26 Bacteria & Fungi

Michelle To and Valentin Villatoro

Images show peripheral blood smears with bacteria present. Neutrophils show toxic changes (toxic vacuolation and granulation are most prominent) and contain ingested bacteria. Bacteria is also present extracellularly. From MLS Collection, University of Alberta.

Image 1: 50x oil immersion. https://doi.org/10.7939/R3NV99S2S

Image 2: 100x oil immersion. https://doi.org/10.7939/R3J38KZ9T

Image 3: 100x oil immersion. https://doi.org/10.7939/R38K75C0V

 

Appearance: 

The morphology of a microorganism depends on the type of microorganism (fungi or bacteria) present in the blood. Can be seen extracellularly or intracellularly when patient is septic.1

 

Organisms:1

Fungi:

Yeast

Histoplasma capsulatum

Cryptococcus neoformans

Bacteria: 

Clostridium perfringens

Bartonella bacilliformis

Cocci

Other Bacilli/Rods


References:

1. Smith LA. Hemolytic anemia: nonimmune defects. In: Clinical laboratory hematology. 3rd ed. New Jersey:  Pearson; 2015. p. 372-87.

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A Laboratory Guide to Clinical Hematology by Michelle To and Valentin Villatoro is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License, except where otherwise noted.

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