Objective—To evaluate contents of commercial probiotic
products marketed for veterinary or human
Design—Microbiologic culture assay.
Sample Population—8 veterinary probiotics and 5
Procedure—Quantitative bacteriologic culture was
performed on all products, and isolates were identified
via biochemical characteristics. Comparison of
actual contents versus label claims was performed.
Results—Label descriptions of organisms and concentrations
accurately described the actual contents
of only 2 of 13 products. Five veterinary products did
not specifically list their contents. Most products contained
low concentrations of viable organisms. Five
products did not contain 1 or more of the stated
organisms, and 3 products contained additional
species. Some products contained organisms with no
reported probiotic effects; some of these organisms
could be pathogens.
Conclusions and Clinical Relevance—Most commercial
veterinary probiotic preparations are not accurately
represented by label claims. Quality control
appears to be poor for commercial veterinary probiotics.
(J Am Vet Med Assoc 2002;220:794–797)