methylobacterium fujisawaense methylobacterium fujisawaense methylobacterium fujisawaense is a facultatively anaerobic, gram-negative, rod-shaped bacteria. it is catalase-positive and oxidase-negative. it produces pink-pigment on microbiological agar media (tsa and r2a, etc.). this bacteria is facultatively methylotrophic and is widely distributed in nature. they can be isolated from soil and on occasion freshwater environments, including drinking water. methylobacterium fujisawaense gram stain of methylobacterium fujisawaense appear as negative rods under bright-field microscopy ×1000. scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: hyphomicrobiales family: methylobacteriaceae genus: methylobacterium species: m. fujisawaense binomial name methylobacterium fujisawaensegreen et al., 1988 methylobacterium fujisawaense pink-pigmented bacterial colonies growing on r2a after 5 days of incubation at 30° celsius (front view). methylobacterium fujisawaense pink-pigmented bacterial colonies growing on r2a after 5 days of incubation at 30° celsius (reverse view). commonly, m. fujisawaense bacteria is not established as pathogenic; however, rarely it may cause human infection/disease, mostly in immunocompromised patients.