Diplozoon paradoxum is a flatworm parasite of fish. Eggs hatch and pass through larval stages where they swim to try to find a fish host....

Ophiocordyceps sinensis, or caterpillar fungus, is a parasitic fungus that infects caterpillars of ghost moths. Permissive hosts include...

Phrixocephalus cincinnatus begin their life as free-swimming larvae (called a nauplii) (1). After developing to their next larval stage...

Cotesia congregata is a parasitoid wasp found throughout North America and South America (1). The wasps parasitize caterpillars of sphinx...

Myrmeconema neotropicum is a nematode parasite that infects ants. The eggs can also use birds for transportation (a paratenic host). Eggs...

Ixodes scapularis, the deer tick or black-legged tick, must feed on blood at each stage of its development. Consequently, it has a...

Haemonchus contortus females look like a barber’s pole because their white ovaries spiral around their intestine and they consume so much...