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Glossina
Tsetse ( , or ) (sometimes spelled tzetze; also known as tik-tik flies) are large, biting flies that inhabit much of tropical Africa. Tsetse flies include all the species in the genus ''Glossina'', which are placed in their own family, Glossinidae. The tsetse is an obligate parasite, which lives by feeding on the blood of vertebrate animals. Tsetse has been extensively studied because of their role in transmitting disease. They have pronounced economic and public health impacts in sub-Saharan Africa as the biological vectors of trypanosomes, causing human and animal trypanosomiasis. Tsetse can be distinguished from other large flies by two easily-observed features: primarily, tsetse fold their wings over their abdomens completely when they are resting (so that one wing rests directly on top of the other); Secondly, tsetse also have a long proboscis, extending directly forward, which is attached by a distinct bulb to the bottom of their heads. Fossilized tsetse has been re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tsetse Head-proboscis
Tsetse ( , or ) (sometimes spelled tzetze; also known as tik-tik flies) are large, biting flies that inhabit much of tropical Africa. Tsetse flies include all the species in the genus ''Glossina'', which are placed in their own family, Glossinidae. The tsetse is an obligate parasite, which lives by feeding on the blood of vertebrate animals. Tsetse has been extensively studied because of their role in transmitting disease. They have pronounced economic and public health impacts in sub-Saharan Africa as the Vector (epidemiology), biological vectors of trypanosomes, causing African trypanosomiasis, human and animal trypanosomiasis. Tsetse can be distinguished from other large flies by two easily-observed features: primarily, tsetse fold their wings over their abdomens completely when they are resting (so that one wing rests directly on top of the other); Secondly, tsetse also have a long proboscis, extending directly forward, which is attached by a distinct bulb to the bottom ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tsetse HatchetCell
Tsetse ( , or ) (sometimes spelled tzetze; also known as tik-tik flies) are large, biting flies that inhabit much of tropical Africa. Tsetse flies include all the species in the genus ''Glossina'', which are placed in their own family, Glossinidae. The tsetse is an obligate parasite, which lives by feeding on the blood of vertebrate animals. Tsetse has been extensively studied because of their role in transmitting disease. They have pronounced economic and public health impacts in sub-Saharan Africa as the biological vectors of trypanosomes, causing human and animal trypanosomiasis. Tsetse can be distinguished from other large flies by two easily-observed features: primarily, tsetse fold their wings over their abdomens completely when they are resting (so that one wing rests directly on top of the other); Secondly, tsetse also have a long proboscis, extending directly forward, which is attached by a distinct bulb to the bottom of their heads. Fossilized tsetse has been re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glossina Morsitans
''Glossina morsitans'' is a species of tsetse fly (genus ''Glossina)''. It is one of the major vector (epidemiology), vectors of ''Trypanosoma brucei rhodesiense'' in African savannas. Taxonomy ''Glossina morsitans'' is variously classified into the Glossina subg. Glossina, subgenus ''Glossina'' s.s. or as the name species of the Glossina morsitans group, ''morsitans'' species group. Three subspecies are traditionally recognized for ''G. morsitans'': # ''Glossina morsitans submorsitans, G. m. submorsitans'' # ''Glossina morsitans morsitans, G. m. morsitans'' # ''G. m. centralis'' ''G.m.s.'' is further subdivided by some authors into a Glossina morsitans submorsitans ugandensis, ''G. m. s. ugandensis''. Morphology File:Glossina morsitans morsitans-pregnant female.jpg, Pregnant female File:Glossina-morsitans-adult-tsetse-fly-2.jpg, Adult tsetse fly Egg About long. Larvae First instar long. Second instar long. Third instar long. Adult Adults are . ''G. morsitans'' is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
African Trypanosomiasis
African trypanosomiasis is an insect-borne parasitic infection of humans and other animals. Human African trypanosomiasis (HAT), also known as African sleeping sickness or simply sleeping sickness, is caused by the species ''Trypanosoma brucei''. Humans are infected by two types, ''Trypanosoma brucei gambiense'' (TbG) and ''Trypanosoma brucei rhodesiense'' (TbR). TbG causes over 92% of reported cases. Both are usually transmitted by the bite of an infected tsetse fly and are most common in rural areas. Initially, the first stage of the disease is characterized by fevers, headaches, itchiness, and joint pains, beginning one to three weeks after the bite. Weeks to months later, the second stage begins with confusion, poor coordination, numbness, and trouble sleeping. Diagnosis involves detecting the parasite in a blood smear or lymph node fluid. A lumbar puncture is often needed to tell the difference between first- and second-stage disease. Prevention of severe disease in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Animal Trypanosomiasis
