Poultry lice

Definition

Ectoparasitic insects of the order Psocodea (formerly Phthiraptera) that infest domestic fowl and other gallinaceous birds, comprising both chewing lice (Mallophaga: families Menoponidae and Philopteridae) and, rarely, sucking lice (Anoplura: family Linognathidae). These obligate parasites feed on feathers, skin debris, or blood, causing irritation, feather damage, reduced egg production, and secondary infections in heavy infestations. Species such as Menacanthus stramineus (chicken body louse) and Goniocotes gallinae (fluff louse) are economically significant pests in poultry husbandry worldwide.

Etymology

From Middle English pultrie, pultry (domestic fowl kept for eggs or meat) + louse (parasitic insect)

Example

Heavy infestations of Menacanthus stramineus, the chicken body louse, can reduce egg production by 10–15% and cause anemia in young birds; control typically involves topical insecticides or diatomaceous earth applications to poultry house litter.

Synonyms

• bird lice (in part)
• avian lice (in part)

Related Terms

• Menoponidae
• Philopteridae
• chewing lice
• Sucking lice
• Ectoparasite
• host specificity
• Integrated Pest Management
• Psocodea

Usage Notes

Not a formal taxonomic group; the term aggregates multiple families and species by host association rather than phylogeny. Specialists distinguish between chewing lice (feed on feathers, epidermal scales) and the less common sucking lice (feed on blood). 'Poultry lice' excludes mammal lice and avian lice of wild birds unless those species also parasitize domestic fowl. Control discussions often emphasize species-level identification because susceptibility to insecticides varies among genera.