實(shí)驗(yàn)五-牛羊常見寄生蟲的形態(tài)特征

1、Experiment Ⅴ  The Morphological Features of the Parasites in Cattle and Goats,華南農(nóng)業(yè)大學(xué)獸醫(yī)學(xué)院,牛羊常見寄生蟲的形態(tài)特征,1. Haemonchus contortus（捻轉(zhuǎn)血矛線蟲）,The male has an asymmetrical dorsal lobe .The female usually has a vulval fla

2、p. 雄蟲交合傘有一“人”字形背肋雌蟲有一發(fā)達(dá)的橢圓形陰門蓋。,2. Oesophagostomum （食道口線蟲）,1. Oe. radiatum has two inflated collars. 輻射食道口線蟲頭囊分成兩部。2. Oe. columbianum has a pair of broad cervical alae. 哥倫比亞食道口線蟲有發(fā)達(dá)的頸側(cè)翼和1對(duì)頸乳突。3. Oe. venulosum with

3、out above features. 微管食道口線蟲無上述特征。4. Oe. asperum has an inflated cuticular cephalic vesicle. 粗紋食道口線蟲頭囊發(fā)達(dá)。,3. Toxocara (syn. Neoascaris) vitulorum （犢弓首蛔蟲）,T. vitulorum is the largest intestinal parasite of cattle .The

4、egg is subglobular, with a thick pitted shell. 犢弓首蛔蟲為牛體內(nèi)最大型線蟲；蟲卵近圓形，具凹凸不平的厚卵殼。,,,4. Bunostomum spp. （仰口線蟲）,,,Site: small intestine,5. Fasciola hepatica （肝片吸蟲）,The anterior end is conical and marked off by distinct sh

5、oulders from the body. The egg is oval, operculate, yellow and large .成蟲體前端具頭錐和肩部；蟲卵橢圓形，淡黃色，一端有卵蓋。,The ovary, testes and caeca much-branched. 肝片吸蟲的卵巢、睪丸和腸管都高度分枝。,Oral Sucker（口吸盤）,Ventral Sucker（腹吸盤）,Testis（睪丸）,Ovar

6、y（卵巢）,intestine（腸管）,肝片吸蟲 姜片吸蟲,,,,,,6. Paramphistomum （前后盤吸蟲）,The adults are small, conical, maggot-like flukesOne sucker is at the tip ，and the other at the

7、base . 蟲體呈圓錐狀；一吸盤在體前端，另一吸盤在體后端。,,前后盤吸蟲卵,橢圓形；無色或灰褐色；一端有蓋；卵內(nèi)結(jié)構(gòu)較疏松。,注意與肝片吸蟲卵比較,肝片吸蟲卵,,,7. Schistosoma japonicum（日體分體吸蟲）,The body is thread form，Unisexual, not hermaphrodite.蟲體呈圓線狀；雌雄異體；雄蟲具一抱雌溝。,8. Moniezia （莫尼茨絳蟲）,Ea

8、ch segment contain two sets of genital organs . In M. expansa interproglottidal glands forming row of rosettes, whereas in M. benedeni they are confined to short row close to the middle of proglottis margin. 每個(gè)成熟節(jié)片有兩套生

9、殖器官；貝氏莫尼茨絳蟲節(jié)間腺呈橫帶狀，而擴(kuò)張莫尼茨絳蟲的節(jié)間腺分散排成一行。,9. Cysticercus bovis （牛囊尾蚴）,The cysticercus is greyish white, about 1.0 cm in diameter.There is a scolex on the wall of cysticercus.牛囊尾蚴呈灰白色，黃豆般大小，囊壁上有一反凹頭節(jié)。,10. Coenurus cerebral

10、is （腦多頭蚴）,Site: brain,11. 棘球蚴,棘球蚴模式圖,12. Babesia bigermina （雙芽巴貝斯蟲）,Typically they are pyriform.The body is longer than the half diameter of red cell.They as pairs are often arranged at a characteristic angle with the

11、ir narrow ends opposed.蟲體長(zhǎng)度大于紅細(xì)胞的半徑，兩個(gè)梨籽形蟲體以其尖端成銳角相聯(lián)。,13. Trypanosoma （錐蟲）,Elongated spindle-shaped protozoaPossess a flagellum and an undulating membrane.蟲體呈柳葉狀；具有一根鞭毛和波動(dòng)膜；細(xì)胞核位于蟲體中部。,14. Theileria spp. （泰勒焦蟲）,Theile

12、ria annulata(環(huán)形泰勒蟲),15. Cryptosporidium spp. (隱孢子蟲),卵囊呈橢圓形，囊壁光滑，一端有裂縫。成熟卵囊含有４個(gè)裸露的香蕉形子孢子和１個(gè)殘?bào)w。,16. Mites (螨),←sarcoptes scabiei (疥螨),Psoroptes communis → (癢螨),17. Lice (虱),,血虱,毛虱,作業(yè),請(qǐng)