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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

Study

Positive threshold

Threshold for convalescent sera

Kumar et al., 2012 [50]

≥ 1:80

–

Mathai et al., 2003 [52]

≥ 1:80

–

Razak et al., 2010 [63]

≥ 1:160

4-fold rise starting from 1:40

Stephen et al., 2015 [65]

≥ 1:320

4-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]

≥ 1:320

4-fold increase in paired sera

Manickam et al., 2014 [83]

≥ 1:160

–

Prasannan et al., 2017 [75]

≥ 1:320

–