Herd-level risk factors associated with fecal shedding of Shiga toxin-encoding bacteria on dairy farms in Minnesota, USA

Seongbeom Cho, Charles P. Fossler, Francisco Diez-Gonzalez, Scott J. Wells, Craig W. Hedberg, John B. Kaneene, Pamela L. Ruegg, Lorin D. Warnick, Jeffrey B. Bender

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Abstract

This study aimed to identify herd-level risk factors associated with fecal shedding of Shiga toxinencoding bacteria (STB) on dairy cattle farms in Minnesota, USA. After adjustment for farm size, risk factors included: use of total mixed ration (TMR) for lactating dairy cows [odds ratio (OR) = 3.0; 95% confidence interval (CI):1.8 to 5.1], no use of monensin for weaned calves (OR = 4.8, 95% CI: 2.5, 9.3), and no use of decoquinate for preweaned calves (OR = 2.2, 95% CI: 1.4, 3.6). Fecal shedding of STB was more common in small herds (< 100 cows, OR = 3.6, 95% CI: 2.1, 6.2) than in large herds (≥ 100 cows). Herd management factors related to cattle feeding practices were associated with fecal shedding of STB.

Original languageEnglish (US)
Pages (from-to)693-697
Number of pages5
JournalCanadian Veterinary Journal
Volume54
Issue number7
StatePublished - Jul 1 2013

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