Phylum: NemathelminthesClass: Nematoda

AncylostomaBy

Assist. lecturer Maytham A. Alwan

Ancylostomasuperfamily : AncylostomatoideaFamily : AncylostomatidaeSub Family : AncylostomatinaeGenus : AncylostomaSpecies : A. duodenale (human) , A. braziliense (dog and

cats), A. caninum (dog), A. tubaeforme (cats )Synonyms : hook worm

Morphology

Morphology : 1. Female 10-13 mm long is slightly larger than male 8-11 mm long. A. duodenale, 8 to 13 mm long , A. braziliense, from 8 to 11 mm long, dark in color, anterior end have a large buccal cavity containing one (A. braziliense ), two (A. duodenale ), three (A. caninum , A. tubaeforme ) pairs of sharp teeth and more or less hooked.

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Morphology

The male’s posterior end is expanded to form a copulatory bursa.

2. Eggs: 60×40 µm in size, oval in shape, shell is thin and colorless. Content is 2-8 cells.

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0.8-1 mm long1-1.4 mm longHook mouth

Digestive system

testis

Cement gland

Opening of cloaca

Copulatory spicule

ovary

uterus

vulva

vagina

Ecit opening

Ancylostoma

The oral opening of this species containscutting plates as opposed to teeth .

Ancylostoma

• Po

The posterior end showing bursa with spicules

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Ancylostoma

Life Cycle Diagram

Ancylostoma

Cutaneous larva migrans: caused by probable Ancylostoma braziliense