VetBact - 'Easy' Gram Staining 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:
Helicobacter pylori:
Corynebacterium diphtheriae diphtheriae:
Clostridium perfringens:
Salmonella spp.:
List correct answers