Correlation of alterations produced by leptospirosis at hepato-renal level with productive and reproductive variables in bovines of the Sabana de Bogotá

Abstract

This research was performed in four milking farms located at la Sabana de Bogotá. 78 animals were studied and divided in three age groups: cows, heifers and calves. The leptospira spp was diagnosed by the microagglutination – Lisis (MAT) method. A serological follow up was done for a year with nine samplings and L. hardjo, L. icterohaemorrhagiae, L. pomona, L. canicola y L. grippotyphosa, were evaluated with hepatic tests such as: Alanino amino transferasa (ALAT), Aspartato amino transferasa (ASAT); and renal tests such as: Ureic Nitrogen in Blood (BUN) and CREATININE. There were compared to records of productive variables like milk production and reproductive variables like the period of time between deliveries, open days and conception services. Prevalence of Leptospira spp found in bovines of four farms at Sabana de Bogotá was 31.74%. The highest prevalence during the study was 12.7% for serovar L. hardjo (90/711), regarding the farms the serovar with the highest prevalence was L. icterohaemorrhagiae in the farm with 29% (24/85). The age group number two (heifers) reported the highest prevalence to serovar L. icterohaemorrhagiae with 16.5% (20/127). There were no physilogical changes in age groups and farms in the following variables: ALAT with 20.452 U/L in average and CREATININE 1.2769 mg/dl in average, but there was a slightly decrease in BUN 12.934 mg/dl. There were some alterations in variable values: ASAT 108.96 U/L, 238.64 open days, Interval between deliveries 522.78 days, conception Services 2.56 and with the milk production, there is no a statistical relation during the samplings between serovares and milk production variable.