MEDEIROS, J. M. A.; http://lattes.cnpq.br/4661529635028003; MEDEIROS, João Marcos de Araújo.
Resumen:
Antibodies to paratuberculosis were determined by ELISA in serum samples of
734 goats and 392 sheep, without clinical signs, from 14 municipalities of the semiarid
region of Paraíba state, Brazil. In goats the mean frequency was 48.3%, varying from
8.89% to 94.12% and in sheep it was of 50.63%, varying from 3.70% to 92.50%. Of the
46 farms studied, 44 (95.65%) had at least one animal seropositive. All municipalities
has affected animals with a frequency varying from 20% to 70%. In goats of unknown
breed and crossbreds the prevalence (48.56%) was significantly lower (P=0.0270) than
in pure breed goats (57.24%). In sheep with body scores of 1 to 3, the frequency
(59.39%) was significantly higher (P=0.0034) than in sheep with body score from 3 to 5
(42.42%). Non significant differences were observed in goats and sheep of different
ages, in goats with different body score, and in sheep of different breeds. In the
microbiologic examination, after 16 weeks of incubation in HEYM medium with
mycobactin J, colonies similar to those of do were observed in cultures of 9 (6.58%) out of 180 fecal samples, being one from goats and 8 from sheep. In the Ziehl Nieelsen the bacteria had morphologic and staining characteristics similar to subsp. These results suggest that paratuberculosis is endemic with high prevalence in the semiarid region of Paraíba. It is necessary to develop research on the epidemiology and control measures
of the disease in the conditions of this region. Also the risk for human beings should be
determined, mainly in relation with milking goats.