Ancylostomiasis
钩虫病
08动医2班
Speaker：赖华英
Partner：余剑敏 罗宇声
利 钊 覃捷梅
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Introduction
引言
References
参考书
Control
控制
Morphology
形态学
Ancyloslomiasis
Life cycle
生活周期
钩虫病
Epidemiology
流行病学
Diagnosis
诊断
Lesions
病变
Symptoms
症状
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1 Introduction
钩口科（Ancylostomatidae）
1,Ancylostoma caninum犬钩口线虫
2,Unciaria stenocephala狭头弯口线虫
3, Ancylostomiasis braziliense巴西钩口线虫
4, Ancylostomiasis ceylanicum锡兰钩口线虫
5,Necator americanus美洲板口线虫(Human)
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2 Morphology
The egg of 4-cell stage
The oval-shaped(椭圆的) egg of Ancylostoma caninum
65μm×37μm, obtuse（钝的） in the ends, colourless and
translucent（半透明的）.
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The egg of 8-cell stage
The mulberry-like egg
If the sample was placed for a long time, the egg of
4-cell stage will change into 8-cells stage or
mulberry-shaped(桑葚状).
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Copulatory bursa
cutting plates with teeth
Buccal capsule
Side of female tail
Ancylostoma caninum
Unciaria stenocephala
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Ancylostoma
Site of
colour
infection
male
female The color/shape/size of
egg
Buccal
capsuel
Small
intestine
yellowish
white
10~1
2mm
14~16
mm
yellow
5~8.5 7~10m -/ovalmm
m
shaped/65~80um×40~5
0 um
The main
differential
diagnosis
is the
cutting
plate
caninum
Unciaria
stenocephala
Small
intestine
beige/ovalshaped/55~76um×34~4
5um
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3 Life cycle
Host：dog and
cat
Direct life cycle
Site of infection：
small intestine
Infective stage：
filariform(丝状
蚴)
Diagnostic stage：
egg
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Three Routes
• Transcolostral: Infected bitch nurse offspring
the larvae
• Infection through ingestion:gut wall
circulation
liver heart
lung alveoli
coughed up
and swallowed
small intestine
• Infection through the skin:skin circulation
heart
lung alveoli
coughed up and
swallowed
small intestine
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人钩虫的生活史
lung
In the intestine
heart
egg
filariform larva
morula
L3
rhabtidiform larva
L2
L1
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3 Life cycle
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4 Epidemiology
Ancylostoma caninum is one of the most
common parasites in dogs and is
widespread in the world.
Routes of infection: peroral infection( 经口
传染) 、by the skin(经皮肤) 、 via the
placental(通过胎盘) or colostrum (初乳)
This disease occurs most in summer.
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5 Signs or Symptoms
1.Acute type:
emaciation(消瘦)、pale mucosa(黏膜苍白)、
decreased appetite(食欲减退)、vomiting(呕
吐)、gastricism(消化障碍)、diarrhea(下痢)
、constipation(便秘)、bloody stool (粪便带
血)、anaemia(贫血)
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2.Chronic type:
light anaemia、malnutrition(营养不
良)、gastrointestinal dysfunction(胃
肠功能紊乱)
3.Uncinarial dermatitis(钩虫性皮炎)
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6 Lesions
Hemorrhage(出血)、ulcer on intestinal
mucosa
Dermatitis(皮炎)
Pneumorrhagia(肺出血) and pneumonia(肺
炎)
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16
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7 Diagnosis
1.
2.
3.
4.
Direct smear
Flotation method
Fecal culture
IFA
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8 Control
1. The treatment of the dogs and cats
Drug of choice is dimphenol(二碘硝基酚).
Other effective drugs include
levamisole (左旋咪唑), albendazole(丙硫
咪唑), ivermectin(伊维菌素).
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2. Comprehensive prevention
(1) Treating sick dogs and cats in time
and avoid feeding dogs and cats with raw
foods.
(2) Keep the dogtery(犬舍) dry, feces
management（粪便处理), Kill eggs by
boiling water and solarization.
(3) Deratization(灭鼠).
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9 References
【1】 韦华，杨玉荣. 宠物犬犬钩虫的调查及
生活史各期形态观察[J] . 中国人兽共患病
学报.2006,22(8):789-791
【2】 李国清.兽医寄生虫（双语版）[M]．北
京：中国农业出版社，2006,339-342
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Thank you！
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