I find it funny how ignorant people are. All of you have some sort of worms in you. And when you come in contact with others in a confined space you will have a very good change of getting them. Just lock a whole lot of people up in a subway train, with one person who has pin head worms, the eggs can stick to the infected persons clothes and those egg can come loose and start floating around and be breathed in by you.
The pork worms are a problem, because as stated infect the brain and cause seizures. There has been outbreaks in the states too, so isnt just confined to countries like arg, but you are more likely to come into contact with the worms in countries where they dont have as good a food/restaurant/shop inspections. There was an outbreak a few years ago in new york where alot of jews got infected - these were well off people. It turned out that it had come from a central american maid who worked for one family.
The reason that people become infected was because they dont cook their meat properly - high enough temp for long enough period, and because people dont wash their hands after going to the loo or before handling food.
I have even had friends whos dog was rubbing it bum on the carpet, and they had no idea it was because their dog had worms. And they let their kids play on that same carpet.
As for lice, they prefer clean hair, so dont blame poor dirty people.
Anyways people have become so removed from where their food comes from, or how it is produced, processed, that they dont know about this sort of thing anymore. How many of you guys take de-worming pills yearly ?