What are the symptoms of sheep brucellosis? How to prevent it? (with diagnostic tips)
Sheep is a common species of livestock breeding, and it has a wide range of breeding in China. Brucellosis is a common disease in sheep breeding, and its harm is great. If the prevention and treatment is not timely, it will seriously affect the growth of sheep. The following is about sheep and blue. Diagnosis and control measures for bacillosis Let all growers quickly find out.
First, clinical symptoms
During the diagnosis, there were 5 abortion ewes, 1 ram, 13 dead lambs, 5 aborted ewes and 1 ram, and 8 mutated lambs, all culled. Harmful treatment. The sheep with symptoms are mainly aborted sheep and rams. Pregnant ewes usually have a miscarriage in 3-4 months of pregnancy. The appetite of the diseased sheep is reduced before the abortion, the amount of drinking water is increased, the spirit is sluggish, the pale yellow liquid is secreted from the vagina, and then the asymptomatic abortion is given. Or zombie tires. The skin of the sick lamb is purple-red. After dissecting the placenta, the placenta showed a yellow jelly-like infiltration; the orthodontic ram showed orchitis, and the test site hardened and hardened; the lamb and the bred sheep had no obvious symptoms.
Second, pathological changes
The abortion of the sick sheep aborted was found to have a yellow gelatinous infiltration of the placenta, and some of the placenta were covered with fibrin pus, the placenta was significantly thickened, and there was a scattered bleeding point. Anatomical 6 abortion fetuses, mainly characterized by severe sepsis lesions, a large number of bleeding spots and bleeding lesions in all aborted lamb membranes and mucosa, serous infiltration of subcutaneous and muscle tissue, swollen body lymph nodes, splenomegaly 2-3 times, necrotic lesions appear in the liver. There were no obvious changes in other organs.
Third, laboratory diagnosis
Abortion of the ewes of the ewes and the lymph node tissues of the aborted lambs in a sterile environment were completely pulverized. After the smear was made, the modified smear was used to dye the smear at a dilution ratio of 1:10. After 10 minutes, the smear was used for 5%. The acetic acid solution was decolorized for 20 s and then the smear was stained with 1% methylene blue stain. Microscopic examination revealed a large number of short bacilli or bacilli that were stained red, and the background color was blue.
The diseased material was inoculated on the selection medium, and 100 international units of penicillin and streptomycin were added to the medium, and placed in a 12% carbon oxide environment and an aerobic environment at 37 ° C, and the medium was observed every day. The pathogen was grown for 72 h and pathogenic bacteria were grown on the medium. The cultured pathogenic bacteria were transferred to serum dextrose agar medium, and the pathogenic bacteria grew well on serum dextrose agar medium. Typical symptoms of the diseased sheep fresh blood 5 parts of serum, agglutination with Brucella plate antigen, 4 minutes after the effect of 5 serum found granules and flocculation, and finally diagnosed as Brucella.
Fourth, prevention measures
B. faecalis is a national second-class animal disease. It does not require treatment after diagnosis, and the diseased sheep are directly culled for harmless treatment. After the diagnosis, it will be reported to the local government and animal departments in time, and the local government will issue a blockade order to block the farm. The farm is the epidemic point, and the infected area is within two kilometers radius. The two-kilometer radius of the infected area is a dangerous area.
During the blockade, all pigs, cattle and sheep animals and products are prohibited from entering the epidemic, epidemic areas and danger zones. Do a good job in the treatment of contaminated litter and feed in the epidemic area, epidemic areas, and at the same time do a good job of harmless treatment of sheep house droppings, pollutants, fetal clothes, and sick lambs. Every day, the morning and afternoon disinfection system is adhered to, and conventional disinfectants are used to disinfect the inside and outside of the farm and the pens every morning and evening. Feeding utensils such as forage drinking water tanks can be disinfected with a 0.1% potassium permanganate solution.
Sheep brucellosis is a very serious disease. If the prevention and treatment is not timely, it will endanger the entire farm. Therefore, you must pay attention to it. The above is about the diagnosis and prevention of brucellosis in sheep. You can learn from it.
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