Blood cell findings resembling Bartonella spp

Area of Science:

• Microbiology
• Hematology
• Pathology

Background:

• Certain Bartonella species infect red blood cells (RBCs), leading to persistent infections.
• Transmission electron microscopy (TEM) is used to identify Bartonella within erythrocytes.
• Intraerythrocytic abnormalities can be mistaken for Bartonella during TEM analysis.

Purpose of the Study:

• To detail the ultrastructural findings of Bartonella species within blood cells.
• To differentiate Bartonella from other intraerythrocytic abnormalities observed via TEM.
• To enhance the interpretation of blood cell changes in suspected bartonellosis cases.

Main Methods:

• Examination of ultrathin blood cell sections using transmission electron microscopy (TEM).
• Comparative analysis of ultrastructural morphology between Bartonella and non-Bartonella intraerythrocytic findings.
• Literature review to support the interpretation of observed morphological features.

Main Results:

• Typical triple-walled Bartonella structures were observed within erythrocytes.
• Various intraerythrocytic abnormalities, including endovesicles and irregular hemoglobin distribution, were identified.
• These abnormalities mimic Bartonella but possess distinct ultrastructural characteristics.

Conclusions:

• Detailed ultrastructural descriptions of Bartonella in blood cells are presented.
• Distinguishing Bartonella from mimicking intraerythrocytic abnormalities is crucial for accurate diagnosis.
• This study aims to improve TEM-based diagnosis of bartonellosis.