| Machupo virus |
| Virus classification |
| Group: |
Group V ((−)ssRNA) |
| Family: |
Arenaviridae |
| Genus: |
Arenavirus |
| Species |
|
Machupo virus
|
| Bolivian hemorrhagic fever |
| Classification and external resources |
| Specialty |
Infectious disease |
| ICD-10 |
A96.1 |
| ICD-9-CM |
078.7 |
| DiseasesDB |
31899 |
| MeSH |
D006478 |
|
[edit on Wikidata]
|
Bolivian hemorrhagic fever (BHF), also known as black typhus or Ordog Fever, is a hemorrhagic fever and zoonotic infectious disease originating in Bolivia after infection by Machupo virus.[1]
BHF was first identified in 1963 as an ambisense RNA virus of the Arenaviridae family,[2][3] by a research group led by Karl Johnson. The mortality rate is estimated at 5 to 30 percent. Due to its pathogenicity, Machupo virus requires Biosafety Level Four conditions, the highest level.[4]
In February and March 2007, some 20 suspected BHF cases (3 fatal) were reported to the El Servicio Departamental de Salud (SEDES) in Beni Department, Bolivia, and in February 2008, at least 200 suspected new cases (12 fatal) were reported to SEDES.[5] In November 2011, a SEDES expert involved in a serosurvey to determine the extent of Machupo virus infections in the Department after the discovery of a second confirmed case near the departmental capital of Trinidad in November, 2011, expressed concern about expansion of the virus' distribution outside the endemic zone in Mamoré and Iténez provinces.[6][7]
Contents
- 1 Epidemiology
- 1.1 History
- 1.2 Vectors
- 1.3 Symptoms
- 1.4 Prevention
- 2 Weaponization
- 3 Vaccine Research
- 4 References
Epidemiology
History
The disease was first encountered in 1962, in the Bolivian village of San Joachim, hence the name "Bolivian" Hemorrhagic Fever. When initial investigations failed to find an arthropod carrier, other sources were sought before finally determining that the disease was carried by infected mice. Although mosquitoes were not the cause as originally suspected, the extermination of mosquitoes using DDT to prevent malaria proved to be indirectly responsible for the outbreak in that the accumulation of DDT in various animals along the food chain led to a shortage of cats in the village; subsequently, a mouse plague erupted in the village, leading to an epidemic.[8]
Vectors
The vector is the Calomys callosus (large vesper mouse), a rodent indigenous to northern Bolivia. Infected animals are asymptomatic and shed the virus in excreta, thereby infecting humans. Evidence of person-to-person transmission of BHF exists but is believed to be rare.[9]
Symptoms
The infection has a slow onset with fever, malaise, headache and myalgia, very similar to Malaria symptoms. Petechiae (blood spots) on the upper body and bleeding from the nose and gums are observed when the disease progresses to the hemorrhagic phase, usually within seven days of onset.[9] Severe hemorrhagic or neurologic symptoms are observed in about one third of patients. Neurologic symptoms involve tremors, delirium, and convulsions. The mortality rate is about 25%.[10]
Prevention
Measures to reduce contact between the vesper mouse and humans may have contributed to limiting the number of outbreaks, with no cases identified between 1973 and 1994. Although there are no cures or vaccine for the disease, a vaccine developed for the genetically related Junín virus which causes Argentine hemorrhagic fever has shown evidence of cross-reactivity to Machupo virus, and may therefore be an effective prophylactic measure for people at high risk of infection. Post infection (and providing that the person survives the infection), those that have contracted BHF are usually immune to further infection of the disease.[9]
Weaponization
Bolivian hemorrhagic fever was one of three hemorrhagic fevers and one of more than a dozen agents that the United States researched as potential biological weapons before the nation suspended its biological weapons program.[11] It was also under research by the Soviet Union, under the Biopreparat bureau.[12]
Vaccine Research
Investigational vaccines exist for Argentine hemorrhagic fever and RVF; however, neither is approved by FDA or commonly available in the United States.[citation needed]
The structure of the attachment glycoprotein has been determined by X-ray crystallography and this glycoprotein is likely to be an essential component of any successful vaccine.[13]
References
- ^ Public Health Agency of Canada: Machupo Virus Pathogen Safety Data Sheet, http://www.phac-aspc.gc.ca/lab-bio/res/psds-ftss/machupo-eng.php, Date Modified: 2011-02-18.
- ^ "Machupo". Retrieved 2009-01-22.
- ^ Webb PA, Johnson KM, Mackenzie RB, Kuns ML (July 1967). "Some characteristics of Machupo virus, causative agent of Bolivian hemorrhagic fever". Am. J. Trop. Med. Hyg. 16 (4): 531–8. PMID 4378149.
- ^ Center for Food Security & Public Health and Institute for International Cooperation in Animal Biologics, Iowa State University: Viral Hemorrhagic Fevers Caused by Arenaviruses, http://www.cfsph.iastate.edu/Factsheets/pdfs/viral_hemorrhagic_fever_arenavirus.pdf, last updated: February 23, 2010.
- ^ Aguilar PV, Carmago W, Vargas J, Guevara C, Roca Y, Felices V, et al. Reemergence of Bolivian hemorrhagic fever, 2007–2008 [letter]. Emerg Infect Dis [serial on the Internet] 2009 Sep. Available from http://wwwnc.cdc.gov/eid/article/15/9/09-0017.htm. Accessed 2 Dec 2011.
