At the doctor’s office, the doctor drains the abscess and takes a sample for culturing. she also prescribes some broad-spectrum antibiotics to treat the obvious infection. a couple days later, the doctor tells sam that his wound contained a number of bacteria including pasteurella multocida. when the dog bit sam’s arm p. multocida entered the wound and started to establish an infection. in order to do so, the bacteria have to grow, which requires energy. one of the most common energy sources used by bacteria is glucose. why is glucose such a good source of energy for bacteria?