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Microtechnique for isolating fecal coliforms from soil.

P G Hartel, C Hagedorn

Applied and Environmental Microbiology

|August 1, 1983

Summary

A new microtitration method effectively isolates fecal coliforms from soil. This technique shows strong correlation with the standard most-probable-number procedure, offering a reliable alternative for microbial analysis.

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Area of Science:

Environmental microbiology
Microbial detection techniques

Background:

Fecal coliforms are key indicators of fecal contamination in environmental samples.
Accurate enumeration of fecal coliforms in soil is crucial for environmental health assessments.
Existing methods for fecal coliform isolation from soil can be labor-intensive.

Purpose of the Study:

To develop and validate a novel most-probable-number (MPN) microtitration technique for isolating fecal coliforms specifically from soil matrices.
To compare the efficacy and reliability of the new microtitration method against the established standard elevated-temperature MPN procedure.

Main Methods:

Development of a microtitration-based assay for fecal coliform enumeration.
Application of the microtitration technique to soil samples.
Statistical comparison of results obtained from the microtitration method and the standard elevated-temperature MPN method.

Main Results:

The developed most-probable-number microtitration technique demonstrated successful isolation of fecal coliforms from soil.
A high correlation coefficient (r=0.86) was observed between the microtitration technique and the standard method.
The 95% confidence interval for the correlation was [0.76, 0.92], indicating statistical significance.

Conclusions:

The MPN microtitration technique presents a viable and effective alternative for fecal coliform isolation from soil.
This method offers comparable accuracy to the standard procedure, potentially improving efficiency in microbial analysis.

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