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16 Αυγ 2019 · Staphylococcus aureus causes one of the most common types of chronic mastitis. Though some cows may flare up with clinical mastitis (especially after calving), the infection is usually subclinical, causing elevated somatic cell counts (SCC) but no detectable changes in milk or the udder.
Most IMIs in calving heifers are caused by staphylococcal species other than S aureus, which have a high rate of spontaneous cure. However, under some herd conditions, a substantial portion of heifers have intractable infections, including those caused by S aureus (see gangrenous mastitis image). Potential sources include the milk they were fed ...
24 Μαρ 2022 · S. aureus spreads among cows during milking, requiring a cooperative approach to reduce dissemination to healthy animals [2]. Bovine isolates of S. aureus are also a leading cause of foodborne diseases with bulk tank and raw milk products important vehicles for bacterial transmission to humans [3].
1 Δεκ 2017 · More recently, a highly cited review about cow, pathogen, and treatment factors that contribute to therapeutic success of cows infected with Staph. aureus again emphasized that only selected animals will respond to antibiotic therapy (Barkema et al., 2006).
6 Μαΐ 2024 · Staphylococcus aureus and non-aureus staphylococci (NAS) cause mastitis in dairy cows. S. aureus is a major contagious mammary pathogen on the U.S. dairy farms and throughout the globe (5).
While about 20 to 30% of the human population carries S. aureus, the prevalence of S. aureus varies from host species to host species, and up to 90% of chickens, 42% of pigs, 29% of sheep, and between 14 and 35% of cows and heifers are carriers (11, 12).
Farms wishing to reduce the prevalence of staph aureus infection should develop a prevention and control strategy with their herd veterinarian. Cows with 3 negative culture results may be returned to the general population.
