Tag: Gram stain

While a major taxonomic review in 2020 reclassified much of the genus, the core characteristics of these lactic acid producers remain consistent: are Lactobacillus Gram-positive bacteria? Yes, the overwhelming majority are, a feature central to their classification and vital role in fermented foods and human health.

The human gut microbiota is home to over 100 trillion microorganisms, including both beneficial and potentially harmful bacteria. While the majority of bacteria in the human gut belong to the Firmicutes and Bacteroidetes phyla, probiotics can be either Gram-positive or Gram-negative. Understanding this fundamental microbial characteristic is key to understanding their diverse functions and health benefits.