Protozoa:

Resistance to chlorine

Balantidium coli

High

Blastocystis hominis

High

Isospora belli

High

Microsporidia

Moderate

Toxoplasma gondii

High

Helminthes:

Fasciola spp.

High

Free-living nematodes (other than Dracunculus medinensis)

High

Schistosoma spp.

Moderate