Where do I turn for assistance with an aged brother with many medical maladies?

My aged brother(73)resides in a room in my home. He has many medical conditions eg: CHF with implanted device,severe bi-polar (to which he denounces),
recovery from a broken hip, and a broken clavicle. He has alienated himself for other siblings, his activities have become severly diminished, his diet habits are improper, he choses to urinate in plastic iced tea containers, and deficate in a comode with potty liners (which may be days before they are disposed of) his room is dirty and unkempt, and he doesn't come up to shower, bathe , brush teeth, or personal any self- cleanliness whatsoever. He will wear the same garments days on end.. I can no longer allow this in my home, and I as a senior with health issues (62) am beginning to suffer the consequences of the caretaking. Please advise me as of what I can do. He primarily is of sound mind, but just in a severe state of denial.