<unk>  causes gastroenteritis, with the extent of the illness varying based on age, condition of the host, and size of the infectious dose. Symptoms include "watery diarrhea, loss of appetite, weight loss, abdominal bloating and cramping, increased flatulence, nausea, fatigue, and low-grade fever", though this can be augmented in more severe cases by vomiting, substantial weight loss, excessive diarrhea, and muscle aches. Typically, patients with a persistent watery diarrhea lasting over several days may be suspected of harboring the disease, especially if they have traveled to a region where the protozoan is endemic. The incubation period in the host is typically around a week, and illness can last six weeks before self-limiting. Unless treated, illness may relapse. The more severe forms of the disease can occur in immunocompromised patients, such as those with AIDS. Human<unk> asis is clinically similar to cryptosporidiosis, isosporiasis, giardiasis and microsporidiosis because of the similar clinical features. Flu like syndrome with myalgias and arthralgias may precede the onset of diarrhea. Fever is low grade and is unusual. There is presence of moderate to severe dehydration, compensatory tachycardia, systolic blood pressure (SBP<90 mmHg) and decreased skin turgor may occur. But mild infection produces few or no clinical symptoms. The immune system may determine the appearance of symptoms; that is, from symptomatic to asymptomatic stage depends on resistivity of the immune system.
Cyclospora cayetanensis
Alternaria tenuissima
Diphyllobothrium dendriticum
Entamoeba moshkovskii
Basidiobolus ranarum
Echinostoma revolutum
Naegleria fowleri
Trichobacteriosis axillaris