PMC8457974_01
Macroscopic and microscopic appearance of Rothia mucilaginosa. (a) Gram staining of characteristic blue cocci from a cerebrospinal fluid culture at 37 C for 24 h. (b) A blood agar plate showing R. mucilaginosa colonies in a cerebrospinal fluid sample from the patient, cultured over 24 h at 37 C in CO2. (c) Sticky and slimy colonies and a positive string test result.
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fig1
Microbiological Gram staining of CSF revealed only typical Gram-positive cluster forming cocci (Figure 1(a)). We observed that Gram-positive colonies were sticky in nature, whitish/gray, nonhemolytic, smooth, and round after 24 h of incubation at 37 C in CO2 in sheep blood agar (Figures 1(b) and 1(c)).