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From the family of human parvoviruses, only parvovirus B19 is pathogenic. It is a causative agent of infectious erythema.
Toxoplasma gondii is an intracellular, parasitic protozoan and a causative agent of toxoplasmosis. Toxoplasmosis falls into the group of TORCH infections considered potentially harmful to a child’s development and to the health of pregnant women.
Listeria monocytogenes is a Gram-positive aerobic microorganism. It is a human pathogen.