Chickens are much susceptible to diseases and the disease spreads in an epidemic form. So a breeder must be active enough to check the disease and the best thing is that the infected bird should be separated, immediately and rest of the flock should be subjected to further check and preventions. All the precautions must be taken to avoid the [...]
In this article we will discuss about:- 1. Selection of Cases and Controls 2. Comparability of Cases and Controls 3. Obtaining Information about Factor of Interest 4. Analysis of Case-Control Study. 1. Selection of Cases and Controls: In addition to being clear and concise, the criteria required to be a case should be highly specific in order to exclude false-positive [...]
In this article we will discuss about:- 1. Selection of Exposed and Unexposed Groups 2. Follow-Up Period in Cohort Disease 3. Determining Occurrence of Disease 4. Analysis. 1. Selection of Exposed and Unexposed Groups: In most cohort studies, special exposure groups are purposively selected for comparison. This could include comparing rates of disease(s) in different breeds; comparing rates of pneumonia [...]