesticide residues were analysed in some vegetables and fruit (spinach, lettuce, cabbage, tomatoes, carrots and onions) grown at Dagachi farming areas along River Galma of Zaria in Kaduna State, Nigeria. Sample collection and preparation were carried out using standard procedures. The concentrations of all the pesticides in the fruits and vegetables samples were analysed using quick easy cheap effective rugged and safe (QuEChERS) multi- residue extraction and clean up techniques, followed by gas chromatography – mass spectrometry (GC – MS). The most commonl

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MUKHERJEE, AVIK, DORINDA SPEH, ELIZABETH DYCK, and FRANCISCO DIEZ-GONZALEZ. "Preharvest Evaluation of Coliforms, Escherichia coli, Salmonella, and Escherichia coli O157:H7 in Organic and Conventional Produce Grown by Minnesota Farmers." Journal of Food Protection 67, no. 5 (2004): 894–900. http://dx.doi.org/10.4315/0362-028x-67.5.894.

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Microbiological analyses of fresh fruits and vegetables produced by organic and conventional farmers in Minnesota were conducted to determine the coliform count and the prevalence of Escherichia coli, Salmonella, and E. coli O157:H7. A total of 476 and 129 produce samples were collected from 32 organic and 8 conventional farms, respectively. The samples included tomatoes, leafy greens, lettuce, green peppers, cabbage, cucumbers, broccoli, strawberries, apples, and seven other types of produce. The numbers of fruits and vegetables was influenced by their availability at participating farms and

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Stegarus, Diana Ionela, Roxana Elena Ionete, Ecaterina Lengyel, and Marius Gheorghe Miricioi. "Advanced Identification and Quantification of Pesticide Residues in Vegetables by GC-ToFMS Technique." Revista de Chimie 71, no. 4 (2020): 220–29. http://dx.doi.org/10.37358/rc.20.4.8060.

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The identification and quantification of a large range of pesticide residues (e.g. fungicides, insecticides, acaricides) in vegetables from Romania markets, in Maramures, Alba Iulia and Botosani region, was performed by gas-chromatography coupled with time-of-flight mass spectrometry (GC-ToFMS) to better assess the impact of agricultural practices that may result from `accidental` application of higher doses of treatment solutions. The ion chromatograms obtained by GC-ToFMS enabled us to easily quantify at ppb level and to record the entire spectrum at high speeds (up to 500 spectra/second) wi

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GUO, SHUANGHUAN, RUNZE HUANG, and HAIQIANG CHEN. "Evaluating a Combined Method of UV and Washing for Sanitizing Blueberries, Tomatoes, Strawberries, Baby Spinach, and Lettuce." Journal of Food Protection 82, no. 11 (2019): 1879–89. http://dx.doi.org/10.4315/0362-028x.jfp-18-524.

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ABSTRACT We assessed a fresh produce decontamination system using a combined method of UV and washing (water-assisted UV [WUV]) in different scales. The system used tap water to wash fresh produce while exposing it to UV light. First, the reduction of Salmonella in tap water under UV treatment (1 to 1,740 mJ/cm2) was determined. Increasing the UV dose significantly (P &lt; 0.05) increased the Salmonella reduction in wash water, and UV intensity of more than 2 mW/cm2 could reduce Salmonella in tap water to below 1 CFU/mL given enough processing time (more than 1 min; UV dose of 120 mJ/cm2).

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KIM, SE-RI, YOHAN YOON, WON-IL KIM, et al. "Comparison of Sample Preparation Methods for the Recovery of Foodborne Pathogens from Fresh Produce." Journal of Food Protection 75, no. 7 (2012): 1213–18. http://dx.doi.org/10.4315/0362-028x.jfp-11-420.

