Figure 1. Relative abundance of the most predominant bacterial genera in the pinna of porcine ears at various time points in the absence of mites.

At week 0, Streptococcus was the most dominant genus, followed by Lactobacillus, Actinectobacter, Enhydrobacter, Aerococcus and Rothia in decreasing abundance. At week 7, Streptococcus was still the most dominant genus, followed by smaller abundance of Corynebacterium, Chryseobacterium, Rothia, Clostridium and Lactobacillus. Similarly at week 10, Streptococcus was the dominant genus, followed by Corynebacterium, Rothia, Kocouria, Clostridium and Lactobacillus. At week 21, Lactobacillus was the most dominant, followed by Streptococcus and Kocuria. Only genera, with a relative abundance of ≥10% in at least one sample are illustrated.