Answer :
Answer:
Explanation:
It's unlikely to have a sample that is positive for E. coli but not for coliform bacteria because E. coli is a type of coliform bacteria. Coliform bacteria are a broad group of bacteria found in the environment, including the intestines of warm-blooded animals, and they serve as indicators of fecal contamination. E. coli is a specific subgroup of coliform bacteria that is commonly found in the intestines of humans and animals.
When testing for coliform bacteria, laboratories typically use methods that detect a broader range of coliforms, including E. coli. If a sample tests positive for E. coli, it would also test positive for coliform bacteria because E. coli is considered a subset of coliform bacteria. Therefore, it would be highly unusual for a sample to be positive for E. coli but negative for coliform bacteria, as E. coli is one of the organisms used to indicate the presence of coliforms.
