Eosinophils on Leukoformula

Eosinophilia in a Blood Smear During an Allergic Reaction

Sat, 09 May 2026 09:00:01 +0300

Allergic reaction in a patient. Eosinophilia. Peripheral blood smear. Romanowsky stain.

🙏 The publication was kindly provided by Kristina Goncharova

Eosinophilic Leukemoid Reaction: Blood Smear Morphology

Tue, 19 Aug 2025 17:03:22 +0300

Eosinophilic leukemoid reaction.

Eosinophils: absolute count - 9.64 (0.02-0.5 ×10^9/L); relative count - 66% (0.5-5.0).

🙏 The clinical case was kindly provided by Vera Kirnas, Biologist at the Clinical Diagnostic Laboratory of F.S. Ankudinov Yuzhno-Sakhalinsk City Hospital.

Eosinophil Morphology in Different Animal Species

Sat, 08 Mar 2025 19:21:00 +0300

Eosinophils of various animal species

Elephant
Fennec fox
Ram
Hedgehog
Sheep
Horse
Dog
Cat

🙏 Photos kindly provided by Amira Kuznetsova, hematologist at VETLAB veterinary laboratory network, Moscow Amira Kuznetsova.

Bone Marrow Morphology in Severe Hypereosinophilia

Tue, 20 Feb 2024 19:17:49 +0300

🟠🦴“Orange” bone marrow. 🔬A clinical case from a doctor from 🇮🇱Israel - Anna Belen. ✅Hypereosinophilia in a 64-year-old female patient. 👉Eosinophils at different stages of maturation. Granular background due to degranulation.

Eosinopenia in Complete Blood Count: Clinical Significance

Wed, 02 Feb 2022 18:52:35 +0300

EOSINOPENIA - A DECREASE IN THE NUMBER OF EOSINOPHILS IN THE BLOOD. Audio consultation. Male, 29 years old. Complaints: oral rash - aphthous stomatitis, lymphadenitis, herpetic eruptions. First week of illness, temperature up to 40 C. Third week - subfebrile temperature 37 C. After antibiotic therapy. LABORATORY DATA (3rd week of illness): What is notable in the CBC is only eosinopenia, and slight monocytosis (photo below). ESR = 45 mm/h (normal up to 15 mm/h). CRP = 8.6 mg/L (normal 0-5 mg/L). In the CBC, eosinopenia - 0.0% (photo below). In the oropharyngeal swab for PCR: DNA of herpes simplex virus type I and II DETECTED, DNA of streptococcus pneumoniae DETECTED (photo below). CLINICAL SIGNIFICANCE OF EOSINOPENIA. From this clinical case, we noted that eosinopenia can sometimes be almost the sole marker of an inflammatory reaction in a complete blood count. In the future, we plan to publish a unique article on the clinical significance of decreased eosinophils in the blood. Please put a 👍 in the comments if you would like to read the publication on our website soon. In the meantime, let’s highlight the main rules for interpreting this deviation: Interpretation from the book by Kishkun A.A. - Clinical Evaluation of Laboratory Test Results, 2006 is given below: Eosinopenia — a decrease in eosinophil count (< 0.05*10^9/L) — is in most cases due to increased adrenocortical activity, which leads to the retention of eosinophils in the bone marrow. Eosinopenia is especially characteristic of the initial phase of an infectious-toxic process. A decrease in the number of eosinophils in the postoperative period indicates a severe condition of the patient. According to the msdmanuals, the number of eosinophils in the blood may decrease in Cushing’s syndrome, blood infections (sepsis), and during corticosteroid treatment.