Paper Information

Journal:   JOURNAL OF RESEARCH IN MEDICAL SCIENCES (JRMS)   MARCH 2014 , Volume 19 , Number SUPPLEMENT 1; Page(s) 51 To 55.
 
Paper: 

WIDESPREAD ANTIBIOTIC RESISTANCE OF DIARRHEAGENIC ESCHERICHIA COLI AND SHIGELLA SPECIES

 
 
Author(s):  FATAHI SADEGHABADI AZAM, AJAMI ALI, FADAEI REZA, ZANDIEH MASOUD, HEIDARI ELHAM, SADEGHI MAHMOUD, ATAEI BEHROOZ, GHAFFARI HOSEINI SHERVIN*
 
* INFECTIOUS DISEASES AND TROPICAL MEDICINE RESEARCH CENTER, ISFAHAN UNIVERSITY OF MEDICAL SCIENCES, ISFAHAN, IRAN
 
Abstract: 

Background: Antibiotic resistance of enteric pathogens particularly Shigella species, is a critical world-wide problem and monitoring their resistant pattern is essential, because the choice of antibiotics is absolutely dependent on regional antibiotic susceptibility patterns. During summer 2013, an unusual increase in number of diarrheal diseases was noticed in Isfahan, a central province of Iran. Therefore, the antibiotic resistance of diarrheagenic Escherichia coli and Shigella species isolated were evaluated.
Materials and Methods: According to the guideline on National Surveillance System for Foodborn Diseases, random samples from patients with acute diarrhea were examined in local laboratories of health centers and samples suspicious of Shigella spp. were further assessed in referral laboratory. Isolated pathogens were identified by standard biochemical and serologic tests and antibiotic susceptibility testing was carried out by disc diff usion method.
Results: A total of 1086 specimens were obtained and 58 samples suspicious of Shigella were specifically evaluated. The most prevalent isolated pathogen was Shigella sonnei (26.58) followed by E. coli (25.58) and Shigella flexneri (3.58). A large number of isolated bacteria were resistant to co-trimoxazole (Shigella spp: 100%, E. coli: 80%), azithromycin (Shigella spp: 70.4%, E. coli: 44.0%), ceftriaxone (Shigella spp: 88.9%, E. coli: 56.0%) and cefixime (Shigella spp: 85.2%, E. coli: 68.0%). About88.3% of S. sonnei isolates, one S. flexneri isolate, and 56% of E. coli strains were resistant to at least three antibiotic classes (multidrug resistant).
Conclusion: Due to high levels of resistance to recommended and commonly used antibiotics for diarrhea, continuous monitoring of antibiotic resistance seems essential for determining best options of empirical therapy.

 
Keyword(s): ANTIBIOTIC RESISTANCE, DIARRHEA, ESCHERICHIA COLI, IRAN, SHIGELLA
 
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