Opisthorchis viverrini Among the options provided only opisthorchis viverrini has smaller than 100 pm i.e. they are < 30 pm in size Organism Clinical features Eggs * Adults live in small intestine of the Diagnosis is by definitive host operculated eggs Echino.storuin * Inflammation and ulceration of small in faeces ileocaxnum intestine may cause diarrhoea Size of the eggs "(intestinal with blood and abdominal pain are 80-140 by fluke)" * Acquired by eating raw or undercooked snails, clams, fish containing 58 x 90 pin Metacercariae larvae * Fasciola gigantica * Caused by ingestion of metacercaria Eggs are large "(liver. fluke)" lave 130-150um * The adults live in the biliary tract of the liver by 60-90 pm * It is caused by the ingestion of uncooked aquatic plants - Causes dyspepsia, anorexia, nausea, vomiting, abdominal pains, sometimes hepatomegaly and hepatic tenderness Opisthorcis * Liver fluke that inhabite the bile ducts 30 x .12 }dm in Viverrini of fish eating animals size "(liverfluke)" * Caused by ingestion of raw or * Undercooked freshwater fish * Abdominal discomfo gas and * Fatigue are typical * It is associated with cancer of bile duct Gastmdiscoides * Large fluke of pig and human Egg size is Hollings * Caused by ingestion of vegetation found in contaminated water 130 + 60 x ion * Can also be transmitted after eating infected fish that has not been cooled properly or at all * Humans are an accidental host because the patients can survive without the existence of man. However snail is necessary in the development of parasite.