Colonial Growth and Gram Stain Morphology Comparison

Growth on Chocolate agar comparison

Francisella Tularensis 

48 hours incubation

Pasteurella multocida

24 hours incubation:
appearance similar to Haemophilus influenzae

Gram Stain comparison

F. tularensis

very small, gram-negative coccobacillus/coccus; individual organisms are difficult to see.

P. multocida

small gram-negative coccobacillus with well-defined individual organisms