There was a guy that I knew who worked on the roads (Victoria)...

There was a guy that I knew who worked on the roads (Victoria) who died from a single bull ant sting

The doctors theory was that during his working lifetime he had been bitten so often with bull ants that the poison built up in his system to the point where one more bite was too much

Some sort of toxin build up so maybe a toxin cleansing program may help.

There is a theory that a high salt diet is good for animals to counteract against being bitten by ticks

I was bittern by one of those white tailed spiders a few years ago which played havoc with me, and had all the doctors saying that it was interesting case but since that time I am a target for every biting thing possible and it seems that my immune system has gone haywire as a result of the bite