Relevant bibliographies by topics / Nose-to-nose transmission. eng

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Academic literature on the topic 'Nose-to-nose transmission. eng'

Author: Grafiati
Published: 4 June 2021
Last updated: 3 February 2022

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Journal articles on the topic "Nose-to-nose transmission. eng"

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Kolewe, Emily L., Zachary Stillman, Ian R. Woodward, and Catherine A. Fromen. "Check the gap: Facemask performance and exhaled aerosol distributions around the wearer." PLOS ONE 15, no. 12 (December 16, 2020): e0243885. http://dx.doi.org/10.1371/journal.pone.0243885.

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Current facemask research focuses on material characterization and efficiency; however, facemasks are often not tested such that aerosol distributions are evaluated from the gaps in the sides, bottom, and nose areas. Poor evaluation methods could lead to misinformation on optimal facemasks use; a high-throughput, reproducible method which illuminates the issue of fit influencing aerosol transmission is needed. To this end, we have created an in vitro model to quantify particle transmission by mimicking exhalation aerosols in a 3D printed face-nose-mouth replica via a nebulizer and quantifying particle counts using a hand-held particle counter. A sewn, sewn with pipe cleaner nose piece, and sewn with a coffee filter facemask were used to evaluate current common homemade sewn facemask designs, benchmarked against industry standard surgical, N95 respirator tightly fit, and N95 respirator loosely fit facemasks. All facemasks have significantly reduced particle counts in front of the facemask, but the side and top of the facemask showed increases in particle counts over the no facemask condition at that same position, suggesting that some proportion of aerosols are being redirected to these gaps. An altered size distribution of aerosols that escape at the vulnerable positions was observed; escaped particles have larger count median diameters, with a decreased ratio of smaller to larger particles, possibly due to hygroscopic growth or aggregation. Of the homemade sewn facemasks, the facemask with a coffee filter insert performed the best at reducing escaped aerosols, with increased efficiency also observed for sewn masks with a pipe cleaner nose piece. Importantly, there were minimal differences between facemasks at increasing distances, which supports that social distance is a critical element in reducing aerosol transmission. This work brings to light the importance of quantifying particle count in positions other than directly in front of the facemask and identifies areas of research to be explored.
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Chen, Jenn Yih, Bean Yin Lee, and Z. H. Huang. "Quasi-Optimal Parameter Design of Five-Axis Tool Grinders Based on Taguchi Method." Materials Science Forum 697-698 (September 2011): 521–24. http://dx.doi.org/10.4028/www.scientific.net/msf.697-698.521.

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In order to improve precision of grinding as well as accuracy of ball nose end mills, the Taguchi approach was adopted to figure out quasi-optimal parameter values of the XYZ axes drives and the controller for a five-axis tool grinder. Firstly, the backlash and pitch errors of the transmission system and rotational axes were measured via a laser interferometer, and these errors were compensated by setting compensation values on a human machine interface of the controller. Four control factors with three levels and an L9 orthogonal array were used in the experiments, and each experiment was repeated three times. Next, this parameter design was applied to obtain quasi-optimal values of the drives and the controller, and further a tool grinder was employed to grind five ball nose end mills to confirm the practicability. Finally, a tool measuring and inspection machine was utilized to measure the tool geometry of each end mill for the initial and optimal designs. Experimental results were shown to indicate the considerable improvement of the accuracy of the end mills and demonstrate the effectiveness of our proposed scheme.
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Negrini, Thais de Cássia, Cristiane Duque, Ana Carolina Mascarenhas de Oliveira, Josimeri Hebling, Luis Spolidorio, and Denise Spolidorio. "Staphylococcus Aureus Contamination in a Pediatric Dental Clinic." Journal of Clinical Pediatric Dentistry 34, no. 1 (September 1, 2009): 13–18. http://dx.doi.org/10.17796/jcpd.34.1.n435k10291222035.

