Question

If coliform bacteria are native to human colons, why the big concern over coliform contamination?...


If coliform bacteria are native to human colons, why the big concern over coliform contamination?

Transcribed: Table 4 MPN Index" (MPN Index Based on 95 Percent Confidence Limits) Number of tubes giving positive reaction out of Number of tubes giving positive reaction out of 5 undiluted samples (dilution factor-1) 5 dilutions of 10 (dilution factor-10) 5 undiluted samples (dilution factor-1) 5 dilutions of 100 5 dilutions of 10 5 dilutions of 100 (dilution factor-100) MPN Index MPN Index (dilution factor-100) per 100 ml. (dilution factor-10) per 100 ml <2 1 26 2 3 27 2 3 33 4 34 1 5 23 1 30 1 1 4 40 1 1 5 30 1 6 1 1 50 4 5 1 60 2 7 50 70 9 5 2 90 2 9 5 3 80 2 3 12 3 110 3 3 140 1 11 5 3 3 170 3 11 5 130 14 170 3 14 220 3 17 5 4 280 13 5 4 350 1 17 240 1 17 5 1 300 21 5 500 1 26 900 2 22 4 1600 5 2 1600 *Multiply the MPN Index by the smallest dilution tactor from the series used when dilutions other than 1, 10, and 100 are used. Standard Methods for the Examination of Water and Wastewater, 10th ed.

Answer

According to the question, we have to mention the solution of the question asked above i.e. If coliform bacteria are native to human colons, the reason for the big concern over coliform contamination. So, let us have a look at the solution.

Coliform bacteria are the kind of organisms that are present in the environment and in the feces of all warm-blooded animals and humans. These types of bacteria will not likely cause any illness to animals including humans. Though, their presence in the drinking water indicates that there is a possibility of disease-causing causing organisms like pathogens could be there in the water system and that can be harmful to the Humans if they drink or take it. So, we can say that although they are native to the human colon, if they are found in an open environment like a water system, it should be a big concern over coliform contamination.

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