What to eat and what not to eat when having acute bronchitis?

Bronchitis diet. Lots of fluids is important. Avoiding foods that cause allergies (if you have any). Some folks find avoidance of fried foods (causes more inflammation); high fat dairy products (exacerbates mucus production); refined sugar; & salty foods (thicker mucus and inflammation) are beneficial.
Nothing Special. A good healthy diet is all that should be considered. Extra fluids may help.