Porcine leptospirosis in Iowa

Journal of Veterinary Diagnostic Investigation : Official Publication of the American Association of Veterinary Laboratory Diagnosticians, Inc
D A MillerG W Beran

Abstract

The epidemiology of leptospirosis in Iowa swine was examined on the basis of serologic results and herd data from 55 herds in the National Animal Health Monitoring System (NAHMS) program and culture results and histories from 578 cases of reproductive failure submitted to the Iowa Veterinary Diagnostic Laboratory during a 3-year period. Thirty-eight percent of sera from NAHMS herds contained antibodies against 1 or more of 12 leptospira antigens. Leptospires were isolated from 9 (1.6%) of 578 cases of reproductive failure. Seven (78%) of the isolates were identified as Leptospira interrogans serovar kennewicki and 2 (22%) as serovar grippotyphosa. In 7 herds from which leptospires were isolated, attack rates ranged from 1% to 84%. Clinical leptospirosis, characterized by reproductive failure and confirmed by isolation of leptospires, was sporadic. No significant differences in farrowing averages and reproductive problems were observed between vaccinated and nonvaccinated NAHMS herds or between herds with higher (43-63%) or lower (14-40%) percentages of animals that were serologically positive against serovar bratislava.

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Citations

Jan 1, 1992·Journal of Veterinary Diagnostic Investigation : Official Publication of the American Association of Veterinary Laboratory Diagnosticians, Inc·C A Bolin, J A Cassells
Apr 1, 1991·Journal of Veterinary Diagnostic Investigation : Official Publication of the American Association of Veterinary Laboratory Diagnosticians, Inc·C A BolinJ N Nielsen
May 1, 2001·The Veterinary Record·C ChoiC Chae
Nov 2, 2018·Vector Borne and Zoonotic Diseases·Jean-Sébastien PalermeJune E Olds
Jun 8, 2001·Revista Da Sociedade Brasileira De Medicina Tropical·V S HomemJ S Ferreira Neto
Sep 22, 2009·The Veterinary Record·B Y JungS C Jung

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