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General issues of Vaccine
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General issues of Tropical med.
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General issues of Travel med.
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Trematode (fluke, distoma)
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昆虫と非昆虫
- Invertebrate
- Arthropod
- Insects including mosquito
- Tick
- 外骨格 exoskelton
- 骨に比べて外骨格は重量物を支持するのが困難なため,虫類は一定以上の大きさを持てない
- 変温動物 poikilothermic
- 完全変態 complete metamorphosis
- egg (ovo) - larva - pupa - adult
- 不完全変態 incomplete metamorphosis
- egg (ovo) - nymph - adult
Arthropod-borne diseases
Arthropod-borne diseasesは50以上ある
- 半分はmosquito-borne
- 残り半分近くがtick-borne
- Chagas d.
- true bugs: Triatoma, Rhodnius
- Onchocerciasis
- Leishmaniasis
- Sleeping sickness
感染経路
- blood feeding
- mechanical transmission
- direct mechanical transmission
- thru wound by biting or scratching
- indirect mechanical transmission
- Chagas via Triatoma's feces
Mosquitos
- mosquito species > 3,500
- disease-transmitting mosquito species ≈ 300
Non-venomous invertebrates
- Bedbug
- Cimex lectularius
- insecticide-resistant bedbug is becoming problem worldwide
blood-sucking vectors
- mono-directional between host and vector
- Phthiraptera (lice)
- Hemiptera (kissing bug)
- bi-directional between host and vector
- Diptera (mosquito, fly)
- Siphonaptera (flea)
- Lepidoptera