epidemiology is the study of disease distribution and factors determining or affecting it. likewise, endodontic epidemiology can be defined as the science of studying the distribution pattern and determinants of pulp and periapical diseases; specially apical periodontitis. although different study designs have been used in endodontics, researchers must pay more attention to study designs with h...

background: trinitrotoluene (tnt) is one of the most well-known and oldest explosive agents. in the recent decade, bioenvironmental, biochemical, and biological effects of tnt exposure have been more in the spotlight. in this study, we aimed to evaluate spirometric parameters in workers of a tnt factory exposed to tnt and other related fumes and dusts compared with the unexposed controls. metho...

background leptospirosis as an emerging infectious disease is considered as an important public health problem worldwide. objectives the current study aimed to identify potential risks for leptospirosis among rice farmers in khuzestan province, iran. patients and methods a cross-sectional study was carried out in khuzestan, south west iran, from october to december, 2012. randomly selected part...

Many infections are associated with occupations. Involvement in a particular occupation may place the person at higher direct risk of contracting certain infections. In some instances the life-style associated with the occupation results in a higher risk of exposure to the infection. The link between the infection and the workplace is often missed by the attending physician. This may be due to ...

STUDY OBJECTIVE The characteristics of some populations make epidemiological measurement extremely difficult. The objective of this study is to identify risk factors that explain variation among incidence densities and proportions of one occupational illness, green tobacco sickness, within one such special population, Latino migrant and seasonal farmworkers in the United States. DESIGN Prospe...

Objective: Primary immunodeficiency diseases (PID) are rare and heterogeneous congenital diseases leading to increased unusual susceptibility to developing infections and causingsome malignancies and autoimmune diseases. This study was conducted to evaluate the epidemiological characteristics of primary these diseases in patients attending the clinic of immunodeficiency diseases in Kerman.Subje...