Table 4.

Temporal changes in JE diagnostic confirmatory level. Percentage of symptomatic human JE cases reported in the English-language literature in blocks of five years that were confirmed by laboratory testing Level 1-4^*.

^*A total of 20,212 laboratory-confirmed JE cases were identified. Data are reported according to the year of publication. Inclusion criteria also required geographical (country) and temporal (year) data. Confirmatory levels of JE diagnosis detailed in Table 2; level 1 provides the highest level of confidence, level 3 or 4 refers to cases that were reported as IgM detected in CSF and/or serum.