Prevention and treatment of sheep pox in small-tailed Han sheep

Sheep pox of small tail Han sheep is an acute febrile contact infectious disease caused by sheep pox virus. It is the most serious febrile contact infectious disease among many kinds of livestock pox, and it has a typical pathological process. Clinical symptoms and pathological changes of sheep pox in small tail Han sheep, but the symptoms were mild. It is characterized by papules and pimples on the skin and mucosa of diseased sheep, mainly through respiratory tract and digestive tract. Infectious pleuropneumonia in small-tailed Han sheep is caused by mycoplasma, and the route of transmission is mainly through droplets, which is mostly acute, and the case fatality rate can reach more than 45% to 55%. The mixed infection of sheep pox and mycoplasmosis does great harm, which reduces the economic benefit and seriously affects the healthy and stable development of sheep industry.

Symptom

The main manifestations of diseased sheep were dyspnea, serous and purulent nasal juice, papules of different sizes on the medial thigh, and so on. The disease spreads rapidly and is serious. The morbidity is 56.6% and the case fatality rate is 38.5%. Clinical symptoms include loss of appetite, depression of spirit, flushing of conjunctiva, tears and elevated body temperature. Some diseased sheep had serous or mucinous snot, eyelid swelling, conjunctival congestion and serous secretions. The body temperature of diseased sheep rose to 42 ℃ before acne and began to develop acne after 1-4 days. Erythema begins, and papules are formed 2 days later. The papules gradually enlarge and become gray-white blisters. The blister fluid gradually becomes turbid and becomes pimples, then ruptures or the contents dry up, forming brown crusts, which are cured after scab removal. The whole process is about 4 weeks. Sheep pox can be complicated with respiratory tract, digestive tract and arthritis, and in severe cases it can cause sepsis and death. Erythema appears in the skin of the mouth, nose, orbit, breast, scrotum and medial thigh, forming papules, protruding from the surface of the skin, and then papules gradually expand to form grayish white or reddish solid nodules, with nodules all over the body in serious illness. eyelid swelling, blindness. Dyspnea, cough, pleuropneumonia changes on one side of the affected sheep, bronchial breathing sound and friction sound in auscultation.

Prevention

1. Pay attention to environmental hygiene, strengthen feeding and management, prevent pathogens from being introduced into healthy sheep, grasp fat condition, and properly supplement vitamin additives.

2. Strengthen quarantine, especially when introducing breeding sheep.

3. Sheep vaccinia chicken embryo attenuated vaccine was vaccinated in the epidemic area. 0.5 ml of each sheep was injected subcutaneously at the root of the tail. Immunity was produced 4-6 days after injection, and the immune period was 1 year.

4. Thoroughly disinfect the enclosure and sports ground with hot plant ash water and other disinfectants when the disease occurs. The sick sheep and healthy sheep should be kept in isolation and nursing should be strengthened. Dead sheep should be buried immediately to prevent the spread of the disease.

Treatment

1. Special effect method. The infected sheep were injected with sheep pox immune serum of 20ml / 50ml.

2. Symptomatic treatment. Scrub the affected part of the sick sheep with 0.1% potassium permanganate solution. You can also use honeysuckle vine, wild chrysanthemum decoction or light salt water to wash the affected part of the sick sheep, and then wipe it with iodine glycerin. After cleaning the affected area with vinegar water, salt water or 2% alum water, antibiotics can be injected to prevent secondary infection, and antiviral drugs such as poly-myocytic and virulent are injected at the same time.

3. Anti-virus injection can be used to treat virus. Secondary infection can be treated with penicillin, kanamycin mixture or cephalosporin, lincomycin, pefloxacin mesylate, ofloxacin, virulence, etc., with dexamethasone, Banlangen injection, astragalus polysaccharide injection, etc. for those with elevated body temperature, amikacin or enrofloxacin can also be injected intramuscularly or intravenously for 3-5 days.