BCG bacilli are rapidly detected and persist in ADLNs after intradermal vaccination in the ear. BCG (10⁶ CFUs) was inoculated into the dermis of each ear dorsum. From 4 hours to 14 days after injection, each ear (•) and ADLNs (○) were harvested and BCG multiplication was estimated by counting CFUs after plating on selective medium; data are the mean CFUs ± SD from 5 animals, that is, 10 ears and ADLNs processed individually.