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Sample preparation methods (pummeling, pulsifying, sonication, and shaking by hand) were compared for achieving maximum recovery of foodborne pathogens from iceberg lettuce, perilla leaves, cucumber, green pepper, and cherry tomato. Antimicrobial and dehydration effects also were examined to investigate causes of poor recovery of pathogens. Each produce type was inoculated with Escherichia coli O157:H7, Salmonella Typhimurium, Listeria monocytogenes, Staphylococcus aureus, and Bacillus cereus at 6.0 log CFU/cm2, and samples were prepared using the four methods. Bacterial populations recovered

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Stirzaker, RJ, BG Sutton, and N. Collis-George. "Soil management for irrigated vegetable production. I. The growth of processing tomatoes following soil preparation by cultivation, zero-tillage and an in situ-grown mulch." Australian Journal of Agricultural Research 44, no. 4 (1993): 817. http://dx.doi.org/10.1071/ar9930817.

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A sequence of lettuce and tomato crops was grown in a field experiment on a sandy loam soil in order to study the relationship between soil tillage and plant growth under the near optimal water and nutrient conditions which are characteristic of vegetable production. This paper describes the performance of processing tomato crops, grown over two seasons under a range of soil management systems. The soil management systems included a cultivated and a zero-tillage treatment, as well as a zero-tillage treatment which followed a crop of subterranean clover (Trifoliurn subterraneum L.). The subterr

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Kukhtyn, Mykola, Yulia Horiuk, Tetiana Yaroshenko, Svitlana Laiter-Moskaliuk, Viktoria Levytska, and Antonina Reshetnyk. "MONITORING THE CONTENT OF NITRATES IN VEGETABLES AND THE INFLUENCE OF THE PICKLING TECHNOLOGY ON THE DENITRIFICATION PROCESS." EUREKA: Life Sciences 1 (January 30, 2018): 3–10. http://dx.doi.org/10.21303/2504-5695.2018.00528.

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The aim of the work was to determine the concentration of nitrites in vegetable products (tomatoes, cucumbers, white cabbage, table beet, carrot, potatoes, onion and green onion, lettuce, spinach and parsley), realized at markets of the cities Ternopil, Kamianets-Podilskyi and Chernivtsi (Ukraine), to separate the distribution of nitrates in vegetables and also to study the influence of lactic microflora on the nitrate content at pickling tomatoes. It was established, that vegetables with the maximum exceed of maximum permissible concentration (MPC) by the nitrate content up to 1,6 times for p

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Yang, Teng, and Hye-Ji Kim. "Characterizing Nutrient Composition and Concentration in Tomato-, Basil-, and Lettuce-Based Aquaponic and Hydroponic Systems." Water 12, no. 5 (2020): 1259. http://dx.doi.org/10.3390/w12051259.

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Aquaponic nutrient studies often use various types of water containing high levels of mineral nutrients for water supply, making it difficult to accurately determine deficient nutrients limiting crop yield and quality across the systems. To avoid interference with background nutrients, we used reverse osmosis water in this study. The objectives were to identify critical nutrients that affect the yield and quality of cherry tomato-, basil-, and lettuce by characterizing nutrient composition and concentration in aquaponic systems in comparison to hydroponic systems. Daily release rate (mg L−1) o

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BARDELL, D. "Survival of Herpes Simplex Virus Type 1 on Some Common Foods Routinely Touched before Consumption." Journal of Food Protection 60, no. 10 (1997): 1259–61. http://dx.doi.org/10.4315/0362-028x-60.10.1259.

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Droplets of saliva containing herpes simplex virus type 1 were placed on the skin of tomatoes and the upper surface of lettuce leaves. There was no loss of virus infectivity titer at refrigerator temperature (2°C) at any time examined up to 1 h, the longest period tested. At room temperature (22 to 24°C) there was a 2-log drop in titer between 30 and 60 min, but some infectious virus was still present at 1 h. The virus-containing saliva remained in a liquid state at 2°C. At 22 to 24°C the droplets became dry at approximately 50 min. Implications of the findings are discussed.

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Barak, Jeri D., Lara C. Kramer, and Ling-yun Hao. "Colonization of Tomato Plants bySalmonella entericaIs Cultivar Dependent, and Type 1 Trichomes Are Preferred Colonization Sites." Applied and Environmental Microbiology 77, no. 2 (2010): 498–504. http://dx.doi.org/10.1128/aem.01661-10.

