• Muhammad Tariq Khan
  • Syed Humayun Shah


Background: Urinary tract infection is a very common problem in adults as well as in children. There is always needfor the right antibiotic to be chosen for treatment. Methods: This study was conducted at Microbiology section inPathology department of Ayub Medical College, Abbottabad, Pakistan. In this study the aztreonam which is onlyeffective against gram negative bacilli has been compared with other conventionally used antibiotics, ampicillin,cotrimoxazole, minocycline, pipemedic acid, nalidixic acid, norfloxacin, ciprofloxacin, gentamicin and ceftriaxone.Results: Total gram negative isolates were 342. Out of this 76.6% (262) were E.coli. Klebsiella pneumoniae 14.3%(49), proteus species 5.2%(I8) and pseudomonas aeruginosa were 3.8% (13). The aztreonam showed 78% sensitivityagainst gram negative bacilli which is better than norfloxacin which showed 62.2% sensitivity.


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