就如同深蓝色细菌菌落暗示存在肺吸入性或血液播散性炎症一样，更局限化的脓肿灶包含嗜中性细胞。经口-咽吸入物质包括细菌。血液播散性肺炎可由败血症或感染性心内膜炎引起。
This more focal abscess containing a neutrophilic exudate as well as dark blue bacterial colonies suggests aspiration or hematogenous spread of infection to the lung. Aspirated material from the oral-pharyngeal region contains bacterial flora. Hematogenous spread of infection to lungs could occur from septicemia or from infective endocarditis involving the right side of the heart.
