寄生虫学英文课件：Experimental Arthropod revised 2005.ppt

Section 8 Medical Arthropodmosquito,fly,louse,flea,tick,mite,louse,sandfly Aims and demandsnMastery of the morphological characters of mosquitoes and flies.nKnowing the morphological characters of other main medical arthropods. Anopheles Culex Aedes （eggs,larva）FloatingonthewatersurfacesinglyTobeconicalandclusteronthewatersurfaceOlive-shaped,separatelydepositedinthewaterAnopheles:nosiphonbutspiracularplate,havepalmatehairCulex&Aedes:slendorwidesiphonwithpairsofpiliaround,nopalmatehairLarvae of AnophelesLarvae of CulexLarvae of AedesAnopheles Culex Aedes （pupa,adults）Anopheles: black and white plaque in wingCules: deep brown in color, no plaque in wingAedes: black, white plaque in legsAnophelesCulexAedesFly Musca domestica(家蝇) Boettcherisca pergrina(麻蝇) Chrysomyia megacephala(大头金蝇) Lucilia sericata(丝光绿蝇)Musca domestica （house fly） 4 black strips on the thoracic back Boettcherisca pergrina3 strips on the thoracic back, to be tessellated in the dorsal abdomen Lucilia sericata Green metallic colour with silver white cheekChrysomyia megacephalaDeep reddish compound eyes, green blue metallic colorTicknCapitulum and idiosoma neight legs nidiosoma is further divided into regions as follows: podosoma: bearing the legs opisthosoma: the portion of the body posterior to legsHard tickSoft tickHard tickdorsal viewventral viewscutumFleanSmallnreddish brown to black nbilaterally flattenednwinglessFollicle miten100-400 m in length nshort, stumpy legs on the anterior half of the bodynlives in hair follicles, sebaceous glands of many species of mammals.Louse (Pediculus humanus and Pthirus pubis ) nsmall, flattened winglessndistinct head, thorax and abdomen nEach leg has a single tarsal segment with a large claw, an adaptation for clinging to the hairs of the host. Bed-bug nreddish brown, up to about 8mm long. nno wings nScent glands opening on the ventral side of the third thoracic somite produce an oil secretion and give bedbug-infested dwellings a disagreeable odorCimex lectularis,thehumanbedbug.Cimex hemipterus,thetropicalbedbug.n This image gives a good indication of the size of bedbugs. Abedbugfeedingonhumanskin.Itch mite nround or ellipticn4 pairs of legs: ambulacra (吸垫）on the anterior 2 pairs of legs non the two posterior legs of female distributed with bristles while for the fourth pair of legs of male are ambulacra Female dorsal side Male ventral sidenfemale male Larva of Chigger mite nround, red bodynconsists of capitulum and idiosoma, bearing a dorsal plate, or scutumna pair of sensillae and three to seven setae on the scutum nnumerous plumose setae distributed on the bodySandfly ngrayish whitenhold its wings at rest 60from the body. nmany hairs on the body and wings,na pair of large, dark compound eyes. 。