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Staphylococcus aureus strains can be disseminated during dental treatment and occasionally lead to contamination and infection of patients and dentists. The objective of this study was to determine the frequency and compare the number of S.aureus colonies isolated from the nose, hands and tongue of students and patients, as well as from the clinical environment, before and after dental treatment. Staphylococcus species were isolated from the tongue, nose and hands of 30 students and 30 patients and from the environment of a Pediatric Dentistry Clinic. The samples were incubated in SMA plates at 37o C for 48 hours. Results: The colonies that showed the presence of mannitol fermentation were collected as identification for Staphylococcus aureus, using CHROMagar and the coagulase test. The highest amount of S.aureus was found in the nose and tongue of children. In relation to dental students, more contamination was observed on gloved hands, followed by the tongue and hands without gloves, before clinical attendance. At the end of dental treatment, S. aureus colonies isolated from the gloved hands of students decreased significantly. Considering the clinical environment, the most contaminated areas were the auxiliary table and the storeroom, which was located at the center of the clinic. Conclusion: The dental clinic can be considered an environment for S. aureus cross-transmission. Preventative measures should be used to avoid the dissemination of pathogenic microorganisms.
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Aiano, Felicity, Samuel E. I. Jones, Zahin Amin-Chowdhury, Jessica Flood, Ifeanyichukwu Okike, Andrew Brent, Bernadette Brent, et al. "Feasibility and acceptability of SARS-CoV-2 testing and surveillance in primary school children in England: Prospective, cross-sectional study." PLOS ONE 16, no. 8 (August 27, 2021): e0255517. http://dx.doi.org/10.1371/journal.pone.0255517.

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Background The reopening of schools during the COVID-19 pandemic has raised concerns about widespread infection and transmission of SARS-CoV-2 in educational settings. In June 2020, Public Health England (PHE) initiated prospective national surveillance of SARS-CoV-2 in primary schools across England (sKIDs). We used this opportunity to assess the feasibility and agreeability of large-scale surveillance and testing for SARS-CoV-2 infections in school among staff, parents and students. Methods Staff and students in 131 primary schools were asked to complete a questionnaire at recruitment and provide weekly nasal swabs for SARS-CoV-2 RT-PCR testing (n = 86) or swabs with blood samples for antibody testing (n = 45) at the beginning and end the summer half-term. In six blood sampling schools, students were asked to complete a pictorial questionnaire before and after their investigations. Results In total, 135 children aged 4–7 years (n = 40) or 8–11 years (n = 95) completed the pictorial questionnaire fully or partially. Prior to sampling, oral fluid sampling was the most acceptable test (107/132, 81%) followed by throat swabs (80/134, 59%), nose swabs (77/132, 58%), and blood tests (48/130, 37%). Younger students were more nervous about all tests than older students but, after completing their tests, most children reported a “better than expected” experience with all the investigations. Students were more likely to agree to additional testing for nose swabs (93/113, 82%) and oral fluid (93/114, 82%), followed by throat swabs (85/113, 75%) and blood tests (72/108, 67%). Parents (n = 3,994) and staff (n = 2,580) selected a preference for weekly testing with nose swabs, throat swabs or oral fluid sampling, although staff were more flexible about testing frequency. Conclusions Primary school staff and parents were supportive of regular tests for SARS-CoV-2 and selected a preference for weekly testing. Children preferred nose swabs and oral fluids over throat swabs or blood sampling.
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Reddy, Mohan. "Signal Detection in Spatially Multiplexed MIMO Systems." International Journal for Research in Applied Science and Engineering Technology 9, no. VI (June 30, 2021): 5002–5. http://dx.doi.org/10.22214/ijraset.2021.36053.

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The transmission of several signals and reception of those signals, it requires the implementation of multiple transmitters at the transmitter side and the multiple receivers at the receiver side. This type of system is called multiple input multiple output (M.I.M.O) system. The M.I.M.O systems will result in obtaining the better use of the available spectrum for transmissions of the different signals in the same spectrum and this makes the M.I.M.O systems most dependable for the wireless communications. But the presence of several signals in the same bandwidth of spatial multiplexing matrix in M.I.M.O systems makes it difficult for the signal to get detected at the receiver end. There are plenty of techniques introduced to avoid the difficulty in sensing the signal at receiver in M.I.M.O systems. In this paper we will be discussing about the signal detection technique called minimum mean square error technique (MMSE) which uses the inversion of the matrix to retrieve the signal and the iteration-based method that is an improvised technique than MMSE technique where the matrix inversion step is avoided and provides better results. The results are obtained by plotting the bit error rate versus the signal to nose ratio using MATLAB
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Dwijayanti, Fifi, Hendi Setiadi, and Martya Rahmaniati Makful. "COVID-19 and Cancer Care in Indonesia: What we have done in Dharmais Cancer Center Hospital." Indonesian Journal of Cancer 14, no. 2 (July 1, 2020): 37. http://dx.doi.org/10.33371/ijoc.v14i2.747.

