Foot and mouth disease symptom picture?

summary

Foot and mouth disease (aftosa) is a kind of acute, hot and highly contact infectious disease of artiodactyls caused by foot and mouth disease virus. It mainly invades artiodactyls and occasionally occurs in humans and other animals. The clinical features were blisters in oral mucosa, hoof and breast skin. Foot and mouth disease symptom picture? Let's talk about it

Foot and mouth disease symptom picture?

The incubation period of the disease is 1-7 days, with an average of 2-4 days. The sick cattle are depressed, shut up, salivate, and suck when they open their mouth. Their body temperature can rise to 40-41 ℃. 1 to 2 days after the onset of the disease, the blister of broad bean to walnut can be seen on the gums, the tongue surface and the inner lip of the sick cow. Feeding and rumination stopped. The blister ruptures in about a day and a night, forming an ulcer. At this time, the body temperature will gradually drop to normal.

When blisters occur in the oral cavity or later, blisters also occur on the soft skin between the toes and hoof crowns, which will soon burst and then gradually heal. Sometimes blisters can be seen on the nipple skin. The disease is usually benign, and can be cured after a week or so; If there is a lesion in the hoof, it can be delayed to 2-3 weeks or longer; The mortality rate is 1% - 2%. This disease type is called benign foot-and-mouth disease.

In the process of blister healing, some sick cattle suddenly get worse, their whole body is weak, their muscles are trembling, their heart beats faster, their rhythm is uneven, their appetite is exhausted, their rumination stops, their walking swings and their standing is unstable, and they often die suddenly due to heart paralysis. This disease type is called malignant foot-and-mouth disease, and the death rate is as high as 25% ~ 50%. The main manifestations of the disease are hemorrhagic gastroenteritis and myocarditis, and the mortality is very high.

matters needing attention

In case of suspected foot-and-mouth disease, the sick animal should be immediately reported to the veterinary authority, the sick animal should be blocked on the spot, and the utensils and contaminated ground should be disinfected with 2% caustic soda. After confirmation, a series of work such as strict blockade, isolation, disinfection, prevention and control were carried out immediately. After slaughtering, the sick animals should be treated innocuously. When the staff go out, they should be disinfected completely. The leftover forage or drinking water of the sick animals should be burned or buried deeply. The livestock house and nearby should be sprayed with 2% caustic soda, sodium dichloroisocyanurate (containing more than 20% available chlorine) and 1% ~ 2% formalin for disinfection, so as to avoid spreading the poison. Vaccination. Cattle and sheep around the epidemic area should be vaccinated with the same type of FMDV as the local epidemic. The dosage, injection method and precautions should be strictly in accordance with the instructions of the vaccine.