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Kitum Cave
Kitum Cave is located in Mount Elgon National Park, Kenya. In the 1980s, two European visitors contracted Marburg virus disease there. It is one of five named “elephant caves” of Mount Elgon where animals, including elephants, “mine” the rock for its sodium-rich salts. Description Kitum Cave is a non-solutional cave developed in pyroclastic (volcanic) rocks (not, as some have presumed, a lava tube). It extends about into the side of Mount Elgon near the Kenyan border with Uganda. The walls are rich in salt, and animals such as elephants have gone deep into the cave for centuries in search of salt. The elephants use their tusks to break off pieces of the cave wall that they then chew and swallow, leaving the walls scratched and furrowed; their actions have likely enlarged the cave over time. When the cave was first discovered, it was thought that ancient Egyptians had made the marks on the cave walls as they attempted to mine with picks for precious metals or gemstones. O ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mount Elgon National Park
Mount Elgon National Park is a national park northeast of Lake Victoria. The park covers an area of and is bisected by the border of Kenya and Uganda. The Ugandan part of the park covers while the Kenyan part covers . The Kenyan part of the park was gazetted in 1968, the Ugandan part in 1992. Mount Elgon The park is named after Mount Elgon, an extinct shield volcano on the border of Uganda and Kenya. Location Mount Elgon National Park is uniquely split down the middle by the Kenyan-Ugandan border. Mount Elgon is an important water catchment for the Nzoia River, which flows to Lake Victoria, and for the Turkwel River (known as the Suam River in Uganda), which flows into Lake Turkana. Climate The climate is moist to moderate dry. Annual rainfall is over . The dry seasons run from June to August and from December to March, although it can rain at any time. Vegetation Elgon's slopes support a rich variety of vegetation ranging from montane forest to high open moorlan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fruit-eating Bat
Megabats constitute the family Pteropodidae of the order Chiroptera ( bats). They are also called fruit bats, Old World fruit bats, or—especially the genera ''Acerodon'' and ''Pteropus''— flying foxes. They are the only member of the superfamily Pteropodoidea, which is one of two superfamilies in the suborder Yinpterochiroptera. Internal divisions of Pteropodidae have varied since subfamilies were first proposed in 1917. From three subfamilies in the 1917 classification, six are now recognized, along with various tribes. As of 2018, 197 species of megabat had been described. The leading theory of the evolution of megabats has been determined primarily by genetic data, as the fossil record for this family is the most fragmented of all bats. They likely evolved in Australasia, with the common ancestor of all living pteropodids existing approximately 31 million years ago. Many of their lineages probably originated in Melanesia, then dispersed over time to mainland Asia, t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Guano
Guano (Spanish from qu, wanu) is the accumulated excrement of seabirds or bats. As a manure, guano is a highly effective fertilizer due to the high content of nitrogen, phosphate, and potassium, all key nutrients essential for plant growth. Guano was also, to a lesser extent, sought for the production of gunpowder and other explosive materials. The 19th-century seabird guano trade played a pivotal role in the development of modern input-intensive farming. The demand for guano spurred the human colonization of remote bird islands in many parts of the world. Unsustainable seabird guano mining processes can result in permanent habitat destruction and the loss of millions of seabirds. Bat guano is found in caves throughout the world. Many cave ecosystems are wholly dependent on bats to provide nutrients via their guano which supports bacteria, fungi, invertebrates, and vertebrates. The loss of bats from a cave can result in the extinction of species that rely on their guano. U ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Egyptian Fruit Bat
The Egyptian fruit bat or Egyptian rousette (''Rousettus aegyptiacus'') is a species of megabat that is found in Africa, the Middle East, the Mediterranean, and the Indian subcontinent. It is one of three '' Rousettus'' species with an African-Malagasy range, though the only species of its genus found on continental Africa. The common ancestor of the three species colonized the region in the late Pliocene or early Pleistocene. The species is traditionally divided into six subspecies. It is considered a medium-sized megabat, with adults weighing and possessing wingspans of approximately . Individuals are dark brown or grayish brown, with their undersides paler than their backs. The Egyptian fruit bat is a highly social species, usually living in colonies with thousands of other bats. It, along with other members of the genus ''Rousettus'', are some of the only fruit bats to use echolocation, though a more primitive version than used by bats in other families. It has also develop ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gabon
Gabon (; ; snq, Ngabu), officially the Gabonese Republic (french: République gabonaise), is a country on the west coast of Central Africa. Located on the equator, it is bordered by Equatorial Guinea to the northwest, Cameroon to the north, the Republic of the Congo on the east and south, and the Gulf of Guinea to the west. It has an area of nearly and its population is estimated at million people. There are coastal plains, mountains (the Cristal Mountains and the Chaillu Massif in the centre), and a savanna in the east. Since its independence from France in 1960, the sovereign state of Gabon has had three presidents. In the 1990s, it introduced a multi-party system and a democratic constitution that aimed for a more transparent electoral process and reformed some governmental institutions. With petroleum and foreign private investment, it has the fourth highest HDI in the region (after Mauritius, Seychelles and South Africa) and the fifth highest GDP per capita ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Hot Zone
