沙门菌是导致人和动物致病的主要食源性病原菌，沙门菌毒力岛（SPI）的存在与其致病作用密切相关。近年来，有关沙门菌毒力岛的结构特征及致病机制的研究颇受重视。本文主要对沙门菌毒力岛的结构组成与功能等研究进展作一综述。

Salmonella is one of the main food-borne pathogens which can bring disease to human and animals. In recent years, the structure and pathogenesis mechanisms of Salmonella pathogenicity islands (SPIs) have been usually studied. The research progress on SPIs’ structure and function are reviewed in this paper.