Genotipagem do Mycobacterium tuberculosis utilizando RFLP e Spoligotyping em associação com Miru para avaliar a epidemiologia molecular da tuberculose no município de Araraquara-SP
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Data
2009-04-27
Autores
Malaspina, Ana Carolina [UNESP]
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Universidade Estadual Paulista (Unesp)
Resumo
O estudo da epidemiologia molecular através de diferentes técnicas vigentes como Restriction Fragment Length Polymorphism (RFLP), Spacer Oligonucleotide Typing (Spoligotyping) e Mycobacterial Interspersed Repetitive Units (MIRU) revolucionou a compreensão da epidemiologia da tuberculose. Foram analisados isolados clínico de pacientes portadores de tuberculose pulmonar no município de Araraquara, entre os anos 2000 e 2006, através de genotipagem por RFLP e Spoligotyping (n=122). A técnica de RFLP permitiu a identificação de um índice de 26,4% de casos de tuberculose proveniente de infecção recente na cidade de Araraquara, no período de 2000 a 2006. Verificou-se relação epidemiológica em cerca de 68% dos casos envolvendo grupos genéticos identificados pelo RFLP. Destaca-se as transmissões intradomiciliares e a moradia em condomínios residenciais do CDHU. A técnica de RFLP permitiu a distinção de dois grandes grupos genéticos, A e B, dentre os isolados de Araraquara. Cerca de 73% dos spoligotipos obtidos foram identificados no Banco Internacional de Spoligotyping SpolDB4, sendo as famílias LAM, T e H as mais predominantes e cerca de 27% dos spoligotipos encontrados apresentaram perfis não descritos no SpolDB4. A associação do RFLP, Spoligotyping e MIRU não foi uma boa ferramenta para a análise genética dos isolados clínicos visando esclarecimentos epidemiológicos. Embora a genotipagem através do RFLP permita uma melhor discriminação entre os isolados bem como uma excelente associação entre amostras relacionadas epidemiologicamente, a técnica de Spoligotyping associada ao MIRU permite uma boa discriminação entre os isolados clínicos, da mesma forma que propicia uma satisfatória correlação entre casos ligados epidemiologicamente
Molecular epidemiology study using different current methods such as Restriction Fragment Length Polymorphism (RFLP), Spacer Oligonucleotide Typing (Spoligotyping) and Mycobacterial Interspersed Repetitive Units (MIRU) modified tuberculosis epidemiology comprehension. Clinical isolates from pulmonary tuberculosis patients from Araraquara, between 2000 and 2006, were genotyped through RFLP and Spoligotyping (n=122). RFLP provided the identification of a 26.4% level of tuberculosis cases caused by recent infection in the period. Epidemiologic association were verified in 68% of the cases in clusters identified by RFLP. Intradomiciliary transmissions and living in residential condominiums from CDHU were important factors. RFLP fingerprint provides the distinction of two big genetic groups, A and B, among Araraquara isolates. About 73% of spoligotypes were described in the International Spoligotyping Database SpolDB4 and LAM, T and H families were the most frequent, in the other hand, 27% of spoligotypes had unique profifes not described in SploDB4. RFLP, Spoligotyping and MIRU association was not a good tool to genotype clinical isolates in order to provide epidemiological understandings. Although RFLP fingerprinting allows a better discrimination as well as an excellent association among epidemiological related isolates, Spoligotyping associated with MIRU provides a good discrimination among clinical isolates as well as provides a satisfactory correlation among cases epidemiological connected
Molecular epidemiology study using different current methods such as Restriction Fragment Length Polymorphism (RFLP), Spacer Oligonucleotide Typing (Spoligotyping) and Mycobacterial Interspersed Repetitive Units (MIRU) modified tuberculosis epidemiology comprehension. Clinical isolates from pulmonary tuberculosis patients from Araraquara, between 2000 and 2006, were genotyped through RFLP and Spoligotyping (n=122). RFLP provided the identification of a 26.4% level of tuberculosis cases caused by recent infection in the period. Epidemiologic association were verified in 68% of the cases in clusters identified by RFLP. Intradomiciliary transmissions and living in residential condominiums from CDHU were important factors. RFLP fingerprint provides the distinction of two big genetic groups, A and B, among Araraquara isolates. About 73% of spoligotypes were described in the International Spoligotyping Database SpolDB4 and LAM, T and H families were the most frequent, in the other hand, 27% of spoligotypes had unique profifes not described in SploDB4. RFLP, Spoligotyping and MIRU association was not a good tool to genotype clinical isolates in order to provide epidemiological understandings. Although RFLP fingerprinting allows a better discrimination as well as an excellent association among epidemiological related isolates, Spoligotyping associated with MIRU provides a good discrimination among clinical isolates as well as provides a satisfactory correlation among cases epidemiological connected
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Palavras-chave
Mycobacterium tuberculosis, Epidemiologia molecular, Microbiologia, Mycobacterium tuberculosis, Molecular epidemiology
Como citar
MALASPINA, Ana Carolina. Genotipagem do Mycobacterium tuberculosis utilizando RFLP e Spoligotyping em associação com Miru para avaliar a epidemiologia molecular da tuberculose no município de Araraquara-SP. 2009. 97 f. Tese (doutorado) - Universidade Estadual Paulista, Faculdade de Ciências Farmacêuticas, 2009.