Case Series
Flea-Borne Typhus as a COVID-19 Mimic: A Report of Four Cases
Table 1
Initial laboratory values for patients 1–4.
| | Analyte | Pt 1 | Pt 2 | Pt 3 | Pt 4 | Reference range | Units |
| | Sodium | 134 | 132 | 132 | 138 | 136–145 | mmol/L | | Potassium | 3.2 | 4.3 | 3.8 | 4.0 | 3.5–5.1 | mmol/L | | Creatinine | 0.60 | 0.8 | 1.0 | 0.91 | 0.7–1.3 | mg/dL | | Albumin | 3.0 | 4.0 | 3.9 | 3.4 | 3.5–5.7 | g/dL | | Aspartate aminotransferase | 88 | 308 | 113 | 40 | 13–39 | IU/L | | Alanine aminotransferase | 94 | 378 | 261 | 83 | 7–52 | IU/L | | Total bilirubin | 0.9 | 0.4 | 2.4 | 0.4 | 0.3–1.0 | mg/dL | | Urine protein | n.d. | 30 | >500 | 0 | 0 | mg/dL | | C-reactive protein | 147.8 | 45.6 | 121.1 (day 3) | 83.6 | <10.0 | mg/L | | Procalcitonin | 0.32 | 0.62 | 3.63 | n.d. | <0.5 | ng/mL | | Ferritin | n.d. | >1500 | >1500 | n.d. | 10–322 | ng/mL | | D-dimer | n.d. | 988 | 11,982 | n.d. | 0–230 | ng/mL | | White blood cell count | 8.88 | 8.2 | 6.2 | 8.07 | 4–10 | 103/μL | | Hemoglobin | 11.1 | 14.7 | 14.8 | 14.0 | 12.8–17.1 | g/dL | | Platelets | 104 | 270 | 134 | 282 | 150–400 | 103/μL | | Lactate dehydrogenase | n.d. | 553 | 438 | n.d. | 140–271 | IU/L | | Absolute lymphocyte count | 440 | 1900 | 300 | 2020 | 900–3100 | cells/μL | | CD4 | n.d. | 1046 | n.d. | n.d. | 323–1546 | cells/μL | | CD8 | n.d. | 534 | n.d. | n.d. | 170–1154 | cells/μL | | CD3 | n.d. | 1651 | n.d. | n.d. | 452–2943 | cells/μL | | CD19 | n.d. | 240 | n.d. | n.d. | 35–519 | cells/μL | | CD16 + CD56 | n.d. | 193 | n.d. | n.d. | 44–451 | cells/μL |
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n.d., not determined.
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