Isolation of Staphylococcus aureus from Sites Other than the Lactating Mammary Gland

Matos, J. S. T.; White, D.G.; Harmon, Robert J.; Langlois, B. E.

doi:10.3168/jds.s0022-0302(91)78315-x

Cited by 68 publications

(63 citation statements)

References 13 publications

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“…In addition, contact with a contaminated environment has been suggested (174). Such environment could also include the air, as studies have shown that air in pig and cow stables may contain considerable amounts of (antimicrobial resistant) bacteria (191,192).…”

Section: La-mrsa In Humansmentioning

confidence: 99%

Methicillin-resistantStaphylococcus aureus(MRSA) in food production animals

et al. 2010

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SummaryUntil recently, reports on MRSA in livestock were mainly limited to occasional detections in dairy cattle mastitis. Since 2005 however, studies show the existence of an MRSA clone, CC398, which has been reported colonizing pigs, veal calves and broiler chickens and infecting dairy cows. Many aspects of its prevalence in pigs are not yet understood. In other livestock, colonizing capacity and reservoir status are still unclear.. MRSA CC398 has also been detected in meat but, like for other MRSA, the risk this might pose is rather unclear. For now, the most worrying aspect of MRSA CC398 seems to be its capacity to spread to humans. This might complicate MRSA control measures in human healthcare, posing for urgent research into risk factors and transmission routes. Overall, infections with MRSA CC398 are much less reported than carriage. More investigation into its pathogenic potential is though required. Also the origin and evolution of this clone remain to be revealed.3

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Section: La-mrsa In Humansmentioning

confidence: 99%

Methicillin-resistantStaphylococcus aureus(MRSA) in food production animals

et al. 2010

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“…xylosus, the months June to November and June to August, respectively, were associated with higher odds for IMI, similar to the results of De Visscher et al (2017) who found an increased risk for presence of more relevant species in bulk tank milk in June and September. Because both species are frequently found in the cow's environment (Matos et al, 1991;Piessens et al, 2011), these associations might be caused by a high environmental bacterial pressure caused by warm weather conditions in summer and early autumn. In contrast, the months from September to February were associated with higher odds for Staph.…”

Section: Variance Componentsmentioning

confidence: 99%

Quarter- and cow-level risk factors for intramammary infection with coagulase-negative staphylococci species in Swiss dairy cows

Dolder

Borne

Traversari

et al. 2017

Journal of Dairy Science

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Bacteriological status, evaluation of udder symmetry, udder hygiene, and teat end scores of 92 dairy cows were assessed on 3 Swiss dairy farms in a longitudinal 1-yr study to determine risk factors for intramammary infection (IMI) with coagulase-negative staphylococci (CNS) species. Farm visits were performed monthly including sterile quarter milk sampling and udder evaluation of all lactating cows. Milk samples were evaluated for the presence of staphylococci using selective agar plates. Species identification was performed using MALDI-TOF mass spectrometry. Intramammary infection was defined as milk samples having ≥100 cfu per mL of milk according to culture results. Overall, 3,151 quarter samples were included in the statistical analysis. Staphylococcus chromogenes, Staphylococcus haemolyticus, Staphylococcus xylosus, and a Staphylococcus warneri-like species were the 4 most prevalent CNS species found. Hierarchical multivariable logistic regression models were built to evaluate risk factors for species-specific CNS IMI. Risk factors for Staph. chromogenes IMI were presence in herd B, the period from June 2014 to August 2014 and December 2014 to February 2015, and presence of udder edema. For Staph. haemolyticus, the relevant risk factor included coinfection with Staph. xylosus coinfection with other than the above-mentioned CNS species ("others") and the period from June 2014 to November 2014. Coinfection with Staph. haemolyticus and "others," the periods from June 2014 to August 2014 and December 2014 to February 2015, early phase of lactation (1-60 d in milk), and belonging to herd B were significantly associated with Staph. xylosus IMI. Mid and late lactation, coinfection with Staph. xylosus, and the period September 2014 to May 2015 were identified as significant risk factors for Staph. warneri-like IMI. For Staph. chromogenes, 60.6 and 26% of the variance was observed at the quarter and cow level, respectively, whereas for the other investigated species the highest variance was observed at the sample level. The predominant species within herds differed and was most pronounced for the Staph. warneri-like species.

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“…However, S. aureus can persist for long periods in other body sites including the vagina, teat and skin lesions, the nares, and infected tonsils of cows [2]. Staphylococcus aureus intramammary infections in nulliparous heifers have also been reported [3] indicating that sources other than the lactating cow may serve as reservoirs of S. aureus in the dairy herd.…”

Section: Introductionmentioning

confidence: 99%