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  • Title: Evaluation of the in-vitro antibacterial activity of Sch 34343.
    Author: Adam C, Naples L, Weiss W, Sabatelli F, Hare R, Loebenberg D, Miller GH.
    Journal: J Antimicrob Chemother; 1985 Jun; 15 Suppl C():39-56. PubMed ID: 3875604.
    Abstract:
    The in-vitro activity (as measured by geometric mean MICs, mg/l) of Sch 34343 against aerobic and anaerobic bacteria was compared with that of 14 other selected beta-lactam antibiotics including aztreonam, latamoxef (moxalactam), ceftazidime and imipenem. Sch 34343 had good activity (less than 2 mg/l) against most Gram-negative aerobic bacteria whether or not they contained high levels of plasmid-mediated or chromosomally-mediated beta-lactamases. It was slightly less potent against strains of Morganella and Serratia (less than 4 mg/l) and inactive against Pseudomonas (greater than 64 mg/l). A very small inoculum effect was observed against strains containing beta-lactamases indicating stability. Unlike the third-generation cephalosporins, Sch 34343 had excellent activity (less than or equal to 0.18 mg/l) against staphylococci, comparable to that of imipenem and ampicillin. While Sch 34343 had equally good potency (0.17 mg/l) against penicillinase-positive staphylococci, it was inactive against methicillin-resistant staphylococci (greater than or equal to 35 mg/l). Sch 34343 also had good activity against streptococci. The most unusual aspect of the in-vitro activity was its activity against Bacteroides (including Bact. fragilis) and other anaerobes. Sch 34343 had mean MICs less than or equal to mg/l for all Bacteroides and Clostridium spp. tested except CI. difficile (3.4 mg/l).
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