IL33 and infectious disease: In this study, neutrophil infiltration and the expression levels of TREM-1, IL-33, and ST2 increased in the eyes of both B6 and BALB/c mice, and the IL-1β level was increased in B6 mice after ocular T. gondii infection, TREM-1 plays a role in regulating neutrophil chemotaxis in acute infectious diseases and is a potential biomarker for the diagnosis of infectious diseases (Cao et al., 2017).