《人体寄生虫学 Human parasitology》课程教学课件（讲稿）Lectures 19 Flies

Fly蝇

Fly 蝇

FliesAccording to their mouth partsFlies may be classified into:1. Piercing and sucking type:blood sucking. Glossina (tsetse flies)black flies.2. Sponging and lapping type:this type is much more important

Flies According to their mouth parts, Flies may be classified into: 1. Piercing and sucking type: blood sucking. Glossina (tsetse flies), black flies. 2. Sponging and lapping type: this type is much more important

General remarks1.A large group of dipterous insects.2.Medical importance1)blood sucker2)mechanical vector3)parasites ( myiasis)

General remarks 1. A large group of dipterous insects. 2. Medical importance 1) blood sucker 2) mechanical vector 3) parasites ( myiasis)

FLY1.Externalmorphology1.1 HeadApairofcompound eyesThree single eyesantennaFly'shead

Fly'smouthpartsA few species of flyhavepiercing andsucking mouthpart.TsetseflyLabellumLappingmouthpartsMouthparts ofa housefly(Musca domestic).ShowinglabellaWith pseudotracheae.Fluid and food particles are sucked

Fly1.2ThoraxThe thorax bears three pairs of legs and a pair of wingsEach leg terminates in a pair of claws and apair of pulvilli (interdigital pod)clawInterdigitalpodEmpodium（爪间突）

Fly

Outstanding shape1. Stout(肥胖)body with short abdomen,usually with metallic luster.2. short antenna, only 3 segments, an aristaarising from dorsal side of third segment3. characterized wing venation.4. lapping mouthparts in majority5. hairy body and sticky legs, long bristles, tenuous hairson pulvilli.6. sexes: width of frons(额): separate in females, closetogether in males

Outstanding shape 1. Stout(肥胖)body with short abdomen, usually with metallic luster. 2. short antenna, only 3 segments, an arista arising from dorsal side of third segment. 3. characterized wing venation. 4. lapping mouthparts in majority. 5. hairy body and sticky legs, long bristles, tenuous hairs on pulvilli. 6. sexes: width of frons(额): separate in females, close together in males

Life CycleAdultEggPupaLarvae

Life Cycle

Egg1) Banana shaped, whitish colored 1-2 mm long.2) Hatches in 8-12 hrs.兴福

Egg 1) Banana shaped, whitish colored 1-2 mm long. 2) Hatches in 8-12 hrs

Larva (maggot )1) shape: conical, slender, creamy white withpointed head and blunt end. 12 mm long, no eyes.2) 3 instars in a duration of 4-8 ds

Larva ( maggot 蛆) 1) shape: conical, slender, creamy white with pointed head and blunt end. 12 mm long, no eyes. 2) 3 instars in a duration of 4-8 ds