Usefulness of pyridoxal-containing blood agar as a primary plating medium to enhance recovery of nutritionally deficient streptococci

Gill, Vee J.; Williams, Denise

doi:10.1016/0732-8893(88)90105-8

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Physiological and Taxonomic Studies Nutritional Requirements2

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1990

1992

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“…Two studies (31,61) suggest that early (within 48 h) subculture of bottles suspected of harboring NVS is required, since the viability of organisms begins to decrease with continued incubation. Gill and Williams (30) found that horse blood agar supplemented with pyridoxal was useful for recovery of NVS with the Dupont Isolator system.…”

Section: Physiological and Taxonomic Studies Nutritional Requirementsmentioning

confidence: 99%

Nutritionally variant streptococci.

Ruoff

1991

Clinical Microbiology Reviews

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Section: Physiological and Taxonomic Studies Nutritional Requirementsmentioning

confidence: 99%

Nutritionally variant streptococci.

Ruoff

1991

Clinical Microbiology Reviews

View full text Add to dashboard Cite

Section: Physiological and Taxonomic Studies Nutritional Requirementsmentioning

confidence: 99%

Nutritionally variant streptococci

1991

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Streptococci requiring either pyridoxal or L-cysteine for growth were first observed 30 years ago as organisms forming satellite colonies adjacent to colonies of "helper" bacteria. Although they were previously considered nutritional mutants of viridans streptococcal species, the nutritionally variant streptococci (NVS) are currently thought to belong to distinct species of the genus Streptococcus. NVS strains may display pleomorphic cellular morphologies, depending on their growth conditions, and are distinguished from most other streptococci by enzymatic and serological characteristics and the presence of a cell wall chromophore. NVS are found as normal inhabitants of the oral cavity, and in addition to their participation in endocarditis, they have been isolated from a wide range of clinical specimens. Endocarditis caused by NVS is often difficult to eradicate; combinations of penicillin and an aminoglycoside are recommended for treatment. The unique physiological features of the NVS contribute to the difficulties encountered in their recovery from clinical specimens and may play a role in the problems associated with successful treatment of NVS endocarditis.

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Verarbeitung von klinischen Materialien und Bedeutung der Erregerspektren von Krankheitsbildern für die Diagnostik

Werk¹

1990

Medizinische Bakteriologie Und Infektiologie

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Usefulness of pyridoxal-containing blood agar as a primary plating medium to enhance recovery of nutritionally deficient streptococci

Cited by 4 publications

References 4 publications

Nutritionally variant streptococci.

Nutritionally variant streptococci.

Nutritionally variant streptococci

Verarbeitung von klinischen Materialien und Bedeutung der Erregerspektren von Krankheitsbildern für die Diagnostik

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