safety pin appearance

A descriptor for a morphology in which an elliptical structure has bipolar staining with central attenuation
Haematology The appearance on a peripheral blood smear of some red cells affected by thalassemia major
Microbiology The light microscopic appearance of various pathogens

safety pin appearance

the appearance of Clostridium perfringens spores in fecal examinations; the open end represents the remains of the vegetative cell.
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