Infection of humans can be caused by bites from infected insects and animals. The onset of symptoms is sudden and dramatic, and the death rate for VHF can be as high as 90 per cent. One major symptom is bleeding (haemorrhage).
What is VHF infection?
Viral hemorrhagic fevers (VHFs) refer to a group of illnesses that are caused by several distinct families of viruses. In general, the term “viral hemorrhagic fever” is used to describe a severe multisystem syndrome (multisystem in that multiple organ systems in the body are affected).
What causes viral hemorrhagic fever?
Viral hemorrhagic fevers are spread by contact with infected animals or insects. The viruses that cause viral hemorrhagic fevers live in a variety of animal and insect hosts. Most commonly the hosts include mosquitoes, ticks, rodents or bats. Some viral hemorrhagic fevers can also be spread from person to person.
How is VHF spread?
Some types of VHF viruses – including Ebola, Marburg and Lassa – can be spread from person to person. They are spread through close contact with infected people or their body fluids. People can also be infected through contact with contaminated objects like needles or syringes.
Can you survive hemorrhagic fever?
Viral hemorrhagic fevers are illnesses caused by several groups of viruses. They can be mild or life-threatening. Many have no known cure. These viruses live in animals, often in rodents.
Is dengue a VHF?
The family Flaviviridae (order Amarillovirales) includes dengue, yellow fever, and two viruses in the tick-borne encephalitis group that cause VHF: Omsk hemorrhagic fever virus and Kyasanur Forest disease virus.
Is viral hemorrhagic fever airborne?
Yes. Many hemorrhagic fever viruses are considered possible bioterrorism agents because they are highly infectious, can be aerosolized (made airborne), and would cause serious illness in the target population.
What causes virus in the blood?
Viruses must invade a living cell to reproduce, and they can’t live for long without a host. Some viruses enter the bloodstream directly through the bite of an infected insect or animal, such as Zika virus, which can be spread by a bite from an infected mosquito.
What is the meaning of hemorrhagic fever?
Viral hemorrhagic fever: A syndrome caused by infection with one of a number of viruses that can cause increased permeability of the blood vessels resulting in bleeding into the skin, internally, or from the mouth or other orifices. The bleeding is usually not life-threatening.
How do you transmit Ebola?
Ebola is spread by direct contact with blood or other body fluids (such as: vomit, diarrhea, urine, breast milk, sweat, semen) of an infected person who has symptoms of Ebola or who has recently died from Ebola.
Where is Marburg virus found?
Aug 10, 2021
Previous outbreaks of Marburg virus disease, which is spread through contact with the body fluids of infected people or animals, have occurred mainly in eastern and southern Africa, according to The Guardian.
How do viruses cause human disease?
Viruses are like hijackers. They invade living, normal cells and use those cells to multiply and produce other viruses like themselves. This can kill, damage, or change the cells and make you sick. Different viruses attack certain cells in your body such as your liver, respiratory system, or blood.