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Aedes Africanus
''Aedes africanus'' is a species of mosquito that is found on the continent of Africa with the exclusion of Madagascar. Walter Reed Biosystematics Unit, Systematic Catalog of Culicidae, ''Aedes aegypti'' and ''Aedes africanus'' are the two main yellow fever vector species in Zambia. ''Aedes africanus'' is mainly found in tropical forests not near wetlands. Identification This mosquito has distinct white and black stripes along its body which help differentiate the genus from others in this family. Females of this species are ectoparasites and can most often be found on mammals living in the tropical forests of Africa. The ''africanus'' species can be distinguished from other mosquitoes in the genus ''Aedes'' by having white scales on the maxillary palpi, scutum with a patch of large white scales, and 3 large white patches on the mid-femur. Life cycle This species lays its eggs in holes in trees, cut bamboo, bamboo stumps, and tree forks. In laboratory settings, it was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frederick Vincent Theobald
Frederick Vincent Theobald FES (15 May 1868 – 6 March 1930) was an English entomologist and "distinguished authority on mosquitoes". During his career, he was responsible for the economic zoology section of the Natural History Museum, London, vice-principal of the South-Eastern Agricultural College at Wye, Kent, Professor of Agricultural Zoology at London University, and advisory entomologist to the Board of Agriculture for the South-Eastern district of England. He wrote a five volume monograph and sixty scientific papers on mosquitoes. He was recognised for his work in entomology, tropical medicine, and sanitation; awards for his work include the Imperial Ottoman Order of Osmanieh, the Mary Kingsley Medal, and the Victoria Medal of Honour, as well as honorary fellowships of learned societies. Life and career Frederick Vincent Theobald was born on 15 May 1868 in Tooting (then in Surrey), the son of solicitor John P. Theobald and Anne Theobald (née Mat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aedes Aegypti Bloodfeeding CDC Gathany
''Aedes'' (also known as the tiger mosquito) is a genus of mosquitoes originally found in tropical and subtropical zones, but now found on all continents except Antarctica. Some species have been spread by human activity: ''Aedes albopictus'', a particularly invasive species, was spread to the Americas, including the United States, in the 1980s, by the used-tire trade. It was first described and named by German entomologist Johann Wilhelm Meigen in 1818; the generic name comes from Ancient Greek (), meaning 'unpleasant' or 'odious'. The type species for ''Aedes'' is '' Aedes cinereus''.. Systematics and phylogeny The genus was named by Johann Wilhelm Meigen in 1818. The generic name comes from the Ancient Greek , , meaning 'unpleasant' or 'odious'. As historically defined, the genus contains more than 950 species (see the list of ''Aedes'' species). The genus has been divided into several subgenera (''Aedes'', '' Diceromyia'', ''Finlaya'', ''Stegomyia'', etc.), most of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Emerging Infectious Diseases
''Emerging Infectious Diseases'' is a monthly open-access peer-reviewed medical journal published by the Centers for Disease Control and Prevention. The journal is in the public domain and covers global instances of new and reemerging infectious diseases, putting greater emphasis on disease emergence, prevention, control, and elimination. According to the ''Journal Citation Reports'', the journal has a 2023 impact factor of 7.2. Abstracting and indexing The journal is abstracted and indexed in Index Medicus/MEDLINE/PubMed, Science Citation Index Expanded, and Scopus Scopus is a scientific abstract and citation database, launched by the academic publisher Elsevier as a competitor to older Web of Science in 2004. The ensuing competition between the two databases has been characterized as "intense" and is c .... References External links * {{Authority control Open access journals Microbiology journals Monthly journals Academic journals established in 1995 English-la ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zika Fever
