Abstract
ABSTRACT Bovine leptospirosis assumes great economic importance since it affects several production aspects. Therefore, knowledge about the occurrence and distribution of this disease is fundamental to adopt the correct prevention measures. The present study aimed to evaluate the frequency of anti-Leptospira spp. antibodies in 24,483 bovine serum samples received between 2007 to 2015 from 21 Brazilian states. Of these, 8,643 (35.3%) were reagents in the microscopic agglutination test to one or more serovars of Leptospira spp. The most frequent serovars were Wolffi (61.47%), Tarassovi (9.62%) and Pomona (7.20%). Hardjo serovar presented a prevalence of 6.27%. Among the 21 states analyzed, the State of Pernambuco had the highest frequency with 88.24% and the State of São Paulo was the origin of the largest number of analyzed samples (13,838), with a frequency of 31.54% of reagents. The results demonstrate a high exposure to several serovars of Leptospira spp. in bovine species in Brazilian states, showing the importance of adopting prophylactic measures in order to reduce the risk of infection in this specie.
Highlights
Leptospirosis is a zoonosis reported all over the world in all animal species already studied and has a great impact in all sectors of cattle production systems, since it is responsible for reproductive failures such as abortions, stillbirths, weak newborns and decrease growth rate (Lilenbaum; Martins, 2014)
The present study aimed to evaluate the frequency of anti-Leptospira spp. antibodies in 24,483 bovine serum samples received between 2007 to 2015 from 21 Brazilian states
The results demonstrate a high exposure to several serovars of Leptospira spp. in bovine species in Brazilian states, showing the importance of adopting prophylactic measures in order to reduce the risk of infection in this specie
Summary
Leptospirosis is a zoonosis reported all over the world in all animal species already studied and has a great impact in all sectors of cattle production systems, since it is responsible for reproductive failures such as abortions, stillbirths, weak newborns and decrease growth rate (Lilenbaum; Martins, 2014). The causative agent of this disease belongs to the genus Leptospira with more than 260 serovars identified, which can be distinguished and grouped into their antigenicity, as well as presents a predilection for its animal host, denominated as maintenance host. This bacteria can infect other animal species (accidental hosts) (Levett, 2001; Adler; De La Peña Moctezuma, 2010). The presence of serogroups such as Wolffi, Icterohaemorragiae, Tarassovi, Pomona and Grippotyphosa in bovine herds is observed, Hardjo serovar is the most common (Juliano et al, 2000; Favero et al, 2001; Araújo et al, 2005; Castro et al, 2008; Oliveira et al, 2009)
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