Prosthogonimus spp(前殖吸虫)

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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
P.anatinus家鸭前殖吸虫
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 second
intermediate host
Metacercaria(囊
蚴)
The first
intermediate
host
Mother
sporocyst(母
胞蚴)
Daughter
sporocyst(子
胞蚴)
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(In the 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)
then anorexia(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
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