rhodesienseis present in the south, but this distribution remains artificial due to population migrations and climatic changes [5]. Recently, its prevalence has dropped, largely because of the implementation of controls and intervention programs. is further complicated by the lack of support from local health infrastructure, which is at best weak, but often nonexistent. Therefore it is crucial to look for new more efficient technics for the diagnosis of stage which are also best suited to use in the field, in areas not possessing high-level health facilities. This review, after an overview of the disease, summarizes the current diagnosis procedures and presents Mouse monoclonal to FUK the advances in the field. == 1. General Presentation of the Disease == Human African Trypanosomiasis (HAT), or sleeping sickness, is a vector-borne parasitic disease endemic in sub-Saharan Africa. This disease is caused by an extracellular parasite calledTrypanosoma(genus)brucei(species). Three subspecies exist, which possess identical morphological characteristics (presence of a flagellum, a kinetoplast, and a nucleus) but differ in their ability to infect various hosts.Trypanosoma brucei brucei(T.b.b.) is a domestic animal parasite, which transmits Nagana disease, which is not pathogenic to humans [1]. The destruction ofT. b. bruceiis caused by two trypanolytic factors (TLF) complex content in human serum. Both TLF complexes include apolipoprotein L-1 (APOL1) and haptoglobulin-related protein (Hpr). Hpr has been thought for a long time to be the active trypanolytic component of TLF. But now there are more YH239-EE and more confirmative evidences showing that APOL1 is the trypanolytic factor of normal human serum [2]. This parasite has proven particularly useful for research purposes. Regarding the 2 human pathogens [3],T. b. gambienseis an anthroponotic parasite found in 24 countries of central and western Africa and causes a chronic syndrome.T. b. rhodesienseis zoonotic and is endemic in 13 countries of eastern and southern Africa and causes an acute syndrome [4]. However, increasingly, the spread ofT. b. rhodesiensehas been found, especially in Uganda, where the 2 diseases forms overlap.T. b. gambiense is present in the north whileT. b. rhodesienseis present in the south, but this distribution remains artificial due to population migrations and climatic changes [5]. Recently, its prevalence has dropped, largely because of the implementation of controls and intervention programs. It belongs to the group of Neglected Tropical Diseases. Neglected Tropical Diseases are diseases that develop mainly among the poorest populations. Currently HAT is one of 17 priority Neglected Tropical Diseases identified by WHO (World Health Corporation) as Malaria, HIV, and others [6]. HAT is considered to be a huge threat to general public health. Three severe epidemics have ravaged African populations. The first occurred at the end of the 19th century, the second during the 1920s, and the most recent began at the end of the 1970s and tends to be controlled today [1]. This disease outbreak is essentially linked to varied sociable, economic, and political issues. Indeed, 36 sub-Saharan African countries are affected [4,7], especially poor and remote rural areas (Number 1). Furthermore, current estimations display that 70 million people live at risk of contracting HAT illness. Among these, 57 million people are at risk of developinggambienseHAT and 12.3 million people are at risk of contractingrhodesienseHAT [4]. This disease is considered by WHO to be one of the Neglected Tropical Diseases, for which it is necessary to establish human population testing and disease control actions [4,6]. == Number 1. == Number of fresh cases of HAT YH239-EE reported in 2013 to the WHO [1]. This disease is definitely transmitted from the bite of the tsetse take flight during its blood meal. TheGlossinavector belongs to the Diptera order.Glossinais viviparous and both the male and female are capable of spreading disease [1]. Many subgenus flies are involved in the transmission of parasites:G. palpalis palpalisandG. p. gambiensistransmitT. b. gambienseandG. YH239-EE morsitanstransmitsT. b. rhodesiense[8]. These flies need particular conditions to survive (temp 16C38C, 50%80% relative moisture) [6]. However, theGlossinais classed like a bad vector, because it YH239-EE loses parasites at every blood meal, and because the female produces only 10 larvae during its lifetime [9]. During the blood meal, the infected.
