Burping comes a lot together with blastocystis. I've read a lot about blastocystis patients and there are a lot of burping symptoms with them.
A blown air belly and farting is also a typically blastocystis symptom. Apparently it'll consume the food (especially carbohydrate and sugars) and a waste product is gas, at least I think this is the cause.
Burping would be worse after eating, especially with the above mentioned ingredients.