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At the end of 2019, the novel coronavirus (CoV) of severe acute respiratory syndrome (SARS), named SARS- CoV-2 was approved as a microbial agent that causes viral pneumonia in patients who are linked epidemiologically to the seafood market in Wuhan (Wuhan) Hubei province, China [1]. The World Health Organization (WHO) stated the coronavirus or COVID-19 as a pandemic because it has spread globally in the world since March 11, 2020 [2]. There have been more than 8 million cases reported with more than 450 thousand deaths around the world until June 19, 2020 [3]. Indonesia reported the first cases of COVID-19 in early March 2020 and currently 43,803 cases with 2,373 deaths [4]. Indonesia has the highest cases of COVID-19 in Southeast Asia [5]. WHO stated that according to the current evidence, coronavirus is transmitted among people through respiratory droplets and contact routes [6-8]. Droplet transmission is different from airborne disease. Droplet transmission occurs when a person closely contacted (within 1 m) with someone who has respiratory symptoms (e.g. coughing or sneezing,) and was therefore at risk of having his/her mucosae (mouth and nose) or conjunctiva (eyes) exposed to potentially infective respiratory droplets. Droplet transmission may also occur through fomites in the immediate environment around the infected person [9]. Increasing cases occur continuously become alert for our institution as health care providers.
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B V, Mahendra, and Kavitha R S. "A Review on COVID19: Evolution, Structure of Corona Virus and Comparison of COVID19 with Common FLU." Shanlax International Journal of Arts, Science and Humanities 8, S1-Feb (February 6, 2021): 54–59. http://dx.doi.org/10.34293/sijash.v8is1-feb.3931.

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Covid-19 is a pandemic disease that threatened the World both socially and economically. The virus originated from Wuhan – China in December 2019. Globally 18,354,342 cases were reported and total mortality cases are 6,96,147 till Aug 5 2020. The spreading of Novel Covid19 is faster than MARS and SARS Virus. The symptoms are very similar to the common cold or flu such as running nose sneezing, sore throat are the common symptoms and difficulty in breathing, severe muscle ache, dry cough GIT irregularity were the serious symptoms. The infection may leads to pneumonia, Acute Respiratory disorder (ARD) Syndrome. The incubation period varies from 7- 14 days. The transmission occurs through physical contact with infected person, infected droplets and contaminated objects. Laboratory test includes CT scan, Nasal Oral pharyngeal swab tests, RT PCR were employed for diagnosis. The disease at the end of August showed increasing mortality rate. Maintaining Physical distance is the only measure to overcome the infection.
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Kalal, Nipin, and Nimarta . "Crimean-congo haemorrhagic fever: a global perspective." International Journal of Research in Medical Sciences 7, no. 12 (November 27, 2019): 4812. http://dx.doi.org/10.18203/2320-6012.ijrms20195562.

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Crimean-Congo Haemorrhagic Fever (CCHF) is caused by infection with a tick-borne virus (Nairovirus) in the family Bunyaviridae, causing severe and often fatal haemorrhagic fever in humans. CCHF is pervasive, now found in Europe, Asia, Africa, the Middle East and the Indian subcontinent. CCHF spreads to humans either by tick bites or by contact with blood and tissues from infected animals or humans. CCHF outbreaks constitute a threat to public health services because of its epidemic potential, its high case fatality ratio (10-40%), and its potential for nosocomial outbreaks and its quandaries in treatment and prevention. It is characterized by sudden onset with initial sign symptoms including fever, chills, agitations, myalgia, headaches, vomiting, abdominal pain, arthralgia, ecchymosis, melena, haematuria, nose bleeding, vaginal bleeding, bradycardia, thrombocytopenia. It is diagnosed by Reverse Transcriptase Polymerase Chain Reaction (RT-PCR) assay, ELISA test, antigen detection tests. Overall supportive therapy is the mainstay of patient management in CCHF. Seriously ill patients require intensive care. Ribavirin for the treatment of CCHF cases it is most effective, if administered very soon after the onset of clinical signs (e.g., during the first 48 hours). Prevention should be taken which reduce risk of tick to human transmission and human to human transmission.
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Farris, Stefano, Susanna Buratti, Simona Benedetti, Cesare Rovera, Ernestina Casiraghi, and Cristina Alamprese. "Influence of Two Innovative Packaging Materials on Quality Parameters and Aromatic Fingerprint of Extra-Virgin Olive Oils." Foods 10, no. 5 (April 23, 2021): 929. http://dx.doi.org/10.3390/foods10050929.

