What is the rarest germ that you have come across?

Question: What is the rarest germ that you have come across?
- Keywords:
  bacteria,
  rare,
  virus
Asked by ClassHimid to Bruno Silvester L on 21 Mar 2024.
- Bruno Silvester Lopes answered on 21 Mar 2024:
  
  Treponema species that are present in mouth tartar/plaque are difficult to grow… I’ve seen those as an undergrad while studying at uni. they look spiral in shape