Prevalence of Mycobacterium avium subsp. paratuberculosis in farmed red deer (Cervus elaphus) with grossly normal mesenteric lymph nodes
New Zealand Veterinary Journal, Volume 61, Issue 3, pp 147-152, May 2013
Publisher: Taylor and Francis
AIM: To estimate the prevalence of
METHODS: Mesenteric lymph node (MLN) samples (n = 251) were collected from 60 lines of deer presented at two slaughterhouses in the North and two in the South Island of New Zealand between October 2008 and January 2009 and cultured for
RESULTS: A national cluster-adjusted individual animal prevalence of 45 (95% CI = 30–60)% was estimated, with North and South Island prevalences of 29 (95% CI = 16–45)% and 51 (95% CI = 36–66)%, respectively. Line status was a strong predictor of infection in young deer (OR 7.1, 95% CI = 2.4–21.5), but not in older deer. Herd-level prevalence was 44 (95% CI = 24–64)% in the North Island and 67 (95% CI = 49–85)% in the South Island. Weighted adjustment resulted in a national herd-level prevalence estimate of 59 (95% CI = 41–78)%.
CONCLUSIONS: This study has provided a national baseline prevalence estimate for
KEY WORDS: Deer, Cervus elaphus, paratuberculosis, Johne's disease, Mycobacterium avium subsp. paratuberculosis, mesenteric lymph node, BACTEC culture, prevalence
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