FLUKES
Trematoda is a class within the phylum Platyhelminthes that contains
two groups of parasitic flatworms, commonly referred to as "flukes".
Trematode infection
Trematode infection are infections caused by organisms in the Trematoda class. Human infections are most common in Asia, Africa, South America, or the Middle East. However, trematodes can be found anywhere that human waste is used as fertilizer. Trematodes normally inhabit the digestive system and/or liver. Some trematodes seek out the lungs, or may wander to the heart, brain or skin. In the digestive system or liver, they disrupt digestion and nutrient absorption. Symptoms include chronic diarrhea and abdominal pain. Other symptoms occur from long-standing infections. These symptoms include ulcers, hemorrage and abscessess of the intestinal wall, and liver damage. Sometimes severe toxemia results when the host's body absorbs the worm's metabolites. The most common medications used to kill trematodes are praziquantel, niclosamide, or tetrachloroethylene. However, currently, only limited information about treating these infections is available.Trematode infections are usually acquired after ingesting one of the infective forms. Most fluke infections are acquired by (1) drinking infected water, (2) swallowing infected water while swimming; transmission from wet hands to mouth or nose, etc., (3) eating infected aquatic vegetation, or (4) eating infected raw meat or raw intermediate hosts (snails, shellfish, crustaceans, fish). (5) skin contact to infected water ( e.g. in schistosoma sp. ) One can kill trematodes by thoroughly cooking meats and vegetable taken from suspect waters. Salting, pickling, drying, and smoking does not always kill the parasites in meat.For more information view the source:Wikipedia