PMID: 7337296Nov 1, 1981Paper

Influence of outdoor winter environment on the course of infectious bovine keratoconjunctivitis

American Journal of Veterinary Research
K E KopeckyT J McDonald

Abstract

The effect of environmental conditions on the onset, severity, and duration of Moraxella bovis infection and subsequent clinical disease was studied. Twelve calves were used; 6 were maintained under usual isolated experimental conditions (inside), and 6 were kept under normal feedlot conditions (outside) during the winter (-20 to +15 C). The cattle housed inside had a higher infection rate, a milder disease, and longer duration of infection than did the cattle kept out side. Seemingly, the stress of the cold weather caused a more severe disease of shorter duration.

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