viridans streptococci


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viridans streptococci

[′vir·ə‚danz ¦strep·tə′käk·ē]
(microbiology)
A group of pathogenic and saprophytic streptococci including strains not causing beta hemolysis, although many cause alpha hemolysis, and none which elaborate a C substance.
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For polymicrobial cultures, the majority of the misses were coagulase-negative staphylococci and/or viridans streptococci with or without a non-BC-GP target.
of patients (%) GRAM-POSITIVE Streptococci 38 (23) viridans Streptococci 24 (15) Streptococcus bovis 1 (1) Streptococcus mitis 1 (1) Streptococcus intermedius 1 (1) Others 11 (7) Staphylococci 21 (13) Staphylococcus aureus 10 (6) Staphylococcus epidermidis 11 (7) Enterococcus faecalis 7 (4) GRAM-NEGATIVE Pseudomonas species * 3 (2) Enterobacter (+) 3 (2) Serratia 1 (1) No growtha 86 (54) * P.
From blood cultures evaluated with The BacT/ALERT and the BACTEC 9240 systems viridans streptococci were isolated.
of Isolates Aerobic and facultative Gram-positive cocci GABHS 22 Viridans streptococci 24 Streptococcus nonspeciated 6 Micrococcus species 9 Coagulase negative Staphylococcus 3 Staphylococcus aureus 2 Streptococcus mitis 1 Gram-negative cocci Neisseria species (nonpathogenic) 6 Gram-negative bacilli Eikenella species 2 Haemophilus parainfluenzae 2 Haemophilus influenzae (nontypeable) 1 Klebsiella pneumoniae 1 Gram-negative bacilli (nonlactose fermenter) 1 Gram-positive bacilli Corynebacterium species 4 Total number of aerobes 84 Anaerobic Anaerobic cocci Peptostreptococcus species 2 Gram-negative bacilli Prevotella species 8 Prevotella intermedia 2 Bacteroides species 2 Fusobacterium varium 2 Prevotella oralis 1 Total number of anaerobes 17
Viridans streptococci bacteremia in children with malignancy: relevance of species identification and penicillin susceptibility.
A total of 127 different bacterial species were identified, by far the most common being the viridans streptococci.
Peritoneal fluid culture grew Pantoea agglomerans, Stomatococcus species, Viridans streptococci, and Candida lusitaniae.
For example, when the procedure manual states that a bile solubility test is used to differentiate Streptococcus pneumoniae from viridans streptococci in sputum cultures, the results of that test should be recorded on the worksheet.
Infections with viridans streptococci predominated among cases of known etiology, and RHD was the most common underlying pathologic change.
Among those bacteria that are not inhibited by quinolones are viridans streptococci.
2) The main pathogens are Staphylococcus aureus, Viridans streptococci, and Enterococcus.
These four predictors were congestive heart failure, abnormal mental status, a blood culture positive for an organism other than the viridans streptococci, and presence of comorbid disease (a Charlson score of 2 or greater).