A positive bacteriological sample indicates the presence of bacteriological ______.

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Multiple Choice

A positive bacteriological sample indicates the presence of bacteriological ______.

Explanation:
When a bacteriological test on a sample comes back positive, bacteria were detected in the sample. That indicates bacteriological contamination rather than absence. Contamination means the water has unwanted organisms present. The other terms don’t fit: absence would mean no bacteria are detected, and quality or purity imply the water is free from contaminants, which a positive result does not indicate.

When a bacteriological test on a sample comes back positive, bacteria were detected in the sample. That indicates bacteriological contamination rather than absence. Contamination means the water has unwanted organisms present. The other terms don’t fit: absence would mean no bacteria are detected, and quality or purity imply the water is free from contaminants, which a positive result does not indicate.

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