Diseases and Prevention in Rabbits - Rabbit Bunny (Rabbit Hemorrhagic Disease)

First discovered in Jiangsu Province, China. It is characterized by rapid onset, insignificant symptoms, rapid death, rapid transmission, high morbidity and mortality. [pathogen] rabbit haemorrhagic fever virus, spherical shape, icosahedral symmetry structure; can agglutinate human type A; exists in diseased rabbits in the body tissues and organs, but the heaviest in the liver, followed by the lungs , spleen, kidneys, and intestinal lymph nodes. Insensitive to sulfa drugs and antibiotics, commonly used disinfectants are sodium hydroxide solution and lime milk. Only rabbits were infected but other experimental animals were not susceptible to infection. Blue and adult rabbits over 5 months old had the highest susceptibility to acute death. The diseased rabbits within 5 months of age were mostly chronically infected. The suckling rabbits were generally not affected; the rabbits were infected. The path to disease is through the respiratory tract, digestive tract, wounds, and mucous membranes. The disease can occur throughout the year, with more seasonal illness occurring in early spring and autumn and winter temperatures. [Symptoms] are generally divided into the most acute type, acute type, and chronic type. The most acute type: more common in the early stages of the epidemic, the diseased rabbits had no obvious symptoms before their death, and most of them suddenly screamed and died at night. Typical cases were bleeding from the nostrils and visible mucous membranes. Acute type: more common in the prosperous period. Diseased rabbits are depressed, do not eat or eat less, their coats are greatly reduced in luster, body temperature is 20C, thirsty desire is increased, redness of the ear shells; shortness of breath, visible mucous membranes; partial constipation, dry and hard stools, often with pale yellow mucous masses and even bloodshots Sometimes diarrhea, hematuria, short-term excitement before dying, mad running, convulsions, trembling body, mouth bite cage, and then forelimbs, hind limbs, limbs kept rowing, and finally twitching death, screaming before death, horn Bow reversed. Duration of 21 days. Chronic type: more common in young rabbits during late epidemics or weaning, with a longer incubation period and duration, lack of energy, reduced or absent appetite for 21 days, thirst for desire, short weight loss, and a course of more than 1 day can be restored, but Still detoxifies other rabbits. [Pathological changes] Severe hemorrhage and hemorrhage of the nasal cavity and tracheal mucosa, especially the tracheal ring, the appearance of a "red trachea", and a large number of erythrocytes, ranging from miliary to mung bean; and congestion, edema, and hemorrhage of the lungs. Pericardial effusion was pale or reddish, pericardial punctate hemorrhage, myocardial relaxation, needlepoint hemorrhage; hepatic congestion, enlargement, hepatic lobular stromal broadening, hepatocyte cords evident; renal congestion, swelling, Dark red, cortical with scattered needle tip large bleeding points, and grayish yellow or grayish necrotic area, the appearance of lentigines; brain and meningeal vascular congestion, pineal gland and pituitary gland with clot; intestinal mucosa, uterus Mucosal and lymph node hyperemia. [Diagnosis] According to the characteristics of the disease, the incidence is rapid, the treatment is invalid, the incidence and mortality rate is high, more than 5 months of the rabbit acute death, more than 5 months is chronic, lactation is generally not diseased rabbits; pathological changes are mainly respiratory Organ bleeding, brain and meningeal congestion, pineal gland and pituitary gland with blood clots, can make a new diagnosis. Further diagnosis can be combined with laboratory diagnosis, using red blood cell agglutination test and red blood cell agglutination inhibition test, and diagnosis can also be made by neutralization test. [Prevention and Prevention] 1. Do a good job in daily health and epidemic prevention work. It is forbidden to import diseased rabbits from the affected area and breed them to the outside. Regularly use Weidao brand disinfectant with rabbit spray or caustic soda and grass and gray water for disinfection. The inactivated rabbit inactivated vaccine was injected into the neck or the inside of the thigh, 1 ml of adult rabbits and 20 ml of young rabbits. The mice were immunized again 15-20 days after injection and subcutaneously injected with 1 ml. The immunization period was about 3 months. Unvaccinated pups should be immunized at 32 days of age, and the immunization group should be immunized around the age of 5 days. In the event of rabbit plague, rabbit farms should be blocked immediately to isolate diseased rabbits. Dead rabbits should be buried or destroyed. Rabbithouses and utensils should be thoroughly disinfected. Healthy rabbits can be injected subcutaneously or intramuscularly with high-safety serum, 30 ml per kilogram of body weight. The rabbits were inoculated again after a few days. 2. There is no good treatment for this disease. China Agricultural Network Editor

Posted on June 10, 2018