Dipylidium caninum (dog tapeworm)

Images:

Egg packets:
http://www.k-state.edu/parasitology/625tutorials/Tapeworm06.html
Scolex and mature proglottid:
http://www.k-state.edu/parasitology/625tutorials/Tapeworm01.html

Composite:

Phylogeny:
Class Cestoda Order Cyclophyllidea

Preferred definitive host:
Domestic dogs and cats

Reservoir hosts:
Humans, particularly children

Vector/intermediate host:
Fleas

Geographical location:
Cosmopolitan

Organs affected:
Small intestine

Symptoms and clinical signs:
Usually none, although abdominal pain, headache, diarrhea, and verminous intoxication may occur, particularly in patients with heavy infection.

Treatment:
Niclosamide, quinacrine, or praziquantel.