Effect of seasonal changes on the prevalence of uropathogens in 2010-2011and determination of antibiotic resistance pattern of Escherichia coli in three neighbor cities; Shiraz, Marvdasht and Saadat-Shahr

• Main Authors: Mohammad Pouryasin, Marjan Shaheli, Masoume Rahmani, Tannaz Heidarzadeh, Heidar Sharafi, Mohammad Farvardin
• Format: Article
• Language: English
• Published: Farname 2014-03-01
• Series: Iranian Journal of Medical Microbiology
• Subjects: Antibiotic Resistance; Seasonal changes; Urinary tract infections; Uropathogens.
• Online Access: http://www.ijmm.ir/browse.php?a_code=A-10-41-1&slc_lang=en&sid=1

Background: Urinary tract infection (UTI) is a common infection. Having enough knowledge about the etiology of UTIs and also antibiotic resistant pattern of E.coli as the commonest uropahtogen helps the physicians to deal with these kinds of infections. The aim of this study is to determine the prevalence of uropathogens originated by bacteria and antibiotic resistance pat-tern of E.coli as the most common cause of urinary tract infections. Material and methods: From 2010/09/23 to 2011/09/23 all medical case records of all patients diagnosed with UTI at Shahid Faghihi hospital (Shiraz, Iran), Shahid Motahari hospital (Marvdasht, Iran) and a private pathology laboratory (Saadat-Shahr, Iran) were analyzed in order to assess the prevalence of all bacterial uropathogens and the direct effect of seasonal changes on it. To determine the antibiotic resistance pattern of E.coli, from 2011/07/19 to 2011/08/30, in a cross-sectional study, 100 E.coli out of 146 gram-negative bacteria were detected by biochemical and gram stain tests. Antibiotic resistance tests were done using CLSI criteria. Results and conclusion: The prevalence of staphylococcus and Acinetobacter in both sexes and the prevalence of Streptococcus, Klebsiella and Diphtheroids among females were altered by seasonal changes. The resistance rates detected were 1% to Amikacin, 98% to Tetracycline, 15% to Gentamicin, 72% to co-trimoxazole, 56% to Ciprofloxacin, 66% to Nalidixic acid, 17% to Nitrofurantoin. In addition to the patients’ gender and the region of study, seasonal changes fol-lowed by thermal and humidity changes, is another significant factor which influences the etiolo-gy of UTIs. Also antibiotic resistance pattern would be different even in neighbor cities.