Hazel,
It is sad that we "need" these emergencies to convince us that our loved ones are in the right place, we shouldn't need that.
I do hope he gets treatment and recovers.
Elaine mentioned the Cranberry juice, it might be an old wives tale but I take my mum some every week - and she actually drinks it! She hasn't had a UTI for about 4 years now, and is prone to them. Also, he must be encouraged to drink plenty of water, but we all know that people think that means half a glass a day, when it actually means two litres. But the cranberry is a fail-safe, I'm surprised care homes don't give everyone a couple of glasses a day.
Hope things improve.
Much love
Margaret