AI Article Synopsis
- Over 200 coagulase-positive Staphylococcus aureus strains from animals were analyzed using specific typing phages designed for both cattle and humans.
- A high percentage (78.5-90.0%) of these S. aureus strains from swine, cows, and chickens could be classified by these phages, indicating that strains from the same biotype often displayed similar sensitivities to the phages.
- S. intermedius strains displayed complete resistance to the phages, supporting its classification as a separate species of coagulase-positive staphylococci.
Article Abstract
More than 200 coagulase-positive strains of animal origin have been studied by means of Staphylococcus aureus typing phages, belonging to two international sets and intended for typing staphylococci isolated from large cattle and humans, and experimental "chicken" phage A 1591. Among S. aureus strains the cultures isolated from swine, cows, chickens, and belonging to biotypes B1, C1, B2, respectively, have been mostly (in 78.5-90.0% of cases) determined by phage typing. The strains belonging to one biotype have proved to be sensitive predominantly to the same phages. In this connection further differentiation of staphylococci within individual biotypes by means of the phages used in these experiments seems to be impracticable. S. intermedius strains have been found to be completely resistant to the above phages, which confirms that S. intermedius is rightly considered to be an independent species of coagulase-positive staphylococci.
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