VetBact - 'Easy' G Quiz

Question

Species/subspecies	G+	G-
Which of the following bacteria is/are Gram positive (G+) and which ones are Gram negative (G-)?
Proteus vulgaris:
Chlamydia psittaci:
Burkholderia mallei:
Brucella melitensis:
Dichelobacter nodosus:
Corynebacterium diphtheriae diphtheriae: