Not only hookworm but viruses can penetrate through the feet, not mentioning "mossy-foot" and various fungi infections. Some larvae that enter through the skin from the soil can grow worms as long as 1-2 meters, at least in Africa. Walking barefoot on coral and volcanic soils can lead to Kaposi malignacies and odd viral infections. Celulitus (elephantisis) can be caused by staph entering lower limb scar tissue -- I know, I got it that way. As well as cholera, malaria, six kinds of salmonellas/paratyphoids in Asia and the Caribbean/South America.
Point is: don't go barefoot in the tropics! Cook all meats well-done, and do the things in my previous post. If you have a rain-catch with a cistern that you filter and once in a while treat with a bit of chlorine, you can make ice, coffee, brush your teeth, etc. Public sources of water, usually not. It isn't Kansas anymore. It's a whole lot better.
Thanks for the info regarding Fel 6. Ok, point well taken, no bare feet! :disappoin So does that mean you also do not recommend flip flops and such?