Question 16 · LDEK · Environmental epidemiology
Coliform index means:
- A. smallest volume of water in cm³ containing at least one bacterial cell of the coli group.
- B. total number of colon bacilli Escherichia coli occurring in 1 dm³ of a tested water sample.
- C. total number of psychrophilic bacteria.
- D. total number of mesophilic bacteria.
- E. ratio of the number of psychrophilic bacteria to the number of mesophilic bacteria.
Hint
Distinguish the coli index from the coli titre: one is a count per volume, the other is the smallest volume containing a bacterium.
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