screw-worm

screw-worm
The larva of the botfly, Cochliomyia hominivorax, and other similar forms that cause human and animal myiasis.
- primary screw-worm an obligatory s. that can penetrate normal tissues and feed as a primary invader. The important myiasis flies of humans that serve as p. screw-worms are Cochliomyia hominivorax, Chrysomyia bezziana, and Wohlfahrtia magnifica.
- secondary screw-worm an accidental or facultative s. that enters a prior wound or suppurated condition and feeds on infected rather than intact tissues. Many blowflies are included, such as Calliphora vicina, Phaenicia sericata, Phormia regina, Cochliomyia macellaria, Chrysomyia species, and other fleshflies.

Medical dictionary. 2011.

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  • Screw worm — Screw Screw (skr[udd]), n. [OE. scrue, OF. escroue, escroe, female screw, F. [ e]crou, L. scrobis a ditch, trench, in LL., the hole made by swine in rooting; cf. D. schroef a screw, G. schraube, Icel. skr[=u]fa.] 1. A cylinder, or a cylindrical… …   The Collaborative International Dictionary of English

  • screw-worm — screwˈ worm noun The larva of a dipterous fly (screw worm fly) which develops under the skin of various animals, often causing death • • • Main Entry: ↑screw …   Useful english dictionary

  • screw|worm — «SKROO WURM», noun. the larva of the screwworm fly …   Useful english dictionary

  • screw worm — see screwworm …   Medical dictionary

  • screw worm — noun a large American blowfly larva which enters wounds and develops under the skin. [Cochliomyia hominivorax.] …   English new terms dictionary

  • screw-worm fly — Cochliomyia hominivorax …   Medical dictionary

  • worm — Screw Screw (skr[udd]), n. [OE. scrue, OF. escroue, escroe, female screw, F. [ e]crou, L. scrobis a ditch, trench, in LL., the hole made by swine in rooting; cf. D. schroef a screw, G. schraube, Icel. skr[=u]fa.] 1. A cylinder, or a cylindrical… …   The Collaborative International Dictionary of English

  • Screw — (skr[udd]), n. [OE. scrue, OF. escroue, escroe, female screw, F. [ e]crou, L. scrobis a ditch, trench, in LL., the hole made by swine in rooting; cf. D. schroef a screw, G. schraube, Icel. skr[=u]fa.] 1. A cylinder, or a cylindrical perforation,… …   The Collaborative International Dictionary of English

  • Screw alley — Screw Screw (skr[udd]), n. [OE. scrue, OF. escroue, escroe, female screw, F. [ e]crou, L. scrobis a ditch, trench, in LL., the hole made by swine in rooting; cf. D. schroef a screw, G. schraube, Icel. skr[=u]fa.] 1. A cylinder, or a cylindrical… …   The Collaborative International Dictionary of English

  • Screw bean — Screw Screw (skr[udd]), n. [OE. scrue, OF. escroue, escroe, female screw, F. [ e]crou, L. scrobis a ditch, trench, in LL., the hole made by swine in rooting; cf. D. schroef a screw, G. schraube, Icel. skr[=u]fa.] 1. A cylinder, or a cylindrical… …   The Collaborative International Dictionary of English

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