Encapsulation of Staphylococcus aureus isolated from bovine milk
| Autor: | N.L. Norcross, J.P. Opdebeeck |
|---|---|
| Rok vydání: | 1983 |
| Předmět: |
Staphylococcus aureus
Bovine milk food.ingredient Mammary gland Normal serum medicine.disease_cause Microbiology food medicine Animals Agar Antiserum General Veterinary biology Polysaccharides Bacterial General Medicine biology.organism_classification Antibodies Bacterial Microscopy Electron Milk medicine.anatomical_structure Cattle Female Staphylococcus aureus infections Bacteria |
| Zdroj: | Veterinary Microbiology. 8:397-404 |
| ISSN: | 0378-1135 |
| DOI: | 10.1016/0378-1135(83)90052-4 |
| Popis: | 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 encapsulated strains inhibit the expression of capsule formation on bacteria that are encapsulated in the presence of normal serum. |
| Databáze: | OpenAIRE |
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