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Yellow fever is caused by yellow fever virus (YFV), an enveloped RNA virus 40–50 nm in width, the type species and namesake of the family Flaviviridae. [10] It was the first illness shown to be transmissible by filtered human serum and transmitted by mosquitoes, by American doctor Walter Reed around 1900. [32]
A form of the disease, termed "jungle yellow fever", was shown to be carried by Red Howler monkeys (Alouatta seniculus insulanus Elliot) that provided a continuous reservoir for the disease, which was then spread by the Haemagogus s. spegazzini mosquito which normally inhabits rainforest regions, both at ground level and in the treetops.
A wide variety of natural hosts are used by different members of the Flaviviridae, including fish, mammals including humans and various invertebrates, such as those specific to mollusks and crustaceans. [6] The genomes of these flaviviruses show close synteny with that of the flavivirus type species, yellow fever virus. [7]
Knowing the symptoms of yellow fever also can’t hurt. The telltale sign is yellow eyes and skin, Yancey says, which is the result of the virus attacking the liver. The signs may look different ...
Yellow fever is a relative of the dengue and Zika viruses but is far deadlier. Most people don't even know they are infected, but 15 percent can develop serious illness and as many as 60 percent ...
Flavivirus, renamed Orthoflavivirus in 2023, [3] is a genus of positive-strand RNA viruses in the family Flaviviridae.The genus includes the West Nile virus, dengue virus, tick-borne encephalitis virus, yellow fever virus, Zika virus and several other viruses which may cause encephalitis, [4] as well as insect-specific flaviviruses (ISFs) such as cell fusing agent virus (CFAV), Palm Creek ...
For example, the human body louse transmits the bacterium Rickettsia prowazekii which causes epidemic typhus. Although invertebrate-transmitted diseases pose a particular threat on the continents of Africa, Asia and South America, there is one way of controlling invertebrate-borne diseases, which is by controlling the invertebrate vector.
The Faget sign is named after Louisiana physician Jean Charles Faget, who studied yellow fever in Louisiana. [1] [2] Faget sign is often seen in: Yellow fever; Typhoid fever; Brain abscess; Tularaemia; Brucellosis; Colorado tick fever; Some pneumonias - Legionella pneumonia and Mycoplasma pneumonia; Drug fever (e.g. beta-blockers, [3] known as ...