Sensitivity to Antibiotics of Bacteria Exposed to Gamma Radiation Emitted from Hot Soils of the High Background Radiation Areas of Ramsar, Northern Iran

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MORTAZAVI SEYED MOHAMMAD JAVAD; ZAREI SAMIRA; TAHERI MOHAMMAD; TAJBAKHSH SAEED; MORTAZAVI SEYED ALIREZA; Ranjbar Sahar; MOMENI FATEMEH; Masoomi Samaneh; Ansari Leila; MOVAHEDI MOHAMMAD MEHDI; TAEB SHAHRAM; Zarei Sina; HAGHANI MASOUD

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Journal: INTERNATIONAL JOURNAL OF OCCUPATIONAL AND ENVIRONMENTAL MEDICINE Year:2017 | Volume:8 | Issue:2 Page(s): 80-84

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Title

Sensitivity to Antibiotics of Bacteria Exposed to Gamma Radiation Emitted from Hot Soils of the High Background Radiation Areas of Ramsar, Northern Iran

Author(s)

Keywords

Microbiology

Background radiation

Microbial sensitivity tests

Electromagnetic radiation

Gamma rays

Hormesis

Abstract

Background: Over the past several years our laboratories have investigated different aspects of the challenging issue of the alterations in bacterial susceptibility to antibiotics induced by physical stresses. Objective: To explore the bacterial susceptibility to antibiotics in samples of Salmonella enterica subsp. enterica serovar Typhimurium (S. typhimurium), Staphylococcus aureus, and Klebsiella pneumoniae after exposure to gamma radiation emitted from the soil samples taken from the high Background radiation areas of Ramsar, northern Iran. Methods: Standard Kirby-Bauer test, which evaluates the size of the zone of inhibition as an indicator of the susceptibility of different bacteria to antibiotics, was used in this study. Results: The maximum alteration of the diameter of inhibition zone was found for K. pneumoniae when tested for ciprofloxacin. In this case, the mean diameter of no growth zone in non-irradiated control samples of K. pneumoniae was 20. 3 (SD 0. 6) mm; it was 14. 7 (SD 0. 6) mm in irradiated samples. On the other hand, the minimum changes in the diameter of inhibition zone were found for S. typhimurium and S. aureus when these bacteria were tested for nitrofurantoin and cephalexin, respectively. Conclusion: Gamma rays were capable of making significant alterations in bacterial susceptibility to antibiotics. It can be hypothesized that high levels of natural Background radiation can induce adaptive phenomena that help microorganisms better cope with lethal effects of antibiotics.

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APA: Copy

MORTAZAVI, SEYED MOHAMMAD JAVAD, ZAREI, SAMIRA, TAHERI, MOHAMMAD, TAJBAKHSH, SAEED, MORTAZAVI, SEYED ALIREZA, Ranjbar, Sahar, MOMENI, FATEMEH, Masoomi, Samaneh, Ansari, Leila, MOVAHEDI, MOHAMMAD MEHDI, TAEB, SHAHRAM, Zarei, Sina, & HAGHANI, MASOUD. (2017). Sensitivity to Antibiotics of Bacteria Exposed to Gamma Radiation Emitted from Hot Soils of the High Background Radiation Areas of Ramsar, Northern Iran. INTERNATIONAL JOURNAL OF OCCUPATIONAL AND ENVIRONMENTAL MEDICINE, 8(2), 80-84. SID. https://sid.ir/paper/320380/en

Vancouver: Copy

MORTAZAVI SEYED MOHAMMAD JAVAD, ZAREI SAMIRA, TAHERI MOHAMMAD, TAJBAKHSH SAEED, MORTAZAVI SEYED ALIREZA, Ranjbar Sahar, MOMENI FATEMEH, Masoomi Samaneh, Ansari Leila, MOVAHEDI MOHAMMAD MEHDI, TAEB SHAHRAM, Zarei Sina, HAGHANI MASOUD. Sensitivity to Antibiotics of Bacteria Exposed to Gamma Radiation Emitted from Hot Soils of the High Background Radiation Areas of Ramsar, Northern Iran. INTERNATIONAL JOURNAL OF OCCUPATIONAL AND ENVIRONMENTAL MEDICINE[Internet]. 2017;8(2):80-84. Available from: https://sid.ir/paper/320380/en

IEEE: Copy

SEYED MOHAMMAD JAVAD MORTAZAVI, SAMIRA ZAREI, MOHAMMAD TAHERI, SAEED TAJBAKHSH, SEYED ALIREZA MORTAZAVI, Sahar Ranjbar, FATEMEH MOMENI, Samaneh Masoomi, Leila Ansari, MOHAMMAD MEHDI MOVAHEDI, SHAHRAM TAEB, Sina Zarei, and MASOUD HAGHANI, “Sensitivity to Antibiotics of Bacteria Exposed to Gamma Radiation Emitted from Hot Soils of the High Background Radiation Areas of Ramsar, Northern Iran,” INTERNATIONAL JOURNAL OF OCCUPATIONAL AND ENVIRONMENTAL MEDICINE, vol. 8, no. 2, pp. 80–84, 2017, [Online]. Available: https://sid.ir/paper/320380/en

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