Prevention and treatment of leptospirosis in geese

Leptospirosis is a febrile and septic infectious disease caused by Borrelia burgdorferi in geese and other poultry and wild birds. The main clinicopathological features were fever, diarrhea, hepatomegaly and splenomegaly and necrosis. The disease has a high mortality rate, and a large number of deaths are caused by the onset of the disease.

Leptospirosis occurs all over the world, but it is common in free-range poultry in tropical and subtropical regions.

1. Pathogen and epidemic characteristics.

Sick birds and dead birds and their feces are the main sources of infection of the disease. Susceptible birds come into contact with diseased and dead birds and their droppings, and the disease can be transmitted through the bites of arthropods, mosquitoes and bird mites. But the main transmission vector of the disease is the Persian sharp edge tick. Birds are naturally infected with diseases, which are often spread by tick claws.

The disease can occur in all seasons of the year, but it often occurs in warm and humid seasons.

two。 Clinical symptoms.

The incubation period of natural infection was 12 days, and the mortality rate was 33% MUE 77%. The sick poultry showed obvious clinical symptoms, such as poor spirit, necking and drooping wings, loose feathers, fever, elevated body temperature, loss of appetite, drowsiness, thirst, dysentery, excretion of large amounts of green faeces or accompanied by white uric acid, rapid weight loss, anemia, obvious weight loss, nerve paralysis, paralysis, the most coma, exhaustion and death. Very few sick birds can survive and recover slowly.

3. Prevention and control measures.

To eliminate intermediate hosts and vectors-Persian sharp edge ticks and mosquitoes and bird mites, 0.5% malathion bath can be used to control young ticks, and can also be sprayed and brushed with a solution of 50 mg / L of deltamethrin. Or spraying body surface feathers with pyrethroid insecticides can kill ticks on the body surface of birds. Avoid introducing tick-infested birds to healthy flocks in endemic areas. The application of antibiotics sensitive to the disease in sick poultry, such as penicillin, kanamycin, tylosin and so on, has a good curative effect. In foreign countries, researchers have tried spirochete inactivated vaccine to vaccinate 10-week-old poultry, which also has a certain preventive effect.