Preventive measures for diseases of cultured nutria

In addition to specific prevention of nutria infectious diseases, the epidemic prevention and quarantine system should be strictly observed, and the veterinary health order of the farm and feed preparation room should be maintained. The specific measures are as follows:

(1) the entry of off-site personnel into the farm shall be strictly controlled or prohibited, subject to the approval of veterinarians and farm leaders if necessary, and only after sanitary disinfection.

(2) after the breeders have finished their work, the overalls and boots should be sent to the sanitary disinfection room and can be reused after disinfection. Never wear overalls home, or enter the venue without overalls, in case pathogens are brought into the field.

(3) A disinfection trough should be set up at the entrance and exit of the farm for disinfection when the staff go in and out. Its specification, 1.5 meters long, 1 meter wide, sawdust mixed with disinfectant (2Mel 596 grams Liao Lin or Lysuer) is placed in the tank. In order to disinfect the production motor vehicles, a large disinfection tank is set up at the entrance of the field, which is 0.4m deep, 2.5m wide and 8m long. the tank is filled with water (2096 salt solution is put in winter), and disinfectants are added when the vehicle is disinfected. such as caustic soda, keliolin and so on.

(4) the farm should always be kept clean, the nest and the playground should be cleaned every other day, the field should be cleaned twice a week, and the tableware should be cleaned and disinfected regularly.

(5) autopsies must be performed in the veterinary clinic. Dissected corpses and their contaminants should be burned or buried deeply, and appliances should be thoroughly disinfected. The enclosure where sick rats have been raised should be disinfected in time.

(6) the feed processing room is the heart of the whole farm. Every day, the feed fed by the whole field is processed and distributed here, so the hygiene of the room is directly related to the health of the animals. After processing the feed every day, disinfect the machinery and utensils with 2mur396 hot sodium bicarbonate aqueous solution.

(7) veterinarians should strictly inspect all kinds of diets of nutria. Check the freshness and bacterial culture rate of each batch of feed, and check the toxicity of salt and minerals if necessary. According to their appearance, smell, taste and mildew degree, all kinds of feed entering the feed blending room can be divided into three categories, namely, fresh feed, slightly deteriorated feed and severely deteriorated feed. A small amount of slightly deteriorated feed should be used cautiously after thermal disinfection, while the use of severely deteriorated feed is strictly prohibited.

(8) the water in drinking water and swimming pool should always be kept clean and the reproduction of pathogenic microorganisms should be strictly controlled. Microbiological tests should be carried out quarterly for drinking water and water in pools.

(9) in order to improve the resistance of rodents to various diseases, it is necessary to establish a healthy basic population. Once diseased mice are found in the basic group, such as those suffering from ringworm, tuberculosis, mastitis, severe trauma, chronic gastroenteritis and paralysis, and weak mice, they should be eliminated immediately, and adult mice with good traits should be selected from the descendants of healthy parents, in order to supplement the population deficiency.

(10) Breeders are strictly prohibited from raising livestock and poultry at home, while putting an end to infectious vectors of nutria, such as cats, dogs, domestic rats and wild rats, to enter the farm.

(11) strictly abiding by the quarantine system is of special significance to the prevention of infectious diseases. The imported and exported nutria must be placed in a quarantine enclosure for quarantine observation for a period of 30 per cent for 45 days, and only those without disease can be admitted and sold.

For nutria in the farm, regular vaccination and necessary diagnostic examinations must be carried out in order to effectively prevent the occurrence of infectious diseases. For example, nutria vaccination against salmonellosis, colibacillosis and pasteurellosis, and diagnostic tests for coccidiosis and ringworm. According to the specific conditions of the farm, when vaccination is needed in large groups, 50 to 100 nutria are selected for experimental vaccination under the guidance of veterinarians. After 5-Mel observation for 7 days, no adverse reactions can be vaccinated in large groups. If there is a local abscess or serious illness or death after vaccination, the use of this biological product is strictly prohibited, and other products should be replaced immediately.