| Ano de defesa: |
2018 |
| Autor(a) principal: |
Silva Filho, Ernandes da
 |
| Orientador(a): |
Bührer, Samira
|
| Banca de defesa: |
Bührer, Samira,
Souza, Guilherme Rocha Lino de,
Moura, Rodrigo Scaliante de,
André, Maria Cláudia Dantas Porfírio Borges,
Pinto, Emerith Mayra Hungria |
| Tipo de documento: |
Dissertação
|
| Tipo de acesso: |
Acesso aberto |
| Idioma: |
por |
| Instituição de defesa: |
Universidade Federal de Goiás
|
| Programa de Pós-Graduação: |
Programa de Pós-graduação em Medicina Tropical e Saúde Publica (IPTSP)
|
| Departamento: |
Instituto de Patologia Tropical e Saúde Pública - IPTSP (RG)
|
| País: |
Brasil
|
| Palavras-chave em Português: |
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| Palavras-chave em Inglês: |
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| Área do conhecimento CNPq: |
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| Link de acesso: |
http://repositorio.bc.ufg.br/tede/handle/tede/8319
|
| Resumo: |
Listeriosis is a bacterial infection caused by Listeria monocytogenes, a bacterium transmitted mainly by the ingestion of contaminated food. It is the main responsible for food infections with low morbidity rate, but when contamination occurs in immunosuppressed the mortality rates are high, representing an important public health problem. Methods available for identification of the presence of Listeria monocytogenes include isolation of the bacterium through conventional culture, laborious, time-consuming and low sensitivity method, and usually complex and costly molecular and / or immunological methods requiring trained personnel and equipment. Therefore, the search for rapid, sensitive and specific methods for detecting the presence of Listeria monocytogenes in foods is useful and necessary for infection prevention and great value to reduce the mortality rate in the immunocompromised as well as to enable the epidemiological surveillance of this disease. The objectives of the study were: To develop lateral flow immunochromatographic test for the identification of L. monocytogenes in foods; To evaluate the performance of the lateral flow immunochromatographic test using food samples naturally and artificially contaminated with L. monocytogenes. As the detection agent, were impregnated glass fiber with anti-internalin-A MAb-2D12 conjugated to colloidal gold. As a capture agent, were sensitized, on nitrocellulose paper, the test line with polyclonal anti-internalin-B antibody, and in the control line with protein A, to validate the activity of the detection agent. Inoculations of standard strains of Listeria monocytogenes were used for evaluation of the Listeria detection in the proposed test. As a negative control, we used strains of Listeria innocua, Enterobacter sp. and Bacillus cereus. Positivity was obtained in prototypes of rapid tests sensitized with Polyclonal Anti-InlB. Positivity was observed in samples containing culture medium and newly cultured bacteria, validating the methodology used in the development of the test. The detection capacity of the test at D concentration is 2x10 4 CFU / mL. |
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