Resumen

VASCONEZ-HERNANDEZ, Adriana; SANDOVAL-VALENCIA, Patricio; PUGA-TORRES, Byron  y  DE LA CUEVA-JACOME, Francisco. SEROPREVALENCE OF BOVINE ENZOTIC LEUCOSIS IN 6 TO 24 MONTHS ANIMALS, IN MANABÍ, PICHINCHA AND CHIMBORAZO, ECUADOR. La Granja [online]. 2017, vol.26, n.2, pp.131-141. ISSN 1390-8596.  https://doi.org/10.17163/lgr.n26.2017.11.

Enzootic Bovine Leukemia is a viral disease that can manifest itself by the presence of tumors or asymptomatically in cattle of any age category. Its socioeconomic significance lies in the decline in milk productivity, reproductive losses, forfeitures in abattoirs, and prevents the export of livestock or derivatives. The objective of this research was to determine the seroprevalence of viral enzootic bovine on animals under two years of Pichincha, Manabí and Chimborazo, provinces that represent important sources of milk production. There were 3 307 samples of bovine blood serum analyzed, obtained from National sampling of Aphtose Fever organized by AGROCALIDAD. Samples were analyzed by serological technique indirect ELISA, 480 samples of Pichincha, 2 348 of Manabí and 479 Chimborazo. Pichincha province presented 8.13% seroprevalence, with the highest percentage of sick animals in Mejia, one of Ecuador´s main dairy basin. It was observed 0.89% seroprevalence of Manabi and Chimborazo 3.13%. The presence of the disease was also assessed according to the variables: climate, altitude, age and purpose of cattle, using chi squared to determine the relationship between them and the appearance of BVL. The investigation showed no association, showing this result of 105.14, 7.48, 38.87, 140.91 against p values 11.34, 9.21, 18.48 and 9.21 about weather, age, altitude and purpose, respectively. A greater tendency to get sick was revealed in temperate climates and higher altitudes, which could be explained by the similarity in practices of intensive exploitation. From the data obtained, further research can be made, because it is a study base line that can lead to develop a sanitary control plan of BVL from an early age of cattle.

Palabras clave : Seroprevalence; oncogenic; leukosis; leukemia; climate; altitude; purpose; age.

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