Difference between revisions of "Hippoboscidae"
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===''Melophagus'' spp.=== | ===''Melophagus'' spp.=== | ||
Revision as of 14:48, 29 March 2010
- Also known as louse flies
- The two genera of veterinary importance are Hippobosca and Melophagus
Melophagus spp.
- Also known as sheep ked
- Found worldwide
- Bites sheep and goats
- A separate species is found on deer
Recognition
- 4-6mm long
- Hairy
- Forward pointing proboscis
- Short head
- Reddish brown colouring
- Dorso-ventrally flattened
- 'Tick-like' in appearance
- Wingless
- Strong legs and claws
Life cycle
- Whole life cycle spent on the host
- Adults may survive for 1 week off the host
- Single larvae laid on fleece which pupate
- Adult keds emerge a few weeks to a few months after pupating depending on environmental temperature
Pathogenesis
- Most numerous in autumn and winter
- Located in the superficial layers of the fleece
- This aids transmission
- Long wooled breeds are most susceptible to infection
- Cause anaemia
- Wool damage
- Irritation and self-inflicted damage
- Staining by ked faeces
- Intermediate host for non-pathogenic Trypanosoma melophagium in sheep
Control
- Sheep dipping and spraying
- Shearing to decrease numbers