Hymenolepis diminuta (rat tapeworm)

Images:

Ova:
http://www.k-state.edu/parasitology/625tutorials/Hymenolepis.html

Phylogeny:
Class Cestoda, Order Cyclophyllidea

Preferred definitive host:
Rats

Reservoir hosts:
Humans, particularly children.

Vector/intermediate host:
Tribolium and/or Tenebrio beetles

Geographical location:
Cosmopolitan

Organs affected:
Small intestine

Symptoms and clinical signs:
Usually none

Treatment:
Niclosamide or paromomycin