Rabbit Anti-L. monocytogenes type 1, 2 Polyclonal antibody for Agg. Listeria monocytogenes?is a Gram-positive short-form bacillus with flagella, which does not form endospores. Taxonomically, eight bacterial strains belong to?Listeria. Among these bacterial strains, one bacterial strainL.monocytogenes?is considered pathog