Microbial Variability of Commercial Equine Probiotics

Area of Science:

• Animal Science
• Microbiology
• Veterinary Medicine

Background:

• Probiotics are live microorganisms intended to provide health benefits.
• Previous research indicated discrepancies between label claims and actual content in animal probiotics.
• Inter-lot variability of equine probiotic products had not been previously assessed.

Purpose of the Study:

• To evaluate the microbial content of commercial equine probiotic products.
• To assess the inter-lot variability of these products.
• To compare product content with label claims.

Main Methods:

• An observational study evaluated eleven equine probiotic products.
• Microbial content was assessed using both culture-dependent and culture-independent (PCR) techniques.
• Content was compared against label claims, and inter-lot variability was statistically analyzed (Kruskal-Wallis test).

Main Results:

• None of the eleven evaluated equine probiotics met their stated label claims.
• Nine out of eleven products showed no statistically significant inter-lot variability.
• Several products were found to be missing microorganisms listed on their labels, confirmed by both culture and PCR methods.

Conclusions:

• Commercial equine probiotics frequently do not meet label claims for microbial content.
• The lack of microbial content and discrepancies with label claims raise concerns about product efficacy and quality control.
• Further investigation into manufacturing processes and quality assurance for equine probiotics is warranted.