寄生虫学英文课件：Experimental Arthropod(2007).ppt

Section 8 Medical Arthropodmosquito,fly,louse,flea,tick,mitesand fly  [Aims and demands] Mastery of the morphological characters of mosquitoes and flies. Knowing the morphological characters of other main medical arthropods. Fly Musca domestica(家蝇) Boettcherisca pergrina(麻蝇) Chrysomyia megacephala(大头金蝇) Lucilia sericata(丝光绿蝇) Flea Small reddish brown to black bilaterally flattened wingless Louse (Pediculus humanus and Pthirus pubis ) small, flattened wingless distinct head, thorax and abdomen Each leg has a single tarsal segment with a large claw, an adaptation for clinging to the hairs of the host. Tick Capitulum and idiosoma eight legs idiosoma is further divided into regions as follows: podosoma: bearing the legs opisthosoma: the portion of the body posterior to legs Hard tick Follicle mite 100-400 μm in length short, stumpy legs on the anterior half of the body lives in hair follicles, sebaceous glands of many species of mammals. Itch mite round or elliptic 4 pairs of legs: ambulacra (吸垫）on the anterior 2 pairs of legs on the two posterior legs of female distributed with bristles while for the fourth pair of legs of male are ambulacra female Larva of Chigger mite round, red body consists of capitulum and idiosoma, bearing a dorsal plate, or scutum a pair of sensillae and three to seven setae on the scutum numerous plumose setae distributed on the body Sand-fly grayish white hold its wings at rest 60°from the body. many hairs on the body and wings, a pair of large, dark compound eyes. Bed-bug reddish brown, up to about 8mm long. no wings Scent glands opening on the ventral side of the third thoracic somite produce an oil secretion and give bedbug-infested dwellings a disagreeable odor This image gives a good indication of the size of bedbugs. Cimex lectularis, the human bedbug.? Cimex hemipterus, the tropical bedbug.? * * Anopheles Culex Aedes （eggs,larva） Floating on the water surf