Microbiological assay of patulin, using Bacillus megaterium

Area of Science:

• Mycology
• Microbiology
• Food Science

Background:

• Patulin is a mycotoxin produced by certain fungi, commonly found in fruits like apples.
• Accurate detection of patulin is crucial for food safety and quality control.

Purpose of the Study:

• To develop and optimize a quantitative bioassay for patulin using Bacillus megaterium NRRL 1368.
• To compare the bioassay's performance against existing chemical methods.

Main Methods:

• Utilizing Bacillus megaterium NRRL 1368 as a test organism sensitive to patulin.
• Determining optimal conditions for the bioassay and establishing linearity between 2 and 80 µg of patulin.
• Comparing the bioassay with thin-layer chromatography and spectrophotometric methods.

Main Results:

• The bioassay demonstrated sensitivity down to 1.7 µg of patulin.
• The response of Bacillus megaterium to patulin was linear within a specific concentration range.
• The bioassay showed comparable accuracy to chemical methods but was less sensitive.

Conclusions:

• Bacillus megaterium NRRL 1368 is a suitable organism for a rapid, simple, and cost-effective patulin bioassay.
• The developed bioassay can accurately quantify patulin in liquid media, apple juice, and corn samples.
• This method offers a viable alternative for verifying toxicity and measuring patulin levels in food products.