PMID- 9301995 OWN - NLM STAT- MEDLINE DCOM- 19971030 LR - 20190512 IS - 0305-7453 (Print) IS - 0305-7453 (Linking) VI - 40 IP - 2 DP - 1997 Aug TI - Comparative effects of clindamycin and ampicillin on superantigenic activity of Streptococcus pyogenes. PG - 275-7 AB - We have tested the ability of Streptococcus pyogenes to produce streptococcal pyrogenic exotoxin A (SPEA) and superantigenic activity in the presence of sub-inhibitory concentrations of ampicillin and clindamycin. After 6 h of culture, SPEA production by S. pyogenes was higher in broths containing ampicillin (715.7 +/- 296.4 pg/10(6) cfu) than in broths containing clindamycin (167.1 +/- 31.9 pg/10(6) cfu), a difference that was not significant (P = 0.25). Promitogenic activity of bacterial supernatants was also greater in ampicillin-treated cultures (467.5 +/- 17.2 ccpm/10(6) cfu) than in clindamycin-treated cultures (169.2 +/- 8.9 ccpm/10(6) cfu), a difference that was highly significant (P = 0.0001). The data support the use of clindamycin in the treatment of streptococcal toxic shock-like syndrome, in order to inhibit superantigen synthesis. FAU - Sriskandan, S AU - Sriskandan S AD - Department of Infectious Diseases, Royal Postgraduate Medical School, London, UK. FAU - McKee, A AU - McKee A FAU - Hall, L AU - Hall L FAU - Cohen, J AU - Cohen J LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - J Antimicrob Chemother JT - The Journal of antimicrobial chemotherapy JID - 7513617 RN - 0 (Anti-Bacterial Agents) RN - 0 (Antigens, Bacterial) RN - 0 (Bacterial Proteins) RN - 0 (Exotoxins) RN - 0 (Membrane Proteins) RN - 0 (Penicillins) RN - 0 (Pyrogens) RN - 0 (SpeA protein, Streptococcus pyogenes) RN - 0 (Superantigens) RN - 0 (erythrogenic toxin) RN - 3U02EL437C (Clindamycin) RN - 7C782967RD (Ampicillin) SB - IM MH - Ampicillin/*pharmacology MH - Anti-Bacterial Agents/*pharmacology MH - Antigens, Bacterial/*drug effects/metabolism MH - *Bacterial Proteins MH - Clindamycin/*pharmacology MH - Enzyme-Linked Immunosorbent Assay MH - Exotoxins/*metabolism MH - *Membrane Proteins MH - Penicillins/*pharmacology MH - Pyrogens/*metabolism MH - Streptococcus pyogenes/*drug effects/immunology/metabolism MH - Superantigens/drug effects/metabolism EDAT- 1997/08/01 00:00 MHDA- 1997/09/25 00:01 CRDT- 1997/08/01 00:00 PHST- 1997/08/01 00:00 [pubmed] PHST- 1997/09/25 00:01 [medline] PHST- 1997/08/01 00:00 [entrez] AID - 10.1093/jac/40.2.275 [doi] PST - ppublish SO - J Antimicrob Chemother. 1997 Aug;40(2):275-7. doi: 10.1093/jac/40.2.275.