CNS mastitis: Nothing to worry about?

Technical note: A pilot study using a mouse mastitis model to study differences between bovine associated coagulase-negative staphylococci

“…Until recently, it was difficult to draw consistent conclusions on the relevance of CNS for bovine udder health. Some studies considered CNS as true mastitis pathogens, although most were retrieved from subclinical mastitis cases , whereas others considered CNS to be commensal bacteria with limited or absent negative effects on SCC, milk quality, and milk production (Schukken et al, 2009;De Vliegher et al, 2012). The development and validation of molecular identification techniques specifically for bovine-associated CNS were the basis to eliminate this confusion (Zadoks and Watts, 2009).…”

“…The development and validation of molecular identification techniques specifically for bovine-associated CNS were the basis to eliminate this confusion (Zadoks and Watts, 2009). Whereas older studies dealt with CNS as one homogenous and coherent group (Schukken et al, 2009;Piepers et al, 2010;Piepers et al, 2013), more recent studies addressed the CNS species separately, revealing heterogeneous characteristics between them (Avall-Jääskeläinen et al, 2013). In essence, 12 CNS species are frequently isolated from bovine milk.…”

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

“…Species of the CNS group are commonly found in bovine milk samples (Tenhagen et al, 2006;Schukken et al, 2009;Thorberg et al, 2009). Subclinical IMI caused by CNS are highly prevalent in European dairy herds (Roesch et al, 2007;Sampimon et al, 2009;Rüegsegger et al, 2014), including herds with a high bulk milk SCC (Piepers et al, 2007).…”

Evaluation of minor pathogen intramammary infection, susceptibility parameters, and somatic cell counts on the development of new intramammary infections with major mastitis pathogens

“…Mastitis caused by CNS is typically a mild, subclinical reaction (Schukken et al, 2009) that is most commonly associated with increased milk SCC. Coagulase-negative staphylococci IMI have been associated both with decreased milk production (Green et al, 2006) and with slight but significant increased production Schukken et al, 2009;Piepers et al, 2010). Similarly, infection with Corynebacterium spp.…”