PMID- 4597708 OWN - NLM STAT- MEDLINE DCOM- 19740718 LR - 20210526 IS - 0066-4804 (Print) IS - 1098-6596 (Electronic) IS - 0066-4804 (Linking) VI - 3 IP - 1 DP - 1973 Jan TI - Susceptibility of Nocardia asteroides to 45 antimicrobial agents in vitro. PG - 1-8 AB - A method for preparing uniformly dispersed cultures of Nocardia asteroides for use in tests for susceptibility to antimicrobial agents is described. The minimal inhibiting concentration (MIC) of 45 agents for cultures thus prepared was determined with the use of a replica-inoculating apparatus. Minocycline at a concentration of 3.1 mug or less/ml inhibited 90% of the strains tested, and all were inhibited by 6.3 mug/ml. An erythromycin concentration of 0.8 mug or less/ml inhibited 40% of the strains, but the MIC for most of the others was > 100 mug/ml. The other agents were generally less active. Chemically related analogues varied in activity to different degrees. Also, the MIC of each antibiotic against different strains generally varied over a wide range. Sulfonamides and trimethoprim were not active against most strains in the method used. The size of the inoculum markedly affected the MIC of sulfonamides and had variable effects on other agents. Marked synergy of erythromycin with ampicillin was demonstrated for nearly all strains tested. FAU - Bach, M C AU - Bach MC FAU - Sabath, L D AU - Sabath LD FAU - Finland, M AU - Finland M LA - eng PT - Journal Article PL - United States TA - Antimicrob Agents Chemother JT - Antimicrobial agents and chemotherapy JID - 0315061 RN - 0 (Anti-Bacterial Agents) SB - IM MH - Anti-Bacterial Agents/*pharmacology MH - Drug Synergism MH - Microbial Sensitivity Tests MH - Nocardia asteroides/*drug effects PMC - PMC444351 EDAT- 1973/01/01 00:00 MHDA- 1973/01/01 00:01 PMCR- 1973/01/01 CRDT- 1973/01/01 00:00 PHST- 1973/01/01 00:00 [pubmed] PHST- 1973/01/01 00:01 [medline] PHST- 1973/01/01 00:00 [entrez] PHST- 1973/01/01 00:00 [pmc-release] AID - 10.1128/AAC.3.1.1 [doi] PST - ppublish SO - Antimicrob Agents Chemother. 1973 Jan;3(1):1-8. doi: 10.1128/AAC.3.1.1.