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-)?
Trueperella pyogenes:
Chlamydia psittaci:
Brucella suis:
Escherichia coli:
Vibrio cholerae:
List correct answers