What kind or which type of antibiotics should be prohibited to be be taken by someone suffering from crohn's disease?

No "prohibited" list: Your question is excellent but a tough one to answer, since it depends on the patient (allergies, other diseases one may have) , the diagnosis (diarrhea, perforation), and the type of microbes that is suspected to cause the infection. In addition, the choice of abx is also affected by the drug that is being used to treat Crohn's. In complex cases, an infectious diseases specialist is consulted.