Bacterial infections are caused by a variety of microorganisms, including viruses, fungi, and bacteria. The crossword solutions for the term BACTERIAL include ANTI (4 letters), SULFA (5 letters), ANTHRAX (7 letters), STAPH (5 letters), and TYPHUS (6 letters). ANTI is an abbreviation for antibiotics, which are medications used to treat bacterial infections. SULFA is an abbreviation for sulfa drugs, which are a type of antibiotic used to treat bacterial infections. ANTHRAX is a serious bacterial infection caused by the bacterium Bacillus anthracis. STAPH is an abbreviation for Staphylococcus, a type of bacteria that can cause skin infections. TYPHUS is a bacterial infection caused by the Rickettsia bacteria.