a total of 2,445 gram-negative bacteria belonging to fecal coliform , pseudomonas , moraxella , acinetobacter , and flavobacterium-cytophaga groups were isolated from the rivers and bay of tillamook , oregon , and their resistances to chloramphenicol ( 25 microgram/ml ) , streptomycin ( 10 microgram/ml ) , ampicillin ( 10 microgram/ml ) , tetracycline ( 25 microgram/ml ) , chlortetracycline ( 25 microgram/ml ) , oxytetracycline ( 25 microgram/ml ) , neomycin ( 50 microgram/ml ) , nitrofurazone ( 12.5 microgram/ml ) , nalidixic acid ( 25 microgram/ml ) , kanamycin ( 25 microgram/ml ) , and penicillin g ( 10 iu/ml ) were determined .
C0002680
ampicillin
C0030827
penicillin g