To see the other types of publications on this topic, follow the link: Parastic infection.

Dissertations / Theses on the topic 'Parastic infection'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 dissertations / theses for your research on the topic 'Parastic infection.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.

1

Ye, Xiao-Ping. "Anti-egg immunity of Schistomsoma japonicum in humans." Thesis, University of Oxford, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.389042.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Davies, Charlotte Mary. "Snail-schistosome interactions and the evolution of virulence." Thesis, University of Oxford, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.343421.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Al-Samarai, Abdul-Ghani M. Ali Hasani. "Chemotherapy of parasitic infection by Herpesvirus hominis." Thesis, University of Sheffield, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.318149.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Mellor, C. M. "Immunomodulation and chemotherapy of parasitic infections." Thesis, University of Nottingham, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.378990.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Sulaiman, Azad A. "Immunoregulation in bovine parasitic infection : mechanisms and implications." Thesis, University of Nottingham, 2016. http://eprints.nottingham.ac.uk/31639/.

Full text
Abstract:
One of the characteristic features of parasitic infections is the chronicity and persistence of the infection for long time. Their success is due to its ability to deviate the immune response of their host toward the immunoregulatory or immunosuppressive state. IL-10 is a multifunctional cytokine with both immunosuppressive and immunostimulatory effects during parasite infection, playing a crucial role in the regulation of the immunity by ameliorating the destructive immunopathology associated with excessive inflammation but often suppressing effective immune responses against pathogens and im
APA, Harvard, Vancouver, ISO, and other styles
6

Franceschini, Lidiane [UNESP]. "Infecções parasitárias e microbianas na produção do pacu Piaractus mesopotamicus e do híbrido patinga procedentes da região noroeste do Estado de São Paulo." Universidade Estadual Paulista (UNESP), 2012. http://hdl.handle.net/11449/99444.

Full text
Abstract:
Made available in DSpace on 2014-06-11T19:30:13Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-02-27Bitstream added on 2014-06-13T19:39:32Z : No. of bitstreams: 1 franceschini_l_me_botib.pdf: 588829 bytes, checksum: 796cb08752fb62d3915ad06ac0d6aa82 (MD5)<br>Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>O desenvolvimento das atividades relacionadas à aquicultura tem aumentado consideravelmente a relevância dos estudos sobre parasitas e outros patógenos de organismos aquáticos, principalmen
APA, Harvard, Vancouver, ISO, and other styles
7

Couper, Kevin Nisbet. "Immunological studies on the related apicomplexan parasites toxoplasma gondii and plasmodium chabaudi AS." Thesis, University of Strathclyde, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.273907.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Brunton, Catriona Lindsay. "Toxoplasma gondii infection of rat retinal vascular endothelial cells." Thesis, King's College London (University of London), 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.271755.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Schweitzer, Andrea Nicola. "Genetic control of antibody responses to a surface-associated antigen of Schistosoma mansoni." Thesis, University of Cambridge, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.315949.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Torlesse, Harriet. "Parasitic infection and anaemia during pregnancy in Sierra Leone." Thesis, University of Glasgow, 1999. http://theses.gla.ac.uk/7014/.

Full text
Abstract:
The role of intestinal nematode infections in the aetiology of iron deficiency and anaemia in pregnant women was investigated in peri-urban and rural areas of Western Sierra Leone. A randomised placebo-controlled field trial was carried out to evaluate the efficacy of a single course of albendazole (400 mg) and daily iron-folate supplements (36 g iron and 5 mg folate), administered after the first trimester, as control interventions for intestinal nematode infections and anaemia during pregnancy. At baseline, in the first trimester of pregnancy, the prevalence (and geometric mean intensity) of
APA, Harvard, Vancouver, ISO, and other styles
11

McKeand, Jacqueline B. "Aspects of the immumobiology of Dictyocaulus viviparus infection." Thesis, University of Glasgow, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.314727.

Full text
APA, Harvard, Vancouver, ISO, and other styles
12

Devlin, Pauline. "The purification and characterisation of a nematode (Helligmosomoides polygyrus) derived immunomodulant." Thesis, University of Nottingham, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.319621.

Full text
APA, Harvard, Vancouver, ISO, and other styles
13

Alfaiz, Faiz Abdulaziz. "Evaluation of the role of mast cells in parasitic infection." Thesis, University of Strathclyde, 2017. http://digitool.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=29560.

