Three case studies involving Leptospira interrogans serovar pomona infection in mixed farming units
Gummow, B., Myburgh, J.G., Thompson, P.N., van der Lugt, J.J., and Spencer, B.T. (1999) Three case studies involving Leptospira interrogans serovar pomona infection in mixed farming units. Journal of the South African Veterinary Association, 70. pp. 29-34.
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Three case studies involving Leptospira interrogans serovar pomona outbreaks within mixed farming systems in South Africa are described. On 2 farms, pigs constituted the main enterprise with cattle and sheep of secondary importance. On each of these 2 farms, abortion due to L. pomona in sows was confirmed by culture, and antibody titres to pomona were detected in cattle, sheep, horses and dogs. On the 3rd farm, a piggery was of secondary importance to cattle farming. Abortion and death in cows occurred on this farm and serology showed titres to various serovars, including pomona. L. pomona was also isolated from bovine urine, an aborted bovine foetus and kidneys from slaughtered pigs. This particular case study was regarded as clinically atypical in that adult Jersey cattle died of acute leptospirosis in a semiarid region of South Africa. In all 3 case studies, the poor management of pig effluent and of the drinking water and its sources played a pivotal role in the transmission of the disease. Inadequate vaccination of animals against Leptospira and poor record-keeping within the secondary farming enterprises were also contributing factors to the spread of leptospirosis.
|Item Type:||Article (Refereed Research - C1)|
|Keywords:||abortion, bovine, epidemiology, Leptospira interrogans serovar pomona, leptospirosis, mixed farming units, porcine, water.|
|Date Deposited:||07 Jun 2012 01:31|
|FoR Codes:||07 AGRICULTURAL AND VETERINARY SCIENCES > 0707 Veterinary Sciences > 070704 Veterinary Epidemiology @ 100%|
|SEO Codes:||97 EXPANDING KNOWLEDGE > 970107 Expanding Knowledge in the Agricultural and Veterinary Sciences @ 100%|