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Dracunculus medinensis

Dracunculus medinensis. Guinea Worm Daniel Jackson. Description. One of the largest nematodes, males are approximately 40 mm long and females are 80 cm long May be transitional between parasites of digestive tract and filarial parasites of tissues. Transmission. Intermediate Host– copepod

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Dracunculus medinensis

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  1. Dracunculus medinensis Guinea Worm Daniel Jackson

  2. Description • One of the largest nematodes, males are approximately 40 mm long and females are 80 cm long • May be transitional between parasites of digestive tract and filarial parasites of tissues

  3. Transmission • Intermediate Host– copepod • Small crustacean • Most benthic • Some planktonic • Definitive Host– human

  4. Life Cycle Overview

  5. Life Cycle

  6. Life Cycle cont...

  7. Location • Located in parts of Asia, parts of central and eastern Africa, Brazil, Indonesia and Fiji • Correlation to areas of infection with availability of water • Usually take place near end of dry seasons

  8. Symptoms • Asymptomatic for about a year • A few days or hours before rupture has occurred: • Fever • Swelling • Pain • Usually undetectable by blood or skin biopsy until skin has ruptured • When the wound appears, abscesses, tetanus, septic arthritis or systemic sepsis (can be fatal)

  9. Treatment and Prevention Treatment • Mebendazole can be used as an anti-inflammatory but it often leads to migration of the nematode • Dracunculus medinensis can be surgically removed before ulcer forms Prevention • Always filter drinking water • Prevent infected hosts with Dracunculus medinensis from entering water sources used for drinking • Boiling and chlorine treated water kills intermediate hosts

  10. Wonderful Pictures

  11. Citations • http://ucdnema.ucdavis.edu/imagemap/nemmap/ent156html/nemas/dracunculusmedinensis • http://maven.smith.edu/~sawlab/fgn/pnb/dracmed.html

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