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Prevalence and antimicrobial resistance of shigella species isolated from diarrheal patients in Ahvaz, Southwest Iran
Authors
M. Abdi
M. Heidary
+7 more
N. Jomehzadeh
S. Khoshnood
M. Moosavian
M. Saki
S. Seyed-Mohammadi
F. Shahi
A.F. Sheikh
Publication date
1 January 2019
Publisher
Abstract
Introduction: Shigellosis is a significant global human health problem, and Shigella is in charge of almost 165 million cases of this disease annually, of whom 163 million cases are in developing countries and 1.5 million cases are in developed countries. The main aims of the current survey were to identify Shigella spp. isolated from diarrheal patients by conventional biochemical tests, determine the antimicrobial susceptibility profiles by disk diffusion method, and detect the ipaH gene using the PCR assay. Methods: The bacterial isolates were identified as Shigella spp. by microbiological tests and were serogrouped by the slide agglutination test. Antimicrobial susceptibility testing was performed using the disk diffusion method. PCR was performed to detect the ipaH gene. Results: The Shigella strains were isolated from 522 patients with various diarrhea, including bloody diarrhea (3), mucoid plus bloody diarrhea (1.9), mucoid diarrhea (3.2), and watery diarrhea (3.2). Overall, 69 (13.2) isolates were positive for Shigella spp., of which 34 (49.3) serotypes were identified as Shigella flexneri, 22 (31.9) serotypes were identified as Shigella sonnei, 9 (13) serotypes were identified as Shigella boydii, and 4 (5.8) serotypes were identified as Shigella dysenteriae. Antibiotic susceptibility tests revealed that the highest resistance percentage was related to ampicillin (82) and trimethoprim-sulfamethoxazole (77), and ciprofloxacin and ceftriaxone were the best antibiotics against Shigella isolates. Conclusion: We concluded that Shigella spp. can be considered as an etiological agent of diarrhea in southwest Iran. Since the drug resistance pattern of Shigella differs geographically and over time within a country, continuous and regular surveillance program is necessary. © 2019 Sheikh et al
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oai:eprints.iums.ac.ir:15338
Last time updated on 01/12/2020