[Influence of antagonistic bacteria on quantity of staphylococci in the oral cavity].
The study was aimed at establishment whether antagonistic influence between physiological oral cavity bacterial flora and staphylococci do exist and whether they influence on quantity of staphylococci in oral cavity environment. In samples of saliva taken from group of 11-13 year old children and a group of adults of both sexes, determinations were performed regarding total number of bacteria, number and percentage of bacteria inhibiting in vitro growth of standard indicator strain Staphylococcus aureus Oxford 209P and total number and percentage of staphylococci (together coagulase-positive and/or coagulase-negative). It was found that in each saliva sample bacteria inhibiting the indicator strain are present and their mean percentage is significantly higher in children than in adults and amounts respectively 47.1 +/- 28.5 and 35.0 +/- 20.3 (p = 0.0316). Higher percentage of antagonistic bacteria in children is associated with lower percentage of staphylococci in bacterial flora of saliva. Statistical analysis has confirmed existence of negative correlation, both linear and ranking, between the number of antagonistic bacteria and percentage of staphylococci in the saliva. This correlation is more strongly expressed and significant in children than in adults and linear correlation coefficient of Pearson amounts respectively to r = 0.7521 (p < 0.0005) and r = 0.3325 (p < 0.05). These results indicate that antagonistic bacterial flora is a significant factor limiting quantity of staphylococcal population in human oral cavity, especially in children.
Krzemiński
Z
Z
Zakład Mikrobiologii Lekarskiej AM, Lodzi.
Raczyńska
A
A
D000293:Adolescent; D000328:Adult; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009055:Mouth / Q000382:microbiology*; D012016:Reference Values; D012463:Saliva / Q000382:microbiology; D013210:Staphylococcus / Q000254:growth & development*
Wpływ bakterii antagonistycznych na liczebność gronkowców w jamie ustnej.