Josko is right. trash the carpet and repaint.
"old people smell" in a house is usually a combo of incontinence of urine and faeces that 'somehow' gets into the carpet and flooring underneath (concrete wood whatever)......
here's why the smell is strong- many old people don't drink enough water, cos that makes them want to pee more. so they have highly concentrated urine with lots of urea in it. many old people also have weak immune systems so they have chronic urinary tract infections. the bacteria causing the UTI break down the urea in the urinary tract and bladder to create lots of ammonia. when this hits the carpet/concrete/wood, it smells crook straight away. If you add a daily dose of urea, bacteria and ammonia to the flooring every day for a few months or years (via new pee), you eventually get a nice bacterial population in the carpet.
even if an oldie doesn't have a UTI, a carpet laced with urine will be colonized by bacteria and they will convert the urea into ammonia...
it is the comination of ammonia and bacterial metablic waste that perpetuates the smell.
best way to get rid of it is to throw carpet out and saturate the flooring underneath with an industrial strength shot of a protein denaturer like a combo of sodium hydroxide and sodium hypochlorite (industrial strength bleach). Must be concentrated and allowed to sit in concrete for 12 hours and wood for 20-30 mins.....then wash off.....wait a day or two and see if the smell persists...if it does reapply.
can also wash the walls down with a diluted bleach. drunks and old people can and do pee anywhere.......
edit:
it is a common topic of conversation in hospitals and nursing homes.
there's also another smell health carers refer to - "the smell of death" this is different to ammonia and is caused by multisystem organ failure......renal shutdown, failing liver, heart, lungs, blood buffer system, adventitious bacteria.....usually someone dies within 3 days of developing this smell.
"old people smell" in a house is usually a combo of incontinence of urine and faeces that 'somehow' gets into the carpet and flooring underneath (concrete wood whatever)......
here's why the smell is strong- many old people don't drink enough water, cos that makes them want to pee more. so they have highly concentrated urine with lots of urea in it. many old people also have weak immune systems so they have chronic urinary tract infections. the bacteria causing the UTI break down the urea in the urinary tract and bladder to create lots of ammonia. when this hits the carpet/concrete/wood, it smells crook straight away. If you add a daily dose of urea, bacteria and ammonia to the flooring every day for a few months or years (via new pee), you eventually get a nice bacterial population in the carpet.
even if an oldie doesn't have a UTI, a carpet laced with urine will be colonized by bacteria and they will convert the urea into ammonia...
it is the comination of ammonia and bacterial metablic waste that perpetuates the smell.
best way to get rid of it is to throw carpet out and saturate the flooring underneath with an industrial strength shot of a protein denaturer like a combo of sodium hydroxide and sodium hypochlorite (industrial strength bleach). Must be concentrated and allowed to sit in concrete for 12 hours and wood for 20-30 mins.....then wash off.....wait a day or two and see if the smell persists...if it does reapply.
can also wash the walls down with a diluted bleach. drunks and old people can and do pee anywhere.......
edit:
it is a common topic of conversation in hospitals and nursing homes.
there's also another smell health carers refer to - "the smell of death" this is different to ammonia and is caused by multisystem organ failure......renal shutdown, failing liver, heart, lungs, blood buffer system, adventitious bacteria.....usually someone dies within 3 days of developing this smell.