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The performance of two innovative packaging materials was investigated on two Sardinian extra-virgin olive oils (Nera di Gonnos and Bosana). In particular, a transparent plastic film loaded with a UV-blocker (packaging B) and a metallized material (packaging C) were compared each other and to brown-amber glass (packaging A). During accelerated shelf-life tests at 40 and 60 °C, the evolution of quality parameters (i.e., acidity, peroxide value, K270, and phenolic content) was monitored, together with the aromatic fingerprint evaluated by electronic nose. Packaging B resulted in the best-performing material in protecting oil from oxidation, due to its lower oxygen transmission rate (0.1 ± 0.02 cm3/m2 24 h) compared to packaging C (0.23 ± 0.04 cm3/m2 24 h). At the end of storage, phenolic reduction was on average 25% for packaging B and 58% for packaging C, and the aromatic fingerprint was better preserved in packaging B. In addition, other factors such as the sanitary status of the olives at harvesting and the storage temperature were demonstrated to have a significant role in the shelf life of packaged extra-virgin olive oil.
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COMANDOLLI-WYREPKOWSKI, Claudia Dantas, Iryna GRAFOVA, Maricleide de Farias NAIFF, Maurizio AVELLA, Gennaro GENTILE, Andriy GRAFOV, and Antonia Maria Ramos FRANCO. "Topical treatment of experimental cutaneous leishmaniasis in golden hamster (Mesocricetus auratus) with formulations containing pentamidine." Acta Amazonica 47, no. 1 (March 2017): 39–46. http://dx.doi.org/10.1590/1809-4392201601333.

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ABSTRACT Current treatment of cutaneous leishmaniasis (CL) relies mainly on pentavalent antimonials salts and second-line drugs include pentamidine and amphotericin B, but these therapies have side effects and require parenteral administration. The aim of this work was to evaluate the topical formulations containing pentamidine isethionate (PI) in the experimental treatment of cutaneous leishmaniasis (CL). Golden hamsters (Mesocricetus auratus) were infected in the nose with Leishmania (Leishmania) amazonensis. Six treatment groups received different topical treatments of anhydrous or hydrating emulsions, for a maximum of 10 days, with an application of 50 mg day-1. After treatment tissue samples of lesions were evaluated by histology, transmission electron microscopy and biopsy cultivation. Compared with untreated group, topical treatment with hydrating emulsion with 10% PI and usnic acid (ACE5AU) showed significantly decrease in volume lesion (P= 0.028) on 20th day after the end of the treatment with reduction of 27.37%. Topical treatment with anhydrous emulsion with 10% PI and usnic acid (ACPU) reduces parasite burden in Golden hamsters. This study demonstrated the potential of topical treatment to reduce the number of parasites that could be combined with others drugs and to have a faster and more effective treatment of cutaneous leishmaniasis.
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Dissertations / Theses on the topic "Nose-to-nose transmission. eng"

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Freschi, Carla Roberta. "Investigação experimental sobre a transmissão aerógena e naso-nasal de Salmonella enterica subespécie enterica sorotipo Derby em suínos /." Jaboticabal : [s.n.], 2007. http://hdl.handle.net/11449/101255.

