protozoa

Entamoeba histolytica

disease:amebiasis

symptoms: diarrhea (sometimes bloody), stomach pain, cramping, fever, chills, nausea, vomiting, fatigue, and weight loss.

Direct or indirect

Giardia intestinalis

disease :Giardiasis

symptoms: watery, foul-smelling diarrhea (sometimes greasy), abdominal cramps, bloating, nausea, gas, fatigue, weight loss, and sometimes low-grade fever.

Direct or indirect

Plasmodium parasites

disease: malaria

symptoms: fever, chills, sweating, headache, muscle aches, fatigue, nausea, vomiting, and diarrhea

indirect

Toxoplasma gondii

disease: Toxoplasmosis

Symptoms: Flu-like symptoms: fever, muscle aches, swollen lymph nodes, fatigue

Severe disease in immunocompromised: encephalitis, neurological problems, eye issues (retinochoroiditis)

Direct or indirect

Trichanella spiralis

Trichinosis

Digestive symptoms can begin 1 to 2 days after infection. At this stage, you may have:

Loose stools.

Belly pain.

Tiredness.

Upset stomach and vomiting.

Later symptoms

About a week after infection, the adult female worms make larvae. The larvae go through the wall of the intestine and enter the bloodstream. They travel around the body and bury themselves in muscle tissue.

Each larva either forms a cyst around itself or buries itself in the muscle without a cyst. The larvae can live for months to years inside the muscle tissue.

Symptoms caused by having roundworms in muscle tissue most often start 2 to 8 weeks after infection. Symptoms include:

High fever and chills.

Muscle pain and tenderness.

Aching joints.

Swelling of the eyelids or face.

Weakness.

Headache.

Sensitivity to light.

Eye pain or pink eye, also called conjunctivitis.

Itchy skin.

Trichomonas vaginalis

Trichomoniasis

Symptoms:

Women:

Foul-smelling, frothy vaginal discharge

Itching, burning, or soreness in the genital area

Pain during urination or intercourse

Redness and swelling of the vulva or cervix

Men:

Most men do not have symptoms

May experience discharge from the penis, pain during urination, or discomfort during intercourse

Indirect or direct