Is a viral disease that is transmitted to humans through the bite of infected mosquitoes. Illness ranges in severity from an influenza-like syndrome to severe hepatitis and hemorrhagic fever. Yellow fever virus (YFV) is maintained in nature by mosquitoborne transmission between nonhuman primates.
A tropical epidemic disease caused by mosquito-borne viral infection.
A viral disease transmitted to humans by the bite of a specific mosquito, the Aedes aegypti.
An infectious disease, occurring especially in Africa and South America, caused by an arbovirus carried by the mosquito Aedes aegypti. It affects the liver and causes jaundice. There is no known cure and it can be fatal, but vaccination can prevent it.
Vims-caused disease, transmitted by mosquitoes, chiefly female Aedes aegypti mosquitoes, found in tropical Africa and northern South America. Symptoms include fever, headache, pains in the back and limbs, reduced urine output, jaundice, and degeneration of liver and kidney tissue. There is no specific treatment, but the disease can be prevented by vaccination (which is advised for all who travel to areas where yellow fever is endemic); recovery from one attack usually confers subsequent immunity.
A viral infection that varies in severity and occurs in two forms. Urban yellow fever is acquired when a person is bitten by a certain species of mosquito that has become infected by biting an infected person. Jungle yellow fever, also called sylvatic yellow fever, is transmitted by mosquitoes that have fed on infected wild primates. The infection is found mostly in central Africa and in tropical areas of South America. The illness can be very mild with symptoms limited to fever and headache within 48 hours of infection, or it can be severe or fatal. Although the infection occurs rarely in travelers, visitors must meet requirements for vaccination against yellow fever before entering countries where it is endemic, such as India.
An infectious disease, caused by an arbovirus, occurring in tropical Africa and the northern regions of South America. It is transmitted by mosquitoes, principally Aedes aegypti. The virus causes degeneration of the tissues of the liver and kidneys. Symptoms, depending on severity of infection, include chills, headache, pains in the back and limbs, fever, vomiting, constipation, a reduced flow of urine (which contains high levels of albumin), and jaundice. Yellow fever often proves fatal, but recovery from a first attack confers subsequent immunity. The disease can be prevented by vaccination.
An acute arbovirus infection transmitted from animals to humans by various species of forest mosquito (jungle/sylvan yellow fever), and from human to human by Aedes aegypti (urban yellow fever). It is endemic in much of tropical Africa and Central and South America. In the urban cycle, humans constitute the reservoir of infection, and in the jungle/sylvan variety, mammals especially subhuman primates are involved in transmission. Historically, yellow fever was enormously important, causing devastating epidemics; it also carried a high mortality rate in travellers and explorers. Differentiation from other infections associated with jaundice was often impossible.
One of two forms of an acute, infectious disease caused by a flavivirus and transmitted by the Aedes mosquito. It is endemic in Western Africa, Brazil, and the Amazon region of South America but is no longer present in the U.S.
Yellow fever is an infectious disease caused by a virus. This disease is primarily transmitted through mosquito bites and is prevalent in Central and South America, as well as Central Africa. Symptoms of yellow fever include elevated body temperature, jaundice (characterized by yellowing of the eyes and skin), and dark-colored vomit, indicating internal bleeding. It is important to note that yellow fever can be a life-threatening condition. Prompt medical attention and preventive measures, such as vaccination and mosquito control, are crucial for combating the spread of this disease and mitigating its impact on affected individuals and communities.
Yellow fever is a viral infection with a relatively brief course and varying degrees of severity, primarily spread by mosquitoes. In severe instances, individuals may develop jaundice, causing their skin to turn yellow, which is the origin of the name “yellow fever.”
In forested regions, this infection can be transmitted from monkeys to humans via various mosquito species. In urban settings, it can be spread from person to person by Aedes Aegypti mosquitoes.
Presently, yellow fever is prevalent in Central America, certain regions of South America, and a vast area in Africa. The elimination of disease-carrying mosquitoes from populated areas has significantly decreased the occurrence of this illness.
Yellow fever typically presents with a sudden onset of fever and headaches, often accompanied by feelings of nausea and nosebleeds. These symptoms typically appear three to six days after infection. Interestingly, despite the high fever, individuals with yellow fever often exhibit a slow heart rate. Fortunately, in many instances, those afflicted with the illness recover rapidly.
In severe instances, the fever escalates, accompanied by intense headaches and significant discomfort in the neck, back, and legs. There is a rapid deterioration in the condition of the liver and kidneys, resulting in jaundice and kidney failure. This can progress to severe restlessness and confusion, ultimately culminating in a coma and, tragically, death.
Vaccination provides enduring immunity and is a crucial step for individuals planning to travel to regions with the risk of infection. A single vaccine shot ensures protection for a minimum of 10 years. Adverse reactions to the vaccine are infrequent and generally mild, although it’s important to note that children under the age of one should not receive the vaccination.
During yellow fever outbreaks, a diagnosis can be established based on the symptoms exhibited by the affected individual. This diagnosis can be further validated through blood tests that either isolate the responsible virus or detect antibodies (proteins produced by the immune system) specific to the virus.
There is no effective medication for combating the yellow fever virus. Instead, treatment focuses on sustaining the proper blood volume, often requiring the administration of fluid transfusions.
Most patients typically experience recovery within approximately three days, and in cases of mild to moderate severity, there are minimal complications. Relapses are uncommon, and a single bout of the illness provides lifelong immunity. Nevertheless, the disease can be severe in 20 to 50 percent of cases and, in certain situations, may lead to fatalities.
An acute infectious disease that predominantly affects tropical and subtropical regions, caused by a virus transmitted by a specific type of mosquito. The incubation period can range from a few hours to several days, and the illness typically begins with symptoms like chills, headache, and muscle pain. Body temperature rises rapidly, reaching as high as 105°F, accompanied by vomiting. Constipation is common, and urine may be scanty and contain albumin. After an initial remission, in severe cases, the fever may return to its previous height, accompanied by jaundice, and vomit may become dark due to the presence of blood. Yellow fever can often be fatal and poses a significant concern in regions like India, which, despite hosting the mosquito responsible for transmitting the disease, has managed to remain uninfected by the virus. In today’s age of rapid travel, individuals flying from or transiting through yellow fever-endemic areas are generally required to receive a vaccination against this highly virulent disease before being allowed to enter non-yellow fever regions.