Full text
Abstract:
Mast cells (MCs) are important for controlling both bacterial and parasitic infections, including those caused by helminths. However, their role in combatting these infections is unclear. MCs have been shown to be essential for the successful expulsion of Trichinella spiralis worms and play a role in mounting the immune response towards a T helper 2 type. Intestinal infection with parasitic worms is associated with mastocytosis and the activation and release of specific mediators and cytokines. In this case, MCs play an essential role in the successful expulsion of gastrointestinal worms via t
APA, Harvard, Vancouver, ISO, and other styles
14

Nichol, Claire Patricia. "Host-parasite interactions of larval cestode infections." Thesis, University of Edinburgh, 1985. http://hdl.handle.net/1842/30579.

Full text
APA, Harvard, Vancouver, ISO, and other styles
15

Cabrera, Z. Y. "Characterisation of Onchocerca antigens and their application to diagnosis." Thesis, Brunel University, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.233303.

Full text
APA, Harvard, Vancouver, ISO, and other styles
16

Lynsdale, Carly L. "Evolutionary ecology of parasite infection in Asian elephants." Thesis, University of Sheffield, 2017. http://etheses.whiterose.ac.uk/19058/.

Full text
APA, Harvard, Vancouver, ISO, and other styles
17

Grimason, Anthony Martin. "The occurrence and removal of Cryptosporidium sp. oocysts and Giardia sp. cysts in surface, potable and waste-water." Thesis, University of Glasgow, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.284104.

Full text
APA, Harvard, Vancouver, ISO, and other styles
18

Johnson, Maureen Jane. "Coproantigen capture ELISA for GI nematodes." Thesis, University of Nottingham, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240993.

Full text
APA, Harvard, Vancouver, ISO, and other styles
19

Kermanizadeh, Parviz. "The role of mast cells during experimental schistosomiasis mansoni in mice." Thesis, University of Glasgow, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.363226.

Full text
APA, Harvard, Vancouver, ISO, and other styles
20

Franceschini, Lidiane. "Infecções parasitárias e microbianas na produção do pacu Piaractus mesopotamicus e do híbrido patinga procedentes da região noroeste do Estado de São Paulo /." Botucatu : [s.n.], 2012. http://hdl.handle.net/11449/99444.

Full text
Abstract:
Orientador: Reinaldo José da Silva<br>Coorientador: Sérgio Henrique Canello Schalch<br>Banca: Eduardo Makoto Onaka<br>Banca: Maurício Laterça Martins<br>Resumo: O desenvolvimento das atividades relacionadas à aquicultura tem aumentado consideravelmente a relevância dos estudos sobre parasitas e outros patógenos de organismos aquáticos, principalmente, daqueles hospedeiros com potencial para o cultivo e comercialização. O objetivo deste estudo foi avaliar a ocorrência de infecções parasitárias e microbianas na produção de pacu Piaractus mesopotamicus e do híbrido "patinga" (P. mesopotamicus x P
APA, Harvard, Vancouver, ISO, and other styles
21

Sturrock, Hugh. "Spatial epidemiology of parasitic infections and optimal survey design." Thesis, London School of Hygiene and Tropical Medicine (University of London), 2011. http://researchonline.lshtm.ac.uk/4609914/.

Full text
Abstract:
Recent years have seen a shift towards integrated control of a number of tropical diseases. Such a strategy, however, relies on an understanding of the spatial distribution and overlap of different diseases. Using a combination of fieldwork, spatial and economic analyses and computerized simulations, optimal survey designs were explored for soil-transmitted helminths (STHs), Schistosoma mansoni and Plasmodium /alciparum in East Africa, and the potential of an integrated survey approach was evaluated. For STH, analysis indicated that hookworm clusters over larger scales than Ascaris lumbricoide
APA, Harvard, Vancouver, ISO, and other styles
22

White, Emily Claire. "Infection by the gastrointestinal parasite Trichuris muris : defining the microbiota of the parasite and the host." Thesis, University of Manchester, 2016. https://www.research.manchester.ac.uk/portal/en/theses/infection-by-the-gastrointestinal-parasite-trichuris-muris-defining-the-microbiota-of-the-parasite-and-the-host(e29ed75d-014d-4e36-87ed-a6db82845511).html.

