Clinical cases

Borrelia Spirochetes in Peripheral Blood Smear in Borreliosis

A clinical case of borreliosis and West Nile fever: detection of Borrelia spirochetes in a peripheral blood smear during microscopy.

❗A 26-year-old patient. Dual infection! Borreliosis + West Nile fever. A hot finding! A clinical case from 🇮🇱 Israel.

⚠Medical history. Two weeks ago, the patient was hospitalized in another hospital due to fever and weight loss. 🧪 IgM antibodies to West Nile virus were detected there. Platelet count was low - ↓63 thousand/µL.

✅ Reason for examination. Suspicion of lymphoproliferative or viral disease.

🩸 Today’s CBC: Hemoglobin: 124 g/L White blood cells: 11.9 thousand/µL, Platelets: 178 thousand/µL Absolute monocytosis: 1.35 thousand/µL 🔬 Spirochetes have just been found in the blood smear. Borrelia was not detected in the other hospital at that time.

‼ A tick bite led to a dual infection: West Nile fever and borreliosis.

👉 This clinical case was kindly provided by the Head of the Morphology/IFT Department of the HaEmek Medical Center Laboratory, Afula, Israel - Anna Belen.