Did Booth's leg develop gangrene?

[Juan Marrero]

"Fortune's Fool" has a number of interesting suggestions that were new to me. The author states that by the time of his death Booth's leg was showing signs of gangrene. That infers that, without amputation of the limb, JWB would have died, probably within a matter of days. It's interesting that, in terms of mortality, the leg break may have been as effective as a gunshot to the head.

Is anyone aware if a researcher or historian has calculated how much the leg injury slowed down Booth? Is it likely that he would have made it to Mexico if he had not been so injured? Could he have settled there indefinitely? I believe that Juarez was in power then and that he had viewed Lincoln favorably--after all Lincoln had opposed the Mexican war.