Disease
Listeria monocytogenes and Listeria species are gram-positive, rod-shaped, facultatively anaerobic, and non spore-forming. The major human pathogen in the Listeria genus is L. monocytogenes. It is usually the causative agent of the relatively rare bacterial disease listeriotic, listeriosis a serious infection caused by eating food contaminated with the bacteria. The disease affects pregnant women, newborns, adults with weakened immune systems, and the elderly. Antibodies and ELISA test kits for detection of listeria antigens.