Pdf vectors of venezuelan equine encephalitis virus in. Members of the vee complex are distributed throughout america and have been. Nucleotide identities across the region encoding the nsp4 protein for rnv ranged from 95. Venezuelan equine encephalitis vee epidemics or epizootics involving hundreds of thousands of equine and human cases have occurred in the americas since the 1930s 1,2. Safety and immunogenicity study of the venezuelan equine. Venezuelan equine encephalitis is caused by the venezuelan equine encephalitis virus, an alphavirus belonging to the togaviridae family. In 1962, a total of human cases were detected by serologic testing in campeche and champoton, state of campeche 3,6.
Encefalitis equina venezolana pdf transcript of encefalitis equina venezolana. Encephalitis peste loca venezuelan encephalitis venezuelan equine fever s l i d e 2 overview organism history epidemiology transmission disease in humans disease in animals prevention and control actions to take center for food security and public health, iowa state university, 2011. Las encefalitis equina este, del oeste y venezolanainfecciones virales, transmitidas por mosquitos pueden causar encefalitis grave en equinos y humanos. Mosquitoborne encephalitis in humans and equine transmission arthropodborne viruses e. Of the several strains of the virus, the most prevalent are the a group, which includes the eastern, western, and venezuelan strains, and the b group, which includes the japanese and. Encefalomielite equina do leste no distrito federal e entorno. Encefalomielite equina do leste no distrito federal e entorno eastern equine encephalitis on federal district of brazil and surrounding areas susy karoline. Eastern equine encephalitis eee is a rare but serious viral disease spread by mosquitoes that can affect people and horses.
Epidemiology the estimated annual incidence of encephalitis in the uk is 4100,000. Las encefalitis equina venezolana, del este, del oeste y del nilo occidental eev. Isolates from 1991 formosa and 1980 chaco presented higher values of identity, which varied between 99. Equine epizootics of venezuelan equine encephalitis vee occurred in the southern mexican states of chiapas in 1993 and oaxaca in 1996.
Eastern equine encephalitis triple e is an illness caused by a virus that comes from an infected mosquito bite. Encefalitis equina venezolana, del este y oeste by. Eastern equine encephalitis genetic and rare diseases. Venezuelan equine encephalitis virus veev causes rapid, catastrophic swelling of the brain and spinal cord, leading to severe neurological symptoms and in many cases sudden death in animals. Venezuelan equine encephalitis vee is a reemerging mosquitoborne viral disease that is severely debilitating and sometimes fatal to humans. It is 70 nm in diameter and has an enveloped single stranded rna genome 2, 3. Most people who are infected have no symptoms, but some may develop fever, headaches, and vomiting. Alphavirus, one of the major alphavirus serogroups found in the new world.
It is caused by the venezuelan equine encephalitis virus and is a significant disease in the americas. This virus is most commonly seen in horses in the southeastern us with several hundred cases reported each year. Venezuelan equine encephalitis is contracted by the bite of an infected mosquito, primarily culex melanoconion or aedes. Genetic and evolutionary characterization of venezuelan. Samples argch43 and argcba448 were the most divergent, presenting 95. Drugs would reduce venezuelan equine encephalitis virus bioterrorism threat, counter natural outbreaks. Experimental inoculation of cattle with venezuelan equine. Listing a study does not mean it has been evaluated by the u. The virus of vee can be transmitted to humans by mosquito. Human serosurveys and risk analyses indicated longterm endemic. Es transmitido por mosquitos y es una enfermedad emergente en equinos, humanos y animales silvestres. Eee can also cause disease in captive birds such as the ringnecked pheasant, emu, ostriches, quail and ducks. Encefalitis equina venezolana by andreina colina on prezi.
Venezuelan equine encephalitis virus listed as veev. The events which led to the containment of venezuelan equine encephalitis vee as it was carried into southern texas from mexico in 1971 are a tribute to dr. Venezuelan equine encephalitis viruses veev in argentina. Venezuelan equine encephalitis viruses veev are responsible for human diseases in the americas, producing severe or mild illness with symptoms indistinguishable from dengue and other arboviral. Su historia y distribucion geografica 1973 the mosquitos of guatemala. Venezuelan equine encephalitis definition of venezuelan. This spherical arbovirus belongs to the togaviridae family and is an alphavirus. To assess the impact of continuing circulation of vee virus veev on human and animal populations, serologic and viral isolation studies were conducted in 20002001 in chiapas state. A mosquitoborne virus that usually causes mild and selflimiting disease in humans, characterised by symptoms that resemble influenza or dengue fever e. Most horses that develop disease are young and unvaccinated, but. Although there are no recent reports of the disease, it could be a potential biological weapon as it can cause serious nervous system sequelae. Meningoencephalitis is an inflammatory process involving both the brain and meninges. Encephalitis is inflammation of the brain, often caused by a viral infection.
Encefalitis venezolana, fiebre equina venezolana ultima actualizacion. Symptoms of venezuelan equine encephalitis including 14 medical symptoms and signs of venezuelan equine encephalitis, alternative diagnoses, misdiagnosis, and correct diagnosis for venezuelan equine encephalitis signs or venezuelan equine encephalitis symptoms. Decs bireme this study was part of a thesis to obtain the degree of public health at central university of. Venezuelan equine encephalitis virus circulates between a mosquito vector, usually culex melanoconion, and forest rodents in central and south america. Venezuelan equine encephalitis virus media in category venezuelan equine encephalitis virus the following 2 files are in this category, out of 2 total. Venezuelan equine encephalomyelitis, veev, vee, venezuelan equine fever, arbovirus. Equine encephalitis, severe viral disease of horses and mules. Utcvm large animal clinical sciences eastern equine. Experimental inoculation of cattle with venezuelan equine encephalomyelitis virus, strain tc83.
Association of venezuelan equine encephalitis virus subtype ie with two equine encefqlitis in mexico. Eee, eeo y eno respectivamente son zoonosis transmitidas por mosquitos. It is characterized by the acute onset of a febrile illness, myalgia, nausea, vomiting and encephalitis. Drugs would reduce venezuelan equine encephalitis virus. History organism venezuelan encephalitis peste loca. Venezuelan equine encephalitis an alphavirus infection first identified in a sick horse in venezuela in 1938, which occurs as an epizootic infection in central and northern south america. The etiological agent, vee virus veev, belongs to the vee complex togaviridae. In mexico, human vee was first recognized during the 1960s along the atlantic coast 35. Eastern equine encephalitis eee, also known as sleeping sickness, is a viral disease of horses that involves transmission between birds or rodents and mosquitoes. Las encefalitis equina este, del oeste y venezolana infecciones virales, transmitidas por mosquitos pueden causar encefalitis grave en equinos y humanos.
Venezuelan equine encephalitis is an acute viral disease characterized by fever, chills, headache, nausea, vomiting, lumbosacral pain, and myalgia, which may progress to encephalitis. Encefalitis equina del este minnesota department of health. Venezuelan equine encephalitis virus, southern mexico. Venezuelan equine encephalitis virus how is venezuelan.
414 253 630 382 219 1138 379 99 396 1263 893 1137 658 1628 253 785 520 1085 415 796 169 339 992 602 121 1352 1436 695 967 1651 712 407 1578 1611 541 850 820 1405 474 1095 1354 1110 528 1171 1050 1301 1005 1469 688