How does Dracunculus Medinensis enters its host?
Humans become infected by drinking unfiltered water containing copepods (small crustaceans) which are infected with larvae of D. medinensis . Following ingestion, the copepods die and release the larvae, which penetrate the host stomach and intestinal wall and enter the abdominal cavity and retroperitoneal space .
What is the intermediate host of a guinea-worm?
They are usually found in stagnant bodies of fresh water such as wells and ponds in poor agricultural communities in rural or periurban areas. In sub-Saharan Africa, India and Yemen they are the intermediate hosts of guinea worm, Dracunculus medinensis, a parasite that causes guinea-worm disease or dracunculiasis.
Where is Dracunculus Medinensis found in the human body?
and Dracunculus medinensis are present in subcutaneous tissue, causing pain and swelling or chronic ulcers with protrusion of worms.
What is the reservoir for Guinea worm disease?
Guinea-worm disease is transmitted exclusively by drinking stagnant water contaminated with tiny water fleas that carry infective guinea-worm larvae. Inside the body, the larvae mature into worms, growing up to 1 metre in length. People are the only known reservoirs for the disease.
What does Dracunculus Medinensis do?
What diseases are caused by Dracunculus medinensis? Dracunculus medinensis causes the disease dracunculiasis which is commonly referred to as Guinea worm disease (GWD). Individuals become infected by drinking water containing water fleas harboring the Guinea worm larvae.
What is the vector of Dracunculus Medinensis?
Vector Control The vector for GWD is the copepod. To control this vector, the GWEP puts a measured amount of the approved chemical temephos (ABATE®*) into the water sources that are suspected or known to be contaminated with Guinea worm-infected copepods.
What is the infective stage of Dracunculus Medinensis?
medinensis larvae develop to an infective stage within 14 days. When the infected copepod is ingested by a mammalian host, by drinking unfiltered water the copepod is then dissolved by stomach acid and dies and the D.
Is Dracunculus Medinensis parasite?
Abstract. Dracunculiasis (Guinea worm disease) is caused by Dracunculus medinensis, a parasitic worm that emerges through the skin about 1 year after acquiring infection from contaminated drinking water.
Is Guinea worm a waterborne disease?
Dracunculiasis, also called Guinea-worm disease, is a parasitic infection by the Guinea worm, Dracunculus medinensis. A person becomes infected from drinking water that contains water fleas infected with guinea worm larvae….
| Dracunculiasis | |
|---|---|
| Usual onset | One year after exposure |
| Causes | Guinea worm-infected water fleas |
Is Dracunculus Medinensis a filarial worm?
Dracunculus medinensis, the guinea worm, is not a true filarial worm, but is often grouped with the filariae.
What are the hosts of Dracunculus medinensis?
Dracunculus medinensis has two hosts, copepods and humans. The human is the Guinea worm’s only definitive host and the copepod is its most common intermediate host. Copepod populations fluctuate according to the seasons and because copepods are the primary intermediate host for D. medinensis, the parasite populations also fluctuate accordingly.
What is the cause of Dr dracunculiasis?
Dracunculiasis (Guinea worm disease) is caused by the nematode (roundworm) Dracunculus medinensis. Humans become infected by drinking unfiltered water containing copepods (small crustaceans) which are infected with larvae of D. medinensis.
How long does it take for dracuncunculus medinensis to emerge?
The worm emerges as a whitish filament (duration of emergence: 1 to 3 weeks) in the center of a painful ulcer, accompanied by inflammation and frequently by secondary bacterial infection. A female Dracuncunculus medinensis in a human host.
Is Dracunculus medinensis a nematode?
The single species causing the disease in humans, Dracunculus medinensis (Linnaeus, 1758; Gallandant, 1773), belongs to the nematode superfamily Dracunculoidea of the order Spirurida. Most spirurids are tissue parasites and produce eggs containing larvae or free larvae which require arthropod intermediate hosts.