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Orientador: Luiz Fernando de Oliveira e Silva Carvalho
Banca: Raul José Silva Girio
Banca: Rosangela Zacarias Machado
Banca: Aníbal de Sant'Anna Moretti
Banca: José Soares Ferreira Neto
Resumo: Os suínos e seus produtos são considerados importantes fontes de salmonelose humana. Desta forma, o controle das infecções nas granjas é considerado essencial para a prevenção de Salmonella na cadeia produtiva de suínos. No entanto, o maior entrave na profilaxia da infecção é, principalmente, a falta de conhecimentos sobre sua epidemiologia em sistemas de produção intensivos de criação de suínos, principalmente em relação às possíveis vias de transmissão desse agente. Este estudo testou a hipótese da transmissão nasonasal (E1) e aerógena (E2) de Salmonella Derby na espécie suína. Os experimentos foram realizados em isoladores construídos em aço inoxidável e vidro e totalmente controlados. No E1, os isoladores dos suínos inoculados e dos suínos sentinela estavam conectados por pequena fenda que permitia apenas o contato naso-nasal. Em E2 os isoladores estavam conectados por condutores de ar que permitiam o fluxo de ar unidirecional do isolador 1 (suínos controle) ao isolador 3 (suínos sentinela), passando pelo isolador 2 (suínos inoculados). A duração de ambos experimentos foi de 15 dias. Nesse período, amostras dos sacos de dejetos, dos suabes retais, das fezes do piso e do ar foram colhidas diariamente e avaliadas quanto a presença de Salmonella. A hipótese de transmissão naso-nasal e aerógena de S. Derby não foi corroborada pelo isolamento e detecção do agente nos animais sentinela.
Abstract: Pork and pork products are recognized as one of the major sources for human salmonellosis. Howeveri the infection control in the farms is considered essential for the Salmonella prevention in the productive swine chain. However, the most impediment in the infection prophylaxis is, mainly, the lack of knowledge on its epidemiology in intensives production systems, mainly related to the transmission possible ways of this agent. This study has tested the hypothesis of nose-to-nose and airborne transmission of Salmonella Derby in the swine species. The trials were performed using stainlesssteel and glass isolation cabinets and totally controlled. In the trial 1, inoculated pigs and sentinel pigs isolation cabinets were connected by small crack that allowed only the nose-to-nose contact. In the trial 2 isolation cabinets were connected by air ducts that allowed an unidirectional airflow from cabinet 1 (control pigs) to cabinet 3 (sentinel pigs), passing through cabinet 2 (inoculated pigs). The duration of both trials were 15 days. At this period, slurry bags, rectal swabs, pooled faecal from the floor and air samples were collected daily and assessed by culture and PCR. The nose-to-nose and airborne transmission hypothesis of S. Derby was not corroborated by the agent isolation and detection in the sentinel pigs.
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Oliveira, Luís Guilherme. "Infecção experimental por Salmonella enterica subspécie enterica sorotipo Panama e tentativa de transmissão naso-nasal em leitões desmamados /." Jaboticabal : [s.n.], 2008. http://hdl.handle.net/11449/89215.

