People acquire the infection by consuming. The main symptoms are abdominal cramping and diarrhea. read more and cryptosporidiosis Cryptosporidiosis Cryptosporidiosis is an intestinal infection caused by Cryptosporidium, a protozoan parasite. read more, and intestinal infections, such as giardiasis Giardiasis Giardiasis is an infection of the small intestine caused by the single-celled protozoan parasite Giardia. Infection occurs when people unknowingly ingest toxoplasma cysts from cat feces or eat contaminated meat. read more (a sexually transmitted infection), toxoplasmosis Toxoplasmosis Toxoplasmosis is infection caused by the protozoan parasite Toxoplasma gondii. read more and the protozoa that cause trichomoniasis Trichomoniasis Trichomoniasis is a sexually transmitted infection of the vagina or urethra that is caused by the protozoa Trichomonas vaginalis and that causes vaginal irritation and discharge and sometimes. Examples are pinworms Pinworm Infection Pinworm infection is caused by the intestinal roundworm Enterobius vermicularis and usually affects children, but adult members of their households and caregivers, institutionalized people. Some parasites are common in the United States and other industrialized countries. Ascariasis worm Ascariasis worms are typically pink or white with tapered ends. Adult worms, which reproduce, can be more than a foot (30 centimeters) long. These worms are parasites that use your body as a host to mature from larvae or eggs to adult worms. Parasitic infections may occur in places with poor sanitation and unhygienic practices (as occurs in some psychiatric hospitals and day care centers). Ascariasis (as-kuh-RIE-uh-sis) is a type of roundworm infection. read more or who take medications that suppress the immune system-called immunosuppressants). Browse 3,921 authentic human parasite stock photos, high-res images, and pictures, or explore additional tapeworm or. read more (such as those who have AIDS Human Immunodeficiency Virus (HIV) Infection Human immunodeficiency virus (HIV) infection is a viral infection that progressively destroys certain white blood cells and is treated with antiretroviral medications. Such invaders include Microorganisms (commonly called germs, such as bacteria, viruses, and fungi) Parasites. In the United States and other industrialized countries, parasitic infections tend to affect mainly immigrants, international travelers, and people with a weakened immune system Overview of the Immune System The immune system is designed to defend the body against foreign or dangerous invaders. A person who visits such an area can unknowingly acquire a parasitic infection, and a doctor may not readily diagnose the infection when the person returns home. Most parasitic infections are more common in tropical and subtropical areas, and intestinal parasites are often linked to areas with inadequate sanitation.
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