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. 2022 Jul 20;16(7):e0010044. doi: 10.1371/journal.pntd.0010044

Fig 3. OD values of the TropBio ELISA of plasma samples from individuals 14 to 65 years of age are shown.

Fig 3

The TropBio ELISA is measuring the circulating filarial antigen of the adult filarial worm. Values above OD 0.35 are considered as positive, with low positive results between OD 0.35 and 0.8, intermediate positive results between OD 0.8 and 1.0, and high positive results above the OD of 1.0. Most filarial infected individuals in 2009 showed high positive results, reflecting a high adult worm burden. In 2019 infected individuals had low positive ODs indicating a low number of adult worms.