Gram negative differentiation

Question 1

Oxidase positive and comma shaped

Answer 1

Grow in 42: campy

grows in alkaline: vibrio cholerae

Question 2

Diplococci

Answer 2

Neisseria species

Maltose fermenter: N meningitidis
Maltose non fermenter: N gonorrhea

MeninGonocci ferment Maltose and Glucose
Gonococci ferment Glucose

Question 3

Coccoid rods

Answer 3

H influenza: require V and X

Pasteulla: animal bites

Brucella: brucellosis

Bordetella pertusis

Question 4

Rods

Answer 4

Lactose fermenter vs nonfermenter

Fermenters:
Fast fermenter: Klebsiella, E coli, enterobacter
Slow fermenter: citrobacter, serratia, others

Nonfermenters further divided by oxidase
Oxidase negative: shigella, salmonela, proteus
Oxidase positve: pseudomonas, H pylori.