Resumen

PULIDO-MEDELLIN, Martín Orlando; ANDRADE-BECERRA, Roy José; RODRIGUEZ-VIVAS, Roger Iván  y  GARCIA-CORREDOR, Diego José. Prevalence and possible risk factors for Cryptosporidium spp oocyst excretion in dairy cattle in Boyacá, Colombia. Rev. mex. de cienc. pecuarias [online]. 2014, vol.5, n.3, pp.357-364. ISSN 2448-6698.

The objective was determined the prevalence and potential risk factors associated to the excretion of Cryptosporidium spp oocyst in Holstein cattle from dairy farms in Boyaca, Colombia. One hundred fecal samples were taken from females cattle by rectal stimulation. The excretion of Cryptosporidium spp oocyst was determined by the modified Ziehl Neelsen technique. To determine the potential associated factors, the Chi² (x²) test was used, having as dependent variable the excretion of Cryptosporidium spp oocysts, and as independent variables the presence of diarrhea (yes, no), age (<12 mo , >12 mo), localization (1, 2, 3, 4), and reproductive status (pregnant, non pregnant). Variables with P<0,05 were analyzed by logistic regression. The general prevalence of cattle excreting Cryptosporidium spp oocyts was 48 % (48/100). The farms studied presented prevalence of 11.1, 43.8, 50.8, and 66.6 % for farms 1, 2, 3 and 4 respectively (P>0.05). Variables that showed P<0.05 in the x² analysis were age and presence of diarrhea. Cattle with diarrhea (OR=2.99, P=0.038), and <12 mo of age (OR= 9.42, P=0.037) were associated with the excretion of Cryptosporidium spp oocysts. Cattle from dairy farms in Boyacá, present a high prevalence of Cryptosporidium spp oocyst excretion; cattle with diarrhea and minors of 12 mo of age are those who present the parasite with major frequency.

Palabras llave : Cryptosporidium spp; Protozoo; Enteropathy; Oocyst; Risk factors.

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