Sustainable animal production requires a healthy production system including healthy animals producing wholesome products. Epidemiology as a discipline is concerned with the occurrence of disease or disease indicators in populations as well as with factors influencing disease occurrence. By providing this information, epidemiology contributes significantly to the development and maintenance of ...

Most growing/finishing swine facilities have been operated on a continuous basis; that is, they always contain pigs of different ages and weight. Due to the fact that pigs are always present, it is impossible to thoroughly clean, disinfect, or fumigate the environment. It is generally assumed that the common air space shared by pigs of various age groups allows for both clinical and subclinical...

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