A radioresistant Gram-positive asporogenous rod isolated from the faeces of a giant panda (Ailuropoda melanoleuca).

A highly radioresistant bacterium was isolated from the faeces of a giant panda (Ailuropoda melanoleuca). When the organism was subjected to gamma irradiation in phosphate buffer, the induction dose and D10 values were 846 and 345 krad, respectively, for cells grown on PCNZ agar, and 700 and 460 krad, respectively, for the enlarged cells grown on 5% (v/v) horse blood brain heart infusion agar. The D10 value of the former cells was about 1.8 times higher than that of Micrococcus radiodurans grown on PCNZ agar.