Faculty of Allied Medical Faculty of Allied Medical SciencesSciences

ParasitologyParasitology(MLPR-201)(MLPR-201)

fall 2013/2014fall 2013/2014

Dr. Hamdy  Badie M. El-WakilProf. of Parasitology & Public Health .

Faculty of Allied Medical Sciences.Pharos University In Alexandria,Egypt

By the end of this lecturer students should understand the classification, pathogenicity, clinical importance and clinical features ,life cycle of Nematodes .

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2- Phylum : 2- Phylum : NemathelminthesNemathelminthes

Class : NematodesThe nematodes (round worms) are elongated, nonsegmented worms that are tapered at both ends. Unlike other helminthes, nematodes have a complete system, including a mouth, an intestine that spans most of the body length and an anus. The body is protected by a tough, noncellular cuticle. Most nematodes have separate, anatomically distinctive sexes.

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The mode of transmission varies The mode of transmission varies widely, depending on the species, and widely, depending on the species, and includes direct skin penetration by includes direct skin penetration by infections larvae, ingestion of infections larvae, ingestion of contaminated soil, eating contaminated soil, eating undercooked pork, and insect bites. undercooked pork, and insect bites. The parasites can invade almost any The parasites can invade almost any part of the body: liver, kidneys, part of the body: liver, kidneys, intestines, subcutaneous tissue, or intestines, subcutaneous tissue, or eyes. eyes.

Generally, nematodes are categorized Generally, nematodes are categorized by whether they infect the intestines as by whether they infect the intestines as others tissues. Alternatively, they can be others tissues. Alternatively, they can be divided into those, for which the eggs are divided into those, for which the eggs are infectious, and those for which the larvae infectious, and those for which the larvae are infections. The most worldwide disease are infections. The most worldwide disease occurrence is ascariasis, caused by occurrence is ascariasis, caused by Ascaris Ascaris lumbricoidelumbricoide

•Family :Family :- Trichuridae e.g- Trichuridae e.gTrichuris trichiura Trichuris trichiura (whip worm)(whip worm)

(Trichuriasis)(Trichuriasis)

•AscarididaeAscarididae•Toxocara canis Toxocara canis (Dog worm)(Dog worm)

(Toxocariasis) (Toxocariasis)

- Trichinellidae- TrichinellidaeTrichinella spiralis Trichinella spiralis (Trichinosis)(Trichinosis)

•Filariidae (Filarial worms)Filariidae (Filarial worms)•(Blood & Lymphatic)(Blood & Lymphatic)•Loa loa Loa loa (Loiasis)(Loiasis)•Wuchereria bancroftiWuchereria bancrofti•Wuchereria malayiWuchereria malayi•(Filariasis or Elphantiasis)(Filariasis or Elphantiasis)

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Phylum : Nemathelminthes (Round worms)Phylum : Nemathelminthes (Round worms)

Class : NematodaClass : Nematoda

Tissues infectionsTissues infectionsIntestinal Intestinal infectionsinfections

•StrongylidaeStrongylidae•Strongyloides stercoralisStrongyloides stercoralis (Small round worm)(Small round worm)

(Strongyloidiasis)(Strongyloidiasis)

•DracunculidaeDracunculidae•- - Dracunculus medinensisDracunculus medinensis

(Guinea fire worm)(Guinea fire worm)(Drancunculiasis)(Drancunculiasis)

AncylostomidaeAncylostomidaeAncylostoma duodenaleAncylostoma duodenaleNecator americanusNecator americanus

(Old world and New world (Old world and New world hook worms)hook worms)

(Hookworm diseases)(Hookworm diseases)

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Phylum : Nemathelminthes (Round worms)Phylum : Nemathelminthes (Round worms)

Class : NematodaClass : Nematoda

Tissues infectionsTissues infectionsIntestinal Intestinal infectionsinfections

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Phylum : Nemathelminthes (Round worms)Phylum : Nemathelminthes (Round worms)

Class : NematodaClass : Nematoda

Tissues infectionsTissues infectionsIntestinal Intestinal infectionsinfections AscaridaeAscaridae

- - Ascaris lumbricoidesAscaris lumbricoides(Giant round worm)(Giant round worm)

(Ascariasis)(Ascariasis) OxyuridaeOxyuridae

- - Enterobius vermicularisEnterobius vermicularis(Entrobiasis) (Oxyuriasis)(Entrobiasis) (Oxyuriasis)

TrichostrongylidaeTrichostrongylidae- - Trichostrongylus colubriformisTrichostrongylus colubriformis

(Trichostrongyliasis)(Trichostrongyliasis)

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HOOKWORMHOOKWORMSS

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Classify Class : Nematoda ?Classify Class : Nematoda ? Draw the life cycle of Ascaris lumbricoides ,

illustrating the infective stage and diagnostic stage ?

Group of students will be selected for an assignment topic ,one of the parasites that are studied in your course.

The following points should be covered in your assignment sheets:

Name, Description, ( Morphological Characters in vivo) ,Geographic Distribution, Habitat , Disease life cycle

بغدادي السيد سعيد عاطف

خميس علي خميس كمال عاطف

حسين ابو الباري عبد ابرهيم الباري عبد

علي حسين عوض الرحمن عبد

عريبه العظيم عبد فاروق سامح احمد

الشافي عبد محمد حمدي محمد

علي حسين علي عصام محمد

حسين محمود الدين بهاء خالد

 

الرومي الفتاح عبد انور محمد الفتاح عبد

احمد الرؤوف عبد وجيه الله عبد

حسين الحافظ عبد حسين عزيزه

حسن علي حازم عال