Dermanyssus gallinae

Definition

A haematophagous mesostigmatid mite species in the family Dermanyssidae that parasitizes poultry and a broad range of wild birds and mammals. An obligate blood-feeding ectoparasite, it is a major pest of the poultry industry and a vector of several avian pathogens; human infestations cause the condition known as gamasoidosis. Morphologically similar to the northern fowl mite (Ornithonyssus sylviarum), it is distinguished by its nocturnal feeding habit and off-host refuge behavior in cracks and crevices of housing structures.

Etymology

From Greek derma (skin) + nysso (to prick), and Latin gallinae (of hens).

Example

Heavy infestations of Dermanyssus gallinae in layer hen facilities cause anemia, reduced egg production, and increased bird mortality; integrated pest management relies on monitoring nocturnal mite populations on roosting birds and treating structural refugia.

Synonyms

• poultry red mite
• red poultry mite
• chicken mite

Related Terms

• Ornithonyssus sylviarum
• Mesostigmata
• Dermanyssidae
• gamasoidosis
• haematophagy
• Ectoparasite
• Vector

Usage Notes

Often confused with Ornithonyssus sylviarum (northern fowl mite), which remains on the host continuously; D. gallinae leaves the host after feeding and hides in the environment, making control more difficult. The term 'red mite' refers to its color after blood-feeding, not to its taxonomic identity. In medical contexts, human infestation is specifically termed gamasoidosis to distinguish it from other acariases.