SURVEY OF LEPTOSPIRA SEROVARS IN A DAIRY CATTLE HERD IN PIAUÍ STATE, BRAZIL

A.L.B.B. Mineiro R.J Vieira L.C.S. Feitosa E.E.A. Bezerra F.A.L. Costa About the authors

ABSTRACT

This study aimed to report the leptospira serovar varieties in animals from a farm located in the county of Buriti dos Lopes, within the so-called “milk basin” of Parnaíba, state of Piauí, Brazil. Samples of blood were collected from 18 Girolando cows who aborted between July 2004 and April 2005, and a sample was taken from a breeder bull. The samples were subjected to the microscopic agglutination test (SAM), using live antigens of 23 pathogenic leptospira serovars. Serum samples were screened in the dilution of 1:100. Data analysis revealed that 83.33% (15/18) of the samples showed anti-leptospira agglutinins, of which 53.33% were for the Hardjoprajitno serovar (8/15), 6.67% each for Hardjobovis (1/15), Wolffi (1/15) and Shermani (1/15), along with 4 (4/15) coagglutinations. The breeder-bull sample showed anti-leptospira agglutinins for serovar Hardjobovis with titration of 1:400, suggesting that this animal had participated in the spread of the infection in the herd.

KEY WORDS
Leptospires; abortion; cattle; serovars

Instituto Biológico Av. Conselheiro Rodrigues Alves, 1252 - Vila Mariana - São Paulo - SP, 04014-002 - São Paulo - SP - Brazil
E-mail: arquivos@biologico.sp.gov.br