PMC6507261_01
Violet-pigmented colonies on blood agar and MacConkey agar plates, typical of C. violaceum.
CRIID2019-6219295.001.jpg
PMC6507261_01_CRIID2019-6219295.001.jpg
fig1
HME filter. However, small colonies with dark violet metallic pigmentation were observed on both blood agar and MacConkey agar plates (Figure 1) from the swab of the patient end of the HME filter.