DIFFERENT STRAINS OF ENTEROCOCCI IN SEWAGE TREATMENT PLANTS IN TEHRAN

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SHAGHAGHI B.; NAKHOST LOTFI M.; MAHMMODI N.S.; POURSHAFIEI M.R.

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Journal: Iranian Journal of Infectious Diseases and Tropical Medicine Year:2007 | Volume:12 | Issue:37 Page(s): 61-66

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Title

DIFFERENT STRAINS OF ENTEROCOCCI IN SEWAGE TREATMENT PLANTS IN TEHRAN

Author(s)

SHAGHAGHI B. | NAKHOST LOTFI M. | MAHMMODI N.S. | POURSHAFIEI M.R. | Issue Writer Certificate

Keywords

ANTIBIOTIC RESISTANCEQ2

RAW SEWAGEQ3

ENTEROCOCCUSQ2

Abstract

Background and objective: Enterococci are the second agent of UTI, the third agent of bacteremia and the second agent of hospital infections. In recent years, vancomycin has been considered as one of the most effective treatments for enterococcal infections. The rapid rise in the vancomycin-resistant entrococci (VRE) has also become a danger for public health. The use of wastewater for irrigation, in some cases, will increase the danger of rapid dissemination of the antibiotic resistant genes by enterococci. The aim of the present study was to determine different strains of enterococci in sewage treatment plants in Tehran, Iran, and their susceptibility to antibiotics.Material and methods: Samples collected four times from urban sewage treatment plant in Tehran between June 2005 and July 2006. Filtered samples were initially grown on mEnterococci medium containing 4mg/ml vancomycin. The isolates were identified by biochemical tests such as arabinose, argenine, growth at 45°C and NaCl 6.5%. All strains were then tested for their resistance against vancomycin, ampicillin, chloramphenicol, ciprofloxacin, erythromycin, tetracycline, streptomycin, amikacin and gentamycin and MIC were determined by microdilution broth test for vancomycm.Results: Of the 131 isolates resistance to 4 mg/ml vancomycin, 98 (75%) were identified as ENTEROCOCCUS gallinarum, 24 (18%) as E. faecium and 9 (7%) as E. casseliflavus. There was a significant increase in the rate of resistance to all antibiotics (except chloramphenicol) among enterococci isolated during 2006 compared to 2005. Most of the samples were resistant to more than one antibiotic.Conclusion: The results showed that E.faecium and E. gallinarum were the most common species in the Tehran sewage treatment plant. E. casseliflavus showed the least prevalence. The results indicated that there was a significant increase in the rate of resistance to all antibiotics (except chloramphenicol) among enterococci isolated during 2006 compared to 2005. Our results may also suggest that the highly resistant glycopeptide E. gallinarum and E. casseliflavus in our study have captured plasmid containing resistant genes under natural conditions.

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APA: Copy

SHAGHAGHI, B., NAKHOST LOTFI, M., MAHMMODI, N.S., & POURSHAFIEI, M.R.. (2007). DIFFERENT STRAINS OF ENTEROCOCCI IN SEWAGE TREATMENT PLANTS IN TEHRAN. IRANIAN JOURNAL OF INFECTIOUS DISEASES AND TROPICAL MEDICINE, 12(37), 61-66. SID. https://sid.ir/paper/52963/en

Vancouver: Copy

SHAGHAGHI B., NAKHOST LOTFI M., MAHMMODI N.S., POURSHAFIEI M.R.. DIFFERENT STRAINS OF ENTEROCOCCI IN SEWAGE TREATMENT PLANTS IN TEHRAN. IRANIAN JOURNAL OF INFECTIOUS DISEASES AND TROPICAL MEDICINE[Internet]. 2007;12(37):61-66. Available from: https://sid.ir/paper/52963/en

IEEE: Copy

B. SHAGHAGHI, M. NAKHOST LOTFI, N.S. MAHMMODI, and M.R. POURSHAFIEI, “DIFFERENT STRAINS OF ENTEROCOCCI IN SEWAGE TREATMENT PLANTS IN TEHRAN,” IRANIAN JOURNAL OF INFECTIOUS DISEASES AND TROPICAL MEDICINE, vol. 12, no. 37, pp. 61–66, 2007, [Online]. Available: https://sid.ir/paper/52963/en

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