Understanding and managing transmissible gastroenteritis virus in pig herds to protect welfare.
TGE outbreaks cause some of the most severe acute welfare emergencies on pig farms. Affected piglets experience intense vomiting, watery diarrhoea, dehydration, and rapid collapse. Death can occur within 24-48 hours of onset. The distress during the acute phase is significant — piglets are weak, cold, and unable to nurse.
Older pigs recover but suffer substantial acute illness. Vomiting and diarrhoea cause dehydration, electrolyte loss, and metabolic acidosis. Pigs are depressed, reluctant to eat, and pile together for warmth. Recovery is slow and body condition losses persist for weeks.
In enzootic herds where the virus circulates continuously, sow vaccination is the primary control strategy. Vaccinated sows produce colostrum containing protective antibodies that shield piglets during the critical early weeks. Emergency protocols during acute outbreaks focus on fluid replacement, warmth, and supportive care to reduce mortality.