Most of the pigs in herds with diarrhea and vomiting can cause a digestive disease is characterized by watery diarrhea and rapid propagation velocity explosive. Mainly occurs in low temperature conditions in winter and (in November and then many over year in April, and in particular most often in January), regardless of the age onset of one, 100% horrible disease mortality in particular it occurs in piglets of less than one week old.

1. Agent
  Coronaviridae, Coronavirus(Transmissible Gastroenteritis virus, TGEV)
   stable at low temperatures (6 months at -20 ℃ survival) and sensitive to the sunlight occurs mostly in the winter. An affinity to the stomach epithelial cells then the growth and destroys epithelial cells herein.
 
2. Epidemiology
Sporadically occur in the world.
  
 
3. Clinical Signs
  . Suckling piglet : After an incubation period of 12hours –1day, a yellowish green or greyish white odor and severe watery diarrhea, the milk also contains undigested lumps. Sometimes appear vomiting, piglets of less than 1 week are mostly endemic and die within 2-7days.
. Finisher : caused by sudden vomiting, and diarrhea tend to show the onset generally recovered within a week. However, in some cases mixed infection with other diseases, mortality up to 25-30%.
. Pregnant Sow : the high incidence of symptoms than frower and significantly higher during delivery are most susceptible to infection often it occurs simultaneously with newborn piglets.
. Sow : Symptoms are lighter but poor growth of suckling piglets due to milk drops off dramatically.


4. Prevention
1) Strategy
  The temperature increase of the piglet pens at about 30 ℃ in consultation with experts in order to reduce dehydration and multiple infections at the same time to reduce the damage by administering such fluid and antibiotics. In the case of pig farms illness occurred after a thorough disinfection of the pregnant sows to date to move closer to the delivery room and the other special disinfection managed to block the spread of pathogens. Pigs and pig farms to buy only reliable diarrheal disease could occur at the time of purchase. Pigs and feed transport vehicles, transit traders, other pig farms, etc. and control the entry of outsiders, unavoidable cases, ever accessible and disinfection measures. There is excreted by an infected pig stool contains a large amount of pathogen propagation is an important factor because it groups dedicated to the thorough disinfection and sanitation of around pig farms.
 
2) Vaccination
   TGE live vaccine for primary immunization at 5-7 weeks before delivery, and again inoculated 2-3 weeks before delivery blocks in the secondary prevention of damage piglets.

 

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