Doctors in Belgium met with a real head-scratcher when an 83-year-old married man came in with a rare form of secondary syphilis—the second of four stages of the sexually transmitted bacterial ...
Protozoa are tiny, single-celled organisms that can cause diseases like malaria, giardia, and toxoplasmosis. Protozoan infections can be identified through blood, stool tests, or biopsies. Protozoa ...
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