摘要As the hub of cellular lipid metabolism,lipid droplets(LDs)have been linked to a variety of biological processes.During pathogen infection,the biogenesis,composition,and functions of LDs are tightly regulated.The accumulation of LDs has been described as a hallmark of pathogen infection and is thought to be driven by pathogens for their own benefit.Recent studies have revealed that LDs and their subsequent lipid mediators contribute to effective immunological responses to pathogen infection by promoting host stress tolerance and reducing toxicity.In this comprehensive review,we delve into the intricate roles of LDs in governing the replication and assembly of a wide spectrum of pathogens within host cells.We also discuss the regulatory function of LDs in host immunity and highlight the potential for targeting LDs for the diagnosis and treatment of infectious diseases.