肺部感染是目前我国住院治疗的主要病种,占市级医院住院病种的12.6%、县级的23.5%,其最常见的病原体为细菌,其中重症肺部感染死亡率高,因此越来越受到重视。人体免疫机能的下降可能是导致细菌感染多发的重要原因之一。天然免疫是人体免疫应答的第一道防线,具有识别并清除入侵病 Pulmonary infection is currently the main disease hospitalized in China, accounting for 12.6% of municipal hospital inpatient disease, county-level 23.5%, the most common pathogens are bacteria, of which the mortality rate of severe pulmonary infection is high, so more and more The more attention. Decline in human immune function may be one of the important reasons leading to bacterial infection. Natural immunity is the first line of defense of the human immune response, with the identification and removal of invasive disease