Intestinal worms and parasites are a common affliction for the human population throughout Mexico, and the drug industry does a roaring trade flogging various treatments that we all take every six months to flush the baddies through the system. Well, I say 'we'. Should have said 'they'. Because I wasn't let on to this secret until a couple of days ago.

I've been here well over a year now, so I dread to think just how many generations of the little wrigglers have made themselves at home in my belly. But the big Vermox 500 gram one dose tablet I just swallowed should put an early end to their fun, assuming they are there at all - I haven't felt ill or had the tell tale embarrassing itch (you can guess where) which would normally suggest a Worm City in the guts....