Review Question - QID 212886

A 52-year-old man is brought to the emergency department after being found down on the sidewalk. On presentation, he is found to have overdosed on opioids so he is given naloxone and quickly recovers. Physical exam also reveals lumps on his neck and face that are covered by small yellow granules. These lumps are slowly draining yellow pus-like fluid. He says that these lumps have been present for several months, but he has ignored them because he has not had any fever or pain from the lumps. He does not recall the last time he visited a primary care physician or a dentist. Oral exam reveals multiple cavities and abscesses. The most likely cause of this patient's facial lumps has which of the following characteristics?