The epidemiological prevalence of fungal infections among operating personnel in a petroleum refinery under warm and humid condition
Infectious diseases are one of the most important health and economic problems in the world, especially in developing countries. Hence, the present study was aimed to investigate the epidemiological prevalence and predict the effective factors on the fungal infections among the operating personnel in an petroleum refinery from south of Iran under warm and humid condition.
Of all 200 people included in the study, five parts of the body from each person including the auricle, ear canal, foot toes, foot palm, and foot nail were sampled. After sampling, the collected samples were transported into a laboratory and cultured in a culture medium for three weeks under thermal conditions of 25 centigrade in an incubator. In the next step, the grown fungi were detected using the colony examination and fungal characteristics of staining with lactophenol cotton blue, and the slide culture method. As well as, air temperature and relative humidity were measured using a WBGT. In final, data were analyzed using SPPSS software version 22.
The mean and standard deviation of the air temperature and relative humidity in the operating units were 39.2 ± 7.34 degree of Celsius and 75.8 ± 15.31 percent, respectively. Of 200 samples cultured in the laboratory, 188 showed negative culture results and 12 samples had positive culture results. The fungal infections were founded in measured body parts of some people including the auricle of four subjects, ear canal of nine subjects, foot toes of five subjects, foot palm of six subjects, and foot nail of twelve subjects. Of 1000 isolated samples, 15 cases had been infected with trichophyton, eight cases with onychomycosis, six cases with aspergillus, four subjects with Candiais, and three cases with microsporum harborum.
Based on the results, trichophyton are most common fungal infections. As well as, foot nail and ear canal areas were founded as most prevalence of places with the infections.
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