Not sure I would use cow manure on a burn, but I can understand how it might work. One of the courses I taught was Immunology. The skin is occupied by 'good' bacteria that works with our immune system to fight 'bad' bacteria. A burn would temporarily wipe out the resident bacteria and give foreign bacteria a chance to take hold. Cow manure bacteria has less harmful bacteria than soil bacteria for example, and could prevent 'bad' bacteria' from occupying that same space. However, I would recommend an antibiotic salve instead.
Not sure I would use cow manure on a burn, but I can understand how it might work. One of the courses I taught was Immunology. The skin is occupied by 'good' bacteria that works with our immune system to fight 'bad' bacteria. A burn would temporarily wipe out the resident bacteria and give foreign bacteria a chance to take hold. Cow manure bacteria has less harmful bacteria than soil bacteria for example, and could prevent 'bad' bacteria' from occupying that same space. However, I would recommend an antibiotic salve instead.