<unk>  vermicularis
Colloquially known as Pinworm (United States), Treadworm (UK and Australia) or Seatworm
Worldwide distribution
Risk factors (prevalence can reach up to 50% in these populations):
Age under 18
Institutionalized
Cohabitation with infected individual
Humans only known reservoir
Transmitted by fecal-oral route
Can survive outside of body for up to 3 weeks
Age under 18
Institutionalized
Cohabitation with infected individual
Enterobius
Idiopathic pruritus ani
Salmonella
Rectal tenesmus
Escherichia coli
Taenia saginata
Clostridium difficile 
Taenia solium 