Antibiotics for bact: Antibiotics, also called antibacterials, what antibiotics are used for diverticulitis are a genus of antimicrobial hallucinogenic cast-off in the treatment and inhibiting of bacterial infections. They may either quarry or stop the progress of bacteria. A narrow billion of antibiotics also guide antiprotozoal activity. Antibiotics are not proficient against viruses such as the garden lukewarm or influenza, and their unfit kill allows the surfacing of resistant organisms. In 1928, Alexander Fleming identified penicillin, the original chemical worsen with antibiotic properties. Fleming was working on a culture of disease-causing bacteria when he noticed the spores of a teensy-weensy unskilled mold (Penicillium chrysogenum), in joined of his education plates. He observed that the certitude of the mold killed or prevented the broadening of the bacteria.