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Volume 28, Number 12—December 2022
Research Letter

Laboratory Features of Trichinellosis and Eosinophilia Threshold for Testing, Nunavik, Quebec, Canada, 2009–2019

Luke B. HarrisonComments to Author , Michael D. Libman, Chelsea Caya, Momar Ndao, and Cedric P. Yansouni
Author affiliations: McGill University Health Centre, Montreal, Quebec, Canada (L.B. Harrison, M.D. Libman, C. Caya, C.P. Yansouni); National Reference Centre for Parasitology, Montreal (M. Ndao)

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Figure

Receiver operating characteristic curve comparing performance of thresholds of absolute and relative eosinophilia to trigger automatic reporting of possible trichinellosis. Sn and Sp for the thresholds of absolute eosinophilia examined were 0.5 × 109 (Sn = 1.0, Sp = 0.65), 0.8 × 109 (Sn = 1.0, Sp = 0.71), 1.0 × 109 (Sn = 0.91, Sp = 0.71), 2.0 × 109 (Sn = 0.63, Sp = 0.94) and for relative eosinophilia were 5% (Sn = 1.0, Sp = 0.65), 10% (Sn = 0.88, Sp = 0.71), 15% (Sn = 0.85, Sp = 0.76), and 30% (Sn = 0.36, Sp = 1.0). Sn, sensitivity; Sp, specificity.

Figure. Receiver operating characteristic curve comparing performance of thresholds of absolute and relative eosinophilia to trigger automatic reporting of possible trichinellosis. Sn and Sp for the thresholds of absolute eosinophilia examined were 0.5 × 109 (Sn = 1.0, Sp = 0.65), 0.8 × 109 (Sn = 1.0, Sp = 0.71), 1.0 × 109 (Sn = 0.91, Sp = 0.71), 2.0 × 109 (Sn = 0.63, Sp = 0.94) and for relative eosinophilia were 5% (Sn = 1.0, Sp = 0.65), 10% (Sn = 0.88, Sp = 0.71), 15% (Sn = 0.85, Sp = 0.76), and 30% (Sn = 0.36, Sp = 1.0). Sn, sensitivity; Sp, specificity.

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