El Bueno
Palabras clave: enteritis crónica en ruminates, Mycobacterium avium paratuberculosis
Summary
Mycobacterium avium subspecies paratuberculosis (Map) is the etiologic agent of a severe granulomatous gastroenteritis in ruminants, known as bovine paratuberculosis or Johne's disease and characterized by persistent diarrhea and progressive emaciation thatfinally cause death. Calves under 6 months of age are the most susceptible to this bacterial infection by transplacental route, milk consumption or grassland contaminated feeding and although, they do not show clinical signs until they are 2 to 5 years old (incubation period), they commonly spread Map through their feces. A remarkable difficulty concerning Johne´s disease is its lack of appropriatetreatment; therefore any control scheme must be focused in identification of infected animals by reliable diagnostic tests before the appearance of clinical manifestations, in order to avoid dissemination of the infection to animals of the same or different herd, particularly when marketing possible asymptomatic animals. The infection has a worldwide distribution and it is responsible of importanteconomic losses in cattle industry. Bear to us, the disease has been reported in dairy herds of the municipality of San Pedro de los Milagros (Antioquia), but it is thought that there are many other infected regions, which makes more prominent the need of efficient methods for Map detection for rapid diagnosis and efficient control of the dissemination of the infection. In this review, we highlightsome important features of bovine paratuberculosis and provide some insight regarding probable research perspectives of this disease.
Key words: chronic enteritis in ruminants, Mycobacterium avium paratuberculosis
Resumo
O Mycobacterium avium subespécie paratuberculose (Map) é o agente que provoca uma severa gastroenterite granulomatosa em ruminantes, conhecida como doença de Johne ouparatuberculose bovina, caracterizada pela apresentação de diarréia persistente e caquexia progressivo, acabou provocando a morte ss animais com menos de 6 meses são os mais suscetíveis a contrair a infecção por tuberculose através da ingestão de leite contaminado ou erva ou via a transmissão e não obstante o facto de o agente excretada nas fezes, não há sinais clínicos antes de 2 a 5 anos, enquanto que o...
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