Japanese encephalitis is a zoonotic disease caused by Japanese encephalitis virus, and it is also a disease that is extremely harmful to pig industry. JE is mainly transmitted by mosquito bites, and the virus can propagate in mosquitoes and overwinter, and spread through mosquito eggs, so JE has obvious seasonality, and 80% of cases occur from July to September.
Streptococcal encephalitis is a very common disease in pig farms. There are four main types, including sepsis, meningitis, arthritis and lymphatic abscess. Streptococcal encephalitis is common in suckling piglets and weaning piglets, with body temperature rising to 40.5-42℃, poor spirit and constipation. There are nervous system symptoms, such as dyskinesia, turning in circles, walking blindly, chewing empty, lying on your back, etc. Paralysis of hind limbs, lying on one side of the ground, paddling limbs like swimming.
Prevention and treatment of streptococcus encephalitis;
The inactivated vaccine made of Streptococcus type 2 strain has good immune effect. Pregnant sows can be vaccinated 4 weeks before delivery, and reserve sows can be vaccinated once before mating. Piglets 15 days old can be inoculated once. For the treatment of Streptococcus encephalitis, after a lot of clinical practice, a set of schemes is summarized: the normal dose of sulfanilamide is 2 times, and dexamethasone is 2-4 ml.
On the other hand, injection of penicillin or cephalosporin, once every 12 hours, three times in a row, can often see good results. For example, 15kg of newly weaned piglets were injected with 4ml of sulfadiazine sodium and 2ml of dexamethasone, and 2ml of cefotaxime sodium was injected on the other side.