The transport time, the Cary-Blair conveyance medium used and the enrichment culture had no obvious effect on the rate (P>0.05). The detection rate could be obviously raised, when repeated isolation was made.

• 样品运送时间、Cary-Blair运送培养基以及增菌培养等对检出率影响不显著(P>0.；05)；但同一样品的重复分离培养；明显提高了该菌的检出率。