8 Questions
Which parasite is associated with Black spot disease?
Echinostoma ilocanum
What is the primary mode of transmission of Cryptocotyle lingua to humans?
Ingesting infected marine fish raw
Which parasite is associated with acute inflammation of the oviduct in birds?
Prosthogonimus ovatus
What is the common symptom of infection by Apatemon gracilis in pigeons and ducks?
Colic and diarrhea
Which parasite causes liver cirrhosis in animals like sheep and goats?
Dicrocoelium dendriticum
Which parasite can lead to peritonitis and pneumonia in host animals?
Paragonimus westermanii
What is the main source of infection for Troglotrema acutum in foxes and minks?
'Consuming infected leeches'
In which part of the body does Prosthogonimus ovatus cause perforation of bony walls?
'Frontal and ethmoidal sinuses'
Study Notes
Paragonimus westermanii (Lung Fluke)
- Infection occurs through ingestion of raw or undercooked crab or crayfish.
- Metacercaria encysts in the intestines, and the young flukes penetrate the intestinal wall and enter the peritoneal cavity.
- Flukes migrate to the lungs, where they become encapsulated by fibrous cysts, which always contain a pair of flukes.
- Cysts contain eggs and connect to bronchi channels, releasing eggs through sputum when they rupture.
Disease and Injury
- Migrating flukes cause peritonitis, pleuritis, myositis, and multifocal pleural haemorrhage.
- Chronic bronchiolitis and chronic eosinophilic granulomatous pneumonia can occur.
- Cysts can also lodge in other organs, including the brain.
- Paragonimus westermanii is endemic in the Bicol Region.
Other Parasites
Posthodiplostomum cuticula
- Causes haemorrhagic enteritis.
- Definitive host (DH) is a snail.
- Intermediate host (IH) is a snail.
- Mode of infection (MOI) is through ingestion.
- Primary site (PS) is the intestines.
Apatemon gracilis
- Definitive host (DH) is a fox or mink.
- Intermediate host (IH) is a freshwater snail.
- Mode of infection (MOI) is through ingestion.
- Primary site (PS) is the intestines.
Prosthogonimus ovatus
- Causes perforation of the bony walls of sinuses.
- Definitive host (DH) is a dog, cat, or wild carnivores, including man.
- Intermediate host (IH) is a freshwater snail.
- Mode of infection (MOI) is through ingestion.
- Primary site (PS) is the sinuses.
Other Parasites
- Planorbis species can infect through ingesting infected ants.
- Littorina littorae can infect through ingesting infected snails.
- Salmon poisoning occurs through eating raw infected Salmonid fish.
Learn about the life cycle of Paragonimus westermani, a parasitic fluke that infects humans through ingestion of raw crabs or crayfish. Understand how the flukes travel through the body, from the intestines to the lungs, where they form cysts containing eggs. Explore how the eggs are eventually released from the body through sputum.
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