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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)

Main Article

Table

Characteristics of patients and controls in study of Trichinella infections in Nunavik, Quebec, Canada, 2009–2019*

Characteristic Case-patients, n = 43 Controls, n = 31 Test statistic† p value
Demographics
Age, y 39.1 (5–75, 16.1) 45.8 (0–80, 22.4) t = –1.48 (–15.59 to 2.32) 0.144
Female 30 (69.8) 16 (51.6) χ2 = 3.77 0.052
Male
13 (30.2)
15 (48.4)


Level of care received, no. with available information/total no. (%)
Outpatient 18/27 (67) 15/24 (63) NA NA
Inpatient 9/27 (33) 9/24 (38) NA NA
Critical care 0/27 0/24 NA NA
Evacuated to southern Quebec 7/27 (26) 8/24 (33) NA NA
Unknown
16/43 (37)
7/31 (23)
NA
NA
Positive Trichinella serologic result
39 (91)§
NA
NA
NA
Biochemical features during illness
Eosinophils, × 109 cells/L 5.35 (0.80–17.40, 3.81) 0.80 (0–4.5, 1.00) t = 6.47 (3.14 to 5.95) <0.001
Platelets, × 109/L 545 (294–977, 169) 479 (208–1009, 210) t = 1.45 (–24.43 to 154.90) 0.151
Creatinine kinase, U/L 1562 (103–8081, 1511) 956 (28–6470, 1730) t = 1.42 (–245.92 to 1,458.90) 0.160
C-reactive protein, mg/L 66.5 (8–191.7, 42.1) 66.6 (0.5–253.0, 82.9) t = –0.03 (–38.05 to 36.83) 0.974
Alanine aminotransferase, U/L 140.2 (21.0–541.0, 128.1) 85.1 (16.0–334.0, 75.6) t = 1.82 (–5.56 to 115.91) 0.074

*Values are no. (%) or mean (range, SD) except as indicated. NA, not applicable; t, Student t statistic. †Expressed as t value (95% CI). ‡Optical density >0.3. §Four cases were determined epidemiologically, and initially negative serologic testing was not repeated.

Main Article

Page created: November 01, 2022
Page updated: November 21, 2022
Page reviewed: November 21, 2022
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