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12 Cards in this Set
- Front
- Back
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What are the two types of ticks and how are they differentiated? Why are they of public health importance? |
Ixodidae and Argasidae ... Disease vectors (Lyme Disease, Rocky Mountain Spotted Fever) |
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What are the 3 types of Mites? |
House Dust Mite (European and American, Dermatophagoides) - feed on organic detritus Scabies (Sarcoptes scabei) Varroa (jacobsoni and destructor) |
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What is the life cycle of Scabies mites and how do they transfer? |
Adult burrows and lays eggs in hand, Larvae hatch and migrate to surface, Dig molting pouch and 2 nymph stages here, Then adult migrates and burrows again, Transfer of females by skin-to-skin contact |
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What do louse feed on? How long do they live for? How many Nymphal molts do they usually undergo? Which louse spread disease? |
Human blood 30 days 3 Nymphal Molts Body louse - Epidemic typhus |
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Where do body louse live? |
In unwashed cloth fibers, where they lay their eggs. |
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How can one identify louse? |
Yellow-light gray colours Longer than wide Pubis are the smallest, broad and flat |
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What is the capitulum of ticks? |
Chelicerae, palps, hypostome |
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How do fleas move? How are they shaped? How many legs? |
Large hind legs to jump. Oval, 2-8 mm. 6 legs. |
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Why are fleas important? |
Can be vectors of disease like bacteria (plague), protozoa (Trypanosomes), helminths (cestodes) |
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Describe the life cycle of fleas and why they are unique. |
4 Stages: egg, larvae, PUPAE IN COCOON, adult on warm-blooded host for final blood meal. |
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How to control fleas? |
Air con, dehumidifier. Anti-itch creams for treatment. |
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What 4 fleas can infect humans? |
Cat (Ctenophalides felis) Dog Oriental rat flea Human flea |
