Abstract
Swine erysipelas (SE) is a severe pig disease, resulting in considerable economic losses. So, preventing its outbreaks plays a key role. The great majority of pigs in Hunan Province, China are reared in intensive swine production areas on farms. Feeders’ care degree is responsible for the adhesion of SE to the food and tools. Meteorological elements (ME) are responsible for the survival time of SE. In this work, we presented a difference equation model based on these two aspects. Five key ME are identified. The most optimal ME for SE outbreak is analyzed. The mechanism of SE outbreak is explored. This work may help farmers take measures against SE outbreaks in advance, and reduce the financial losses.