Animal trypanosomiasis, also known as nagana and nagana pest, or sleeping sickness, is a disease of non-human vertebrates. The disease is caused by trypanosoma, trypanosomes of several species in the genus ''Trypanosoma'' such as ''Trypanosoma brucei, T. brucei'' (which also infects humans to cause African Sleeping Sickness), and ''Trypanosoma vivax, T. vivax'' which causes nagana in livestock mainly in West Africa, although it has also spread to South America. The trypanosomes infect the blood of the vertebrate host, causing fever, weakness, and lethargy, which lead to weight loss and anemia. In some animals, the disease is fatal if not treated. The trypanosomes are transmitted by tsetse fly, tsetse flies. An interesting feature is the remarkable tolerance to nagana pathology shown by some breeds of cattle, notably the N'Dama – a West African ''Bos taurus'' breed. This contrasts with the susceptibility shown by East African ''Bos indicus, B. indicus'' cattle such as the zebu. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Biting Flies
Many species of arthropods (insects, arachnids, millipedes and centipedes) can bite or sting human beings. These bites and stings generally occur as a defense mechanism or during normal arthropod feeding. While most cases cause self-limited irritation, medically relevant complications include envenomation, allergic reactions, and transmission of vector-borne diseases. Signs and symptoms Most arthropod bites and stings cause self-limited redness, itchiness and/or pain around the site. Less commonly (around 10% of Hymenoptera sting reactions), a large local reaction occurs when the area of swelling is greater than . Rarely (1-3% of Hymenoptera sting reactions), systemic reactions can affect multiple organs and pose a medical emergency, as in the case of anaphylactic shock. Defensive and predatory bites and stings Many arthropods bite or sting in order to immobilize their prey or deter potential predators as a defense mechanism. Stings containing venom are more likely to be pai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sotho Languages
Sotho may refer to: *Sotho people (or ''Basotho''), an African ethnic group principally resident in South Africa, Lesotho and southern Botswana *Sotho language (''Sesotho'' or ''Southern Sotho''), a Bantu language spoken in southern Africa, an official language of both South Africa and Lesotho *Northern Sotho language (''Sesotho sa Leboa''), a group of related Bantu dialects classed together as an official language of South Africa *Sotho–Tswana languages, the S.30 language group, a linguistic classification which groups together the related languages Sotho, Northern Sotho, Tswana, and Lozi * Sotho-Tswana peoples, a group of southern African ethnic groups with a common history, speakers of languages in the Sotho group *Lesotho Lesotho, formally the Kingdom of Lesotho and formerly known as Basutoland, is a landlocked country in Southern Africa. Entirely surrounded by South Africa, it is the largest of only three sovereign enclave and exclave, enclaves in the world, t ..., a cou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Recent
The Holocene () is the current geological epoch, beginning approximately 11,700 years ago. It follows the Last Glacial Period, which concluded with the Holocene glacial retreat. The Holocene and the preceding Pleistocene together form the Quaternary period. The Holocene is an interglacial period within the ongoing glacial cycles of the Quaternary, and is equivalent to Marine Isotope Stage 1. The Holocene correlates with the last maximum axial tilt towards the Sun of the Earth's obliquity. The Holocene corresponds with the rapid proliferation, growth, and impacts of the human species worldwide, including all of its written history, technological revolutions, development of major civilizations, and overall significant transition towards urban living in the present. The human impact on modern-era Earth and its ecosystems may be considered of global significance for the future evolution of living species, including approximately synchronous lithospheric evidence, or more r ... [...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] |
Christian Rudolph Wilhelm Wiedemann
Christian Rudolph Wilhelm Wiedemann (7 December 1770 – 31 December 1840) was a German physician, historian, naturalist and entomologist. He is best known for his studies of world Diptera, but he also studied Hymenoptera and Coleoptera, although far less expertly. Biography Wiedemann’s father, Conrad Eberhard Wiedemann (1722–1804) was an art dealer and his mother, Dorothea Frederike (née Raspe) (1741–1804) was the daughter of an accountant in the Royal Mining Service and also interested in the arts. After his education in Brunswick, he matriculated in 1790 to the Faculty of Medicine at the University of Jena where he was a contemporary of the poet Friedrich von Hardenberg. While attending university, Wiedemann, was one of the many pupils of Johann Friedrich Blumenbach, and travelled to Saxony and Bohemia. He obtained his doctoral degree in 1792 with a thesis entitled ''Dissertatio inauguralis sistens vitia gennus humanum debilitantia''. He then went to Englan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
