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| + | *Red mite of poultry |
| − | {{Podcasts
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| − | |link = http://media.bloomsburymediacloud.org/podcasts/wikivet-english/dermanyssus-gallinae-in-poultry
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| − | {{Taxobox
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| − | |name =''Dermanyssus gallinae''
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| − | |phylum =Arthropoda
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| − | |order =Mesostigmata
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| − | |family =Dermanyssidae
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| − | |genus =Dermanyssus
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| − | |species =''D.gallinae''
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| − | }}
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| − | Also Known As: '''''Poultry Mite — Red Poultry Mite — Poultry Red Mite — Chicken Mite'''''
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| − | ==Introduction==
| + | *Spends most of time '''off''' the host |
| − | [[Image:Dermanyssus.jpg|thumb|right|250px]] [[Image:Gallinae.jpg|thumb|right|250px]]
| + | **Adults and nymphs visit poultry at night to feed |
| − | ''Dermanyssus gallinae'' are '''ectoparasitic or [[Non-Burrowing Mites|surface mites]] of poultry''' and other bird species (both wild and domesticated). | |
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| − | ''D. gallinae'' are superficially similar to spider mites. They are generally '''white or greyish in colour, becoming darker or redder''' when engorged with blood after feeding. They have few hairs on their body and have hooks on their long legs. | + | *Life cycle takes '''1 week''' |
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| − | ''D. gallinae'' are considered one of the most '''serious pests''' of poultry<ref name="Chauve">Chauve, C., 1998. '''The poultry red mite ''Dermanyssus gallinae'' (De Geer, 1778): current situation and future prospects for control.''' ''Veterinary Parasitology'' 79: 239-245</ref>. Mites affect hens both directly and indirectly, where they may serve as vectors for diseases such as [[Salmonellosis]] and [[Borrelia anserina|avian spirochaetosis]]<ref name="Valiente">Valiente Moro, C., De Luna, C.J., Tod, A., Guy, J.H., Sparagano, O.A.E., Zenner, L., 2009a. '''The poultry red mite (''Dermanyssus gallinae''): a potential vector of pathogenic agents. In: Sparagano, O.A.E. (Ed.), Control of poultry mites (Dermanyssus).''' ''Exp. Appl. Acarol''. 48, 93-104.</ref> . ''D. gallinae'' may also feed from livestock although the relationship between ''D. gallinae'' and mammalian hosts is stll poorly understood.
| + | *Adults can survive several months without feeding so reservoirs can build up |
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| − | ''D. gallinae'' may also feed upon humans, causing dermatitis and skin lesions in people.<ref name="Cafiero">Cafiero, M.A., Camarda, A., Circella, E., Santagada, G., Schino, G., Lomuto, M., 2008. '''Pseudoscabies caused by ''Dermanyssus gallinae'' in Italian city dwellers: a new setting for an ld dermatitis.''' ''J Eur Acad Dermatl Venereol'' 22: 1382-1383.</ref>
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| − | ==Distribution==
| + | '''Appearance''' |
| − | Japan, Australia, Brazil, and most of Northern Hemisphere including Europe and the USA.
| + | *Spider like mite with long legs |
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| − | ==Signalment==
| + | *White or grey |
| − | Though '''poultry''' (specifically laying eggs) are the primary host of ''D. gallinae'', a range of domestic and wild birds can be infested<ref> Moss, W. W (1978) '''The mite genus Dermanyssus: a survey, with description of ''Dermanyssus trochilinis'', n. sp. and a revised key to the species (Acari: Mesostigmata: Dermanyssisdae)'''. ''J Med Entomology'' 14:627-640</ref>. The mites can also affect mammals and people<ref name="Cafiero"/>, particularly where cohabitation with bird species occurs. Infestations of this nature are usually transient, presenting only when preferred avian hosts become unavailable (e.g. when young birds vacate nests in loft spaces).
| + | **Becomes red when engorged with blood after feeding |
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| − | Chicks and young birds are more susceptible.
| + | *Few hairs on body |
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| − | ==Life Cycle==
| + | *Hooks on legs |
| − | ''D. gallinae'' progresses through '''5 life stages''': egg, larva, protonymph, deutonymph and adult<ref>Maurer, V., Baumgärtner, J (1992). '''Temperature influence on life table statistics of the chicken mite ''Dermanyssus gallinae'' (Acari: Dermanyssidae)'''. ''Experimental & Applied Acarology'', 15(1):27-40; 19.</ref>. All stages except larvae require a bloodmeal in order to progress to the next stage.<ref>Collins, D. S., Cawthorne, R. J. G (1976) '''Mites in poultry houses'''. ''Agric Northern Ireland,'' 51:24-26</ref>
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| − | Development may take '''less than a week''' under optimal conditions<ref name="Maurer">Maurer, V. & Baumgärtner, J., 1992. '''Temperature influence on life table statistics of the chicken mite ''Dermanyssus gallinae'' (Acari: Dermanyssidae)'''. ''Experimental and Applied Acarology'' 15: 27-40.</ref> . Adults spend most of their time away from the host and can survive several months without feeding.<ref name="Axtell">Axtell, R.C., 1999. '''Poultry integrated pest management; status and future.''' ''Integrated Pest Management Reviews'' 4: 53-73.</ref> Most bloodfeeding occurs at night, with mites seeking refuge in cracks and crevices during daylight hours.
