Mansonella streptocerca

Mansonella streptocerca
Mansonella streptocerca
Scientific classification
Kingdom: Animalia
Phylum: Nematoda
Class: Secernentea
Order: Spirurida
Family: Onchocercidae
Genus: Mansonella
Species: M . streptocerca
Binomial name
Mansonella streptocerca

Mansonella streptocerca, (formerly Diptalonema streptocerca), is the scientific name of a human parasitic roundworm causing the disease of streptocerciasis. It is a common parasite in the skin of humans in the rain forests of Africa, where it is thought to be a parasite of chimpanzees as well.[1]

Mansonella streptocerca is one of four filarial nematodes that cause Subcutaneous Filariasis in humans. The other three filarial nematodes are Loa loa (the African eye worm), Onchocerca volvulus (river blindness), and Dracunculus medinensis (the guinea worm).

Contents

Geographic Distribution

West Africa.

Life cycle

Life cycle of Mansonella streptocerca

The contraction of a Mansonella infection can be better understood through an understanding of its life cycle. The life cycle involves two stages: one involving a Midge (genus Culicoides) and another involving a human host. First, a Midge ingests a blood meal from a human host. This allows a third-stage filarial larvae to enter the bite wound. Once inside the dermis, the larvae develop into adults, usually less than 1 mm from the surface of the skin. In terms of size, the females can reach 27 mm in length, whereas the males can be around 50 micrometers in diameter. These adults then produce non-periodic microfiliariae, which habituate in the skin but can also travel to the peripheral blood. These microfilariae are then passed onto the midge when the insect ingests a blood meal. Following the blood meal, microfilariae travel to the midge’s midgut through the hemocoel to the thoracic muscles. In the thoracic muscles the microfiliariae develop into first-stage larvae, followed up by third-stage development. In this latter stage the larvae travel to the midge’s proboscis, where it can subsequently infect another human host upon another blood meal ingestion. [2]

Morphology

The adult form of M. streptocerca was discovered by Dr. Wayne M Meyers while working as a medical missionary in Africa.

Disease

Diagnosis

Treatment

See also

References

  1. ^ foundations of parasitology, 8th ed, p 473-474... from Meyers, 2000, in Hunter's tropical medicine and emerging infectious disease 8th ed.
  2. ^ http://www.dpd.cdc.gov/DPDx/HTML/Frames/A-F/Filariasis/body_Filariasis_m_streptocerca.htm

External links


Wikimedia Foundation. 2010.

Игры ⚽ Нужно сделать НИР?

Look at other dictionaries:

  • Mansonella streptocerca — a species found in humans and chimpanzees in western and central Africa, transmitted by biting flies of genus Culicoides. The microfilariae, which may be found in scarification smears, are sometimes confused with those of Onchocerca volvulus.… …   Medical dictionary

  • Mansonella perstans — Loa loa (right) and M. perstans (left) Scientific classification …   Wikipedia

  • Mansonella — A genus of filaria, widely distributed in tropical Africa and South America, that infects the peritoneal cavity, serous surfaces, or skin of humans and other primates with unsheathed microfilariae. The important human parasites M. perstans and M …   Medical dictionary

  • microfilaria streptocerca — the microfilaria of Mansonella streptocerca, found in the subcutaneous tissues …   Medical dictionary

  • Mansonelliasis — (or mansonellosis) is the condition of infection by the nematode Mansonella. The disease exists in Africa and tropical Americas, spread by biting midges or blackflies. It is usually asymptomatic. Mansonella Scientific classification Kingdom:… …   Wikipedia

  • Filariose — Klassifikation nach ICD 10 B73 Onchozerkose B74 Filariose (exkl. Onchozerkose, durch Filarien ausgelöste Tropische (pulmonale) Eosinophilie) …   Deutsch Wikipedia

  • МАНСОНЕЛЛЁЗ — мед. Мансонеллёз глистная инвазия из группы филяриозов (фи ляриатозов), протекающая с лихорадкой, аллергическими высыпаниями на коже, болями в суставах, эозинофилией. Этиология Возбудители нематоды Mansonella ozzardi, Mansonella perstans и… …   Справочник по болезням

  • Dipetalonema — A genus of nematode filariae with species in humans and many other mammals; as with other filarial worms, it produces microfilariae in blood or tissue fluids, with adults found in deep connective tissue, membranes, or visceral surfaces. [G. di ,… …   Medical dictionary

  • streptocerciasis — Infection of humans and higher primates with the nematode Mansonella streptocerca. * * * strep·to·cer·ci·a·sis (strep″to sər kiґə sis) infection with Mansonella streptocerca, whose microfilariae produce a pruritic rash resembling… …   Medical dictionary

  • Filariasis — Saltar a navegación, búsqueda Filariasis Clasificación y recursos externos Aviso médico …   Wikipedia Español

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”