“…The AI cut-off value for low and high avidity was determined to be ≤31% and ≥32% (Narita et al, 1998). In addition, IgG avidity testing was found to be useful in the differential serodiagnosis of recent and distant infections, such as toxocariasis (Dziemian et al, 2008;Delgado et al, 2011), strongyloidiasis (Gonzaga et al, 2011), cytomegalovirus infection (Dollard et al, 2011, brucellosis (Pabuccuoglu et al, 2011) and salmonellosis (Hansen et al, 2006). In previously reported acute human strongyloidiasis, an AI cut-off value was established at 75%, active infection, with an AI for IgG <75%, while the IgG AI in chronic infection was >75% (Gonzaga et al, 2011).…”