- ^ "Caso confirmado de fiebre hemorrágica alerta a autoridades benianas," Los Tiempos.com, "Archived copy". Archived from the original on 2012-03-15. Retrieved 2012-11-29. , 16/11/2011.
- ^ "SEDES movilizado para controlar brote de fiebre hemorrágica en Beni; También se Capacita a Los Comunarios y Estudiantes," Lost Tiempos.com, "Archived copy". Archived from the original on 2011-12-01. Retrieved 2012-11-29. , 30/11/2011.
- ^ Medical Microbiology 2nd edition; Mims et al. Mosby publishing 1998, p 371
- ^ a b c Kilgore, et al., (1995).
- ^ Patterson M, Grant A, Paessler S (2014). "Epidemiology and pathogenesis of Bolivian hemorrhagic fever". Current Opinion in Virology. 5: 82–90. doi:10.1016/j.coviro.2014.02.007. PMC 4028408 . PMID 24636947.
- ^ "Chemical and Biological Weapons: Possession and Programs Past and Present", James Martin Center for Nonproliferation Studies, Middlebury College, April 9, 2002, accessed November 14, 2008.
- ^ Alibek, Ken and Steven Handelman (1999), Biohazard: The Chilling True Story of the Largest Covert Biological Weapons Program in the World - Told from Inside by the Man Who Ran It, Random House, ISBN 0-385-33496-6.
- ^ Bowden, Thomas A.; Crispin, Max; Graham, Stephen C.; Harvey, David J.; Grimes, Jonathan M.; Jones, E. Yvonne; Stuart, David I. (2009-08-15). "Unusual Molecular Architecture of the Machupo Virus Attachment Glycoprotein". Journal of Virology. 83 (16): 8259–8265. doi:10.1128/JVI.00761-09. ISSN 0022-538X. PMC 2715760 . PMID 19494008.
|
Zoonotic viral diseases (A80–B34, 042–079)
|
| Arthropod-borne |
| Mosquito-borne |
| Bunyavirales |
- Arbovirus encephalitides: La Crosse encephalitis
- Batai virus (BATV)
- Bwamba Fever (BWAV)
- California encephalitis
- Jamestown Canyon virus
- Tete virus
- Tahyna virus (TAHV)
- Viral hemorrhagic fevers: Rift Valley fever
- Bunyamwera fever (BUNV)
- Ngari virus (NRIV)
|
| Flaviviridae |
- Arbovirus encephalitides: Japanese encephalitis
- Australian encephalitis
- Saint Louis encephalitis
- Usutu virus
- West Nile fever
- Viral hemorrhagic fevers: Dengue fever
- Yellow fever
- Zika fever
|
| Togaviridae |
- Arbovirus encephalitides: Eastern equine encephalomyelitis
- Western equine encephalomyelitis
- Venezuelan equine encephalomyelitis
- Chikungunya
- O'Nyong-nyong fever
- Ross River fever
- Semliki Forest virus
- Sindbis fever
|
| Reoviridae |
|
|
| Tick-borne |
| Bunyavirales |
- Viral hemorrhagic fevers: Crimean–Congo hemorrhagic fever
- Heartland virus
- Bhanja virus
- Sandfly fever Naples virus
- Lone Star virus
- Tete virus
|
| Flaviviridae |
- Arbovirus encephalitides: Tick-borne encephalitis
- Powassan encephalitis
- Viral hemorrhagic fevers: Omsk hemorrhagic fever
- Kyasanur forest disease
- Langat virus (LGTV)
|
| Reoviridae |
- Colorado tick fever
- Kemerovo tickborne viral fever
|
|
| Sandfly-borne |
| Bunyavirales |
- Adria virus (ADRV)
- Pappataci fever
- Sandfly fever Naples virus
- Oropouche fever
- SFTS virus
|
| Rhabdoviridae |
|
|
|
| Mammal-borne |
| Rodent-borne |
| Arenaviridae |
- Viral hemorrhagic fevers: Lassa fever
- Venezuelan hemorrhagic fever
- Argentine hemorrhagic fever
- Brazilian hemorrhagic fever
- Bolivian hemorrhagic fever
- LUJV
- CHPV
|
| Bunyavirales |
- Hemorrhagic fever with renal syndrome
- Hantavirus pulmonary syndrome
|
|
| Bat-borne |
| Filoviridae |
- Viral hemorrhagic fevers: Ebola virus disease
- BDBV
- EBOV
- SUDV
- TAFV
- Marburg virus disease
- MARV
- RAVV
|
| Rhabdoviridae |
|
| Paramyxoviridae |
|
|
| Primate-borne |
| Herpesviridae |
|
| Retroviridae |
- Simian foamy virus
- HTLV-1
- HTLV-2
|
| Poxviridae |
- Tanapox
- Yaba monkey tumor virus
|
|
| Multiple vectors |
|
|
Bibliography
- Kilgore PE, Peters CJ, Mills JN, et al. (1995). "Prospects for the control of Bolivian hemorrhagic fever". Emerging Infect. Dis. 1 (3): 97–100. doi:10.3201/eid0103.950308. PMC 2626873 . PMID 8903174.
[1]
- ^ Medical Microbiology 2nd Edition Mims et al. Mosby Publishing 1998 p 371