sleeping sickness

noun5

1. •
   Any of several diseases of which lethargy is a major symptom.
2. •
   Especially, African sleeping sickness, an endemic infectious disease of humans and animals in tropical Africa, caused by a parasitic trypanosome.
3. •
   Animal trypanosomiasis.
4. •
   Eastern equine encephalitis, caused by a zoonotic alphavirus and arbovirus present in North, Central and South America and the Caribbean.
5. •
   Encephalitis lethargica, a form of encephalitis, of unknown cause, that swept the world in the 1920s.