Table 3: Zoonotic parasite etiology in the united states.
| Genus Species | Disease | Pathogen | Structure |
| Entamoeba Histolytica | Amoebic Dysentery [63]. | Parasite(Protozoa) | Trophozoite , ameboid, actively motile |
| Giardia Lamblia | Giardiasis [63]. | Parasite(Protozoa) | Flagellate trophozoite |
| Balantidium coli | Balantidiasis [63]. | Parasite (Protozoa) | Ciliated trophozoite |
| Toxoplasma Gondii | Mental retardation, encephalitis, vision impairment in infant [63]. | Parasite (Protozoa) | Mature oocytes have eight infective sporozoites |
| Toxocara genus T canis , T felis | Visceral larva migrans and Ocular larva migrans [63]. | Nematodes | Larvae are 400 μm × 20 μm long |
| Ascaris lumbricoides | Strongyloidiasis [63]. | Nematodes | Females are up to 30 cm long |
| Trichinella spiralis [63]. | Triad of myalgias, periorbital edema and eosinophilia [63]. | Nematodes | Female is viviparous and 4 mm × 60 μm |