Corynebacterium sp. "diptheroids": Small Pinpoint Medium Large( Small, Pinpoint, Medium, Large ), pleomorphic, beaded, palisading "Chinese Letters" -> Dry Wet Creamy Sticky( Dry, Wet, Creamy, Sticky ), white gray off-white green/brown( white, gray, off-white, green/brown ) colonies -> Catalase positive negative( positive, negative )

Listeria monocytogenes: small medium large pinpoint( small, medium, large, pinpoint ) coccobacillary -> narrow wide( narrow, wide )-zone, beta alpha gamma( beta, alpha, gamma ) hemolytic colonies -> catalase positive negative( positive, negative ) -> umbrella & tumbling, Motility at 25C, Litmus milk-chalky, white, indicator red yellow( red, yellow ). Salicin +, Dextrose +, Trehalose +, Bile esculin +

Erysipelothrix: thin, small medium large pinpoint( small, medium, large, pinpoint ), pointed rod -> small, alpha beta gamma( alpha, beta, gamma ) hemolytic -> catalase negative positive( negative, positive ) -> TSI=H25

Lactobacillus sp: long short( long, short ), thin GPR in chains -> small, alpha beta( alpha, beta ) hemolytic -> catalase negative positive( negative, positive )

Listeria is manifested primarily as septicemia pnuemonia impetigo( septicemia, pnuemonia, impetigo ) and meningitis endocarditis inflammation of hands and fingers( meningitis, endocarditis, inflammation of hands and fingers ) in neonates and immuno-compromised patients