Resumen

PINILLA, J. C  y  DA SILVA BORGES, N. PREVALENCE OF Cystoisospora suis IN SWINE INTENSIVE HERDS AT THE CENTRAL REGION OF VENEZUELA. Rev. Med. Vet. Zoot. [online]. 2017, vol.64, n.1, pp.11-23. ISSN 0120-2952.  https://doi.org/10.15446/rfmvz.v64n1.65811.

It was carried out an investigation at the central region of Venezuela from January to June 2014 with the aim to determine the prevalence of coccidian Cystoisospora suis in intensive swine herds. For parasitic determination 572 litters were selected with signs of diarrhea. Likewise, 1.712 fecal samples were also collected in mature pigs. Stool samples were cultured in a 2.5% potassium dichromate solution and later processed by coprological technique. The results of this investigation indicated that C. suis was observed in 55 herds (82.1%) and 210 litters (36.7%) with the highest prevalence values in first two weeks of age (P < 0.05). Regarding to mature pigs, there was a significant correlation (rho = 0.35; P < 0.05) among oocysts excretion in piglets and sows, suggesting that sows may act as infection sources. Sows parity was statistically correlated with the prevalence values in litters as in lactating sows (P < 0.05). This might indicate that as parity increase, prevalence decreases in these groups. Probably these findings are associated with unknown immunologic mechanisms. It is concluding that C. suis is broadly distributed in Venezuela and it could be controlled by improving conditions sanitary herd, however, non elucidated immunologic mechanisms might be involved in the protozoa transmission cycle.

Palabras clave : Cystoisospora suis; epidemiology; herds; swine; Venezuela.

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