The Microbiota of Homemade Tepache Includes Antibiotic-Resistant Microorganisms.

Tepache is a traditional, homemade Mexican drink made by fermenting pineapple rinds. The natural probiotic bacteria in tepache are said to promote a healthy gut microbiome. This study assessed the microbial community in homemade tepache for diversity, survival in simulated gastric fluid, and antibiotic resistance. Simulated gastric passaging reduced total community numbers but the community density was not strongly impacted by exposure to tetracycline. Metagenomic analysis reveals a community dominated by Bacillus, Meyerozyma and Talaromyces. These results indicate that consuming home fermented beverages may provide helpful probiotic bacteria but could also expose the gut microbiome to antibiotic resistance genes.