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→''Dermanyssus''
**Eggs may be present
**Eggs may be present
===''Dermanyssus''===
===''Dermanyssus gallinae''===
*'Red mite' of poultry
*Spends most of time '''off''' the host
**Adults and nymphs visit poultry at night to feed
*1 week life cycle
*Adults can survive several months without feeding so reservoirs can build up
'''Appearance'''
*Spider like mite with long legs
*White or grey
**Becomes red when engorged with blood after feeding
*Few hairs on body
*Hooks on legs
'''Pathogenesis'''
*Blood sucking mite
*Lesions usually found on the breast and legs
*Irritation, restlessness, decrease in egg production
*Anaemia can result if mites are present in large numbers
*Newly hatched chicks can rapidly die if infested
'''Treatment'''
*Acaricide
*Environmental treatment
*Remove wild bird nests
===''Ornithonyssus''===
===''Ornithonyssus''===