Fig. 2
Neutralizing antibody titer reacts to single or multiple DENV serotypes in 34 pair serum samples obtained from 34 individuals who were DENV IgG positive before the dengue season and demonstrated elevated DENV IgG after the season versus patient group. Neutralizing activity was determined by PRNT50 on BHK cells. Positive PRNT samples were defined as having a neutralizing titer ≥10 or Log2(PRNT50) ≥3.32 to any of the virus test (above dotted line). Non patient 1 = pre-dengue season group; Non patient 2 = post-dengue season group; Patient = confirmed DENV infected patient group. P-value was determined by t-test. P value ≤0.05 = significant. Comparison was performed between pre-dengue season group (Non patient 1) vs. patient group. The results were represented as means of Log2(N.A titers) ± standard deviation (Mean ± SD)