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Full: http://www.hindawi.com/journals/vmi/2012/674085/
Estimated Prevalence of Caprine Paratuberculosis in Boer Goat Herds in Missouri, USA
Patrick Pithua and Nathaniel S. Kollias
November 2012
Department of Veterinary Medicine and Surgery, University of Missouri, USA
Paratuberculosis (PTB) is a progressive, debilitating, and production limiting disease of ruminants caused by Mycobacterium avium subsp. paratuberculosis (MAP) infection. Paratuberculosis is recognized worldwide as one of the most economically important food animal diseases affecting cattle, sheep, and goats. Recognized herd losses attributable to PTB include increased mortality and premature culling risks, lower reproductive efficiency, compromised growth rates, and decreased milk yield [1–4].
Although MAP’s zoonotic potential is a subject of debate, [5, 6] the organism’s ability to contaminate milk [7] plus its frequent detection in patients with Crohn’s disease [8, 9] raises concern for a potential public health hazard.
The objective of this study was to estimate true animal-level and herd-level prevalence of Mycobacterium avium subsp. paratuberculosis (MAP) antibodies in Missouri Boer goat herds. Sera harvested from blood samples collected from goats ≥24 months of age in 25 Missouri Boer goat herds were tested for presence of MAP antibodies using a commercial ELISA kit. Herds were declared positive for MAP if one or more goats in the herd tested positive for MAP antibodies. True animal, within-herd, and between-herd prevalences were calculated using the Rogan-Gladen estimator and were 1.4% (95% CI = 0.1 to 3.6%), 3% (95% CI = 0 to 6%), and 54.7% (95% CI = 28.2 to 86.2%), respectively.
With an estimated meat goat population of approximately 37,151 head [27] in the state, it is likely that 520 (95% CI = 37 to 1337) of Missouri’s goat population is infected with MAP.
Findings in this study confirmed that MAP infection is endemic in Missouri Boer goat herds.
Estimated Prevalence of Caprine Paratuberculosis in Boer Goat Herds in Missouri, USA
Patrick Pithua and Nathaniel S. Kollias
November 2012
Department of Veterinary Medicine and Surgery, University of Missouri, USA
Paratuberculosis (PTB) is a progressive, debilitating, and production limiting disease of ruminants caused by Mycobacterium avium subsp. paratuberculosis (MAP) infection. Paratuberculosis is recognized worldwide as one of the most economically important food animal diseases affecting cattle, sheep, and goats. Recognized herd losses attributable to PTB include increased mortality and premature culling risks, lower reproductive efficiency, compromised growth rates, and decreased milk yield [1–4].
Although MAP’s zoonotic potential is a subject of debate, [5, 6] the organism’s ability to contaminate milk [7] plus its frequent detection in patients with Crohn’s disease [8, 9] raises concern for a potential public health hazard.
The objective of this study was to estimate true animal-level and herd-level prevalence of Mycobacterium avium subsp. paratuberculosis (MAP) antibodies in Missouri Boer goat herds. Sera harvested from blood samples collected from goats ≥24 months of age in 25 Missouri Boer goat herds were tested for presence of MAP antibodies using a commercial ELISA kit. Herds were declared positive for MAP if one or more goats in the herd tested positive for MAP antibodies. True animal, within-herd, and between-herd prevalences were calculated using the Rogan-Gladen estimator and were 1.4% (95% CI = 0.1 to 3.6%), 3% (95% CI = 0 to 6%), and 54.7% (95% CI = 28.2 to 86.2%), respectively.
With an estimated meat goat population of approximately 37,151 head [27] in the state, it is likely that 520 (95% CI = 37 to 1337) of Missouri’s goat population is infected with MAP.
Findings in this study confirmed that MAP infection is endemic in Missouri Boer goat herds.
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