stool sample or rectal swab arrives in lab
label one H E plate , one MAC plate ,and one tube sf
inoculate sample to h e ,mac, and sf
incubate plates and broth at 36 (+/-1)c for 18-24 hours
examine plates and recrd results
are Salmonella -like or Shigella -like or colonies presents ?
mac ;Salmonella -like and Shigella -like colonies are clear / colourless
h e ; Salmonella -like colonies clear with black centres. Shigella -like clear - pale green
no additional testing performed on plates