Abstract: This paper studies the conventional detection of Listeria monocytogenes in aquatic product. Combines nationstandard, trade standard with method described in FDA《Bacteriological Analytical Manual》 8th edition during detection.There are seven Listeria positive in 23 kinds,255 batches of aquatic product imported from North korea. The result shows thatbecause of food processing doing severe harm to microbiology, most of them are in the agonal state, so that stimulating the injuredcell to recover is the key work in the Listeria monocytogenes pre-enrichment procedure during detection. When there are suspectcolonies in the first division, do conforming work and get the conclusion at first, instead of going on enriching, it is easy to getfalse negative result.

Key words: aquatic product, Listeria monocytogenes, detection