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  • Title: Management factors affecting the risk for vesicular stomatitis in livestock operations in the western United States.
    Author: Hurd HS, McCluskey BJ, Mumford EL.
    Journal: J Am Vet Med Assoc; 1999 Nov 01; 215(9):1263-8. PubMed ID: 10553436.
    Abstract:
    OBJECTIVE: To identify management factors affecting the risk of animals developing vesicular stomatitis (VS). DESIGN: Case-control study. ANIMALS: Horses, cattle, and sheep with suspected vesicular stomatitis on 395 premises in Colorado, New Mexico, Utah, and Arizona. PROCEDURE: Data were collected during the VS outbreak of 1997. Diagnosticians interviewed livestock owners and completed a supplemental questionnaire. Cases were defined as those premises that had a completed questionnaire and had > or = 1 animal positive for VS. Control premises were all premises investigated that had a completed questionnaire and on which the animals had been tested but VS was not detected. RESULTS: Animals that had access to a shelter or barn had a reduced risk of developing VS (OR, 0.6; 95% confidence interval [CI], 0.35 to 0.99). This effect was more pronounced for equine premises (OR, 0.5; 95% CI, 0.3 to 0.9). Conversely, during an adjusted analysis on equine premises, risk of developing disease was increased slightly where animals had access to pasture (OR, 2.01; 95% CI, 1.1 to 3.7). On all premises where owners reported insect populations were greater than normal, odds of developing disease were significantly increased (OR, 2.5; 95% CI, 1.47 to 4.47). Premises with animals housed < 0.25 miles from running water were more than twice as likely to have clinical signs of VS (OR, 2.6; 95% CI, 1.32 to 5.0). CONCLUSIONS AND CLINICAL RELEVANCE: These results support reports of others that suggest biting insects are a vector in VS virus transmission. Management practices to reduce exposure to biting insects might reduce the risk of VS.
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