results in general 438 urine isolates were obtained. e. coli was the most frequently occurring pathogen (54.80%), followed by klebsiella pneumoniae (16.0%), coagulase negative staphylococci (11.2%), enterobacter spp. (9.6%), proteus spp. 1.4% and p. aeruginosa (1.4%). resistance rates of e. coli isolates were 85.9% to co-trimoxazole, 80.0% to penicillin, 77.0% to ampicillin, 68.0% to chloramphe...

background bloodstream infection (bsi) is an important cause of mortality and morbidity and among the most common health-care associated infections. in this study we described the frequency of occurrence and antimicrobial susceptibility patterns of nosocomial and community-acquired bsi isolates from a teaching hospital in tehran, iran. patients and methods this cross-sectional study was conduct...

background ventilator- associated pneumonia (vap) continues to complicate the course of 8-28 % patients receiving mechanical ventilation. the mortality rate for vap is high, ranges from 24-50% and can reach 76% in some specific settings or when lung infection is caused by high risk pathogens. the etiologic agents widely differ according to the population of patients in an intensive care unit, d...

background nosocomial infections are generally occurring 72 hours after admittance and are not present or incubating prior to admittance. the most common nosocomial infection is urinary tract infection (uti). scanty data are available regarding the nosocomial infections in iranian teaching hospitals. the aim of the present study was to determine the frequency of symptomatic nosocomial uti, iden...

staphylococcus aureus is a major bacterial pathogen that causes different community- and hospital-acquired infections. over time, strains of s. aureus have become resistant to different antibiotics including penicillinase-resistant penicillins. having data on the local antimicrobial susceptibility pattern of this pathogen is necessary for selection of appropriate antibiotics for empirical treat...

     Staphylococcus aureus is a major bacterial pathogen that causes different community- and hospital-acquired infections. Over time, strains of S. aureus have become resistant to different antibiotics including penicillinase-resistant penicillins. Having data on the local antimicrobial susceptibility pattern of this pathogen is necessary for selection of appropriate...

Antimicrobial Susceptibility Pattern and Mutations of Outer Membrane Porin in Clinical Isolates Klebsiella pneumoniae

Background and Objectives: Urinary tract infections (UTI) are one of the most common infectious diseases with different microbial agent and antimicrobial resistant pattern in hospitalized patients and outpatients. In order to assess the adequacy of therapy, knowledge of prevalence and resistance pattern of the bacteria is necessary. The main aim of this study was to evaluate the prevalence and ...