Dermanyssus gallinae

"Red mite" redirects here. For the red spider mite, see spider mite.

Dermanyssus gallinae
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Arachnida
Subclass:	Acari
Order:	Mesostigmata
Family:	Dermanyssidae
Genus:	Dermanyssus
Species:	D. gallinae
Binomial name
Dermanyssus gallinae (De Geer, 1778)

Dermanyssus gallinae
Classification and external resources
ICD-10	B88.0 (ILDS B88.060)

Dermanyssus gallinae (also known as the red mite, poultry mite, red poultry mite and chicken mite) is an ectoparasite of poultry and other bird species.

Description

The mites are blood feeders and attack resting birds at night. They are generally white or greyish in colour, becoming darker or redder when engorged with blood. After feeding, they hide in cracks and crevices away from daylight, where they mate and lay eggs. The mite progresses through 5 life stages: egg, larva, protonymph, deutonymph and adult. Under favourable conditions this life cycle can be completed within seven days, so populations can grow rapidly - causing anaemia in badly affected flocks of poultry. Young birds are most susceptible. The mites can also affect the health of the birds indirectly, as they may serve as vectors for diseases such as Salmonellosis, avian spirochaetosis and Erysipelothrix rhusiopathiae.^[1]

Dermansyssus gallinae can also feed on some species of mammals, including humans,^[2][3][4] - causing dermatitis and skin lesions. However the mite needs an avian host to reproduce.

Clinical signs and diagnosis

The mites normally feed around the breast and legs of hens, causing pain, irritation, and a decrease in egg production. Pustules, scabs, hyperpigmentation and feather loss may develop.

If they are present in large numbers, D. gallinae can cause anaemia in hens which presents as pallor of the comb and wattle.

A presumptive diagnosis can be made in flocks of laying hens, usually based on a history of decreasing egg production, anaemia and mortalities in young or ill birds. Definitive diagnosis is only achieved following identification of eggs, faeces or the mites themselves

Treatment and prevention

Ectoparasiticides can be used to treat affected poultry. These chemical controls, if used, should be used in rotation to avoid the build up of resistance. Red mites can survive for up to 10 months in an empty hen house. Creosote treatment of wood will kill mites.

References

1. ^ Chirico J, Eriksson H, Fossum O, Jansson D (June 2003). "The poultry red mite, Dermanyssus gallinae, a potential vector of Erysipelothrix rhusiopathiae causing erysipelas in hens". Medical and Veterinary Entomology 17 (2): 232–4. PMID 12823843. http://www3.interscience.wiley.com/resolve/openurl?genre=article&sid=nlm:pubmed&issn=0269-283X&date=2003&volume=17&issue=2&spage=232. 
2. ^ Bellanger AP, Bories C, Foulet F, Bretagne S, Botterel F (March 2008). "Nosocomial dermatitis caused by Dermanyssus gallinae". Infection Control and Hospital Epidemiology 29 (3): 282–3. doi:10.1086/528815. PMID 18205530. http://www.journals.uchicago.edu/doi/abs/10.1086/528815?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub%3dncbi.nlm.nih.gov. 
3. ^ Haag-Wackernagel D, Bircher AJ (2010). "Ectoparasites from feral pigeons affecting humans". Dermatology (Basel) 220 (1): 82–92. doi:10.1159/000266039. PMID 20016127. http://content.karger.com/produktedb/produkte.asp?typ=fulltext&file=000266039. 
4. ^ Akdemir C, Gülcan E, Tanritanir P (2009). "Case report: Dermanyssus gallinae in a patient with pruritus and skin lesions". Türkiye Parazitoloji Dergisi 33 (3): 242–4. PMID 19851974. http://www.tparazitolderg.org/pubmed.php3?year=2009&volume=33&issue=3&page=242. 

External links

• Dermanyssus gallinae, at WikiVet