Transmission electron microscopy of the A. caviae strains Sch3N (wild type) (A), AAR269 (flaA) (B), AAR27 (flaB) (C), AAR31 (flaA flaB) (D), AAR150 (flaG) (E), AAR59 (flaH) (F), and AAR8 (flaJ) (G) grown at 37°C in BHIB. Bacteria were gently placed onto Formvar-coated copper grids and negatively stained using 2% potassium phosphotungstate. Bar, 0.6 μm.