The reason I found out the word emetophobia exists and thus found this forum is because I was googling some travel info about avoiding getting sick while abroad in poor countries. Somebody was going to India and heard all the stories about people stomach problems and he was terrified and say he has emetophobia.
I've been to some poor countries in S. America and SE Asia. I have always been extremely paranoid about food and really didn't get to immerse myself in the cuisine out of fear. It's too bad because so much of the experience of travel is the different foods you try. But I just imagine anything that doesn't come from a restaurant with Western standards of hygiene is going to have me erupting from both ends. I know many people that swear that eating street food is no more dangerous than eating at a restaurant. And then I met a guy in Brazil who said he had nothing but rice and beans and he was down for a couple days with dehydration from vomiting so much.