Top Qs
Timeline
Chat
Perspective

Ravn virus

Virus that causes hemorrhagic fever From Wikipedia, the free encyclopedia

Remove ads

Ravn virus (/ˈrævən/;[1] RAVV) is a close relative of Marburg virus (MARV). RAVV causes Marburg virus disease, a form of viral hemorrhagic fever in humans and nonhuman primates.[2] RAVV is a select agent,[3] World Health Organization Risk Group 4 Pathogen (requiring Biosafety Level 4-equivalent containment),[4] National Institutes of Health/National Institute of Allergy and Infectious Diseases Category A Priority Pathogen,[5] Centers for Disease Control and Prevention Category A Bioterrorism Agent,[6] and listed as a Biological Agent for Export Control by the Australia Group.[7]

Quick Facts Virus classification ...
Remove ads

Use of term

Ravn virus (today abbreviated RAVV, but then considered identical to Marburg virus) was first described in 1987 and is named after a 15-year old Danish boy who fell ill and died from it.[8] Today, the virus is classified as one of two members of the species Marburg marburgvirus, which is included into the genus Marburgvirus, family Filoviridae, order Mononegavirales. The name Ravn virus is derived from Ravn (the name of the Danish patient from whom this virus was first isolated) and the taxonomic suffix virus.[1]

Remove ads

Previous designations

Ravn virus was first introduced as a new subtype of Marburg virus in 1996.[8] In 2006, a whole-genome analysis of all marburgviruses revealed the existence of five distinct genetic lineages. The genomes of representative isolates of four of those lineages differed from each other by only 0-7.8% on the nucleotide level, whereas representatives of the fifth lineage, including the new "subtype", differed from those of the other lineages by up to 21.3%.[9] Consequently, the fifth genetic lineage was reclassified as a virus, Ravn virus (RAVV), distinct from the virus represented by the four more closely related lineages, Marburg virus (MARV).[1]

Remove ads

Virus inclusion criteria

A virus that fulfills the criteria for being a member of the species Marburg marburgvirus is a Ravn virus if it has the properties of Marburg marburgviruses and if its genome diverges from that of the prototype Marburg marburgvirus, Marburg virus variant Musoke (MARV/Mus), by ≥10% but from that of the prototype Ravn virus (variant Ravn) by <10% at the nucleotide level.[1]

Disease

RAVV is one of two marburgviruses that causes Marburg virus disease (MVD) in humans.[10] In the past, RAVV has caused the following MVD outbreaks:

Marburg virus disease (MVD) outbreaks due to Ravn virus (RAVV) infection
Year Geographic location Human cases/deaths (case-fatality rate)
1987 Kenya 1/1 (100%)[8]
1998–2000 Durba and Watsa, Democratic Republic of the Congo  ? (A total of 154 cases and 128 deaths of marburgvirus infection were recorded during this outbreak. The case fatality was 83%. Two different marburgviruses, RAVV and Marburg virus (MARV), cocirculated and caused disease. It has never been published how many cases and deaths were due to RAVV or MARV infection)[11][12][13]
2007 Uganda 0/1 (0%)[14][15]
Remove ads

Ecology

In 2009, the successful isolation of infectious RAVV was reported from caught healthy Egyptian rousettes (Rousettus aegyptiacus).[14] This isolation, together with the isolation of infectious MARV, strongly suggests that Old World fruit bats are involved in the natural maintenance of marburgviruses.[14]

References

Further reading

Loading related searches...

Wikiwand - on

Seamless Wikipedia browsing. On steroids.

Remove ads