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| − | ==Clinical Signs==
| + | '''Pathogenesis''' |
| − | ''Dermanyssus gallinae'' are '''blood sucking mites''', causing lesions usually found on the breast and legs of hens. For their hosts, feeding can cause '''pain, irritation, restlessness and a decrease in egg production'''<ref name="Chauve"/>. Pustules, scales, scabs, hyperpigmentation and feather loss may develop locally. If secondary infection occurs, lesions may also exhibit a foul odour. | + | *Blood sucking mite |
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| − | If they are present in large numbers, ''D. gallinae'' can cause '''[[Anaemia|anaemia]]''' in hens with consequent pallor, weakness and lethargy. Pallor may be especially pronounced in the comb and wattle.
| + | *Lesions usually found on the breast and legs |
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| − | Newly hatched chicks can rapidly die if infested.
| + | *Irritation, restlessness, decrease in egg production |
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| − | ==Diagnosis==
| + | *Anaemia can result if mites are present in large numbers |
| − | Diagnosis in flocks of laying hens is usually based on a '''history''' of decreasing egg production, anaemia, mortalities in young or ill birds and/or direct observation of mites either on birds or in refugia present in their vicinity (e.g. nest boxes, perches, etc.).
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| − | '''Blood-spotting''' (reddish-black drops of squashed mites and/or mite faeces) of eggs may be used to diagnose ''D. gallinae'' infestation.
| + | *Newly hatched chicks can rapidly die if infested |
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| − | Finally, '''specially-designed traps''' made from corrugated cardboard traps can be used to monitor premises for ''D. gallinae''.
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| − | ==Treatment==
| + | '''Treatment''' |
| − | Treatment of mites depends primarily upon [[Ectoparasiticides|ectoparasiticides]], applied directly to hens or poultry units, often between flock cycles. Many compounds are effective, but '''food hygiene regulations and withdrawal periods''' should be considered when selecting a treatment. It is advisable to alternate the compound used in order to minimise resistance, which is already emerging.
| + | *Acaricide |
| − | It should be noted that Ivermectin does not work against ''D. gallinae''.
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| − | ==Control==
| + | *Environmental treatment |
| − | In addition to curative treatment with [[Ectoparasiticides|ectoparasiticides]], several preventative measures are recommended to control ''D. gallinae'' infestations. These include use of '''Hazard Analysis - Biological Control'''<ref name="Mul">Mul, M.F. & Koenraadt, C.J.M., 2009. '''Preventing introduction and spread of ''Dermanyssus gallinae'' in poultry facilities using the HACCP method.''' ''Experimental and Applied Acarology'' 48: 167-181</ref><ref name="Lesna">Lesna, I., Wolfs, P., Faraji, F., Roy, L., Komdeur, J & Sabelis, M.W., 2009. '''Candidate predators for biological control of the poultry red mite ''Dermanyssus gallinae''.''' ''Experimental and Applied Acarology'' 48: 63-80.</ref> agents and '''improved premise design''' <ref name="Mul1">Mul, M., van Niekerk, T., Chirico, J., Maurer, V., Kilpinen, O., Sparagano, O., Thind, B., Zoons, J., Moore, D., Bell, B., Gjevre, A.-G., Chauve, C., 2009. '''Control methods for ''Dermanyssus gallinae'' in systems for laying hens: results of an international seminar'''. ''World’s Poultry Science Journal'' 65: 589-600.</ref>.
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| − | | + | *Remove wild bird nests |
| − | {{Learning
| + | [[Category:Non-Burrowing_Mites]][[Category:Poultry]] |
| − | |literature search= [http://www.cabdirect.org/search.html?rowId=1&options1=AND&q1=%22Dermanyssus+gallinae%22&occuring1=title&rowId=2&options2=AND&q2=&occuring2=freetext&rowId=3&options3=AND&q3=&occuring3=freetext&x=39&y=10&publishedstart=yyyy&publishedend=yyyy&calendarInput=yyyy-mm-dd&la=any&it=any&show=all ''Dermanyssus gallinae'' publications]
| + | [[Category:To_Do_-_Parasites]] |
| − | |flashcards= [[Dermanyssus gallinae Flashcards|''Dermanyssus gallinae'' Flashcards]]
| + | [[Category:To_Do_-_AimeeHicks]] |
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| − | [[Mites Flashcards]]
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| − | |Vetstream = [https://www.vetstream.com/canis/search?s=mite Mites]
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| − | }}
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| − | ==References==
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| − | <references/>
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| − | {{CABI source
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| − | |datasheet = [http://www.cabi.org/ahpc/?compid=3&dsid=85725&loadmodule=datasheet&page=2144&site=160 ''Dermanyssus gallinae'']
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| − | |date =21 June 2011
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| − | }}
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| − | <br><br><br>
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| − | {{David George
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| − | |date = 23/08/11
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| − | {{OpenPages}}
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| − | [[Category:CABI Expert Review Completed]][[Category:CABI AHPC Pages]] | |
| − | [[Category:Dermatological Diseases - Birds]] | |
| − | [[Category:Zoonoses]] | |
| − | [[Category:Non-Burrowing_Mites]] [[Category:Avian Parasites]]
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