Clinical signs
Clinical signs are only seen if PCMV infects a sow for the first time when she is late in pregnancy. Signs include foetal deaths, mummified foetuses, stillbirths and weak piglets. The sow may run a slight fever and be off her food. Rhinitis in newborn piglets can be severe enough to cause haemorrhage from the nose. In herds in which PCMV is endemic there are no symptoms other than mild sneezing in sucking and weaned piglets.