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Orientador: Luiz Fernando de Oliveira e Silva Carvalho
Banca: Geraldo Camilo Alberton
Banca: Adolorata Aparecida Bianco Carvalho
Resumo: A transmissão pela via fecal-oral é considerada o mais importante meio de disseminação de Salmonella sp. entre os suínos. Foi comprovada que a transmissão de Salmonella sp. através do contato naso-nasal entre suínos pode ser viável. Porém, alguns experimentos não conseguiram demonstrar tal transmissão em determinados sorotipos de Salmonella enterica. Este ensaio teve como objetivo produzir infecção experimental de Salmonella enterica subsp. enterica sorotipo Panama e verificar a importância da via nasonasal na transmissão entre leitões desmamados. Seis leitões recém-desmamados foram adquiridos de granja previamente selecionada, livre de Salmonella sp. Análises bacteriológicas confirmaram que todos os animais estavam livres de contaminação por Salmonella sp. Utilizaram-se baias isoladoras que proporcionavam o contato naso-nasal e eliminavam a possibilidade de outras vias de transmissão e de contaminação externa. Três grupos foram formados: controle, sentinela e infectados. Os leitões do grupo controle e do grupo sentinela receberam, individualmente, por via oral, solução estéril, enquanto que leitões do grupo infectado receberam inóculo contendo 2,16 X 1010 UFC de Salmonella Panama. Foram alojados nos isoladores respectivos e retirados depois de 14 dias, período no qual amostras de fezes eram colhidas e avaliadas diariamente. Os animais foram necropsiados e amostras de tecidos colhidas. Realizaram-se testes bacteriológicos, ELISA e sorotipificação. Houve infecção sistêmica por Salmonella Panama nos animais do grupo infectado, porém os resultados revelaram não haver a transmissão pela via naso-nasal entre leitões desmamados, pois em nenhum momento o agente foi isolado dos animais sentinelas.
Abstract: The faecal-oral transmission is considering the most important route for transmission of Salmonella sp. between pigs. It has been proven that the Salmonella sp. transmission through the nose-to-nose contact among pigs can be viable. However, current data could not demonstrate such transmission in certain serovars of Salmonella enterica. This study aimed to produce experimental infection of Salmonella enterica serovars Panama and verifies the importance of the nose-to-nose contact in the transmission among weaned pigs. Six recently-weaned pigs were acquired from farm previously selected; free from Salmonella sp. Bacteriological analysis ruled out previous Salmonella sp contamination in all selected subjects. Isolations cabinets were used that provided the nose-to-nose contact and to eliminated the presence of other transmission routes and of outside contamination. Three groups were formed: control, sentinel and infected. The pigs of the control group and of the sentinel group, received, individually, orally sterile solution, while pigs of the infected group received solution containing 2,16 X 1010 CFU of Salmonella Panama. They were housed in the respective isolations cabinets and removed from it after 14 days, period in which samples of faeces were collected and submitted to daily analysis. The animals were necropsied and samples of tissues were collected. They were tested by bacteriological analysis, ELISA and serovars typification. There was systemic infection for Salmonella Panama in the animals of the infected group; however there was non transmission by nose-to-nose contact among weaned pigs, justifying the non isolation of the agent in the sentinel group at any moment.
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Masson, Guido Carlos Iselda Hermans. "Infecção experimental por Salmonella enterica subspécie enterica sorotipo Panama e tentativa de transmissão área em leitões desmamados /." Jaboticabal : [s.n.], 2008. http://hdl.handle.net/11449/89242.

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Orientador: Luiz Fernando de Oliveira e Silva Carvalho
Banca: Geraldo Camilo Alberton
Banca: Luís Antonio Mathias
Resumo: O objetivo deste trabalho foi avaliar infecção por Salmonella enterica subespécie enterica sorotipo Panama e a possibilidade de transmissão aérea de entre leitões desmamados. Seis leitões recém-desmamados e sadios foram igualmente distribuídos na formação dos três grupos experimentais - o grupocontrole, o grupo infectado e o grupo-sentinela. Os animais foram alojados dois a dois em três câmaras de isolamento especialmente projetadas para o estudo, que garantiam não apenas que os animais fossem mantidos completamente isentos de contacto com o ambiente externo mas que o fluxo de ar unidirecional, no sentido animais-controle - animais infectados - animais-sentinela, fosse a única maneira de disseminação do agente. Salmonella Panama com resistência induzida ao ácido nalidíxico (Salmonella PanamaNal+) foi utilizada na preparação do inóculo. Análises microbiológicas de suabes retais dos animais foram realizadas diariamente em todos os animais durante os 14 dias subseqüentes à inoculação, após o que os animais foram eutanasiados e necropsiados, visando análises microbiológicas de amostras de órgãos internos. As análises bacteriológicas iniciaram-se pelo pré-enriquecimento das amostras, em caldo GN-Hajna para as amostras de fezes e a água peptonada tamponada para os órgãos internos. Prosseguiram pelo enriquecimento em caldo Rappaport-Vassiliadis e em Tetrationato Müller Kaufmann para então serem semeadas nos ágares xilose lisina tergitol 4 (XLT4) e verde-brilhante modificado, ambos suplementados com ácido nalidíxico. Colônias características foram submetidas às provas bioquímicas, em ágar tríplice açúcar ferro (TSI) e ágar ferro lisina (LIA) e posteriormente a avaliação sorológica. Amostras de sangue foram colhidas de todos os animais e, submetidas ao teste ELISA... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: The aim of this study was to evaluate the experimental infection wich Salmonella serotype Panama and the airborne transmission of among weaned piglets. Six weaned piglets were used and distributed in three groups of animals - group 1 (control), group 2 (infected) and group 3 (sentinels). All animals were housed in three stainless-steel glass isolation cabinets connected by unidirectional airflow air ducts. Animals didn't have contact with the external environment, guaranteeing that airflow was the unique way of the agent's spread. An induced nalidixic acid resistant strain of Salmonella Panama (Salmonella Panama Nal+) were used to induce infection in one of the groups. Bacteriological analyses of rectal swabs were implemented daily within 14 days after inoculation. For bacteriological exams of internal organs animals were euthanized and necropsied. A pre-enrichment in broth GN-Hajna for the fecal samples and in buffered peptone water for the internal organs samples were conducted. Subsequently, samples were transferred to Rappaport-Vassiliadis and Tetrationato Müller Kaufmann. The samples were transferred to the agar xylose-lysine-tergitol 4 (XLT4) and to a modified brilliant green media, both supplemented with nalidixic acid. Characteristic colonies were submitted to the biochemical tests triple sugar iron agar (TSI) and lysine iron agar (LIA) and later to the serological prove. Samples of blood were taken twice - before Salmonella inoculation and before euthanasia of the piglets. Sera was submitted to the ELISA test. Results showed a Salmonella systemic infection in the inoculated animals (infected group), but there were no evidence of Salmonella transmission to the sentinel group.
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Book chapters on the topic "Nose-to-nose transmission. eng"

