Thanks for writing to us.
The widespread folliculitis
that you are having definitely needs systemic antibiotics and anti fungals to control them. Since you have a history of MRSA infection, there is every chance of getting infected again. It is good that the shampoo is providing some relief but that alone is not sufficient . You need to get the required antibiotics prescribed from your dermatologist
I hope this information has been both informative and helpful for you.
Dr. Rakhi Tayal