Diagnosis can be performed in any laboratory which has the appropriate culture media. Identification of the three mycoplasmas responsible is relatively easy on the basis of cultural and biochemical characteristics, confirmed serologically. A clinical diagnosis within a herd can be confirmed by detecting serum antibodies by the complement fixation or ELISA techniques, which are also suitable for...

There is increasing interest in understanding the role of neighborhood-level factors on the health of individuals. Many large-scale epidemiological studies that accurately measure health status of individuals and individual risk factors exist. Sometimes these studies are linked to area-level databases (e.g. census) to assess the association between crude area-level characteristics and health. H...

Objective: WHO recommends countries consider dengue vaccination in geographic settings only where epidemiological data indicate a high burden of disease. In defining target populations, WHO recommend that prior infection with any dengue serotype should be >70% seroprevalence. Here we address considerations for serosurvey design in the context of the newly licensed CYD-TDV vaccine. Methods: To e...

We derive a new method to estimate the age specific incidence of an infection with a differential mortality, using individual level infection status data from successive surveys. The method consists of a) an SI-type model to express the incidence rate in terms of the prevalence and its derivatives as well as the difference in mortality rate, and b) a maximum likelihood approach to estimate the ...

The role of Delta(9)-tetrahydrocannabinol (THC) in driver impairment and motor vehicle crashes has traditionally been established in experimental and epidemiological studies. Experimental studies have repeatedly shown that THC impairs cognition, psychomotor function and actual driving performance in a dose related manner. The degree of performance impairment observed in experimental studies aft...

the aim of this descriptive and analytical type of study was to investigate epidemiological characteristics of post partum blues in pregnant women referring to maternity clinics in hafiz and zeinabieh hospital. the sample consisted of 400 pregnant women in their third trimester who were visited these clinics over the sampling period. the data were collected through two questionnaires; the first...