Zika fever, also known as Zika virus disease or simply Zika, is an infectious disease caused by the Zika virus. Most cases have no symptoms, but when present they are usually mild and can resemble dengue fever. Symptoms may include fever, conjunctivitis, red eyes, arthralgia, joint pain, headache, and a maculopapular rash. Symptoms generally last less than seven days. It has not caused any reported deaths during the initial infection. Vertically transmitted disease, Mother-to-child transmission during pregnancy can cause microcephaly and other brain malformations in some babies. Infections in adults have been linked to Guillain–Barré syndrome (GBS). Zika fever is mainly spread via the bite of mosquitoes of the ''Aedes'' type. It can also be sexually transmitted infection, sexually transmitted and potentially spread by blood transfusions. Infections in pregnant women can spread to the baby. Diagnosis is by testing the blood, urine, or saliva for the presence of the virus's RNA ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zika Virus
Zika virus (ZIKV; pronounced or ) is a member of the virus family ''Flaviviridae''. It is spread by daytime-active ''Aedes'' mosquitoes, such as '' A. aegypti'' and '' A. albopictus''. Its name comes from the Ziika Forest of Uganda, where the virus was first isolated in 1947. Zika virus shares a genus with the dengue, yellow fever, Japanese encephalitis, and West Nile viruses. Since the 1950s, it has been known to occur within a narrow equatorial belt from Africa to Asia. From 2007 to , the virus spread eastward, across the Pacific Ocean to the Americas, leading to the 2015–2016 Zika virus epidemic. The infection, known as Zika fever or Zika virus disease, often causes no or only mild symptoms, similar to a very mild form of dengue fever. While there is no specific treatment, paracetamol (acetaminophen) and rest may help with the symptoms. Zika can spread from a pregnant woman to her baby. This can result in microcephaly, severe brain malformations, and other b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rift Valley Fever Virus
In geology, a rift is a linear zone where the lithosphere is being pulled apart and is an example of extensional tectonics. Typical rift features are a central linear downfaulted depression, called a graben, or more commonly a half-graben with normal faulting and rift-flank uplifts mainly on one side. Where rifts remain above sea level they form a rift valley, which may be filled by water forming a rift lake. The axis of the rift area may contain volcanic rocks, and active volcanism is a part of many, but not all, active rift systems. Major rifts occur along the central axis of most mid-ocean ridges, where new oceanic crust and lithosphere is created along a divergent boundary between two tectonic plates. ''Failed rifts'' are the result of continental rifting that failed to continue to the point of break-up. Typically the transition from rifting to spreading develops at a triple junction where three converging rifts meet over a hotspot. Two of these evolve to the poin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
West Nile Virus
West Nile virus (WNV) is a single-stranded RNA virus that causes West Nile fever. It is a member of the family ''Flaviviridae'', from the genus ''Flavivirus'', which also contains the Zika virus, dengue virus, and yellow fever virus. The virus is primarily transmitted by mosquitoes, mostly species of ''Culex''. The primary host (biology), hosts of WNV are birds, so that the virus remains within a "bird–mosquito–bird" Transmission (medicine), transmission cycle. The virus is genetically related to the Japanese encephalitis family of viruses. Humans and horses both exhibit disease symptoms from the virus, and symptoms rarely occur in other animals. West Nile virus was not named directly after the Nile River, but rather, after the West_Nile_sub-region, West Nile district of Uganda where the virus was first isolated in 1937. Structure Like most other flaviviruses, WNV is an Viral envelope, enveloped virus with icosahedral symmetry. Electron microscope studies reveal a 45–5 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dengue Virus
Dengue virus (DENV) is the cause of dengue fever. It is a mosquito-borne, single positive-stranded RNA virus of the family ''Flaviviridae''; genus '' Flavivirus''. Four serotypes of the virus have been found, and a reported fifth has yet to be confirmed,Dwivedi, V. D., Tripathi, I. P., Tripathi, R. C., Bharadwaj, S., & Mishra, S. K. (2017). Genomics, proteomics and evolution of ''Dengue virus''. Briefings in functional genomics.16(4): 217–227, https://doi.org/10.1093/bfgp/elw040 all of which can cause the full spectrum of disease. Nevertheless, the mainstream scientific community's understanding of dengue virus may be simplistic as, rather than distinct antigenic groups, a continuum appears to exist. This same study identified 47 strains of ''dengue virus''. Additionally, coinfection with and lack of rapid tests for Zika virus and chikungunya complicate matters in real-world infections. ''Dengue virus'' has increased dramatically within the last 20 years, becoming one of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Culex Mosquito Life Cycle En
