Hi - Welcome to the community! This is a great question. There is something called post-infectious IBS. We have a lot of great information about this here: https://irritablebowelsyndrome.net/living/could-food-poisoning-be-the-cause-of-your-ibs/, https://irritablebowelsyndrome.net/living/the-giardia-connection/, and https://irritablebowelsyndrome.net/living/discouraging-journey-diagnosed/. If you haven't done so already, speaking with your doctor would be a great option to try and narrow down whether or not your symptoms are due to infection. Hope this helps! - Chris, IrritableBowelSyndrome.net Team