Journal of Occupational Health and Epidemiology

70-75

Authors: MH Beheshti , A Firoozi chahak * , AA Alinaghi Langari

Background: Taxi drivers have the most important role in the public transport services. They are exposed to various harmful agents and occupational hazards. Noise is a harmful occupational factors and hearing loss is its most important effect. Protection of drivers against hearing loss is essential. This study was performed to determine the prevalence of hearing loss among taxi and agency drivers. Materials and Methods: This cross-sectional study was performed on 95 drivers (43 taxi drivers and 52 agency drivers) who were selected via simple random sampling. The threshold of drivers' hearing was measured by an audiometer. After data extraction, data were analyzed using Kruskal-Wallis test to compare the average level of hearing between the left and right ears and drivers. Results: The average age of taxi drivers and agency drivers was 43.5 ± 10.8 and 40.7 ± 8.3 years, respectively. In addition, the average work experience of taxi drivers and agency drivers was 9.5 and 6.5 years, respectively. The average of hearing threshold level in right and left ears of agency drivers was 12.96 ± 4.2 and 12.74 ± 4.64 dB and of taxi drivers was 12.53 ± 5.16 and 15.61 ± 12.7 dB, respectively. A hearing threshold of less than 25 dB in each ear illustrates the lack of hearing loss; thus, the studied drivers did not have hearing loss. Conclusions: The results showed that the drivers hearing status was satisfactory. Furthermore, the prevalence of hearing loss in taxi drivers was higher than agency drivers.

84-91

Authors: F Amani , F Daroghe , K Akharbeen , A Ahmadi Asour *

Background: Studies show that most students do not have sufficient scientific spirit and motivation and usually do not have the right attitude toward their chosen field of study. The aim of this study was to investigate the attitudes of students in occupational and environmental health at Ardabil University of Medical Sciences, Iran, toward their disciplines. Materials and Methods: This cross-sectional study examined the attitudes of 150 students of environmental and occupational health in relation to their field of study. The participants consisted of students who were studying at Ardabil University of Medical Sciences between 2010 and 2013. Data collection was conducted using a questionnaire. Data were analyzed using SPSS software and P values of less than 0.05 were considered as significant. Results: The mean and standard deviation score of attitudes of occupational and environmental health students toward their field of study and their future career were 39.6 ± 8.7 and 44.5 ± 8.5 (Total: 42), respectively. The mean score of environmental health students was close to the acceptable limit; however, the mean score of occupational health students was less than the acceptable limit. Mean score of attitude among male students was 43.2 ± 9.9, while it was 41.3 ± 8.3 among female students, indicating that the mean score of female students was below the acceptable limit and was not significant (P = 0.213). Mean score of attitude among single students was 42.6 ± 8.7, while it was 39.9 ± 9.2 among married students. The mean for married students was below the acceptable limit and this relationship was not significant (P = 0.015). Conclusions: Although the attitudes of environmental health students toward their major were positive, occupational health students’ attitudes were negative. Thus, the Ministry of Health and Medical Education can accommodate students’ admission to these majors considering the needs of the labor market. Moreover, these majors’ curricula should be based on the real needs of society and creating new job markets should be a high priority.

101-106

Authors: N Zia Sheikholeslami , M Rezaeian , A Heidarpoor , M Hadavi , M Tashakori *

Background: Nosocomial infections are an important cause of hospital mortalities. Staphylococcus aureus (S. aureus) carriers among medical staff are an important source of nosocomial infections. The purpose of this study was to investigate the prevalence of the nasal carriers of S. aureus and antibiotic resistance in staff of Nikuee Hospital, Qom, Iran. Materials and Methods: In this cross-sectional study, 152 health care workers (HCWs) were assessed to determine the frequency of nasal carriage of S. aureus, the rates of methicillin-resistant S. aureus (MRSA), and their antibiotic resistance profiles in Nikuee Hospital in 2012. Clinical samples were cultured and S. aureus was detected using conventional bacteriologic methods. Antimicrobial susceptibility patterns against penicillin, vancomycin, erythromycin, clindamycin, cefazolin, co-trimoxazole, and doxycycline were evaluated using the Kirby-Bauer disk diffusion technique. Methicillin resistance was confirmed by oxacillin disk diffusion test. Data were analyzed in SPSS software using chi-square test and independent two-sample t-test. Results: Among the processed samples, 34.2% illustrated nasal carriage of S. aureus, and among them, 23.5% were carriers of MRSA. None of the isolates were resistant to vancomycin. However, 96.1%, 33.3%, 27.5%, 19.6%, 9.8%, and 15.7% resistance to penicillin, erythromycin, clindamycin, cefazolin, co-trimoxazole, and doxycycline were observed. There was no significant relationship between sex, age, and number of years of healthcare service and positive nasal carriage. Conclusions: Data obtained in this study revealed high prevalence of nasal carriage of S. aureus (34.2%) in HCWs at Nikuee Hospital. Therefore, it can be concluded that the role of the hospital staff in Nikuee Hospital as a source of staphylococcal infections is prominent. Thus, to prevent nosocomial infections, we recommend the identification and treatment of the carriers among the staff of other hospitals.

116-124

Authors: MH Beheshti , E Boroumand Nejad , B Bahalgerdy , F Mehrafshan * , A Zamani Arimy

Background: Heat stress is one of the harmful factors present in many workplaces. It can lead to performance loss and low functionality of the labor force. Therefore, the aim of this study was to evaluate exposure to heat stress and its consequent performance loss among workers functioning in indoor high-temperature workplaces. Materials and Methods: This descriptive, analytical study was conducted on indoor high-temperature occupations in spring 2014. This study was conducted on 15 bakeries, 11 restaurants and kitchens, and 2 industries with heating processes in Gonabad city, Iran. In total, 1450 individuals worked on the investigated sites and were exposed to thermal stress. The inclusion criterion for this study was working in an environment that included a heating process and the exclusion criterion was unwillingness to participate in the study. Heat stress was measured based on wet-bulb globe temperature(WBGT) and the ISO 7243standard. The graph of performance loss versus thermal stress proposed by Kjellstrom et al. was used to determine the performance loss caused by thermal stress.All individuals and managers were informed of the aims of the project and were assured of the confidentiality of the data. Statistical analyses were performed using SPSS software. Results: The mean exposure to heat stress in Barbari, Sangak, and Lavash (three types of bread) bakeries were 29.73, 27.89, and 29.43 °C, with a mean performance loss of 65%, 23%, and 64%, respectively. In some cases, the performance loss in Lavash bakeries was as high as 98%. The mean exposure to heat stress in refractory brick and porcelain manufacturing industries were 32.04 ºC and 32.35 °C, leading to a concomitant performance loss of 89% and 92%, respectively. The mean WBGT in the kitchens was 31.88, which could lead to a performance loss of 80%. Conclusions: In addition to a host of diseases and complications caused by heat stress, extreme heat in the workplace can significantly reduce the performance of the labor force, and consequently,their production. Through appropriate planning and control of heat stress in the workplace, not only are many diseases prevented, but also the performance and efficiency of workers are greatly improved.