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Pests and Diseases

Old World Screwworm

Parasitic and External Diseases of Livestock

A blowfly (Chrysomya bezziana), the Old World counterpart to the New World screwworm, whose larvae feed on the living tissue of livestock and other warm-blooded animals through open wounds across sub-Saharan Africa, the Middle East and South and Southeast Asia, causing severe and sometimes fatal wound infestations known as myiasis. Unlike the New World species, no region-wide eradication program using sterile insect release has yet succeeded against it, and it remains a significant cause of livestock losses and a standing biosecurity concern for countries, including Australia, that have so far kept it out.

Facts
Classification
Agent Kind
Insect or Mite 1
Connections

Associated With

Sheep, Livestock

The Old World screwworm fly is a major cause of traumatic myiasis in sheep across Africa, Asia, and the Middle East.

Sources
1. Old World Screwworm (Wikipedia)
Wikimedia Foundation
  • Opening definition paragraph
    Chrysomya bezziana, also known as the Old World screwworm fly or screwworm, is an obligate parasite of mammals. Obligate parasitic flies require a host to complete their development. Named to honor the Italian entomologist Mario Bezzi, this fly is widely distributed in Asia, tropical Africa, India, and Papua New Guinea. The adult can be identified as metallic green or blue with a yellow face, and the larvae are smooth, lacking any obvious body processes except on the last segment.
  • lead description
    Unlike the New World species, no region-wide eradication program using sterile insect release has yet succeeded against it, and it remains a significant cause of livestock losses and a standing biosecurity concern for countries, including Australia, that have so far kept it out.
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