Parasitology - Liver Flukes and Related Cestodes

These flashcards cover essential concepts related to liver flukes and associated helminths in the study of parasitology.

What is the Phylum of Liver Flukes?

Phylum Platyhelminthes (flatworms)

What class and subclass do liver flukes belong to?

Class Trematoda, Subclass Diginea (Flukes)

What is the definitive host for Fasciola hepatica?

Vertebrates, including sheep, cattle, rabbits, and humans.

What is the first intermediate host for liver flukes?

Mollusks, specifically snails.

What are the primary symptoms of fascioliasis?

Anemia, diarrhea, enlarged liver, abdominal pain, and bottle jaw in cattle and sheep.

What treatment is commonly used for fascioliasis?

Praziquantel, Albendazole, and Triclabendazole.

What is the life cycle of Clonorchis sinensis?

Eggs leave with feces, enter snails where they develop, then enter fish as metacercaria, consumed by definitive hosts.

What is Dicrocoelium dendriticum known as?

Lancelet fluke, infecting cattle, goats, sheep, and rabbits.

What is the definitive host of Fascioloides magna?

Deer, moose, and elk.

What is the primary pathogenic feature of Schistosoma species?

They cause schistosomiasis, infecting venules of organs in humans.

How does Nanophyetus salmincola contribute to salmon poisoning?

It is a vector for E. A. of salmon poisoning, caused by Neorickettsia helmithocea.

What are the potential consequences of cercarial dermatitis in humans?

Itching and inflammation due to cercaria burrowing into skin.

What is the significance of Taenia saginata and Taenia solium?

They are beef and pork tapeworms, respectively, affecting humans and can lead to serious health issues.

What are the main symptoms of schistosomiasis?

Mild to chronic dysentery, abdominal discomfort, liver damage, and in some cases, blood in urine.

What treatment is effective against tapeworm infections?

Praziquantel.

How can humans become infected with Echinococcus granulosus?

By consuming oncospheres passed in feces of canids.

What is the pathology associated with Echinococcus multilocularis?

Can cause multilocular hydatids that may metastasize, leading to loss of liver function.