Line 539: |
Line 539: |
| **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''=== |