PMID: 6636511Aug 1, 1983

Encapsulation of Staphylococcus aureus isolated from bovine milk

Veterinary Microbiology
N L Norcross, J P Opdebeeck


Evidence is presented that nearly all Staphylococcus aureus infections of the bovine mammary gland are by encapsulated organisms (94% of isolates examined). This observation is based on the demonstration of diffuse growth in serum-soft agar, of cultures taken directly from mastitic milk without subculture on artificial media. Only milks containing pure cultures of S. aureus were examined. It was previously reported that only 6% had capsules. Evidence is presented that as few as 3 or 4 subcultures and/or a short storage on artificial media results in loss of encapsulation of most S. aureus of bovine origin. Antisera raised against encapsulate strains inhibit the expression of capsule formation on bacteria that are encapsulated in the presence of normal serum.


Dec 1, 1987·Veterinary Immunology and Immunopathology·D L Watson
Mar 1, 1991·The Journal of Applied Bacteriology·K R MatthewsS H King
Aug 1, 1991·Zentralblatt für Veterinärmedizin. Reihe B. Journal of veterinary medicine. Series B·W MamoP Jonsson
Jul 1, 1994·Zentralblatt für Veterinärmedizin. Reihe B. Journal of veterinary medicine. Series B·L F Calvinho, K Dodd
Jan 1, 1992·Research in Veterinary Science·R T GreeneM Schmitt
Jul 1, 1991·The Journal of Applied Bacteriology·K R MatthewsA J Guidry
May 1, 1985·Australian Veterinary Journal·I G Colditz, D L Watson
Jan 1, 1988·APMIS : Acta Pathologica, Microbiologica, Et Immunologica Scandinavica·B Johne, J Jarp
May 1, 1997·Journal of Dairy Science·J A GiraudoR Nagel
Oct 1, 1991·Journal of Dairy Science·A J GuidryL M Berning
Dec 1, 1991·Journal of Dairy Science·E R Oldham, M J Daley
Aug 24, 2001·Journal of Dairy Science·C N O'BrienD C Westhoff
Jul 15, 1989·FEMS Microbiology Letters·B Grinde
Dec 1, 1992·Zentralblatt für Veterinärmedizin. Reihe B. Journal of veterinary medicine. Series B·V MyllysT Ali-Vehmas


Feb 1, 1979·The Journal of Applied Bacteriology·K YoshidaC L San Clemente
Oct 1, 1979·The Journal of Applied Bacteriology·K Yoshida, Y Minegishi
Jul 31, 1974·Annals of the New York Academy of Sciences·B B Wiley, N H Maverakis
Nov 1, 1967·The Journal of Experimental Medicine·B LipińskiJ Jeljaszewicz

Related Concepts

Microbial Subculture
Microbial Anatomical Capsule Structure
Mammary Gland
Thylacodes aureus
Immune Sera
Bos taurus
Polysaccharides, Bacterial
Styrax aureus
Electron Microscopy

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