African trypanosomiasis, also known as African sleeping sickness or simply sleeping sickness, is an insect-borne parasitic infection of humans and other animals. It 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.
Tsetse 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 a pronounced economic impact in sub-Saharan Africa as the biological vectors of trypanosomes, causing human and animal trypanosomiasis.
Trypanosomiasis or trypanosomosis is the name of several diseases in vertebrates caused by parasitic protozoan trypanosomes of the genus Trypanosoma. In humans this includes African trypanosomiasis and Chagas disease. A number of other diseases occur in other animals.
Trypanosoma is a genus of kinetoplastids, a monophyletic group of unicellular parasitic flagellate protozoa. Trypanosoma is part of the phylum Sarcomastigophora. The name is derived from the Greek trypano- (borer) and soma (body) because of their corkscrew-like motion. Most trypanosomes are heteroxenous and most are transmitted via a vector. The majority of species are transmitted by blood-feeding invertebrates, but there are different mechanisms among the varying species. Trypanosoma equiperdum is spread between horses and other equine species by sexual contact. They are generally found in the intestine of their invertebrate host, but normally occupy the bloodstream or an intracellular environment in the vertebrate host.
CGIAR is a global partnership that unites international organizations engaged in research about food security. CGIAR research aims to reduce rural poverty, increase food security, improve human health and nutrition, and sustainable management of natural resources.
Eflornithine, sold under the brand name Vaniqa among others, is a medication used to treat African trypanosomiasis and excessive hair growth on the face in women. Specifically it is used for the 2nd stage of sleeping sickness caused by T. b. gambiense and may be used with nifurtimox. It is taken intravenously or topically. It has also been given orally on at least some rare occasions for the treatment of African trypanosomiasis.
Trypanosoma brucei is a species of parasitic kinetoplastid belonging to the genus Trypanosoma that is present in sub-Saharan Africa. Unlike other protozoan parasites that normally infect blood and tissue cells, it is exclusively extracellular and inhabits the blood plasma and body fluids. It causes deadly vector-borne diseases: African trypanosomiasis or sleeping sickness in humans, and animal trypanosomiasis or nagana in cattle and horses. It is a species complex grouped into three subspecies: T. b. brucei, T. b. gambiense and T. b. rhodesiense. The first is a parasite of non-human mammals and causes nagana, while the latter two are zoonotic infecting both humans and animals and cause African trypanosomiasis.
Animal trypanosomiasis, also known as nagana and nagana pest, or sleeping sickness, is a disease of vertebrates. The disease is caused by trypanosomes of several species in the genus Trypanosoma such as T. brucei. T. vivax causes nagana mainly in West Africa, although it has 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 unless treated. The trypanosomes are transmitted by tsetse flies.
Alan Hutchinson Fairlamb, CBE, FRSE, FLS, FMedSci, FRSB is a Wellcome Trust Principal Research Fellow and Professor of Biochemistry in the Division of Biological Chemistry and Drug Discovery at the School of Life Sciences, University of Dundee, Scotland. From 2006-2011 he was a member of the Scientific and Technical Advisory Committee of the Special Programme for Research and Training in Tropical Diseases (TDR) -- an independent global programme of scientific collaboration co-sponsored by UNICEF, UNDP, the World Bank and WHO. Currently he is a member of the governing board of the Tres Cantos Open Lab Foundation, whose aim is to accelerate the discovery and development of medicines to tackle diseases of the developing world in an open collaborative manner.
Professor Keith Gull is a Wellcome Trust Principal Research Fellow and Professor of Molecular microbiology at the Sir William Dunn School of Pathology, University of Oxford. He was the principal of St Edmund Hall, Oxford from 1 October 2009 to 30 September 2018, succeeding Michael Mingos.
The Taihu pig is a domestic breed of pig from the narrow region of mild sub-tropical climate around the Lake Tai region in the lower Yangtze River Valley of China. The breed is a large one, black in colour with a heavily wrinkled face. It has a large head with a broad forehead and large folded ears. The breed has a number of divisions, classified by some authors as strains and by others as separate breeds.
Wendy Gibson is Professor of Protozoology at University of Bristol, specialising in trypanosomes and molecular parasitology.
Brian Derek Perry, OBE is a British veterinary surgeon and epidemiologist renowned for the integration of veterinary epidemiology and agricultural economics, as a tool for disease control policy and strategy development, and specialised in international agricultural development. He is an Honorary Professor at the University of Edinburgh, a Visiting Professor at the Nuffield Department of Clinical Medicine, University of Oxford.
Eli Katunguka-Rwakishaya is a Ugandan veterinarian, academic and academic administrator. He is the Vice Chancellor of Kyambogo University, one of Uganda's public universities. He was appointed to that position in February 2014. Prior to that, he served at the Director of Postgraduate studies at Makerere University, the oldest and largest public university in the country.
Segenet Kelemu is an Ethiopian scientist, noted for her research as a molecular plant pathologist, and outstanding scientific leadership. For close to three decades, Kelemu and her team's research has contributed to addressing agricultural constraints in Africa, Asia, Latin America and North America.
Piet Borst CBE is emeritus professor of clinical biochemistry and molecular biology at the University of Amsterdam (UVA), and until 1999 director of research and chairman of the board of directors of the Netherlands Cancer Institute and the Antoni van Leeuwenhoekziekenhuis (NKI-AVL). He continued to work at the NKI-AVL as a staff member and group leader until 2016.
Thomas M. Kariuki is a Kenya biologist who is Chief Executive Officer of the Science for Africa Foundation. Kariuki previously served as the Director of Programmes for the Alliance for Accelerating Excellence in Science in Africa (AESA). He was the Director of the Institute of Primate Research/National Museums of Kenya, for seven years. Kariuki’s research interests have spanned the immunology of neglected infectious diseases and he has been involved in global efforts to develop vaccines, drugs and diagnostics for poverty-related diseases. He has published on vaccines and diagnostics development for schistosomiasis (Bilharzia), malaria and co-infections and on policy issues related to biomedical research and funding. He is a Fellow of the African Academy of Sciences (AAS), Senior Fellowship of the European Foundations Initiative for Neglected Tropical Diseases, Presidential honour of the Order of Grand Warrior of Kenya (OGW) for scientific leadership and public service, Honorary Professor of Research of the Liverpool School of Tropical Medicine, LSTM.
David Horn FRSE, is a Welcome Trust Senior Investigator, professor of parasite molecular biology, deputy head of the Division of Biological Chemistry and Drug Discovery and deputy director of the Welcome Trust Centre for Anti-Infectives Research in the School of Life Sciences, University of Dundee. His research is focused on antigenic variation, drug action and resistance and the application of genetic screens to African trypanosomes: parasitic protists that cause sleeping sickness or Human African Trypanosomiasis (HAT) and the livestock disease, nagana.
Delia Grace is an epidemiologist and a veterinarian. Grace joined the University of Greenwich in May 2020 as Professor of Food Safety Systems at the Natural Resources Institute. She is also Joint Appointed Scientist, Animal and Human Health Program at the International Livestock Research Institute (ILRI), Nairobi, Kenya.
Keith Roland Matthews,, , is a British cell biologist and parasitologist, currently Professor of Parasite Biology in the School of Biological Sciences at the University of Edinburgh. His research focuses on African trypanosomes, which cause human sleeping sickness and the equivalent cattle disease nagana.
