In the '''acute form''', anorexia and pyrexia are the two most common clinical signs in younger pigs. Affected animals still die but normally after a day during which time they become dyspnoic. Older pigs tend to be pyrexic, anorexic and polydypsic. | In the '''acute form''', anorexia and pyrexia are the two most common clinical signs in younger pigs. Affected animals still die but normally after a day during which time they become dyspnoic. Older pigs tend to be pyrexic, anorexic and polydypsic. |