Hymenolepis nana

Hymenolepis nana

Hymenolepis nana is the only cestode that does not require an intermediate host.

Echinococcus granulosus

Echinococcus granulosus

The Hydatid cyst of Echinococcus granulosus is the larval stage of this parasite which is highly toxic and antigenic to humans.

Taenia solium

Taenia solium

Pigs acquire the infection after consuming human feces contaminated with the tapeworm egg.

Taenia saginata

Taenia saginata

Taenia saginata is a large zoonotic tapeworm causing intestinal taeniasis in humans. It is also known as the beef tapeworm.

Diphyllobothrium latum

Diphyllobothrium latum

Diphyllobothrium latum is the longest parasite found in the intestine of man and causes diphyllobothriasis.

Balantidium coli

Balantidium coli

Balantidium coli is the only species in the genus Balantidium which is pathogenic to humans.

Toxoplasma gondii

Toxoplasma gondii

Merogony occurs in both definitive hosts and intermediate hosts. The sporogony and schizogony take place in the intestine of the definitive host.

Microsporidia

Microsporidia

They have a unique mechanism to infect host cells.

Cystoisospora belli

Cystoisospora belli

This opportunistic parasitic coccidian is closely related to the genus Cryptosporidium, Cyclospora, and Toxoplasma.

Cyclospora cayetanensis

Cyclospora cayetanensis

Cyclospora cayetanensis is the only species of the genus Cyclospora known to cause infection in humans called cyclosporiasis. The parasite, which is coccidian, causes infection of the gastrointestinal (GI) tract.