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ABSTRACTNontyphoid salmonellosis caused bySalmonella entericais the most common bacterial food-borne illness in humans, and fresh produce, including tomatoes, is a common vehicle. Accumulating data indicate that human enteric pathogenic bacteria, includingS. enterica, interact actively with plants. Tomato plants were inoculated withS. entericato evaluate plausible contamination routes and to determine if the tomato cultivar affectsS. entericacolonization.S. entericapopulation levels on tomato leaves were cultivar dependent.S. entericalevels onSolanum pimpinellifolium(West Virginia 700 [WVa700]

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Camargo Filho, Waldemar P., and Felipe P. Camargo. "A quick review of the production and commercialization of the main vegetables in Brazil and the world from 1970 to 2015." Horticultura Brasileira 35, no. 2 (2017): 160–66. http://dx.doi.org/10.1590/s0102-053620170202.

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ABSTRACT In the biennium 2013-14, the world produced 1,134.27 million tons of vegetables annually. The production of garlic, onion, potato, tomato and watermelon accounted for 66.5% of the total. Brazil, in 2012, considering 40 vegetables, produced around 23 million tons, in 900.0 thousand hectares. Potatoes, tomatoes (table and processing), onions, watermelons, carrots, sweet potatoes, lettuce and cabbage, the main vegetables in Brazil, accounted for 64.0% of the total. This work presents the evolution of production, commercialization, and availability of garlic, onions, potatoes, tomatoes an

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Susan, A. I., E. Sasmita, E. Yulianto, et al. "Ozone application to extend shelf life of vegetables by microbial growth inhibition." MATEC Web of Conferences 197 (2018): 02004. http://dx.doi.org/10.1051/matecconf/201819702004.

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Ozone has been used to extend the shelf life of vegetables by inhibiting the decomposing microbial growth. The study was conducted using six types of vegetables; i.e. broccoli, tomato, mustard, celery, leek, and lettuce; treated and stored using ozonation techniques. The six types of vegetables were divided into two treatment groups, i.e. ozone-washed and not washed, and stored in ozone-filled cold storage at a dose of 15 gr/m3 per day. Total microbial testing was performed to determine the number of microbes in each vegetable sample. In addition, proximate testing was performed to observe the

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TAUXE, R., H. KRUSE, C. HEDBERG, M. POTTER, J. MADDEN, and K. WACHSMUTH. "Microbial Hazards and Emerging Issues Associated with Produce† A Preliminary Report to the National Advisory Committee on Microbiologic Criteria for Foods." Journal of Food Protection 60, no. 11 (1997): 1400–1408. http://dx.doi.org/10.4315/0362-028x-60.11.1400.

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In the past two decades, the consumption of fresh fruits and vegetables in the United States has increased, and the geographic sources and distribution of fresh produce have expanded greatly. Concomitantly, public health officials have documented an increase in the number of reported produce-associated foodborne disease outbreaks in the United States. The Centers for Disease Control and Prevention (CDC) reports that the number of these outbreaks doubled between 1973 and 1987, and 1988 and 1991, and that the number of cases of illness associated with these outbreaks more than doubled. A variety

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BEUCHAT, L. R., B. V. NAIL, B. B. ADLER, and M. R. S. CLAVERO. "Efficacy of Spray Application of Chlorinated Water in Killing Pathogenic Bacteria on Raw Apples, Tomatoes, and Lettuce." Journal of Food Protection 61, no. 10 (1998): 1305–11. http://dx.doi.org/10.4315/0362-028x-61.10.1305.

