Streptococcus suis is a serious epidemic disease of sheep and goats. It is an acute heat-borne disease caused by hemolytic streptococcus, which occurs mostly in the cold season of winter and spring (from November to April of each year). The disease is mainly transmitted through the digestive tract and the respiratory tract. Its clinical features are mainly mandibular lymph nodes and swollen throat.
symptom
The sheep is weak at the beginning of the disease, the appetite is reduced or not eaten, the ruminant stops, the walking is unstable; the conjunctival congestion, tearing, and then purulent discharge; nasal nasal serous nasal fluid, then becomes purulent; mouth sputum, elevated body temperature Above 41 °C, throat and tongue swelling; feces soft, with mucus or blood; pregnant ewes abortion; some diseased sheep eyelids, lips, cheeks, breast swelling, sputum, molars, convulsions before dying.
Acute cases have difficulty breathing and die within 24 hours. Under normal circumstances, 2 to 3 days of death.
diagnosis
According to clinical symptoms and necropsy changes, combined with epidemiology can be initially diagnosed. The diagnosis can be carried out in the laboratory. The microscopic examination of the bacteria is mostly spherical, stranded or single, surrounded by capsules, and Gram staining is positive.
Prevention
Improve grazing management conditions, keep warm and windproof, antifreeze, anti-crowding, prevent disease sources.
Regularly eliminate parasites inside and outside the sheep.
Do a good job in the disinfection of sheep pens and venues and utensils. Pre-injection of streptococcus aluminum hydroxide formaldehyde vaccine is applied before the winter. The sheep are not divided into small and small, all subcutaneous injections are 3 ml, and the lambs within 3 months are immunized once every 14 to 21 days.
After the onset, the diseased sheep and suspicious sheep should be separately treated, and the site, equipment, etc. should be strictly disinfected with 10% lime milk or 3% of the camel, and the sheep dung and dirt will be fermented and the diseased sheep will be harmlessly treated. .
Each diseased sheep was intramuscularly injected with penicillin 30-600,000 international units once a day for 3 days. Intramuscular injection of 10 ml of 10% sulfathiazole once daily for 3 days. Can also be administered with sulfadiazine or chlorobenzenesulfonamide 4 to 8 grams, 2 times a day for 3 days.
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