If you visit Africa, do not shake their hands. Just bow or something.
... I guess that depends on where you go and who you meet. In BF and Ghana (neighbor to the south), I shook hands with people- but I was meeting Christians.
BF is now a Muslim-dominated country, btw. For Muslims, the mores are different.
One other related cultural note - true in both countries: Do not give or receive anything with the left hand. Very offensive.