實驗五 牛羊常見寄生蟲的形態(tài)特征課件

ExperimentⅤ

TheMorphologicalFeaturesoftheParasitesinCattleandGoats

牛羊常見寄生蟲的形態(tài)特征1.Haemonchuscontortus（捻轉(zhuǎn)血矛線蟲）Themalehasanasymmetricaldorsallobe.Thefemaleusuallyhasavulvalflap.雄蟲交合傘有一“人”字形背肋雌蟲有一發(fā)達的橢圓形陰門蓋。2.Oesophagostomum（食道口線蟲）1.Oe.radiatumhastwoinflatedcollars.輻射食道口線蟲頭囊分成兩部。2.Oe.columbianumhasapairofbroadcervicalalae.哥倫比亞食道口線蟲有發(fā)達的頸側(cè)翼和1對頸乳突。3.Oe.venulosumwithoutabovefeatures.微管食道口線蟲無上述特征。4.Oe.asperumhasaninflatedcuticularcephalicvesicle.粗紋食道口線蟲頭囊發(fā)達。4.Bunostomumspp.（仰口線蟲）Site:smallintestine5.Fasciolahepatica（肝片吸蟲）Theanteriorendisconicalandmarkedoffbydistinctshouldersfromthebody.Theeggisoval,operculate,yellowandlarge.成蟲體前端具頭錐和肩部；蟲卵橢圓形，淡黃色，一端有卵蓋。Theovary,testesandcaecamuch-branched.肝片吸蟲的卵巢、睪丸和腸管都高度分枝。OralSucker（口吸盤）VentralSucker（腹吸盤）Testis（睪丸）Ovary（卵巢）intestine（腸管）肝片吸蟲姜片吸蟲6.Paramphistomum（前后盤吸蟲）Theadultsaresmall,conical,maggot-likeflukesOnesuckerisatthetip，andtheotheratthebase.蟲體呈圓錐狀；一吸盤在體前端，另一吸盤在體后端。7.Schistosomajaponicum（日體分體吸蟲）Thebodyisthreadform，Unisexual,nothermaphrodite.蟲體呈圓線狀；雌雄異體；雄蟲具一抱雌溝。9.Cysticercusbovis（牛囊尾蚴）Thecysticercus

isgreyishwhite,about1.0cmindiameter.Thereisascolexonthewallofcysticercus.牛囊尾蚴呈灰白色，黃豆般大小，囊壁上有一反凹頭節(jié)。11.棘球蚴棘球蚴模式圖12.Babesiabigermina（雙芽巴貝斯蟲）Typicallytheyarepyriform.Thebodyislongerthanthehalfdiameterofredcell.Theyaspairsareoftenarrangedatacharacteristicanglewiththeirnarrowendsopposed.蟲體長度大于紅細胞的半徑，兩個梨籽形蟲體以其尖端成銳角相聯(lián)。13.Trypanosoma（錐蟲）Elongatedspindle-shapedprotozoaPossessaflagellumandanundulatingmembrane.蟲體呈柳葉狀；具有一根鞭毛和波動膜；細胞核位于蟲體中部。14.Theileriaspp.

（泰勒焦蟲）Theileriaannulata(環(huán)形泰勒蟲)16.Mites(螨)←sarcopte