Dog Diseases – Canine Clonorchiasis

The pathogen of liver fluke in dogs and cats is mainly Clonorchiasis, which is parasitic in the gallbladder and bile duct.

Pathogen and life history

The body of Clonorchiasis is flat, soft, translucent, shaped like a sunflower seed, with a slightly pointed front end and a blunt back end. The body length is 10-25 mm. 3～5mm wide. The mouth sucker is slightly larger than the abdominal sucker, and the two are far apart.

The eggs are discharged with the feces and fall into the water. After being swallowed by the first intermediate host freshwater snails. In the snails, miracidia are hatched, and then they develop into larvae, rachis and cercariae. Cercariae escape from the snails and invade the second intermediate host freshwater fish or shrimp in the water, forming metacercariae. After the fish or shrimp containing metacercaria is swallowed by the final host, the larvae reach the bile duct from the common bile duct or through the intestinal wall through the bloodstream, and develop into adults in about 1 month.

Diagnosis points

In the endemic areas of this disease, there is a history of feeding dogs and cats with raw fish and shrimps. Clinically, indigestion, diarrhea, weight loss, anemia, and jaundice occur. When symptoms such as edema, the disease is suspected. Use washing precipitation method or formaldehyde ether precipitation method for fecal inspection, and the diagnosis can be confirmed by finding the eggs.

Prevention

First, in endemic areas, dogs and cats should be thoroughly examined and treated. Praziquantel, the dosage is 50～75 mg/kg body weight·time. oral. Or hexachloro-p-xylene. The oral dose is 50 mg/kg body weight, once a day for 10 days. Or prothiopyrazole, the oral dose is 30 mg/kg body weight. Once a day for 12 days.

Second, it is forbidden to feed dogs and cats with raw or undercooked fish and shrimp in the epidemic area, and fish ponds should be replaced with cow dung as fertilizer. It is forbidden to build pig pens or toilets next to fish ponds. Freshwater snails should be eliminated in the epidemic area. Canine paragonimiasis Paragonimiasis is also known as pulmonary leeches. Because the pathogen belongs to the genus Paragonimus, it is also known as Paragonimiasis. There are many types of Paragonimus, the most common of which is Paragonimus wesleyi, which is parasitic in the lungs, pleura and trachea of ​​dogs and cats.