what is an alternative method to MPN method for determining faecal coliform concentration in water samples using a reference

find a scientific journal (reference) that proves that the Membrane filtration method is better than the MPN method for determining the concentration of faecal coliforms in water samples.

explain what the positive and negative results by using the MPN method using macconkey agar to determine faecal coliform concentration?

write a hypothesis clearly outlining the independent and dependent variables for the following aim of an experiment: To determine the presence of gram-negative bacteria, i.e. faecal coliforms, in water samples collected at six different sampling sites along the Patterson River, by quantifying the concentration of faecal coliforms through conducting the ONPG Test (Colilert Method) and the Most Probable Number (MPN) Test. Moreover, the attainment of these measures will be compared with permissible governmental standards, known as the EPA guidelines, and suitability for primary and secondary recreation contact recreation evaluated.

A sample taken from a sewage treatment plant is likely to have too many bacteria to count directly. What would be best done when determining the numbers of viable bacteria in the sample? Group of answer choices Filtration then spread plating the filtrate Serial dilution and spread plating the dilutions 16-streak plating of the wastewater sample All of the other answer choices are correct Optical density reading in a spectrophotometer

What is a common test to determine fecal contamination?Group of answer choicesMicroscopic Particulate AnalysisHeterotrophic Plate CountDensity Mass Ratio