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ORIGINAL ARTICLE
Year : 2019  |  Volume : 9  |  Issue : 1  |  Page : 20-24

Evaluation of biological effects of X-radiography and computed tomography scan on oral microflora


1 Department of Microbiology, College of Medicine, University of Karbala, Karbala, Iraq
2 Department of Physiology, College of Medicine, University of Karbala, Karbala, Iraq

Correspondence Address:
Prof. Ali Abdul Hussein S Al-Janabi
Department of Microbiology, College of Medicine, University of Karbala, Karbala
Iraq
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/ijohs.ijohs_53_18

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Introduction: X-ray is the most valuable tool for diagnosis of various diseases. Its radiation energy has a serious effect on living cells. The effects of X-radiography and computed tomography (CT) scans on the viability of oral microflora in the human were investigated. Methods: A total of 432 patients in two groups exposed to X-radiation were included in a cohort study. Group I (215) was exposed to X-radiography and Group II (217) to CT scan. Swab samples from the oral cavity were collected. Viability of normal oral flora in those patients was measured by microbial counting before and after exposure. Results: Radiation of X-ray techniques, especially for CT scan, showed an effect on most of bacterial multiplication by increasing their count after exposure. Meanwhile, fungal isolates and one of the bacteria (Staphylococcus aureus) were decreased in number after exposure. Some isolates were not affected by radiation from X-radiography. Conclusion: Radiation of routinely diagnostic X-ray found to play an important role in disturbance of microbial counting balance among oral flora through increasing the density of most kinds of them. Limitation of X-ray exposure is a safety precaution that should be taken to prevent adverse effects on normal flora of the human body.


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