VetBact - G Quiz

Question

Species/subspecies	G+	G-
Which of the following bacteria is/are Gram positive (G+) and which ones are Gram negative (G-)?
Streptobacillus moniliformis:
Ehrlichia canis:
Glaesserella parasuis:
Serratia marcescens marcescens:
Clostridium tyrobutyricum: