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- Title
THE FREQUENCY OF THE TYPES OF HEMOLYSIS AND THE FREQUENCY OF COAGULASE POSITIVE AND COAGULASE NEGATIVE STRAINS ON THE BAIRD-PARKER MEDIUM OF STAPHYLOCOCULUI AUREUS.
- Authors
POPOVICI, Raluca; BALDEA, Corina
- Abstract
The chromogenic media are used mainly for the usual bacteriologic diagnosis, having as purpose the reducing of time and of the consumables used, by the classic methodology. The chromogenic media are used most frequently either for the diagnosis of S. aureus subsp. aureus, or for the differentiation of the resistant methicillin strains of S. aureus subsp. aureus (MRSA). Identification is made based on the morphotinctorial, cultural characteristics and of some tests of pathogenicity. For the epidemiologic purpose, the diagnosis is completed with phage types. On the smears of cultures you can see gram positive cocci with characteristic establishment, in bulk. On agar blood S. aureus produces characteristic colonies easily recognizable. They are colonies of S type, large, with diameter of 1-3 mm, round, bulged, smooth, with regular margins, hemolytic and pigmented. The young colonies are colorless. The pigmentation of the mature colonies is made in the presence of oxygen and at the room temperature. The most frequent pigment is the gold one (80%), followed by the white pigment and very rarely the citrine one
- Subjects
COAGULASE; METHICILLIN-resistant staphylococcus aureus; BACTERIOPHAGE typing; HEMOLYSIS &; hemolysins; METHICILLIN; AGAR
- Publication
Analele Universitatii din Oradea, Fascicula Ecotoxicologie, Zootehnie si Tehnologii în Industria Alimentara, 2022, Vol 21, Issue Part B, p173
- ISSN
1583-4301
- Publication type
Article