Alfakoronawirus i deltakoronawirus oraz wywoływane przez nie choroby biegunkowe świń

The characterization of Porcine Epidemic Diarrhea (PED) caused by Porcine Alphacoronavirus (PEDV), followed by a short description of Porcine Deltacoronavirus infection, is presented. The occurrence of PED is given, mentioning Europe in the period 1970-1990 including sporadic outbreaks later, Asia – starting since the 90-ties until now, and the Americas, particularly USA, since 2013. The characteristics of PEDV are given, followed by the text concerning infection and pathogenesis, clinical symptoms, anatomical changes, laboratory diagnosis, presence in matrices, prevention and control. In the description of the Porcine Deltacoronavirus (PDCoV), its first detection in Hong Kong in 2012 is mentioned, followed by its identification in the beginning of 2014 and later in the USA, Canada and China. Based on the currently available field observation from the USA the opinion is existing, that PDCoV infection would have a lower impact than PED. Diagnostic tests are in the final stage of validation. When more broadly applied they will contribute to better knowledge about the importance of PDCoV infection in the swine production.