SN/T 4662-2016Quarantine protocol for mink viral enteritis (English PDF)

4.1 Clinical features

In the early stage of illness, the leeches are depressed, the appetite is reduced or abolished, the thirst is obviously enhanced, and the body temperature rises above 40 °C. Symptoms of gastrointestinal disease Obviously, vomiting yellow-green watery or porridge-like substance, diarrhea, discharge of soft to watery or pus-like feces, then visible blood in the stool, mucous membrane shedding and undigested feed residue, mucus and a lot of air bubbles, some mixed with bloodshot or blood clots. The most characteristic difference from the general squat is that There is a hollow tube in the feces that is mostly grayish white, sometimes pale yellow or pink, dull and fleshy. It is called a mucus tube or mucous membrane.

Column, which consists of exfoliated intestinal mucosa, fibrin, and intestinal mucus. Another characteristic of this disease that is different from other enteritis is that during the peak period of onset, the group of faeces is in a variety of colors, such as pink, bright red, dark red, black red, grass green, dark green, light yellow, orange, dark yellow, light gray and dark gray.

See Appendix A for other details.

4.2 Pathological changes

Mainly in the gastrointestinal tract, the small intestinal mucosa is fibrin, necrotic, hemorrhagic inflammation. Extreme expansion of the intestine when it is normal 1 to 2 times, the wall is very thin and nearly transparent, especially in the jejunum and ileum. The intestinal lumen is filled with gas or thin contents. Due to bleeding the appearance of the intestines is bright red or dark red, black red, and the contents are red or dark brown soy sauce. In some cases, the colorectal mucosa is visible.

Bleeding, the intestinal contents contain a large amount of dark red or yellow-green viscous cellulosic material. Fibrinous in the intestinal wall of subacute and chronic cases Necrotic foci. The stomach is dilated, the wall is thin, and it is balloon-shaped, containing a thin sauce-like contents. Mucosa at the bottom of the stomach and pylorus, congestion, shedding, a bit or plaque Bleeding. In some cases, there are multiple ulcers on the stomach wall. Gallbladder expansion is significant, full of yellow-green or black-green viscous bile. Hepatomegaly, fragile texture, Mostly dark red. Some cases have spleen, kidney swelling, and necrosis. There is bleeding point in the epicardium, and the myocardium is soft and degeneration.