- A: Pneumocystis
carinii trophozoites in broncho-alveolar
lavage (BAL) material. Giemsa stain.
The trophozoites are small (size: 1 to 5 µm),
and only their nuclei, stained purple, are
visible (arrows). AIDS patient seen in
Atlanta, Georgia.
- Courtesy of the CDC, used with
permission
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