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Vibrio bacteria naturally live in

  • A.coastal salt and brackish water
  • B.inland freshwater lakes only
  • C.dry soil well away from the coast
  • D.the human intestine and nowhere else

Answer: A

Correct answer: coastal salt and brackish water

Vibrio species are part of the natural marine flora, particularly in warm coastal and estuarine water, and their presence indicates nothing about sewage contamination. This is why they cannot be eliminated at source and why shellfish harvesting controls concentrate on temperature and on treatment after harvest.

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