Leishmania donovani in the Indian subcontinent, Asia, and Africa and by L. infantum or L. chagasi in the Mediterranean region, Southwest and Central Asia, and South America
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Visceral Leishmaniasis
General Considerations The most common etiologic agents of VL are 3 species of the L. donovani complex: Leishmania donovani donovani and Leishmania donovani infantum in the Indian subcontinent, Africa, China, the Mediterranean littoral, and the Middle East; and Leishmania donovani chagasi in South America. (Hereafter, organisms will be identified only by genus and species; eg, L. donovani for L...
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Visceral leishmaniasis (VL), is an infection due to obligate intracellular protozoa of the genus Leishmania[1]. Natural transmission of the parasite happens primarilyby way ofthe bite of contaminated female of phlebotome. In the Old World it is represented by the genus Phlebotomous but in the New World it is called Lutzomyia. Another way of transmission may occur among the intravenous drug abus...
متن کاملLaboratory Diagnosis of Visceral Leishmaniasis
The group of diseases known as the leishmaniases are caused by obligate intracellular protozoa of the genus Leishmania (39). Natural transmission of leishmania is carried out by a certain species of sandfly of the genus Phlebotomus (Old World) or Lutzomyia (New World). These are present in three different forms: (i) visceral leishmaniasis (VL), (ii) cutaneous leishmaniasis, and (iii) mucocutane...
متن کاملComparative Microsatellite Typing of New World Leishmania infantum Reveals Low Heterogeneity among Populations and Its Recent Old World Origin
Leishmania infantum (syn. L. chagasi) is the causative agent of visceral leishmaniasis (VL) in the New World (NW) with endemic regions extending from southern USA to northern Argentina. The two hypotheses about the origin of VL in the NW suggest (1) recent importation of L. infantum from the Old World (OW), or (2) an indigenous origin and a distinct taxonomic rank for the NW parasite. Multilocu...
متن کاملEvolutionary and geographical history of the Leishmania donovani complex with a revision of current taxonomy.
Leishmaniasis is a geographically widespread severe disease, with an increasing incidence of two million cases per year and 350 million people from 88 countries at risk. The causative agents are species of Leishmania, a protozoan flagellate. Visceral leishmaniasis, the most severe form of the disease, lethal if untreated, is caused by species of the Leishmania donovani complex. These species ar...
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