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The attachment structures of bacteria are the

  • A.pili
  • B.fimbriae
  • C.colonization factors
  • D.all of the above

Answer: D

Correct answer: all of the above

All three are names for the structures by which bacteria stick to a surface. Fimbriae and pili are the short hair-like appendages themselves - the words are often used interchangeably, though pilus is also used for the longer sex pilus - and colonisation factors is the general term for the adhesins that let a pathogen attach to a particular host tissue. Attachment is the first step of almost every infection.

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