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Trichuris trichiura - whipworm 鞭蟲 World-wide distribution Commonly found in tropical & subtropical regions High infections rates in high risk groups Male Female
Trichuris trichiura - whipworm 鞭蟲
World-wide distributionCommonly found in tropical & subtropical regionsHigh infections rates in high risk groups
Male
Female
Adult Morphology成蟲形態
長約 30~45 mm尾部彎曲蟲體未端有一交尾剌
雄蟲
長約 35~50 mm尾部呈圓形子宮位於蟲體後半內含大量蟲卵
雌蟲
寄生於人體盲腸前端細長、約佔體長 3/5
口腔極小，具一尖刀狀口牙食道細長、外層為紋細胞 (stichocytes)
後端較粗腸道及生殖系統
Penetrates anddevelops in mucosa
Embryonated egg
Larva hatchesin intestine Adults in
caecum
Egg in feaces
Infectivestage
Diagnosticstage
MAN
EXTERNAL ENVORNOMENT
Female Male
1000-7000Eggs/day
3-5 weeks
Clinical Features 臨床徵候
成蟲寄生於盲腸，蟲體前端鑽入腸黏膜，後端游離於腸腔中，以腸細胞及宿主血液作食物
Clinical Features 臨床徵候
T. trichiura
成蟲寄生於盲腸，蟲體前端鑽入腸黏膜，後端游離於腸腔中，以腸細胞及宿主血液作食物
No recongizable clinical manifestations Parasite is discovered only on
routine stool examination
Light infection 輕度感染
No of worms > 800Systemic symptoms 全身性症狀Gastrointestinal symptoms 腸胃道症狀
Heavy infection 重度感染
Clinical Features 臨床徵候Heavy infection 重度感染
The worms are distributed throughout the colon 大腸
and rectum 直腸
Frequent small blood-streaked diarrhoeal stools 血痢,Abdominal pain and tenderness 腹痛,Nauesa 噁心 and vomiting 嘔吐,Occassional rectal proplase 脫肛
Gastrointestinal symptoms 腸胃道症狀
Systemic symptoms 全身性症狀
Anemia 貧血, eosinophilia 嗜酸性白血球增多 , malabsorption 吸收不良
male
female
Laboratory Diagnosis 實驗診斷
Finding eggs in feacesSigmoidoscopy 結腸鏡 or proctoscopy 直腸鏡
T. trichiura
Egg of T. trichiura黃棕色
大小約 50~54 x 25 µm呈紡錘形或酒桶形
卵殼厚
兩端各有一透明塞狀突起 (plug)卵內細胞尚未分裂
