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A simple method to detect bacteriolytic enzymes produced by enterobacteriaceae

G Branca¹, C Galasso, G Cornaglia

¹Istituto di Microbiologia dell'Università Cattolica del Sacro Cuore, A. Gemelli, Facoltà di Medicina, Roma, Italy.

Microbios

|January 1, 1996

Summary

Certain Enterobacteriaceae, including Serratia and Proteus, produce bacteriolytic enzymes. This enzyme production was most effectively detected using peptone-based media with killed Gram-negative cells.

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Area of Science:

Microbiology
Enzymology

Background:

Enterobacteriaceae are a diverse family of Gram-negative bacteria.
Bacteriolytic enzymes play a role in bacterial cell lysis and interaction.

Purpose of the Study:

To investigate the production of bacteriolytic enzymes by various Enterobacteriaceae species.
To identify optimal growth conditions for detecting bacteriolytic enzyme activity.

Main Methods:

Culturing of Enterobacteriaceae species on peptone-based media.
Inclusion of killed Gram-negative cells in culture media.
Assessing bacteriolytic activity across different species and conditions.

Main Results:

Bacteriolytic enzyme production was observed in species belonging to the genera Serratia, Proteus, Morganella, and Providencia.

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Peptone-based media with killed Gram-negative cells yielded the highest detection rates.

Escherichia coli, Shigella, Salmonella, Klebsiella, Enterobacter, and Citrobacter species showed no detectable bacteriolytic activity under tested conditions.

Conclusions:

Specific Enterobacteriaceae genera possess bacteriolytic capabilities.
The use of specific media formulations enhances the detection of these enzymes.
Not all members of the Enterobacteriaceae family produce detectable bacteriolytic enzymes.