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Volume 31, Number 9—September 2025

Research Letter

Human Babesiosis Caused by Babesia venatorum, Russia, 2024

Olga P. ZelyaComments to Author , Irina V. Kukina, Ludmila S. Karan, Elena A. Krasilovskaya, and Vadim V. Garin
Author affiliation: First Moscow State Medical University (Sechenov University), Moscow, Russia (O.P. Zelya, I.V. Kukina, V.V. Garin); Research Center of Neurology, Moscow (L.S. Karan); Centre for Strategic Planning of the Federal Medical and Biological Agency, Moscow (L.S. Karan); Sayanogorsk Interdistrict Hospital, Sayanogorsk, Russia (E.A. Krasilovskaya)

Main Article

Table

Characteristics of case-patient in study of human babesiosis caused by Babesia venatorum, Russia, 2024*

Tests performed
 Results by date
Oct 3
 Oct 7
 Oct 10
 Oct 14
 Oct 22
 Nov 8
 Reference range
Hematologic parameters
Hemoglobin, g/dL 11.2 9.3 11.6 11.6 12.0 15.5 11.7–18.0
Hematocrit, % 32.0 27.0 34.8 32.7 36.1 46.8 35–52
Erythrocytes, ×1012 cells/L 3.48 3.01 3.96 3.51 3.85 5.1 3.8–6.1
RBCN, L 10:100 4:100 7:100 NA NA NA 0:100
Platelets, ×109/L 21 127 154 346 230 217 150–450
Leukocytes, ×109 cells/L 4.8 8.3 7.8 5.7 9.1 10.4 4–11
Parasitemia level, %†
 2.43
 2.91
 1.56
 0
 0
 0
 0
Biochemistry
Alanine aminotransferase, U/L 7.4 22.0 NA 21.0 16.0 NA ≤40
Aspartate aminotransferase, U/L 27.0 67.0 NA 25.0 30.0 NA ≤40
Total bilirubin, μmol/L 84.9 38.1 NA 11.8 9.0 NA 3.1–16.9
C-reactive protein, mg/L 1.3 0.7 NA 1.6 4.0 NA 0–0.5
Urea, μmol/L na 7.5 NA 3.3 6.0 NA 2.5–8.3
Creatinine, mcM/L 97.0 91.0 NA 111.0 107.0 NA 53–106
Glucose, μmol/L 25.6 14.6 NA 8.4 7.5 NA 3.3–5.5
Total protein, g/L 56.0 55.0 NA 68.5 93.0 NA 62–81

*NA, not available; RBCN, red blood cell normoblasts. †Percentage of erythrocytes that were infected.

Main Article

Page created: August 05, 2025
Page updated: August 19, 2025
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