On the Hydrogen-Ion Concentration of Myiotic Wounds and Its Relation to the Oviposition Stimulus in Cochliomyia Americana C. and P.

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  • Division of Insects Affecting Man and Animals, Bureau of Entomology and Plant Quarantine, U. S. Department of Agriculture, Washington, D. C.
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Myiasis is the term used when referring to the presence of and resultant disturbances caused by fly larvae living parasitically on the tissues of man and other animals. Myiasis is classified, according to the part of the body invaded by the larvae, as cavity and wound, intestinal, cutaneous, etc. Post-myiasis is the period between the time all the larvae have left the wound and the time of recovery or death of the host.

This paper, which deals only with myiasis occurring in wounds, is a report on the determination of the hydrogen-ion concentration of exudates of wounds infested with the larvae of Cochliomyia americana C. and P., the primary screwworm fly, and the apparent relationship between the hydrogen-ion concentration and the oviposition stimulus of these flies. It is hoped that the information gained in this investigation will aid in the solution of a complex and economically important problem concerning the health of man and animals in the Southeastern and Southwestern States.