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Table 2 Breakpoint titre threshold for positive WFT

From: Diagnostic tools used in the evaluation of acute febrile illness in South India: a scoping review

StudyPositive thresholdThreshold for convalescent sera
Kumar et al., 2012 [50]≥ 1:80
Mathai et al., 2003 [52]≥ 1:80
Razak et al., 2010 [63]≥ 1:1604-fold rise starting from 1:40
Stephen et al., 2015 [65]≥ 1:3204-fold rise starting from 1:40
Subbalaxmi et al., 2014 [66]≥ 1:80
Viswanathan et al., 2013 [70]≥ 1:20
Vivekanandan et al., 2010 [71]≥ 1:80
Katoch et al., 2016 [74]≥ 1:3204-fold increase in paired sera
Manickam et al., 2014 [83]≥ 1:160
Prasannan et al., 2017 [75]≥ 1:320