Volume 29, Number 3—March 2023
Research Letter
Babesia microti Causing Intravascular Hemolysis in Immunocompetent Child, China
Jiafeng Yao1, Guoging Liu1, Yang Zou, Jin Jiang, Shaogang Li, Heng Wang, Xiaoling Cheng, Rui Zhang, Kaige Zhang, Chunyan Wei
, and Runhui Wu
, and Runhui Wu
Table
Laboratory test results for Babesia microti causing intravascular hemolysis in immunocompetent child, China*
| Variable | Age-adjusted reference value or range | Value |
|---|---|---|
| Epstein-Barr virus |
Negative |
Negative |
| Mycoplasma pneumoniae | Negative | Positive |
| IgM titer | <1:80 | 1:80 |
| Drug-resistance gene |
Negative |
Negative |
| Leukocyte count, × 109 cells/L | 4.9–12.7 | 4.36 |
| Erythrocyte count, × 1012 cells/L | 4.1–5.5 | 2 |
| Hemoglobin, g/L | 115–150 | 57 |
| Mean corpuscular volume, μm3 | 76–88 | 83 |
| Mean corpuscular hemoglobin concentration, g/L | 309–359 | 343 |
| Platelet count, × 109/L | 187–475 | 100 |
| % Reticulocytes | 0.5%–2.5% | 2.07% |
| Clotting function |
NA |
Normal |
| Bilirubin, μmol/L | ||
| Total | 3.42–20.5 | 55.98 |
| Direct | 0–3.42 | 13.76 |
| Indirect |
0–17.1 |
42.22 |
| Aspartate aminotransferase, U/L | 14–44 | 196.2 |
| Alanine aminotransferase, U/L | 7–30 | 187.6 |
| Lactate dehydrogenase, U/L |
110–295 |
2,899 |
| Antiglobulin tests | ||
| IgG | Negative | Negative |
| C3d | Negative | Negative |
| DAT | Negative | Negative |
| Control |
Negative |
negative |
| Spot urine sample | ||
| Urine color | Light yellow | Brown |
| Ketone body | Negative | 1+ |
| Protein | Negative | 2+ |
| Urinary bilirubin |
Negative |
1+ |
| Occult blood | Negative | 3+ |
| Centrifugal microscopy for erythrocytes, HPF | 0–3 | 0 |
| Centrifugal microscopy for leukocytes, HPF |
0–3 |
0 |
| Chest computed tomography |
NA |
Few shadows in lower lobe of right lung, no exudative lesion |
| Abdominal ultrasound | NA | Splenomegaly |
*DAT, direct antiglobulin test; HPF, high-power field; NA, not applicable.
1These authors contributed equally to this article.
Page created: December 27, 2022
Page updated: February 21, 2023
Page reviewed: February 21, 2023
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