Systematic Veterinary Virology

PIGS

• Peracute reactions are characterized by sudden sharp fevers and death before other premonitory signs develop. Acute cases have a similar sudden onset, manifested by fever, inappetence and depression.
• Two days after the onset of fever, affected pigs shiver, vomit and bleeding is seen from the nose. Shallow erosions emerge in the oral mucosa while vesicles erupt in the perineal skin. Diarrhoea follows erosions in oral mucosa. The fluid faeces is fetid and heavily streaked with blood. Pregnant sows abort.