Search for agglutinating antibodies to Leptospira and Leptonema in horses, São Paulo, Brazil
Keywords:Leptospira, Leptospirosis, Equidae, Horses, Antibodies, Serology
Sera from 922 apparently health equines intended for therapeutic sera production in a farm of the Instituto Butantã in São Roque, State of São Paulo. Brazil, were examined for detection of antibodies to serovars of Leptospira interrogans and to Leptonema illini by the microscopic agglutination (MA) test. Significant antibody titres were found in 807 sera (87.5%) and 659 (81.7%) of those sera reacted to more than one serovar at titres ranging from 1: 100 to 1:6,400 with predominance of low titres (≤ 1:400). From the 23 screening serovars, only tarassovi did not react. The most common reactions among positive sera occurred to antigens from the Icterohaemorrhagiae serogroup (84%) and to Leptonema illini (79.2%).
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