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Prosthogonimosis 前殖吸虫病. The team members: 付敏敏 高琦 卢清霞 岳慧敏 曾玉桂. 1.Introduction. Prosthogonimidae (前殖科) Prosthogonimus (前殖属) host:chicken 、 duck 、 goose 、 wild duck and other birds site:oviduct (输卵管) Bursa Fabricii (法氏囊) cloaca (泄殖腔) recta (直肠) ,sometimes in the egg (偶见于蛋).
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Prosthogonimosis前殖吸虫病 The team members: 付敏敏 高琦 卢清霞 岳慧敏 曾玉桂
1.Introduction • Prosthogonimidae(前殖科) • Prosthogonimus(前殖属) • host:chicken、duck、goose、wild duck and other birds • site:oviduct(输卵管)Bursa Fabricii(法氏囊)cloaca(泄殖腔)recta(直肠),sometimes in the egg(偶见于蛋)
Morphology(five species) • P.ovatus卵圆前殖吸虫 • P.cuneatus楔形前殖吸虫 • P.pellucidus透明前殖吸虫 • P.rudolphi鲁氏前殖吸虫 • P.anatinus家鸭前殖吸虫 • P.japonicus日本前殖吸虫 • P.cantonensis广州前殖吸虫
P.ovatus卵圆前殖吸虫 P.cuneatus楔形前殖吸虫
P.pellucidus透明前殖吸虫 P.rudolphi鲁氏前殖吸虫
Genital pore(生殖孔) Mouth(口) Oral Sucker (口吸盘) pharynx(咽) esophagus(食道) Cirrus sac(雄茎囊) Ventral Sucker (腹吸盘) Intestine(肠管) Vas deferens(输精管) Ovary(卵巢) Testis(睾丸) Mehlis’s gland(梅氏腺) Vitellaria(卵黄腺) Uterus(子宫) Prosthogonimus spp(前殖吸虫)
Life cycle Adults(成虫) The second intermediate host Definitive host(终末宿主) Egg(虫卵) The first intermediate host The second intermediate host Mother sporocyst(母胞蚴) Daughter sporocyst(子胞蚴) Metacercaria(囊蚴) Cercaria(尾蚴)
Life cycle • The first intermediate host : freshwater snail(淡水螺),eg:Bithynia leachi(豆螺)and Gyraulus albus(白旋螺) • the second intermediate host :the nympho and adult of all kinds of dragonfly(各种蜻蜓的成虫或幼虫)
Life cycle • egg(卵)miracidium(毛蚴)sporocyst(胞蚴) cercaria(尾蚴)metacercaria(囊蚴 )adult(成虫) • 注意:无雷蚴阶段! • Sporocyst(In the first intermediate host) Metacercaria(Inthe second intermediate host) Adult (In the final host) Egg、miracidium、cercaria、metacercaria (In the environment)
Epidemiology • Prosthogonimus is a widespread parasite of chicken,duck,goose,wild duck and other birds. • The epidemic season and the season of dragonflies appeared consistent in each of 4-5 months.
signs • Initial ill chicken hens decline(产蛋量下降),appear deformity eggs:soft shells eggs(软壳蛋)or no shell eggs(无壳蛋) • thenanorexia(食欲减退) ,listless(精神萎靡) ,emaciation(消瘦);eduction egg shell fragments(卵壳碎片)or lime water(石灰水) liquid ;instability of gait (步态不稳);
Abdominal depilate(脱毛), skin lime sample feces pollution, cloaca (泄殖腔) mucosal highly flush(潮红 )。
Lesions • oviduct phlogistic(输卵管发炎) • oviduct mucous hyperemia(充血) extreme thickening(增厚), there is red worm body • Sometimes occurred peritonitis(腹膜炎);abdominal cavity has a large yellow turbidity exudate(渗出液)
the concentration of the yolk (卵黄)can be seen among the intestinal tubes(肠管)。Serosa(浆膜) occurred obvious congestion (充血)and hemorrhage(出血) . Sometimes visible dry peritonitis(干性腹膜炎 )
诊断(Diagnosis) • Symptoms diagnosis(临床症状) :emaciation(消瘦), listless(精神委靡), instability of gait(步态不稳) and so on • Postmortem examination(病理剖检) ; • Stool examination(粪检): sedimentation method(沉淀法)
Control(控制)N0.1 prevention • Periodic deworming(定期驱虫); • Killing intermediate host (freshwater snail淡水螺); • Prevent them pecking(啄食) dragonflies(蜻蜓) and their larvaes; • Grazing management
Control(控制)N0.2 treatment • Treatment:we can use Carbon tetrachloride(四氯化碳) with equal amount of Paraffin oil(石蜡油) to inject their crops(嗉囊) in the early stage; • Deworming:Hexachlorethane(六氯乙烷),Albendazole(丙硫苯咪唑&抗蠕敏),Praziquantel(吡喹酮)
References • 李国清.兽医寄生虫学(双语版).北京:中国农业大学出版社,2006 • 李祥瑞主编.动物寄生虫彩色图谱.中国农业出版社,2004