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Background & objectives: Sulfur B dye is one of the used dyes in the textile industry which is disposed into the wastewater in the large amount during textile industry activities. In this research, the photocatalytic degradation of sulfur B dye was investigated using ZnO as a photocatalyst under UV irradiation in aqueous solutions.
Methods: In this experimental study, a 2.8 L reactor is used. The effect of operational factors including photocatalyst (0.1-4000 mg/l), dye concentration (1-400 mg/l) and the initial pH (3-11) were investigated in the steady UV intensity on dye removal. Dye concentration was measured by spectrophotometer at 550 nm wavelength.
Results: The result of this study reveales that by increasing the pH from 3 to 11, the efficiency of dye removal increases from 28 to 90%, respectively. Increment of the initial dye concentration from 1 to 400 mg/l reduces the dye removal from 94 to 57%, respectively. By increasing catalyst to initial dye up to 3 mg/l, the dye removal increases to 94% without any further dye removal efficiency by adding the ratio. 
Conclusion: The results showed that concurrent existence of catalyst and UV is necessary for further dye removal. Increasing pH value can produce higher hydroxyl radical, which can increase dye removal. Increasing initial dye concentration prevents efficient light penetration through the solution and thus dye removal is reduced. Increasing the amount of nanoparticle dosage increases the presence of active sites to produce more hydroxyl radicals.

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Background & objectives: WHO has identified Leishmaniasis as one of the six major diseases in tropical and subtropical regions. Due to the high prevalence of this disease during recent years in the Mehran Township and becoming one of the high-risk areas, this study aimed to determine the status of Leishmaniasis in the Mehran Township during 2013-2017.
Methods: In this descriptive cross-sectional study, the data of all Leishmaniasis disease patients referred to the health centers of Mehran Township were investigated during 2013-2017. Required data such as gender, job, place of residence, and age of patients were collected and analyzed by Excel software.
Results: In this research, the numbers of people with Leishmaniasis were 2037 during the years of 2013 to 2017, of which 56.16% (1144 people) were men and 69.70% (1419 people) were residents in the urban area. The age group of 0-10 years with 29.70% (605 people) had the highest prevalence rate. From job perspective, housewives had the highest percentages with 27.10% (277 people) during 2015 to 2017.
Conclusion: Performing actions such as justifying the authorities about the importance of the disease especially the risk of it becoming epidemic, implementation control programs for carriers and reservoirs with appropriate establishment, paying more attention to the training of health care providers in the public and private sectors, and paying attention to community education especially in the endemic areas can be effective in controlling this disease.