Coagulase-negative staphylococci as cause of bovine mastitis—Not so different from Staphylococcus aureus?

Taponen, Suvi; Pyörälä, Satu

doi:10.1016/j.vetmic.2008.09.011

Cited by 207 publications

(189 citation statements)

References 75 publications

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“…This is in accordance with the results of the current study, in which CNS also prevailed in cows showing no clinical signs of the disease. In recent times, the significance of CNS as causative agents of bovine subclinical mastitis has been well recognised (Taponen and Pyorala 2009). Either coagulase-positive staphylococci (CPS) or environmental pathogens have been described as the second most prevalent mastitis pathogens (Awale et al 2012).…”

Section: Discussionmentioning

confidence: 99%

Prevalence of mastitis pathogens in milk from clinically healthy cows

Cervinkova¹,

Vlkova²,

Borodacova³

et al. 2013

Vet. Med. - Czech

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A total of 669 individual cow milk samples originating from asymptomatic cows from 16 dairy farms were examined for the presence of microorganisms with the potential to cause mastitis. Coagulase-negative staphylococci clearly predominated (53.5% positive samples) followed by streptococci and enterococci (both occurring in 16.1% samples). Among streptococci, so-called mastitis streptococci (S. uberis, S. dysgalactiae and S. agalactiae) prevailed (11.7% positive samples). Enterobacteriaceae were found in 10.0% samples, most of which (6.6% samples) were positive for Escherichia coli. Yeasts (mainly Candida spp.) were found in 8.2% samples. One of the major mastitis pathogens, Staphylococcus aureus subsp. aureus, was isolated from 9.0% of samples. S. aureus isolates were further characterised in terms of their capability to form biofilm, antimicrobial susceptibility and clonality (PFGE). All S. aureus isolates were capable of biofilm formation and were generally susceptible to the majority of tested antibiotics. The exception was ampicillin, resistance to which was observed in 27.7% isolates. Therefore, the relatively frequent occurrence of S. aureus could be attributed to persistent intramammary infections due to biofilm formation rather than low efficacy of particular antibiotics. PFGE analysis revealed clonal spread of certain S. aureus isolates within and between farms indicating that certain lineages of S. aureus mastitis strains are particularly successful.

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Section: Discussionmentioning

confidence: 99%

Prevalence of mastitis pathogens in milk from clinically healthy cows

Cervinkova¹,

Vlkova²,

Borodacova³

et al. 2013

Vet. Med. - Czech

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“…Staphylococci는 혈액 응고를 일으키는 효소인 coagulase를 생산하는 능력에 기초하여 Coagulase-positive Staphylococci(CPS)와 CNS로 나누어진다. Staphylococcus aureus는 대표적 CPS로서 일반적으로 S. aureus와 CNS 두 그룹으로 나눌 수 있다 (Pyörälä and Taponen, 2009a). 유방염 진단에서 S. aureus는 주요 병원균으로 잘 알려져 있지만, CNS는 보통 준임상적 또는 경증의 유방염만을 일으키기 때문에 종 수준으 로 식별되지 않고 하나의 그룹으로 취급하였다 (Pyörälä and Taponen, 2009a).…”

Section: Coagulase-negative Staphylococci(cns)는 환경성 유방염 주요unclassified

Detection and Characteristics of Coagulase-Negative Staphylococcus sp. isolated from Dairy Cattle Milk

Kim¹,

Kim²,

Ham³

et al. 2017

J. Milk Sci. Biotechnol.

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Mastitis is a common and serious infection of the mammary gland in dairy cattle and has a major economic impact on the production of milk and dairy products. Bacterial mastitis is caused by several pathogens and is most frequently associated with coagulase-negative staphylococci (CNS). Although CNS are typically associated with subclinical or mild mastitis, the importance of CNS has increased as these pathogens have emerged as predominant mastitis-related pathogens in many countries. CNS can cause persistent infections, resulting in increased milk somatic cell counts and thereby affecting milk quality and decreasing milk production. Globally, Staphylococcus chromogenes, S. epidermidis, and S. simulans are the predominant CNS species in dairy cattle mastitis. Antibacterial resistance of CNS varies with species, and most CNS are susceptible to vancomycin and resistant to penicillin and tetracycline. As the most frequently isolated CNS species, some strains of S. chromogenes exhibit phenotypic resistance to ampicillin, erythromycin, oxacillin, penicillin, and tetracycline. Some strains of S. epidermidis and S. haemolyticus are only susceptible to vancomycin and rifampicin. Therefore, more studies are needed to achieve the control and prevention of CNS as environmental pathogens.

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“…are the most frequent etiologic agent of buffaloes mastitis (Kapronezai et al, 2005;Cunha et al, 2006). These bacteria are transmitted especially during the milking and are very important to understand the epidemiology of bubaline mastitis (Taponen and Pyörälä, 2009). …”

mentioning

confidence: 99%

“…CNS becomes the most prevalent etiologic agent of udder infection in cattle in some countries. Although with middle clinical signs, these pathogens are more persistent in the udder, as well as associated to high economic losses by drop in milk quality and quantity (Taponen and Pyörälä, 2009). …”

mentioning

confidence: 99%