A molecular and epidemiological based-work system for detection of bovine tuberculosis focus in the state of São Paulo / Sistema de detecção de focos de tuberculose bovina no Estado de São Paulo utilizando métodos moleculares e epidemiológicos

AUTOR(ES)
DATA DE PUBLICAÇÃO

2005

RESUMO

A partnership between the Department of Preventive Veterinary Medicine and Animal Health (VPS) of the FMVZ-USP, the Coordination of Agriculture and Animal Defense of the State of São Paulo, and the Federal Inspection Service (SIF) was established to organize a work system for detection of bovine tuberculosis focus in the state, based on routine methods of carcass inspection in the abattoir, with the following objectives: 1) to determine the genetic diversity of the isolates of Mycobacterium bovis from bovines in the state of São Paulo; 2) to study the spatial distribution of the focuses; 3) to study the typology of the bovine breading units (farms), which were characterized as tuberculosis focus; 4) to verify the possibility of operating a surveillance system for detection of bovine tuberculosis focus based on the current network in the state of São Paulo. Thus, it was performed a system for data collection involving the current systems SISP (System of Inspection of the State of São Paulo) and SIF, who performed the collection of biological samples and information from May 2002 to January 2004. All samples were addressed to the VPS, where they were processed. Farms characterized as focus were traced to obtain new information. The results obtained in this study follow: 1) A total of 33 different spoligotypes were determined out of 248 bovine isolates of M. bovis in the state of São Paulo. The spoligotype SB0295 isolates were re-discriminated into 13 new M. bovis genetic profiles by the MIRU-VNTR technique; 2) From the two most prevalent spoligotypes analyzed in this study (SB0295 e SB0121), only SB0295 showed a cluster presentation by the spatial analyses; 3) Several information about typology and bovine breeding unit management were generated regarding the status of tuberculosis focus; 4) the current network in the state of São Paulo was capable of operating a system for detection of bovine tuberculosis focus

ASSUNTO(S)

mycobacterium bovis bovine tuberculosis epidemiology spoligotyping tuberculose bovina mycobacterium bovis miru-vntr spoligotyping miru-vntr epidemiologia

ACESSO AO ARTIGO

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