RT Journal Article SR Electronic T1 Evaluation of ten commercial blood culture systems to isolate a pyridoxal-dependent streptococcus. JF Journal of Clinical Pathology JO J Clin Pathol FD BMJ Publishing Group Ltd and Association of Clinical Pathologists SP 930 OP 934 DO 10.1136/jcp.34.8.930 VO 34 IS 8 A1 G S Tillotson YR 1981 UL http://jcp.bmj.com/content/34/8/930.abstract AB This study evaluated the ability of ten commercial blood cultures to support the growth of a nutritional variant Streptococcus mitior (pyridoxal-dependent). The abilities of two established and two new agar formulations are also reported. The dependable isolation of a fastidious streptococcus can best be obtained with fastidious anaerobe broth (FAB) (Lab M Ltd, Ford Lane, Salford) for blood cultures in conjunction with one of the new media. FAB agar with the addition of heated blood was found to support the growth of pyridoxal-dependent Strep mitior and other fastidious organisms.