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Comparison of methods for enumerating fluorescent bacteria.

W F McTernan, J C Adams, P A Rechard

Applied Microbiology

|January 1, 1974

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This study shows that both the most-probable-number (MPN) procedure and spread plating on modified Henrici agar yield comparable counts of fluorescent bacteria. These methods offer reliable quantification for bacterial enumeration in various applications.

Area of Science:

Microbiology
Bacteriology
Analytical Methods

Background:

Accurate enumeration of bacterial populations is crucial for environmental monitoring and industrial applications.
Traditional methods for quantifying bacteria, such as the most-probable-number (MPN) procedure, are widely used but can be labor-intensive.
Alternative methods are sought to provide comparable accuracy with potentially improved efficiency.

Purpose of the Study:

To compare the efficacy of the most-probable-number (MPN) procedure with spread plating on modified Henrici agar for enumerating fluorescent bacteria.
To determine if modified Henrici agar provides a viable alternative for bacterial quantification.

Main Methods:

Bacterial samples were analyzed using both the most-probable-number (MPN) procedure.

Related Experiment Videos

Simultaneously, spread plates were prepared using modified Henrici agar for bacterial culture and enumeration.

Fluorescent bacterial counts were compared between the two methods.

Main Results:

Both the most-probable-number (MPN) procedure and spread plating on modified Henrici agar produced comparable numbers of fluorescent bacteria.
The results indicate that modified Henrici agar is effective for quantifying fluorescent bacterial populations.

Conclusions:

Modified Henrici agar offers a reliable alternative to the most-probable-number (MPN) procedure for enumerating fluorescent bacteria.
This finding supports the use of spread plating on modified Henrici agar as an efficient method for bacterial quantification.