Beta-haemolytic bacitracin sensitive strains of Streptococcus salivarius: A source of confusion with Streptococcus pyogenes in throat swab cultures

Tapsall, John W.; Chau, Christine

doi:10.3109/00313028009077103

Pathology

1980

DOI: 10.3109/00313028009077103

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Beta-haemolytic bacitracin sensitive strains of Streptococcus salivarius: A source of confusion with Streptococcus pyogenes in throat swab cultures

John W. Tapsall

Christine Chau

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1983

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Cited by 3 publications

(1 citation statement)

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“…Some references have pointed out that group A streptococci do not usually grow in bile, 7 and this is used in vitro to differentiate these organisms from enteric streptococci. It should be noted, however, that this property is also shared by group C, G and viridans streptococci.…”

mentioning

confidence: 99%

Streptococcus pyogenes bacteremia in the setting of cholangitis

Dakdouki

Kanafani

Mourad

et al. 2004

International Journal of Infectious Diseases

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mentioning

confidence: 99%

Streptococcus pyogenes bacteremia in the setting of cholangitis

Dakdouki

Kanafani

Mourad

et al. 2004

International Journal of Infectious Diseases

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Virulence of β-hemolytic and non-hemolytic Streptococcus mutans: lethal dose determinations in neonatal mice

Woltjes

Graaff

1983

Antonie van Leeuwenhoek

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The virulence of beta-hemolytic and non-hemolytic strains of Streptococcus mutans was studied in neonatal mice by LD50 determinations after intracerebral injection of the bacteria. Although the differences in LD50 values are small the results may indicate that beta-hemolytic S. mutans strains (mean LD50 of 6.3 X 10(7) c.f.u.) were more virulent than non-hemolytic S. mutans strains (mean LD50 of 47.7 X 10(7) c.f.u.). The LD50 values of other viridans streptococci varied between 4.8 and 10(7) c.f.u. Strains of S. pyogenes and S. agalactiae were highly virulent in this animal model with LD50 values lower than 10(5) c.f.u.

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Bacteriocin-like Inhibitory Activity Associated with Beta-hemolytic Strains of Streptococcus salivarius

Tompkins

Tagg

1987

J Dent Res

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Seven beta-hemolytic Streptococcus salivarius isolates produced bacteriocin-like inhibitory activity in deferred antagonism tests using a set of nine indicator bacteria (I1-I9). Five of these S. salivarius strains (KWF, TOVE-R, K17, K21, and K26) were inhibitory to indicators I2, I5, I6, and I7. Mutated non-hemolytic derivatives showed concomitant loss of inhibitory activity against I2, I5, and I6, but retained activity against I7. Inhibitory activity against I2, I5, and I6 was restored in beta-hemolytic revertants of such mutants. Strain 3638 was inhibitory to all of the indicator organisms except I3, and this pattern of inhibitory activity was retained by non-hemolytic derivatives. It appeared that strain 3638 produced an additional broadly-active inhibitory agent, since a mutant (strain 3638A), which was apparently defective in the production of this inhibitor, retained both the beta-hemolytic and I2-, I5-, I6-, and I7-inhibitory activities. Non-hemolytic derivatives of strain 3638A were inhibitory only to I7. Strain 3638, therefore, appeared to produce at least three inhibitory agents: one active only on I7; another acting on I2, I5, and I6 (and associated with beta-hemolytic activity); and a third apparently active on all of the indicators other than I3. S. salivarius strain JH inhibited all nine indicator strains and possessed a beta-hemolytic character which differed from that of the other strains in being readily eliminated on treatment with the plasmid-curing agent novobiocin. Non-hemolytic derivatives of JH retained inhibitory activity against the complete set of indicators.(ABSTRACT TRUNCATED AT 250 WORDS)

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Beta-haemolytic bacitracin sensitive strains of Streptococcus salivarius: A source of confusion with Streptococcus pyogenes in throat swab cultures

Cited by 3 publications

References 8 publications

Streptococcus pyogenes bacteremia in the setting of cholangitis

Streptococcus pyogenes bacteremia in the setting of cholangitis

Virulence of β-hemolytic and non-hemolytic Streptococcus mutans: lethal dose determinations in neonatal mice

Bacteriocin-like Inhibitory Activity Associated with Beta-hemolytic Strains of Streptococcus salivarius

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