Full text
Abstract:
Intestinal dwelling parasites live in close association with the complex microbiota that inhabit our intestinal tracts. The intestinal helminth, Trichuris muris, depends on these bacteria for egg hatching and successful establishment of infection within the epithelium of the caecum and colon. Infection causes significant alterations to the host intestinal microbiota, including a decrease in bacterial diversity and shifts in proportions of certain bacterial groups. This is accompanied by a decrease in Foxp3+ regulatory T cells and changes to the metabolic potential of the host microbiota, conse
APA, Harvard, Vancouver, ISO, and other styles
23

Al-Rustamani, Laila Abdul Wahed Hassan. "Mixed Leishmania infection in vitro and in vivo." Thesis, London School of Hygiene and Tropical Medicine (University of London), 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.266278.

Full text
APA, Harvard, Vancouver, ISO, and other styles
24

Mtambo, Mkumbukwa Madundo Angelo. "Cryptosporidium infection in cats : epidemioloigy and cross transmission studies." Thesis, University of Glasgow, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.384860.

Full text
APA, Harvard, Vancouver, ISO, and other styles
25

Betts, Catherine Jean. "RT-PCR analysis of cytokine expression in murine lymph node and lung tissue following exposure to the irradiated Schistosoma mansoni vaccine." Thesis, University of York, 1996. http://etheses.whiterose.ac.uk/10876/.

Full text
APA, Harvard, Vancouver, ISO, and other styles
26

Fulford, Anthony John Charles. "Analysis of the patterns of exposure to, and infection by, Schistosoma mansoni." Thesis, University of London, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.312466.

Full text
APA, Harvard, Vancouver, ISO, and other styles
27

Keir, Pamela Alexandra. "Early responses in the pulmonary phase of Nippostrongylus brasiliensis infection." Thesis, Edinburgh Napier University, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.270301.

Full text
APA, Harvard, Vancouver, ISO, and other styles
28

Johnson, Deborah Anne. "Coproantigen capture ELISA for the detection of intestinal nematode infections." Thesis, University of Nottingham, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.310926.

Full text
APA, Harvard, Vancouver, ISO, and other styles
29

Wood, Bradbury Patrick. "The immune response of the grey mullet, Chelon labrosus (Risso, 1826), to Cryptocotyle lingua (Creplin, 1825), (Digenea)." Thesis, University of Plymouth, 1990. http://hdl.handle.net/10026.1/2237.

Full text
Abstract:
The ability of thick-lipped grey mullet to mount both humoral and cellular immune responses to Cryptocotyle lingua has been demonstrated here for the first time. Of the 3 procedures for immunisation investigated, namely exposure to live cercariae, intraperitoneal (ip) injection of whole killed cercariae and ip injection of a cercarial sonicate, the former gave the highest primary antibody titres with a peak response at 4 weeks post infection. Peak titres occurred at 5 and 7 weeks after immunisation by ip injection of sonicated cercariae and whole killed cercariae respectively. An enhanced seco
APA, Harvard, Vancouver, ISO, and other styles
30

Janssen, Christoph Stephan. "Biology of developmental activation of infective Trichinella spiralis." Thesis, University of Glasgow, 1998. http://theses.gla.ac.uk/39035/.

Full text
Abstract:
The initiation of further development is fundamental to the infectious processes of parasitic nematodes. I have examined early developmental activation of Trichinella spiralis larvae during host invasion, with particular emphasis on gene regulation and the timing of events. Using a novel approach, changes in tissue specific transcriptional activity were observed in live larvae during the infectious process with the fluorescent nucleic acid dyes SYTO12 and acridine orange. Simultaneously, the metabolic switch from anaerobic metabolism, characteristic of the infective stage, to aerobic metabolis
APA, Harvard, Vancouver, ISO, and other styles
31

Cooper, Jane. "The behavioural control of helminth infection by sheep." Thesis, University of Aberdeen, 1996. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU083310.

