| serological evidence of leptospira interrogans serovar bratislava infection and its association with abortions in cattle in northern spain. | a cross-sectional study was carried out in the basque country of spain to determine the seroprevalence of 10 leptospira serovars in a population of dairy cattle with poor fertility, and a case-control study was carried out in another northern area to investigate the role of leptospira interrogans serovar bratislava in abortions. l. bratislava was the most prevalent serovar in the cross-sectional study, with 25.4 per cent of the cows testing positive in the microagglutination test when a cut-off ... | 2005 | 15816182 |