Incidence of bacteriocinogeny among fresh isolates of Streptococcus mutans
1990; Canadian Science Publishing; Volume: 36; Issue: 7 Linguagem: Inglês
10.1139/m90-088
ISSN1480-3275
AutoresM. Parrot, M. -F. Dréan, L. Trahan, M. C. Lavoie,
Tópico(s)Biochemical Analysis and Sensing Techniques
ResumoAmong 139 Streptococcus mutans fresh isolates tested, using the deferred-antagonism test and Streptococcus sanguis Ny 101 as the indicator strain, we observed that the frequency of detection of inhibition zones was reduced by 19% (from 53 to 34%) when arginine (1%) was used in the overlay agar. Among pigmented strains, the frequency of mutacin-like production was 70%. The frequency with which inhibition zones were detected varied from 7 to 91%, depending on the indicator strain used. These results indicate that the ability to detect the presence of mutacin-like substances varies widely and is dependent to a great extent on the methodology used. Key words: mutacin, bacteriocin, antagonism, Streptococcus mutans, inhibitory substance.
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