background : the present study was undertaken to ascertain whether (or not) long term occupational exposure to low (sub-tlv levels) atmospheric concentrations of chlorine gas was associated with any significant decrements in the parameters of pulmonary function and/or  increased prevalence of respiratory symptoms. methods : in this retrospective cohort study that was performed in 2012, 54 worke...

dust can be produced by almost all production processes in portland cement factory. dust exposure potentially can affect respiratory function. but evidence for respiratory effect of cement dust exposure has not been conclusive. in this study we assessed effect of cement dust exposure on respiratory function in a cement production factory. a respiratory symptoms questionnaire was completed and p...

asthma is one of the most common chronic illnesses in childhood with an increased rate of hospitalization. in order to detemine the considerable factors for hospitalization of asthmatic children in our patients, we carried out a retrospective study of children with asthma who were admitted to children medical center affiliated to tehran university of medical sciences over a 3 year period ( 1993...

chronic granulomatous disease represents a group of inherited disorders of phagocytic system wherein recurrent infections are seen at different sites especially in the respiratory system. to determine the clinical spectrum of respiratory manifestations in chronic granulomatous disease patients, in this retrospective study, we used data from iranian primary immunodeficiency registry. the diagnos...

conclusions: this study indicates that rsv is a substantial cause of respiratory tract infection in infants less than 2 years old. rt-pcr offers a rapid method for detection of rsv in hospitalized children with lrti. results: during the study period, 9 children had a positive result for rsv infection. the median age of these patients was 10 months. bronchiolitis was the clinical diagnosis of pa...

cryptosporial and bacterial co-infection is reported in a budgerigar with clinical manifestations of septicemia and respiratory tract infection. microscopically large number of round to oval 2-5μm cryptosporidial organisms were found to be lodged on the parabronchial epithelial cells of the respiratory tract. the bacterial colonies were seen around the parabronchial spaces of the lung tissue. i...

arterial blood gas parameters were analyzed in forty-nine healthy persons (31 males, 18 females) to detemine reference values fo these parameters and their relation to the time from last food intake to arterial puncture (t). the mean ± standard deviation of arterial oxygen pressure, arterial carbon dioxide pressure and ph at core body temperature were 84.4±7.0 mmhg (male: 83.0±6.5, female: 86.7...

more than one percent of the labor force in each country consists of welders exposed to various damages caused by welding. the number of studies conducted in this field is low, especially in iran. in this paper, we tried to discover any temporary and reversible obstructive effect of welding fumes on the respiratory systems of welders. in this cross-sectional study, peak expiratory flow rates an...

conclusions though antibiotics are rarely indicated, they are often still used to treat rtis. the resulting increase in bacterial resistance, the lack of treatment efficacy, and drug-related side effects all underscore the need for alternative strategies to manage recurrent rtis. this article uses a typical pediatric case study to review central issues in the diagnosis and management of recurre...

on june 2005, a respiratory disease was observed in the chickens of a large broiler farm in kermanshahprovince, west of iran. relatively severe respiratory signs started with sneezing at 27 days of age. thedisease lasted up to the end of fattening period and accompanied by increased mortality (13.6%). at postmortemexamination, tracheitis, airsacculitis and pneumonia were obvious. serologic exam...