[Bacteriocinogenic properties of Staphylococci isolated from the oral cavity].
Two hundred ninety two staphylococcal strains were isolated out of 130 saliva samples taken from children and adults, among which 116 were coagulase-positive and 176 coagulase negative. Bacteriocinogenic activity against Staphylococcus aureus strain Oxford 209P was found in 13 (4.5%) of the strains only. On the other hand, when a set of 15 sensitive staphylococcal strains selected by cross checking was used for the study 260 (89.0%) strains were found to be bacteriocinogenic. It was found that a higher percentage of coagulase-positive staphylococcal strains is sensitive to staphylococcins than of coagulase-negative strains. However, mean zone of inhibition is smaller in the case of former than of the latter strains. It was shown, that in the case of active strains a positive correlation exists between a percentage of coagulase-positive and negative strains inhibited by them and also between a percentage of all inhibited strains and a mean diameter if the growth inhibition zone. Simultaneous occurrence in saliva of two or more staphylococcal strains was found in 106 persons examined. In 93.4% of those cases coexisting strains did not show antagonistic properties: in remaining 6.6% despite of the number of simultaneously existing strains in oral cavity only one strain showed antagonistic properties against the remaining strains.
Raczyńska
A
A
D000328:Adult; D000898:Antibiosis / Q000502:physiology*; D001430:Bacteriocins / Q000096:biosynthesis*; D002648:Child; D003030:Coagulase / Q000096:biosynthesis; D006801:Humans; D066298:In Vitro Techniques; D012463:Saliva / Q000382:microbiology*; D013210:Staphylococcus / Q000502:physiology*; D013211:Staphylococcus aureus / Q000254:growth & development*
D001430:Bacteriocins; D003030:Coagulase
Bakteriocynogenne właściwości gronkowców izolowanych z jamy ustnej.