Fig. 1: The interactions among sensitive pathogens, resistant pathogens and probiotics.
From: The effect of stochastic noise on antibiotic resistance in intestinal flora

All bacteria exhibit logistic growth. Probiotics and pathogens mutually inhibit each other. The figure is adapted from33. ηi (i = 1, 2, 3) represents the effect of antibiotics on the bacteria. η2 > η1, indicating that antibiotics are more effective against sensitive pathogens.