Full text
Abstract:
Parasites have detrimental effects on an animal's fitness and could play a significant role in shaping the adaptive behaviour of animals. Natural selection may favour those behaviours utilised by animals that minimise the risk and intensity of infections. Animals use a range of behavioural strategies associated with grooming, social, mating, migratory and foraging behaviours to minimise their parasite burdens. Herbivores have two means available for reducing the effects of parasites while foraging. They may avoid parasites or consume plants with anti-parasitic properties. Sheep (Ovis aries) we
APA, Harvard, Vancouver, ISO, and other styles
32

Feis, Marieke Eveline [Verfasser], Karl Mathias [Akademischer Betreuer] Wegner, and Hinrich [Gutachter] Schulenburg. "Host-parasite co-evolution and co-infection of invasive parasitic Mytilicola copepods in blue mussel hosts / Marieke Eveline Feis ; Gutachter: Hinrich Schulenburg ; Betreuer: Karl Mathias Wegner." Kiel : Universitätsbibliothek Kiel, 2018. http://nbn-resolving.de/urn:nbn:de:gbv:8-diss-237738.

Full text
APA, Harvard, Vancouver, ISO, and other styles
33

Bourke, Claire Deirdre. "Human cytokine responses during natural and experimental exposure to parasitic helminth infection." Thesis, University of Edinburgh, 2012. http://hdl.handle.net/1842/9434.

Full text
Abstract:
Over one third of the human population is currently infected by one or more species of parasitic helminth, but the immune responses elicited by these infections remain poorly defined. Studies in helminth-exposed human populations and laboratory models suggest that helminth infection elicits a range of different effector cell types and that protective immunity and resistance to immune-mediated pathology depends on the balance between these responses. The aim of this thesis was to investigate how cytokines, the molecular mediators of the immune system, can be used to characterise human immune ph
APA, Harvard, Vancouver, ISO, and other styles
34

Muthaukrishnan, L. "Effect of site of infection on host plant growth and metabolism." Thesis, University of Oxford, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.379917.

Full text
APA, Harvard, Vancouver, ISO, and other styles
35

Yichoy, Mayte. "Lipid uptake and metabolism in the parasitic protozoan giardia lamblia." To access this resource online via ProQuest Dissertations and Theses @ UTEP, 2009. http://0-proquest.umi.com.lib.utep.edu/login?COPT=REJTPTU0YmImSU5UPTAmVkVSPTI=&clientId=2515.

Full text
APA, Harvard, Vancouver, ISO, and other styles
36

Curra, Chiara. "Protein trafficking and host cell remodeling in malaria parasite infection." Thesis, Montpellier 2, 2010. http://www.theses.fr/2010MON20219.

Full text
Abstract:
Pour assurer ses besoins de croissance, multiplication, et survie, Plasmodium modifie sa cellule hôte, l'érythrocyte, après l'invasion. Le parasite met en place ainsi un système d'échanges (import/export) avec sa cellule hôte et le milieu extérieur. Nous avons identifié dans la base de données de Plasmodium berghei, le parasite de rongeurs, une famille de gènes, sep, correspondant à la famille etramp chez Plasmodium falciparum. Cette famille de gènes code pour des petites protéines exportées, et conservées dans tout le genre Plasmodium. Les protéines SEP (13?16 kDa) contiennent en N-terminal u
APA, Harvard, Vancouver, ISO, and other styles
37

Arnold, Markus F. F. "Host-pathogen interactions in chronic infections." Thesis, University of Aberdeen, 2012. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=192267.

Full text
Abstract:
The BacA protein plays a key role in the symbiosis of Sinorhizobium meliloti with the leguminous plant alfalfa (Medicago sativa) and is proposed to be the transmembrane subunit of an ATP‐binding cassette (ABC) transporter. BacA homologues are also present in Brucella species, enteric bacteria (known as SbmA) and Mycobacterium tuberculosis. The S. meliloti‐alfalfa symbiosis, although beneficial to both partners, can also be viewed as a chronic infection. The M. tuberculosis BacA protein is important for M. tuberculosis for the maintenance of a chronic infection. In order to study the M. tubercu
APA, Harvard, Vancouver, ISO, and other styles
38

Sanchez-Silva, Martin Antonio. "Analysis of local T cell responses in experimental visceral leishmaniasis." Thesis, London School of Hygiene and Tropical Medicine (University of London), 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.326241.

Full text
APA, Harvard, Vancouver, ISO, and other styles
39

Beadell, Jon Sumner. "Emerging infectious disease host and parasite perspectives /." College Park, Md. : University of Maryland, 2007. http://hdl.handle.net/1903/6744.

