[the effect of culture media on bacteriocin production in various strains of bacteria].some staphylococcus and enterococcus strains were used to investigate the effect of culture medium on bacteriocin production. staphylococcus cohnii sc7, staphylococcus sp. ztj 151, s. saprophyticus ss 877, enterococcus faecium ef1 and e. faecalis efg2 were isolated from the rumen wall and contents of lambs, calves and fallow deer, enterococcus gallinarum eg10 and e. avium ea12 were isolated from the caecum of japanese quail. the tested bacteria belong to producers with a wide antimicrobial effec ...19921297243
a quantitative study of enterotoxin production by sheep milk staphylococci.of 124 staphylococcal strains isolated from sheep milk, 78 produced enterotoxin a, b, c, or d when evaluated by an enzyme-linked immunosorbent assay. enterotoxins a and d, elaborated by 44 and 43 strains, respectively, showed the highest incidence. enterotoxin production by coagulase-negative strains (one staphylococcus cohnii, three s. epidermidis, five s. haemolyticus, and four s. xylosus) was detected. linear and logarithmic-logarithmic regressions of optical density on enterotoxin concentrat ...19883355142
[resistance to heavy metals in ruminal staphylococci].ruminal, coagulase-negative, urease and bacteriocin-like substances producing staphylococci were screened for their heavy metal ions and antibiotics resistance. all strains tested were resistant to disodium arsenate at a minimal inhibition concentration (mic > 5 g/l) and cadmium sulphate (mic > 4 g/l). mic = 50-60 mg/l was determined in eight staphylococci screened in mercury chloride resistance test (tab. i). silver nitrate resistance was detected in seven of the bacteria used (mic = 40-50 mg/l ...19948073587
the amino acid sequences and activities of synergistic hemolysins from staphylococcus cohnii.staphylococcus cohnii ssp. cohnii and s. cohnii ssp. urealyticus are a coagulase-negative staphylococci considered for a long time as unable to cause infections. this situation changed recently and pathogenic strains of these bacteria were isolated from hospital environments, patients and medical staff. most of the isolated strains were resistant to many antibiotics. the present work describes isolation and characterization of several synergistic peptide hemolysins produced by these bacteria and ...200818752624
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