CHIT1 and infectious meningitis: Meningitis is a disease that is associated with a risk of developing severe neurological sequelae in survivors, and some studies have shown that the levels of certain proteins remained high in the CSF from non-survivors (Goonetilleke et al., 2010), such as chitotriosidase, complement C1q tumor necrosis factor-related protein 9, and haptoglobin.