The "O" in the name of E. coli O157:H7 refers to..........whereas the "H" refers to the .............

Options :
  1. Oval shape...............sub-species
  2. Cell wall (somatic) antigen number.........flagella antigen
  3. Ohio State in USA..........Initials of the patient along with the number
  4. None of the above
Answer and Explanation :-

Answer: Option 2

Explanation:

E. coli serotype O157:H7 is a Gram-negative, rod-shaped bacterium. The "O" in the name refers to the cell wall (somatic) antigen number, whereas the "H" refers to the flagella antigen. Other serotypes may also cause illness, though usually less severe. Other bacteria may be classified by "K" or capsular antigens.

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