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PubMed · 11393376

Management strategies to decrease the prevalence of mastitis caused by one strain of Staphylococcus aureus in a dairy herd.

J R Middleton·L K Fox·T H Smith
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Abstract

The dairy herd at Washington State University had an outbreak of mastitis caused by a single strain of Staphylococcus aureus. The outbreak strain, termed novel, could not be controlled with routine contagious mastitis pathogen control procedures (incidence, 3.4 infections/100 cow months; peak prevalence > 22%). Our objective was to implement mastitis control measures that would decrease the incidence and prevalence of intramammary infection (IMI) caused by S aureus in the herd. The following intervention strategies were successfully implemented: strict segregation of cattle with IMI caused by S aureus, intensified culling of cattle with multiple-quarter IMI caused by S aureus, and inducing cessation of lactation of infected quarters in single-mammary-quarter infected cattle. One year after implementation of these control measures, incidence of IMI caused by S aureus was 0.35 infections/100 cow months, and prevalence had decreased from 20 to 8%.

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AnimalsCattleCell CountDairyingDisease OutbreaksDisease Transmission, InfectiousFemaleInfection ControlMammary Glands, AnimalMastitis, BovineMilkPrevalenceStaphylococcal InfectionsStaphylococcus aureusJournal ArticleResearch Support, Non-U.S. Gov't

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J R Middleton, L K Fox, T H Smith. 2001-05-15. Management strategies to decrease the prevalence of mastitis caused by one strain of Staphylococcus aureus in a dairy herd.. https://doi.org/10.2460/javma.2001.218.1615

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