Skip to main content

Table 1 Diagnostic classification of the study participants according to their DENV serological and PCR results

From: The prevalence of dengue virus serotypes in asymptomatic blood donors reveals the emergence of serotype 4 in Saudi Arabia

Group

Laboratory diagnostic criteria

Negative group

Negative by all serological and PCR tests

Viremic 1ry infection group

Positive PCR ± IgM positive antibodies

Convalescent-phase 1ry infection group

Either exclusively positive for IgM or dual positive IgM and IgG antibodies with an IgM/IgG ratio ≥ 1.2

Viremic 2ry infection group

Simultaneously positive PCR with positive IgG ± IgM antibodies

Convalescent-phase 2ry infection

Negative PCR and dual positive IgM and IgG antibodies with an IgM/IgG ratio < 1.2

Previous exposure group

Exclusively positive for IgG antibodies