Always chick for parasites
A chicken less than 1 year-old, was submitted for necropsy to the Oklahoma Diagnostic Laboratory; the chicken belonged to a flock of mixed breeds with contact with ducks. During necropsy the following parasites were recovered.
Image 1: Specimen collected at necropsy.
These mites are infrequently found on the birds due to their feeding habits. They usually hide in nests and feed during the night. They are blood feeders and their life cycle can be completed in a week, adults can survive for months without having a blood meal.
They can be differentiated from Ornithonyssus mites by observing the anal plate, the anus is located in the anterior half, while in Dermanyssus the anus is in the posterior half (Image 2). The chelicerae are long with minute chelae (Image 3).
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