《人体寄生虫学 Human parasitology》课程教学课件（讲稿）Lectures 10.Whipworm

Review :AscarislumbricoidesLIFE CYCLE:1. Site of inhabitation: small intestine2. Infective stage: embryonated eggs3. Route of infection: by mouth4.Nointermediate and reservoirhosts5. Man is only final host6. Migration through the lung where the larvaedevelops and molt twice

Review :Ascaris lumbricoides LIFE CYCLE: 1. Site of inhabitation: small intestine 2. Infective stage: embryonated eggs 3. Route of infection: by mouth 4. No intermediate and reservoir hosts 5. Man is only final host 6. Migration through the lung where the larvae develops and molt twice

Clinicalmanifestation.Loeffler's Syndrom （LarvalPneumonia)Adult:loss appetite、nausea、vomit、intermittentabdominal (umbilicus)painComplications:Biliary ascariasis,Intestinal perforationIntestinalobstructionetc

Clinical manifestation • Loeffler’s Syndrom（Larval Pneumonia） • Adult: loss appetite、nausea、vomit、intermittent abdominal (umbilicus) pain Complications: Biliary ascariasis、Intestinal perforation、 Intestinal obstruction etc

Trichuris trichiura p224(p172)(Whip worm)

Trichuris trichiura p224(p172) (Whip worm)

GeneralIntroductions:(l)1.A common nematode residing in the large intestine(colon),2. Worldwide distributed in the same areas where theAscaris and hookworm are found.3. Although trichuris infections are usually not seriousclinically, overwhelming infections leading to deathhave been reported in children

General Introductions: (1) 1.A common nematode residing in the large intestine (colon). 2. Worldwide distributed in the same areas where the Ascaris and hookworm are found. 3. Although trichuris infections are usually not serious clinically, overwhelming infections leading to death have been reported in children

Morphyology: adultslooks like a buggy whip.the anterior 3/5 is thin,coliled and the posterior 2/5 isthick.It is pinkish gray in colorFemaleMale

Morphyology: adults looks like a buggy whip. the anterior 3/5 is thin,coliled and the posterior 2/5 is thick. It is pinkish gray in color

Thefemalewormis3-5cminlengthandhas alongslenderesophagealregionThemaleis smallerthan thefemaleand has a curved tailMaleFemale

The female worm is 3-5 cm in length and has a long slender esophageal region. The male is smaller than the female and has a curved tail

Live whipwormAdults in gutAnteriorportionslender, firmlyinsert into themucosa虫体纤细前端钻入肠粘膜至粘膜下层组织后端则裸课露在肠腔内

A typical T.trichiura egg50-55by22-24umbarrelorspindlea brown, smooth shell.with a translucent polarplug at either ends.contains an undevelopedcell

A typical T.trichiura egg 50-55 by 22-24µm barrel or spindle a brown, smooth shell, with a translucent polar plug at either ends. contains an undeveloped cell

X100. EnlargedX 400. Enlarged

×400. Enlarged ×100. Enlarged

Ttrichiura egg:Detail of bipolarprominences.(Hyaline plugs)

T.trichiura egg: Detail of bipolar prominences. (Hyaline plugs)