RESUMO
The aim of this work was to obtain the best possible estimate of the relevance of bovine tuberculosis (BTB) in humans in Argentina, Brazil, Chile, Colombia, Costa Rica, Dominican Republic, Ecuador, Peru, Uruguay and Venezuela. Sources of information were a questionnaire filled by the participant laboratories, and a search of published literature (1970-2007). Only four of these countries reported bacteriologically confirmed cases of BTB in humans. Most of these were diagnosed in Argentina, where the mean percentage of Mycobacterium bovis cases in relation to those due to Mycobacterium tuberculosis (2000-2006) ranged from 0.34% to 1.0%, according to the region. A slowly decreasing trend was observed in non HIV as well as in HIV/AIDS patients in Buenos Aires. In most of these countries, the low coverage of culture methods, especially of those including pyruvate-containing media, appropriate to isolate M. bovis, contributes to an underestimate of the problem. It was confirmed that BTB in humans exists, even though its relevance seems to be low. Milk pasteurization, sanitary controls to dairy products, and meat inspection at slaughterhouses contribute to the protection of human health. However, occupational aerogenous exposure to TB cattle and their carcasses remains a source of infection in the region.
Assuntos
Mycobacterium bovis , Tuberculose Bovina/epidemiologia , Zoonoses/epidemiologia , Adulto , Animais , Bovinos , Criança , Feminino , Humanos , América Latina/epidemiologia , Masculino , Carne/microbiologia , Leite/microbiologia , Saúde Pública , Tuberculose Bovina/microbiologia , Tuberculose Bovina/prevenção & controleRESUMO
Algunas experiencias efectuadas en el sur de la India indicarian que cepas de Mycobacterium tuberculosis de baja virulencia podrian estar produciendo efectos inmunologicos que modificarian la accion protectora de la vacuna BCG. En el estudio que aqui se presenta se trata de determinar la prevalencia de ese tipo de cepas de baja virulencia en nueve paises de las Americas. Los resultados indican que la prevalencia de esas cepas es relativamente baja en dichos paises
Assuntos
Animais , Cricetinae , Isoniazida , Mycobacterium tuberculosis/isolamento & purificação , Mycobacterium tuberculosis/patogenicidade , Virulência , Vacina BCG/imunologia , América LatinaRESUMO
Algunas experiencias efectuadas en el sur de la India indicarían que cepas de Mycobacterium tuberculosis de baja virulencia podrían estar produciendo efectos inmunológicos que modificarían la acción protectora de la vacuna BCG. En el estudio que aquí se presenta se trata de determinar la prevalencia de ese tipo de cepas de baja virulencia en nueve países de las Américas. Los resultados indican que la prevalencia de esas cepas es relativamente baja en esos países (AU)