Methylobacterium mesophilicum
（重定向自Pseudomonas mesophilica）
Methylobacterium mesophilicum is a Gram-negative, soil-dwelling bacterium, reported to be an opportunistic pathogen in immunocomprimised patients.
Methylobacteria are typically slow-growing and produce pink-pigmented colonies. Pink pigmentation is the primary diagnostic characteristic used in the initial isolation of Methylobacteria. With extended incubation, pink colonies often take on a coral hue. M. mesophilicum and M. zatmanii are the two most commonly reported species isolated in clinical samples.