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一种好气的,革兰氏阳性,不固酸杆菌,单生或成对,0.3-0.5×0.6-3.0微米,无荚膜,具1-3根侧生或端生鞭毛,能游动。从葡萄糖、麦芽糖、乳糖、蔗糖、半乳糖、果糖和甘油产酸不产气。明胶液化缓慢。淀粉水解微弱或不水解。不脂解。硝酸盐不产生亚硝酸。不产生3-羟基丁酮和吲哚。接触酶阳性。根据Ramamurthi适温24-27℃,最高温度40℃、最低温度3℃。在含有氯化铵,葡葡糖,和盐类的规定培养基内,需要有氨基酸,生物素,泛酸盐,和硫胺素。色素形成因培养基成份而
An aerobic, Gram-positive, acid-fast bacillus, solitary or in pairs, 0.3-0.5x0.6-3.0 microns, uncapped, with 1-3 lateral or terminal flagella capable of swimming. No gas is produced from glucose, maltose, lactose, sucrose, galactose, fructose and glycerol. Gelatin liquefaction slow. Starch hydrolysis is weak or not hydrolyzed. Not lipolytic. Nitrate does not produce nitrous acid. No production of 3-hydroxybutanone and indole. Contact enzyme positive. According to Ramamurthi suitable temperature 24-27 ℃, the maximum temperature of 40 ℃, the minimum temperature of 3 ℃. Amino acids, biotin, pantothenate, and thiamine are required in defined media containing ammonium chloride, glucose, and salts. Pigment formation due to the composition of the medium