Labrador Hound (details)
Dog black fever is a chronic parasitic disease co -suffering from human and animals caused by the raw worm of Du's Lishman. The disease is mainly parasitic in the dog's internal organs. The sick dogs will have corresponding symptoms such as hair removal, skin rash, and malnutrition. Depending on the source of infection, black fever can be divided into three types: human source, canine sources, and wildlife sources.
In its development, Lishman's raw worm mainly has two forms: whip and hair bodies and front whip hair bodies. The insect without a whip hair body is very small, with a size of 2.9 ~ 5.7 / um*l.8 ~ 4.0um. After dyeing with Rui, the cytoplasm of the worm is light blue, the nucleus is red, round, and is always biased to the At one end of the worm body, the active body is purple -red and fine, located in the center of the worm or the other end. The front whip and hair body is thin and long -length, 11.3 ~ 15.9um long, the front part is wide, the back of the back is narrow, and the front end has a freelance whip hair. In the fresh specimen, the whip and hair can be seen continuously, and the body movement is very active. The insect body is mainly parasitic in the mesh endothelial cells of the blood, bone marrow, liver, spleen and lymph nodes of the dog's dogs, and constantly destroy the cells.
Natural infection is transmitted by sucking insects. When female bite patients, sick dogs, or other diseased animals, blood or skin -free wool bodies are sucked into the stomach of the White Rong, and then developed into the front whip and hair body in the White Cymbicida. The Ministry movement enters the mouth and beak on the 7th day. When Bai Yan bites healthy animals again, the mature front whip hair body enters the healthy animal body, and then loses the free whip hair, becomes a whip caterpillar body, and reaches all parts of the body with the blood circulation, which causes infection.