1. Avian aspergillosis
Avian aspergillosis is a fungal disease of many birds caused by Aspergillus, which mainly damages respiratory organs. All kinds of birds are susceptible, but young birds are more common, acute and mass outbreaks are more common, the morbidity and mortality are higher, and adults are mostly sporadic. Most of the sick ducklings went through an acute course, characterized by listlessness, loss of appetite or extinction, neck stretching and mouth opening, dyspnea, abdominal breathing, partial ophthalmia, and sometimes serous secretions. In severe cases, yellow cheese-like substances appeared under the blink membrane, which made the eyelids protrude, formed ulcers in the center of the cornea, and finally suffocated and died. Some people have neurological symptoms before they die. Most of them died within 1 ~ 3 days after onset, and some of them were extended to 5 ~ 7 days. Dead ducks are stiff.
rectal?prolapse;?prolapse?of?the?anus
It is mainly a disease caused by the transfer of fallopian tube or cloaca out of anus in breeding ducks, which is easy to occur in primiparous or high-yield female ducks. The inducing reasons are: the feeding density of laying hens is too high; The mother duck is overweight; After opening up, the feed intake of female ducks increased sharply; Protein content in diet is too high; The mother duck starts to give birth too early or too late; Lack of vitamin A and vitamin E in diet and some pathological factors. Heavy female ducks are mostly bad after being cured and have no therapeutic value. Once rectocele is found, it should be isolated immediately and treated in time. Female ducks with mild symptoms can wash off carrion with warm 0. 1 potassium permanganate solution or 2-3 boric acid solution, and apply hot compress on their backs 3-4 times a day. If there is inflammation in the molting area, apply purple liquid medicine, and evenly sprinkle anti-inflammatory powder or oxytetracycline powder, slowly recover and repeat.
3. Duck viral hepatitis
This is an acute infectious disease of ducklings, with a mortality rate as high as 90%, which mainly harms ducklings of 4~ 10 days old. The pathogen is an enterovirus, and the incubation period after infection is 1~4 days. Sudden onset and rapid spread. The sick duck is listless, his eyes are half closed, he is sleepy, he has nervous system symptoms, dyskinesia, his body leans to one side, or his back is to the ground, he turns in circles, his feet move spasmodically, his head leans back, and his horn arch is reversed. He died within minutes to hours after the above symptoms appeared. At autopsy, the liver was swollen and fragile, and there were bleeding spots or spots of different sizes under the capsule. The gallbladder is swollen and full of bile. The kidneys and spleen sometimes swell.