Antibiotics before chemotherapy?

Hi A.ndrea welcome to the forum I don't know enough about the situation that you find yourselves in but I imagine that any infection will need treated with the Antibiotics and I doubt very much that chemo would be given when someone has an infection. I cant think that anti biotics would do anything else but help with the infection so not sure where the survival rate part is coming from. 

All that said I think the best thing to do is to give the chemo unit where your Father in law will be having chemo a call and take their advice re this but you need to call in the am as any infection will get progressively worse and make our father in law ill.