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"the emission; this is the entrance of the airborne pollutants into the open atmosphere. The local position of this entrance is the emission source, - the transmission, including all phenomena of transport, dispersion and dilution in the open atmosphere, - the immission; this is the entrance of the pollutant into an acceptor. As we are regarding odoriferous pollutants, the immisson is their entrance into a human nose. About air pollution from industrial emission sources, i.g. S02 from power plants, a wide knowledge is available, including sophisticated methods of emission measurement, atmospheric diffusion calculation and measurement of immission concentration in the ambient air. In most countries we have complete national legal regulations, concerning limitation of air contaminent emissions, calculation of stack height and at least evaluation and determination of maximum inmission values. Within this situation the question arises, whether these wellproved methods and devices are suitable for agricultural odour emissions from agricultural sources too. It is well known that all calculations and values, established in air pollution control, are based on large sets of data, obtained by a multitude of experiments and observations. The attempt to apply these established dispersion models to agricultural emission sources, leads to unreasonable results. A comparison in table 1 shows that the large scale values of industrial air pollutions, on which the established dispersion models are based, are too different from those in agriculture. In order to modify the existing dispersion models or to design other types of models, we need the corresponding sets of observations and of experimental data, adequate to the typical agricultural conditions. There are already a lot of investigations to measure odour at the source and in the ambient air. But we all know about the reliability of those measurements and about the difficulties to quantify these results adequate to a computer model calculating the relation between emission and immision depending on various influences and parameters. So we decided to supplement the odour measurements by tracer gas measurements easy to realise with high accuracy. The aim is to get the necessary sets of experimental data for the modification of existing dispersion models for agricultural conditions. 2. INSTRUMENTAL 2.1 EMISSION the published guideline VDI 3881 /2-4/ describes, how to measure odour emissions for application in dispersion models. Results obtained by this method have to be completed with physical data like flow rates etc. As olfactometric odour threshold determination is rather expensive, it is supplemented with tracer gas emissions, easy to quantify. In the mobile tracer gas emission source, fig. 2, up to 50 kg propane per hour are diluted with up to 1 000 m3 air per hour. This blend is blown into the open atmosphere. The dilution device, including the fan, can be seperated from the trailer and mounted at any place, e.g. on top of a roof to simulate the exaust of a pig house or in the middle of a field to simulate undisturbed air flow. 2.2 TRANSMISSION For safety reasons, propane concentration at the source is always below the lower ignition concentration of 2,1 %. As the specific gravity of this emitted propane-air-blend is very close to that of pure air (difference less than 0,2%) and as flow parameters can be chosen in a wide range, we assume." In Odour Prevention and Control of Organic Sludge and Livestock Farming, 114. CRC Press, 1986. http://dx.doi.org/10.1201/9781482286311-38.

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