Estabilidad enzoótica de babesiosis bovina en la región de Puerto Berrío, Colombia

in colombia, cattle industry is the third level of economic importance after oil and agriculture exploitation systems. this economic resource is affected by hemoparasitic diseases like bovine babesiosis. transmission of babesiosis is determined by the vector-parasitic-host relation and biotic and abiotic conditional factors. equilibrium between infection and acquired immunity on bovine hosts is called enzootic stability. to determine enzootic stability levels of bovine babesiosis it has been used the detection of igg specific antibodies for bovine babesias in calves between 3 and 9 months of age. thus, a geographic region has enzootic stability when 75% or more of calves between 3 and 9 months of age are seroreactive for babesia spp. a descriptive prospective cross sectional study was carried out. a sample of 282 calves was tested to determine enzootic stability level in cattle ranches of puerto berrio region. a simple random probabilistic sampling was designed, stratified by sex and age. the sample was distributed in nine cattle ranches and was evaluated by indirect immunofluorescence antibodies technique to detection of igg specific antibodies against babesia bovis and babesia bigemina. a level of seroreactivity higher than 75% to b. bovis in four of nine cattle farms was obtained. in the cattle farms with enzootic stability, a positive relation between acaricide treatment frequency and seroreactivity was found. specifically, 90 days or more of acaricide treatment frequency induce a double level of seroreactivity than 60 days or less frequency