Screwworm Meaning: Definition, Examples, and Translations
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screwworm
[ˈskruːwɜːrm ]
Definition
parasitic insect
A screwworm is the larval stage of certain species of flies that infest and feed on living tissue of warm-blooded animals. These insects are known for causing severe damage and suffering in livestock and can lead to significant economic losses in agriculture. The most notorious species is the primary screwworm, Cochliomyia hominivorax, which primarily affects livestock and can also infect humans under specific circumstances. Effective control measures involve both biological and chemical methods to reduce their populations and prevent infestation.
Synonyms
Examples of usage
- The rancher had to treat his cattle for screwworm infestations.
- Screwworms pose a serious threat to the health of livestock.
- The veterinary team implemented a plan to eliminate screwworms from the region.
Translations
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Interesting Facts
Biology
- Screwworms are part of the family Calliphoridae and primarily affect livestock.
- Their larvae can grow up to 2 inches long and are capable of causing severe tissue damage.
- In a healthy environment, adult flies can lay hundreds of eggs in a single wound, quickly increasing their numbers.
History
- Screwworm infestations were a significant problem for farmers, especially in the Americas, until the mid-20th century.
- An eradication program using sterilization techniques was successfully implemented in the 1950s and 60s, dramatically reducing their population.
Economics
- Livestock operators face massive economic losses due to screwworm infestations, impacting meat production.
- Control programs can cost millions but save even more in livestock health and productivity.
Public Health
- Screwworms are not a threat to human health, but their larvae can be harmful to pets and domestic animals.
- Research into screwworm biology has contributed to our understanding of other parasitic infections affecting animals.
Origin of 'screwworm'
Main points about word origin
- The term screwworm comes from the larvae's spiral shape, resembling a screw.
- The word combines 'screw,' referring to its shape, and 'worm,' which is a common term for larvae.
The term 'screwworm' originates from its characteristic behavior of burrowing into living tissue, resembling a screw. The term has been in use since at least the 19th century, and it particularly became prominent in the context of agriculture and veterinary science. The screwworm is closely associated with the life cycles of certain fly species, especially in the family Calliphoridae. Early studies in entomology helped to identify and describe these pests, leading to advancements in control methods. The economic impact of screwworm infestations prompted researchers to develop innovative strategies, including sterile insect techniques, which have significantly reduced their populations in various regions around the world. The term continues to be relevant in discussions surrounding pest management and animal health.