Full text
Abstract:
Thesis (Ph. D.) -- University of Maryland, College Park, 2007.<br>Thesis research directed by: Biology. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
APA, Harvard, Vancouver, ISO, and other styles
40

Stevenson, Lesley Margaret. "Studies on the role of the eosinophil leukocyte in ovine nematode infections." Thesis, Edinburgh Napier University, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.386225.

Full text
APA, Harvard, Vancouver, ISO, and other styles
41

Burton, Deborah. "The effects of parasitic nematode infection on body condition of New Forest ponies." Thesis, University of Southampton, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.315095.

Full text
APA, Harvard, Vancouver, ISO, and other styles
42

Wyderko, Jennifer Anne. "Quantifying Metagonimoides oregonensis infection distribution and effects among stream salamander hosts." Thesis, Virginia Tech, 2013. http://hdl.handle.net/10919/23208.

Full text
Abstract:
Metagonimoides oregonensis is a digenetic trematode that infects raccoons as definitive hosts, the snail Elimia proxima as a first intermediate host and in the southern Appalachians, encysts in the muscle tissue of a variety of second intermediate salamander hosts. My first study examined 289 individual salamanders representing six species from 23 streams in North Carolina to determine which species of salamanders are naturally infected.  I found that five of the six species examined had natural infections, but that there was variation in infection intensity and prevalence among the species. O
APA, Harvard, Vancouver, ISO, and other styles
43

Laurenson, Yan Christian Stephen Mountfort. "Modelling nematode infections in sheep and parasite control strategies." Thesis, University of Edinburgh, 2012. http://hdl.handle.net/1842/8178.

Full text
Abstract:
Gastrointestinal parasitism in grazing lambs adversely affects animal performance and welfare, causing significant production losses for the sheep industry. Control of gastrointestinal parasitism using chemotherapeutic treatment is under threat due to the emergence of anthelmintic resistance, thus stimulating research into alternative control strategies. Whilst investigating control strategies experimentally can be costly and time consuming, using a mathematical modelling approach can reduce such constraints. A previously developed model which describes the impact of host nutrition, genotype a
APA, Harvard, Vancouver, ISO, and other styles
44

Webster, K. A. "Ixodes ricinus, the sheep tick : Ecology and disease." Thesis, University of Glasgow, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.379007.

Full text
APA, Harvard, Vancouver, ISO, and other styles
45

Mzembe, S. A. T. "Helminth/protozoal interaction and the host response thereto." Thesis, University of Cambridge, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.383849.

Full text
APA, Harvard, Vancouver, ISO, and other styles
46

Whyte, Shona K. "Diplostomum spathaceum (digenea) in rainbow trout : experimental and immunological studies." Thesis, University of Aberdeen, 1989. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU016134.

Full text
Abstract:
Diplostomiasis, or eyefluke is caused by the metacercarial stage of the digenean parasite <i>Diplostomum spathaceum</i> which selectively invades the lenses of freshwater fish and can cause partial and total blindness. This study investigates the host-parasite relationship of <i>D. spathaceum</i> infections in rainbow trout with particular reference to the diplostomule or post-penetration stage of the parasite. The point of cercarial penetration influenced the speed with which diplostomules reached the lens and the length of time they were exposed to the fish defence mechanisms. The further aw
APA, Harvard, Vancouver, ISO, and other styles
47

Taylor, Pamela. "The effects of malaria infection on the blood feeding behaviour of anopheline mosquitoes." Thesis, Keele University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.327701.

Full text
APA, Harvard, Vancouver, ISO, and other styles
48

Vivas, Livia V. "The immunobiology of parasite and host derived glycoconjugates in malarial infection." Thesis, Open University, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.363492.

Full text
APA, Harvard, Vancouver, ISO, and other styles
49

Hurd, H. "Hymenolepis diminuta : The pathophysiology of infection in the intermediate host, Tenebrio molitor." Thesis, Keele University, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.354932.

Full text
APA, Harvard, Vancouver, ISO, and other styles
50

Tuohy, Maura B. "Genetic control and cytokine regulation of inflammatory responses to intestinal parasitic infections." Thesis, University of Nottingham, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.334501.

Full text
APA, Harvard, Vancouver, ISO, and other styles
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!