Abstract

ROSETE FERNANDEZ, Jorge Víctor et al. Prevalence of various Leptospira interrogans serovars in unvaccinated cows in the states of Puebla, Tabasco and Veracruz, Mexico. Rev. mex. de cienc. pecuarias [online]. 2021, vol.12, n.4, pp.1305-1316.  Epub June 06, 2022. ISSN 2448-6698.  https://doi.org/10.22319/rmcp.v12i4.5310.

The objective was to compare the prevalences of antibodies against different serovars of Leptospira interrogans among the states of Puebla, Tabasco and Veracruz, as well as among some of their municipalities, and to determine if the health status of the cows influences their fertility. Blood samples were taken from 423 cows (Bos taurus x Bos indicus and Bos indicus) from 24 ranches in 11 municipalities in the aforementioned states. The prevalences of the Hardjo and Inifap serovars were higher (P<0.05) in the state of Veracruz than in the state of Puebla, but the prevalence of the Wolffi serovar was higher (P<0.05) in the state of Puebla than in the state of Veracruz. The prevalences of the Hardjo and Palo Alto serovars were higher (P<0.05) in the state of Tabasco than in the state of Puebla, but there were no differences between these two states in the prevalences of the Inifap and Wolffi serovars (P>0.05). The number of serovars in the state of Veracruz was higher (P<0.05) than in the state of Puebla, but the number of serovars in Tabasco was intermediate; in addition, there was an important variation (P<0.05) between municipalities and between ranches in the prevalence of the different serovars. Overall, the serovar with the highest frequency was Inifap, while the serovar with the lowest frequency was Tarassovi. The health status of the cows did not influence the pregnancy rate (P>0.05); however, vaccination of cattle against Leptospira interrogans is recommended in order to decrease the risks associated with this bacterium in cattle and humans.

Keywords : Prevalence; Leptospira interrogans; Hardjo; Wolffi; Tarassovi; Cows; Pregnancy rate.

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