DR. E. WALKER / SCIENCE PHOTO LIBRARY DR. E. WALKER / SCIENCE PHOTO LIBRARY
Contaminated cervical smear. Light micrograph of a cervical smear contaminated with an insect. The insect probably became trapped in the smear during preparation of the slide. The small red and purple dots in the smear are cells collected from the uterine cervix. These are examined during a smear test to check for abnormalities, which may indicate the onset of cancer. Magnification: x140 when printed 10cm wide.
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