Abstract

SALAMANCA-CARRENO, Arcesio et al. Evaluation of the Rickettsemia relationships of Anaplasma marginale with agroecological and productive factors in double purpose cattle in flooded savannas of Arauca, Colombia. Rev. investig. vet. Perú [online]. 2020, vol.31, n.3, e16134. ISSN 1609-9117.  http://dx.doi.org/10.15381/rivep.v31i3.16134.

The aim of this study was to determine the relationship between the rickettsemia of A. marginale and environmental and genetic interactions in dual-purpose cattle in Arauca, Colombia. Blood samples were taken from 269 females from 14 farms, both in the dry and rainy seasons, and were analysed with the Wright and Hemacolor(r) techniques. The interaction between the presence of A. marginale with the variables breed type, season, age and parity was evaluated by analysis of variance. Resulted showed that 66.6% of positive animals to A. marginale were found in the dry season and 100% in the rainy season (p<0.001), presenting rickettsemia values between 0 and 0.14% (average: 0.04%). The rickettsia A. marginale showed interaction with the breed type (p<0.05), the creole animals and crosses of Brown Swiss x zebu and Simmental x zebu being more resistant, whereas Bos taurus animals were more susceptible. Age, parity number, body condition and season were not dependent on rickettsemia.

Keywords : haemotropic; tropical climate; intraerythrocytic parasites; animal health; bovine production.

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