''The Hot Zone: A Terrifying True Story'' is a best-selling 1994 nonfiction thriller by Richard Preston about the origins and incidents involving viral hemorrhagic fevers, particularly ebolaviruses and marburgviruses. The basis of the book was Preston's 1992 '' New Yorker'' article "Crisis in the Hot Zone". The filoviruses—including Ebola virus, Sudan virus, Marburg virus, and Ravn virus—are Biosafety Level 4 agents, extremely dangerous to humans because they are very infectious, have a high fatality rate, and most have no known prophylactic measures, treatments, or cures. Along with describing the history of the devastation caused by two of these Central African diseases, Ebola virus disease and Marburg virus disease, Preston described a 1989 incident in which a relative of Ebola virus, Reston virus, was discovered at a primate quarantine facility in Reston, Virginia, less than 15 miles (24 km) away from Washington, D.C. Synopsis The book is in four sec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Richard Preston
Richard Preston (born August 5, 1954) is a writer for ''The New Yorker'' and bestselling author who has written books about infectious disease, bioterrorism, redwoods and other subjects, as well as fiction. Biography Preston was born in Cambridge, Massachusetts. He graduated Wellesley High School in Massachusetts in 1972 and attended Pomona College in Claremont, California. He earned a Ph.D. in English from Princeton University in 1983. His 1992 ''New Yorker'' article "Crisis in the Hot Zone" was expanded into his breakout book, ''The Hot Zone'' (1994). It is classified as a "non-fiction thriller" about ebolaviruses. He learned of ebola through such contacts as U.S. Army researchers Drs. C.J. Peters and Nancy Jaax. His fascination began during a visit to Africa where he was an eyewitness to epidemics. The book served as the (very loose) basis of the Hollywood movie ''Outbreak'' (1995) about military machinations surrounding a fictional "Motaba virus". Preston's novel '' The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vector (epidemiology)
In epidemiology, a disease vector is any living agent that carries and transmits an infectious pathogen to another living organism; agents regarded as vectors are organisms, such as parasites or microbes. The first major discovery of a disease vector came from Ronald Ross in 1897, who discovered the malaria pathogen when he dissected a mosquito. Arthropods Arthropods form a major group of pathogen vectors with mosquitoes, flies, sand flies, lice, fleas, ticks, and mites transmitting a huge number of pathogens. Many such vectors are haematophagous, which feed on blood at some or all stages of their lives. When the insects feed on blood, the pathogen enters the blood stream of the host. This can happen in different ways. The '' Anopheles'' mosquito, a vector for malaria, filariasis, and various arthropod-borne-viruses ( arboviruses), inserts its delicate mouthpart under the skin and feeds on its host's blood. The parasites the mosquito carries are usually located in its sal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Centers For Disease Control And Prevention
The Centers for Disease Control and Prevention (CDC) is the national public health agency of the United States. It is a United States federal agency, under the Department of Health and Human Services, and is headquartered in Atlanta, Georgia. The agency's main goal is the protection of public health and safety through the control and prevention of disease, injury, and disability in the US and worldwide. The CDC focuses national attention on developing and applying disease control and prevention. It especially focuses its attention on infectious disease, food borne pathogens, environmental health, occupational safety and health, health promotion, injury prevention and educational activities designed to improve the health of United States citizens. The CDC also conducts research and provides information on non-infectious diseases, such as obesity and diabetes, and is a founding member of the International Association of National Public Health Institutes. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ravn Virus
Ravn virus (; RAVV) is a close relative of Marburg virus (MARV). RAVV causes Marburg virus disease in humans and nonhuman primates, a form of viral hemorrhagic fever. RAVV is a Select agent, World Health Organization Risk Group 4 Pathogen (requiring Biosafety Level 4-equivalent containment), National Institutes of Health/National Institute of Allergy and Infectious Diseases Category A Priority Pathogen, Centers for Disease Control and Prevention Category A Bioterrorism Agent, and listed as a Biological Agent for Export Control by the Australia Group. Use of term Ravn virus (today abbreviated RAVV, but then considered identical to Marburg virus) was first described in 1987 and is named after a 15-year old Danish boy who fell ill and died from it. Today, the virus is classified as one of two members of the species '' Marburg marburgvirus'', which is included into the genus ''Marburgvirus'', family ''Filoviridae'', order ''Mononegavirales''. The name Ravn virus is derived from '' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Insectivorous Bat
Microbats constitute the suborder Microchiroptera within the order Chiroptera ( bats). Bats have long been differentiated into Megachiroptera (megabats) and Microchiroptera, based on their size, the use of echolocation by the Microchiroptera and other features; molecular evidence suggests a somewhat different subdivision, as the microbats have been shown to be a paraphyletic group. Characteristics Microbats are long. Most microbats feed on insects, but some of the larger species hunt birds, lizards, frogs, smaller bats or even fish. Only three species of microbat feed on the blood of large mammals or birds ("vampire bats"); these bats live in South and Central America. Although most "Leaf-nose" microbats are fruit and nectar-eating, the name “leaf-nosed” isn't a designation meant to indicate the preferred diet among said variety. Three species follow the bloom of columnar cacti in northwest Mexico and the Southwest United States northward in the northern spring and then th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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