Serological prevalence to six leptospiral serovars in cattle in Asturias (Northern Spain)

The prevalence of antibody to six serovars of Leptospira interrogans in cat tle in Asturias (Northern Spain) was determined by the microscopic agglutin ation test (MAT). Using 50 % agglutination or lysis at a dilution of 1:10 o r more as the criteria for seropositivity, 371 of 3578 (10.36 %) animals we re found to react with one serovar. The most commonly detected serovars wer e pomona (5.59 %) and grippotyphosa (2.37 %) whilst serovar hardjo (0.75 %) , interohaemorrhagiae (0.64 %), poi (0.64 %) and autumnalis (0.36 %) were f ound at lower frequencies.