''Culex'' or typical mosquitoes are a genus of mosquitoes, several species of which serve as Vector (epidemiology), vectors of one or more important diseases of birds, humans, and other animals. The diseases they vector include arbovirus infections such as West Nile virus, Japanese encephalitis, or St. Louis encephalitis, but also filariasis and avian malaria. They occur worldwide except for the extreme northern parts of the temperate zone, and are the most common form of mosquito encountered in some major U.S. cities, such as Los Angeles. Etymology In naming this genus, Carl Linnaeus used the nonspecific Latin term for a midge or gnat: '. Description Depending on the species, the adult ''Culex'' mosquito may measure from . The adult morphology is typical of flies in the suborder Nematocera with the Insect morphology, head, Insect morphology, thorax, and Insect morphology, abdomen clearly defined and the two Insect morphology, forewings held horizontally over the abdomen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Africa
Africa is the world's second-largest and second-most populous continent after Asia. At about 30.3 million km2 (11.7 million square miles) including adjacent islands, it covers 20% of Earth's land area and 6% of its total surface area.Sayre, April Pulley (1999), ''Africa'', Twenty-First Century Books. . With nearly billion people as of , it accounts for about of the world's human population. Demographics of Africa, Africa's population is the youngest among all the continents; the median age in 2012 was 19.7, when the worldwide median age was 30.4. Based on 2024 projections, Africa's population will exceed 3.8 billion people by 2100. Africa is the least wealthy inhabited continent per capita and second-least wealthy by total wealth, ahead of Oceania. Scholars have attributed this to different factors including Geography of Africa, geography, Climate of Africa, climate, corruption, Scramble for Africa, colonialism, the Cold War, and neocolonialism. Despite this lo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wetland
A wetland is a distinct semi-aquatic ecosystem whose groundcovers are flooded or saturated in water, either permanently, for years or decades, or only seasonally. Flooding results in oxygen-poor ( anoxic) processes taking place, especially in the soils. Wetlands form a transitional zone between waterbodies and dry lands, and are different from other terrestrial or aquatic ecosystems due to their vegetation's roots having adapted to oxygen-poor waterlogged soils. They are considered among the most biologically diverse of all ecosystems, serving as habitats to a wide range of aquatic and semi-aquatic plants and animals, with often improved water quality due to plant removal of excess nutrients such as nitrates and phosphorus. Wetlands exist on every continent, except Antarctica. The water in wetlands is either freshwater, brackish or saltwater. The main types of wetland are defined based on the dominant plants and the source of the water. For example, ''marshes'' ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tropical And Subtropical Moist Broadleaf Forests
Tropical and subtropical moist broadleaf forests (TSMF), also known as tropical moist forest, is a subtropical and tropical forest habitat type defined by the World Wide Fund for Nature (WWF). Description TSMF is generally found in large, discontinuous patches centered on the equatorial belt and between the Tropic of Cancer and Tropic of Capricorn. TSMF are characterized by low variability in annual temperature and high levels of rainfall of more than annually. Forest composition is dominated by evergreen and semi-deciduous tree species. These forests are home to more species than any other terrestrial ecosystem on Earth: Half of the world's species may live in these forests, where a square kilometer may be home to more than 1,000 tree species. These forests are found around the world, particularly in the Indo-Malayan Archipelago, the Amazon Basin, and the African Congo Basin. The perpetually warm, wet climate makes these environments more productive than any ot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
