Of the many parasitic infestations involving worms, pinworms are the most prevalent form of worm infestation. They affect approximately 200 million people all over the world, one-third of which can be found in the United States. Genus Enterobius or pinworm, is a parasitic roundworm belonging to the phylum Nematoda.
An enlarged spleen is not normal and occurs as a consequence of another underlying disease. An enlarged spleen is caused by infections (mononucleosis, toxoplasmosis, endocarditis); liver diseases (cirrhosis); cancer; inflammatory diseases (rheumatoid arthritis, sarcoidosis); trauma; and. infiltrated diseases (Gaucher disease, amyloidosis).
Most people with the disorder have abnormally low red blood cell counts (anemia). Symptoms may include an abnormally enlarged spleen or liver, lack of appetite, intermittent constipation and diarrhea, and/or abdominal pain.