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Zika fever, also known as Zika virus disease or simply Zika, is an infectious disease caused by the Zika virus. [1] Most cases have no symptoms, but when present they are usually mild and can resemble dengue fever. [1] [4] Symptoms may include fever, red eyes, joint pain, headache, and a maculopapular rash.
Zika fever (also known as Zika virus disease) is an illness caused by Zika virus. [80] Around 80% of cases are estimated to be asymptomatic, though the accuracy of this figure is hindered by the wide variance in data quality, and figures from different outbreaks can vary significantly. [ 81 ]
In approximately one in five cases, Zika virus infections result in Zika fever, a minor illness that causes symptoms such as fever and a rash. [11] [12] Prior to the outbreak, Zika was considered a mild infection, as most infections are asymptomatic, making it difficult to determine precise estimates of the number of cases. [13]
Although dengue fever has a global incidence of 50–100 million cases, only several hundreds of thousands of these cases are life-threatening. The geographic prevalence of the disease can be examined by the spread of Aedes aegypti. [60] Over the last twenty years, there has been a geographic spread of the disease.
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Sandfly species transmit the disease leishmaniasis, by acting as vectors for protozoan Leishmania species, and tsetse flies transmit protozoan trypansomes (Trypanosoma brucei gambiense and Trypansoma brucei rhodesiense) which cause African Trypanosomiasis (sleeping sickness). Ticks and lice form another large group of invertebrate vectors.
TORCH syndrome is a cluster of symptoms caused by congenital infection with toxoplasmosis, rubella, cytomegalovirus, herpes simplex, and other organisms including syphilis, parvovirus, and Varicella zoster. [1] Zika virus is considered the most recent member of TORCH infections. [2]
Spread of the Zika virus [1] [2] [3]. This article primarily covers the chronology of the 2015–16 Zika virus epidemic.Flag icons denote the first announcements of confirmed cases by the respective nation-states, their first deaths (and other events such as their first reported cases of microcephaly and major public health announcements), and relevant sessions and announcements of the World ...