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Washing whole and cut produce by dipping or submerging in chlorinated water has a sanitizing effect, although reduction in microbial populations is minimal and is usually less than 100-fold. A study was undertaken to evaluate the efficacy of a spray application of chlorine in killing Salmonella, Escherichia coli O157:H7, Listeria monocytogenes, yeasts and molds, and total aerobic mesophilic microorganisms on whole apples, tomatoes, and lettuce leaves. Inoculated produce was treated (sprayed and then soaked) with water (control) or Solutions containing 200 or 2,000 ppm of chlorine for 0, 1,3, 5

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Pieper, Jeffrey R., Rebecca Nelson Brown, and José A. Amador. "Effects of Three Conservation Tillage Strategies on Yields and Soil Health in a Mixed Vegetable Production System." HortScience 50, no. 12 (2015): 1770–76. http://dx.doi.org/10.21273/hortsci.50.12.1770.

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Most vegetable farms in southern New England market directly to consumers and are characterized by high crop diversity and intensive cultivation. Growers rely on tillage to prepare fields for planting and control weeds, but are concerned about the negative effects of tillage on soil health. This study evaluated three tillage reduction strategies in a market garden system producing tomatoes, melons, cucumbers, cabbage, carrots, and lettuce. Treatments of strip tillage into a killed cereal rye (Secale cereale) cover crop mulch, perennial white clover (Trifolium repens), and ryegrass (Lolium pere

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YILMAZ, AYSUN, KAMIL BOSTAN, EDA ALTAN, et al. "Investigations on the Frequency of Norovirus Contamination of Ready-to-Eat Food Items in Istanbul, Turkey, by Using Real-Time Reverse Transcription PCR." Journal of Food Protection 74, no. 5 (2011): 840–43. http://dx.doi.org/10.4315/0362-028x.jfp-10-475.

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Investigation of norovirus (NoV) contamination of food items is important because many outbreaks occur after consumption of contaminated shellfish, vegetables, fruits, and water. The frequency of NoV contamination in food items has not previously been investigated in Turkey. The aim of this study was to investigate the frequency of human NoV genogroups (G) I and II in ready-to-eat tomatoes, parsley, green onion, lettuce, mixed salads, and cracked wheat balls. RNA was extracted with the RNeasy Mini Kit, and a real-time reverse transcription (RT) PCR assay was performed using primers specific fo

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WON, GAYEON, PAMELA J. SCHLEGEL, JENNIFER M. SCHROCK, and JEFFREY T. LeJEUNE. "Absence of Direct Association between Coliforms and Escherichia coli in Irrigation Water and on Produce." Journal of Food Protection 76, no. 6 (2013): 959–66. http://dx.doi.org/10.4315/0362-028x.jfp-12-512.

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Irrigation water is considered a potential source of preharvest pathogen contamination of vegetables. Hence, several organizations have recommended microbiological standards for water used to irrigate edible plants. The purpose of this study was to determine the strength of association between microbial quality indicators (coliforms and Escherichia coli) in irrigation water and on irrigated vegetables. Data analyzed included original results from a cross-sectional study conducted in the Midwestern United States during summer 2009 and information presented in two previously published studies pe

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Park, Jaehong, James W. Mjelde, Stephen W. Fuller, Jaime E. Malaga, C. Parr Rosson, and Frank J. Dainello. "An Assessment of the Effects of ENSO Events on Fresh Vegetable and Melon Supplies." HortScience 37, no. 2 (2002): 287–91. http://dx.doi.org/10.21273/hortsci.37.2.287.

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The historical effects of El Niño/La Niña events on supplies of selected fresh vegetables and melons (Cucumis melo L.) were evaluated by estimating single-equation supply relationships. Economic variables in the estimated equations were, generally, of the correct sign and significant at usual levels. El Niño events had a negative and statistically significant effect on the Texas muskmelon, Florida fall squash [Praecitrullus fistulosus Stocks) Pang.] and the California fall lettuce (Lactuca sativa L.) supply with expected production declines of 15%, 21%, and 5% relative to historical mean pr

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Poimenidou, Sofia V., Danai-Natalia Chatzithoma, George-John Nychas, and Panagiotis N. Skandamis. "Adaptive Response of Listeria monocytogenes to Heat, Salinity and Low pH, after Habituation on Cherry Tomatoes and Lettuce Leaves." PLOS ONE 11, no. 10 (2016): e0165746. http://dx.doi.org/10.1371/journal.pone.0165746.

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