Pseudomonas can be treated with bathing with cider vinegar /water 50:50. Has been used in hospitals till drug companies brought in pricey drugs, and Nhs guidelines insisted on treatment protocols.
Only snag is that care must be taken with broken skin, where the acidi the vinegar could sting.
The Jack and Jill verse is centuries old,vinegar and brown paper.
When I picked grapes in France,long ago, the old men told us to rub grape juice on our cuts from the knife, and we never got infections.