Arrowheads display polymorphonuclear infiltrate filling up a lot of the alveoli (saline), regions of scarce inflammatory mononuclear infiltrate (IN-immunized mice) and regions of inflammatory infiltrate from the polymorphonuclear type leukocyte with intrabronchial area (IN+IM-immunized mice), respectively.(C, D)The columns display pictures with 25 (remaining), 100 (middle remaining), 200 MRS 2578 (middle correct) and 400 (correct) magnifications. […]