Fermentation Problem in Spanish North-Coast Honey.

Area of Science:

• Food Science
• Microbiology
• Food Safety

Background:

• Honey's low water content typically inhibits microbial growth.
• Increased water activity is a critical factor for microbial proliferation in honey.
• Granulation status influences honey's water activity and fermentation potential.

Purpose of the Study:

• To assess the microbiological quality of Cantabrian coast honey.
• To determine the fermentation tendency of honey samples based on water content and activity.
• To evaluate the safety and quality of honey concerning regulatory standards.

Main Methods:

• Analysis of 21 honey samples from the Cantabrian coast.
• Determination of water content and water activity.
• Microbiological testing for Enterobacteriaceae, coliforms, Escherichia coli, Salmonella, and Shigella.
• Quantification of mold and yeast counts.

Main Results:

• Only two samples had water content below 17.1%, indicating no fermentation risk.
• Most samples exhibited high water activity, suggesting potential for microbial growth.
• Four samples exceeded the Spanish legal moisture limit, posing a high fermentation risk.
• Absence of specific indicator bacteria (Enterobacteriaceae, coliforms, E. coli, Salmonella, Shigella) suggested good handling practices.
• A correlation between water activity and mold/yeast counts allowed classification into high and low fermentation risk groups.

Conclusions:

• High water content is the primary driver of fermentation risk in the studied honey samples.
• Honey samples were successfully categorized into high and low fermentation risk groups based on water activity.
• Storage observations corroborated the fermentation risk classification, highlighting the importance of water content monitoring.