DRUG RESISTANCE AND PLASMID MEDIATED TRANSFER OF DRUG RESISTANCE IN ESCHERICHIA COLI ISOLATED FROM VARIOUS DISTRICTS OF THE HUMAN ORGANISM. A POSSIBLE RELATIONSHIP WITH THE ANTIMICROBIAL DRUG CONCENTRATIONS DURING THERAPY.GUARDA MA; LANDINI MP; LA PLACA M et al.1977; BOLL. IST. SIEROTERAP. MILAN.; ITAL.; DA. 1977; VOL. 56; NO 5; PP. 432-436; ABS. ITAL.; BIBL. 13 REF.Article

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