title: Bacteriology of the freshwater environment: implications for clinical therapy.
abstract: Water and animal tissue samples were obtained from sources in Tennessee, California, and Florida. Purified bacterial colonies were isolated and organisms identified. Fifty-eight isolates were recovered. Twenty-seven Gram-negative isolates were identified. Gram-positive organisms were of the coryneform group or Bacillus species. Antibiotic susceptibility testing showed that Aeromonas species were relatively resistant to a wide variety of antimicrobials, which included trimethoprim, cefazolin, and ampicillin. Antibiotics effective against more than 90% of Gram-negative isolates included ciprofloxacin, imipenem, ceftazidime, and trimethoprim-sulfamethoxazole. Freshwater Gram-positive organisms did not display any unexpected susceptibility features. Recommendation for treatment are based on sensitivity in culture and the potentially serious nature of infections caused by Aeromonas species.
mesh_terms: D000818:Animals; D000900:Anti-Bacterial Agents / Q000494:pharmacology; D002140:California; D004866:Equipment Contamination; D005399:Fishes / Q000382:microbiology; D005431:Florida; D005618:Fresh Water; D006090:Gram-Negative Bacteria / Q000187:drug effects / Q000302:isolation & purification; D006094:Gram-Positive Bacteria / Q000187:drug effects / Q000302:isolation & purification; D006801:Humans; D008826:Microbial Sensitivity Tests; D013714:Tennessee; D014867:Water; D014871:Water Microbiology
chemical_list: D000900:Anti-Bacterial Agents; D014867:Water