Screw-worm fly research

Screw-worm fly research

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Credit: PHILIPPE PSAILA/SCIENCE PHOTO LIBRARY

Caption: Screw-worm fly research. Researcher collecting screw-worm flies (Cochliomyia hominivorax) that have been trapped after being released from a breeding program used to study and help control this parasitic insect. The flies were coated with a fluorescent coloured powder to allow their flying distance to be recorded as a measure of their health and strength. Screw-worm larvae (maggots) then use their sharp mandibles to dig into and eat away the living tissue of warm-blooded animals. This can severely damage or even kill the host. Photographed in the factory of the Mexico-American Commission for the Eradication of Gusano Barrenador (screw worm fly), Tuxtla-Gutierrez, Mexico.

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