Skip to content
PetriKey

Identification flow

Enteric Gram-negative Rods

Lactose, motility, H2S, and urease study branches

  1. Enterobacterales clue set

    Use lactose fermentation, motility, urease, and H2S as coursework branches. This is a study concept map, not an organism-ID protocol.

    Reference MacConkey agar concept · Escherichia coli · Klebsiella pneumoniae

    1. Lactose fermenters

      E. coli and Klebsiella are common lactose-fermenting anchors; capsule vocabulary pushes the Klebsiella contrast.

      Reference Escherichia coli · Klebsiella pneumoniae · Capsule

    2. Non-lactose fermenters

      Salmonella, Shigella, and Proteus show up in comparison drills using motility, H2S, and urease vocabulary.

      Reference Salmonella enterica · Shigella species · Proteus mirabilis