title: Occurrence of multiple antibiotic resistance in Azotobacter chroococcum.
abstract: Of 117 strains of Azotobacter chroococcum, isolated from local soils the antibiotic resistance pattern to ten widely used antibiotics was determined by antibiotic disk and agar plate dilution method. Over 95% of the strains were resistant to 10 micrograms ml-1 concentration of ampicillin, chloramphenicol, erythromycin and tetracycline and 70% or more were resistant to kanamycin, nalidixic acid, rifampicin, streptomycin and trimethoprim. 1 to 8% of the strains showed resistance upto 400 micrograms ml-1 concentration of 5 antibiotics (ampicillin, chloramphenicol, kanamycin, streptomycin and tetracycline). The intrinsic resistance to the 10 antibiotics was generally high in Azotobacter chroococcum strains.
authors.affiliation: Department of Microbiology, Haryana Agricultural University, Hissar, India.
authors.forename: S S
authors.initials: SS
authors.lastname: Sindhu
authors.forename: V
authors.initials: V
authors.lastname: Grover
authors.forename: N
authors.initials: N
authors.lastname: Narula
authors.forename: K
authors.initials: K
authors.lastname: Lakshminarayana
mesh_terms: D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D001395:Azotobacter / Q000187:drug effects*; D004352:Drug Resistance, Microbial; D003368:Gossypium; D008826:Microbial Sensitivity Tests; D008897:Panicum; D012988:Soil Microbiology; D014908:Triticum
chemical_list: D000900:Anti-Bacterial Agents