Abstract
A survey was made on the bacteriocin-producing potential of lactic streptococci. Bacteriocin-like activities were isolated and partially purified from about 5% of the 280 strains investigated. The frequency of production varied from about 1% in Streptococcus lactis subsp. diacetylactis to 9 and 7.5% in S. lactis and Streptococcus cremoris, respectively. Eight strains of S. cremoris produced bacteriocins which, on the basis of heat stability at different pH values and inhibitory spectrum, could be divided into four types. From 54 S. lactis strains, 5 strains produced inhibitory substances, namely, three nisin-like antibiotics and two different bacteriocins. Only 1 of 93 S. lactis subsp. diacetylactis strains produced a bacteriocin which was very similar to bacteriocins of type I in S. cremoris. All of the bacteriocins that were partially purified by ammonium sulfate precipitation showed very limited inhibitory spectra. Most of the lactic streptococci and a few members of the genera Clostridium, Leuconostoc, and Pediococcus were inhibited. None of the bacteriocins acted on gram-negative bacteria. The bacteriocinogenic strains were also characterized on the basis of plasmid content. All strains possessed between one and nine plasmids ranging from 1 to 50 megadaltons.
Full text
PDF
Images in this article
Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Davey G. P., Richardson B. C. Purification and Some Properties of Diplococcin from Streptococcus cremoris 346. Appl Environ Microbiol. 1981 Jan;41(1):84–89. doi: 10.1128/aem.41.1.84-89.1981. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Dunny G. M., Clewell D. B. Transmissible toxin (hemolysin) plasmid in Streptococcus faecalis and its mobilization of a noninfectious drug resistance plasmid. J Bacteriol. 1975 Nov;124(2):784–790. doi: 10.1128/jb.124.2.784-790.1975. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Klaenhammer T. R., McKay L. L., Baldwin K. A. Improved lysis of group N streptococci for isolation and rapid characterization of plasmid deoxyribonucleic acid. Appl Environ Microbiol. 1978 Mar;35(3):592–600. doi: 10.1128/aem.35.3.592-600.1978. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Kozak W., Bardowski J., Dobrzański W. T. Lactostrepcins--acid bacteriocins produced by lactic streptococci. J Dairy Res. 1978 Jun;45(2):247–257. doi: 10.1017/s0022029900016423. [DOI] [PubMed] [Google Scholar]
- Kozar W., Rajchert-Trzpil M., Dobrzański W. T. The effect of proflavin, ethidium bromide and an elevated temperature on the appearance of nisin-negative clones in nisin-producing strains of Streptococcus lactis. J Gen Microbiol. 1974 Aug;83(2):295–302. doi: 10.1099/00221287-83-2-295. [DOI] [PubMed] [Google Scholar]
- Leblanc D. J., Lee L. N. Rapid screening procedure for detection of plasmids in streptococci. J Bacteriol. 1979 Dec;140(3):1112–1115. doi: 10.1128/jb.140.3.1112-1115.1979. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Oxford A. E. Diplococcin, an anti-bacterial protein elaborated by certain milk streptococci. Biochem J. 1944;38(2):178–182. doi: 10.1042/bj0380178. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Tagg J. R., Dajani A. S., Wannamaker L. W. Bacteriocins of gram-positive bacteria. Bacteriol Rev. 1976 Sep;40(3):722–756. doi: 10.1128/br.40.3.722-756.1976. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Terzaghi B. E., Sandine W. E. Improved medium for lactic streptococci and their bacteriophages. Appl Microbiol. 1975 Jun;29(6):807–813. doi: 10.1128/am.29.6.807-813.1975. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Wittenberger C. L., Beaman A. J., Lee L. N. Tween 80 effect on glucosyltransferase synthesis by Streptococcus salivarius. J Bacteriol. 1978 Jan;133(1):231–239. doi: 10.1128/jb.133.1.231-239.1978. [DOI] [PMC free article] [PubMed] [Google Scholar]