If a child on methotrexate and remicade (infliximab) gets a abcescss/mrsa do they need to be admitted or in some cases will oral antibiotics work?

Depends. : Depends on the examining doctor who is taking care of his medications. As u may have been explained Remicade ( infliximab) may allow infections to become life threatening. If IV antibiotics are contemplated they can be administered at home with an indwelling peripheral vein catheter and nurse home visits. Sometimes just drainage of abscess is all that may be required. Close follow up is key.