Fig. 1. Colony morphology and acid-fast staining of Segniliparus rugosus. (A) Colonies on Ogawa medium. Rough, dry, buff-to-orange colonies. (B) Acid-fast bacillus stain (colony smear). Strongly acid-fast short rods were observed, unlike Nocardia spp., which are typically weakly/ partially acid-fast and show branching filaments.

Ann Clin Microbiol 2025;29(1):2. Pulmonary infection caused by Segniliparus rugosus in a patient without systemic immunodeficiency but with bronchiectasis: first identification by matrix-assisted laser desorption ionization time-of-flight mass spectrometry with whole-genome confirmation

Fig. 1. Colony morphology and acid-fast staining of Segniliparus rugosus. (A) Colonies on Ogawa medium. Rough, dry, buff-to-orange colonies. (B) Acid-fast bacillus stain (colony smear). Strongly acid-fast short rods were observed, unlike Nocardia spp., which are typically weakly/ partially acid-fast and show branching filaments.