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Santana MCDO, Chourabi K, Cantanhêde LM, Cupolillo E. Exploring Host-Specificity: Untangling the Relationship between Leishmania ( Viannia) Species and Its Endosymbiont Leishmania RNA Virus 1. Microorganisms 2023; 11:2295. [PMID: 37764139 PMCID: PMC10535429 DOI: 10.3390/microorganisms11092295] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 09/03/2023] [Accepted: 09/07/2023] [Indexed: 09/29/2023] Open
Abstract
A relevant aspect in the epidemiology of Tegumentary Leishmaniasis (TL) are the Leishmania parasites carrying a viral endosymbiont, Leishmania RNA Virus 1 (LRV1), a dsRNA virus. Leishmania parasites carrying LRV1 are prone to causing more severe TL symptoms, increasing the likelihood of unfavorable clinical outcomes. LRV1 has been observed in the cultured strains of five L. (Viannia) species, and host specificity was suggested when studying the LRV1 from L. braziliensis and L. guyanensis strains. The coevolution hypothesis of LRV1 and Leishmania was based on phylogenetic analyses, implying an association between LRV1 genotypes, Leishmania species, and their geographic origins. This study aimed to investigate LRV1 specificity relative to Leishmania (Viannia) species hosts by analyzing LRV1 from L. (Viannia) species. To this end, LRV1 was screened in L. (Viannia) species other than L. braziliensis or L. guyanensis, and it was detected in 11 out of 15 L. naiffi and two out of four L. shawi. Phylogenetic analyses based on partial LRV1 genomic sequencing supported the hypothesis of host specificity, as LRV1 clustered according to their respective Leishmania species' hosts. These findings underscore the importance of investigating Leishmania and LRV1 coevolution and its impact on Leishmania (Viannia) species dispersion and pathogenesis in the American Continent.
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Affiliation(s)
- Mayara Cristhine de Oliveira Santana
- Leishmaniasis Research Laboratory, Oswaldo Cruz Institute, Oswaldo Cruz Foundation, Rio de Janeiro 21040360, Brazil; (M.C.d.O.S.); (L.M.C.)
- Instituto Nacional de Ciência e Tecnologia de Epidemiologia da Amazônia Ocidental, INCT EpiAmO, Porto Velho 76812100, Brazil
| | - Khaled Chourabi
- Leishmaniasis Research Laboratory, Oswaldo Cruz Institute, Oswaldo Cruz Foundation, Rio de Janeiro 21040360, Brazil; (M.C.d.O.S.); (L.M.C.)
- Instituto Nacional de Ciência e Tecnologia de Epidemiologia da Amazônia Ocidental, INCT EpiAmO, Porto Velho 76812100, Brazil
| | - Lilian Motta Cantanhêde
- Leishmaniasis Research Laboratory, Oswaldo Cruz Institute, Oswaldo Cruz Foundation, Rio de Janeiro 21040360, Brazil; (M.C.d.O.S.); (L.M.C.)
- Instituto Nacional de Ciência e Tecnologia de Epidemiologia da Amazônia Ocidental, INCT EpiAmO, Porto Velho 76812100, Brazil
| | - Elisa Cupolillo
- Leishmaniasis Research Laboratory, Oswaldo Cruz Institute, Oswaldo Cruz Foundation, Rio de Janeiro 21040360, Brazil; (M.C.d.O.S.); (L.M.C.)
- Instituto Nacional de Ciência e Tecnologia de Epidemiologia da Amazônia Ocidental, INCT EpiAmO, Porto Velho 76812100, Brazil
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Cantanhêde LM, Cupolillo E. Leishmania (Viannia) naiffi Lainson & Shaw 1989. Parasit Vectors 2023; 16:194. [PMID: 37291682 PMCID: PMC10251559 DOI: 10.1186/s13071-023-05814-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 05/18/2023] [Indexed: 06/10/2023] Open
Abstract
Just over 30 years ago, a new species of Leishmania of the subgenus Leishmania (Viannia) was described infecting the armadillo Dasypus novemcinctus; then, a report of human infection followed. From the Brazilian Amazon and apparently restricted to this region and its close borders, Leishmania (Viannia) naiffi has been characterized as a species that grows easily in axenic culture medium and causes few to no lesions after inoculation in experimental animal models. Results in the last decade indicate the occurrence of L. naiffi in vectors and human infections, including a report of therapeutic failure possibly associated with Leishmania RNA virus 1. Overall, such accounts suggest that the parasite is more dispersed and the disease less self-healing than previously expected.
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Affiliation(s)
- Lilian Motta Cantanhêde
- Leishmaniasis Research Laboratory, Oswaldo Cruz Institute, Fiocruz, Rio de Janeiro, Brazil
- Instituto Nacional de Ciência e Tecnologia de Epidemiologia da Amazônia Ocidental, INCT EpiAmO, Porto Velho, Brazil
| | - Elisa Cupolillo
- Leishmaniasis Research Laboratory, Oswaldo Cruz Institute, Fiocruz, Rio de Janeiro, Brazil
- Instituto Nacional de Ciência e Tecnologia de Epidemiologia da Amazônia Ocidental, INCT EpiAmO, Porto Velho, Brazil
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3
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Mendes Junior AAV, Filgueira CPB, Miranda LDFC, de Almeida AB, Cantanhêde LM, Fagundes A, Pereira SA, Menezes RC, Cupolillo E. First report of Leishmania (Mundinia) martiniquensis in South American territory and confirmation of Leishbunyavirus infecting this parasite in a mare. Mem Inst Oswaldo Cruz 2023; 118:e220220. [PMID: 37194810 DOI: 10.1590/0074-02760220220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Accepted: 04/03/2023] [Indexed: 05/18/2023] Open
Abstract
BACKGROUND Epidemiological data related to leishmaniases or Leishmania infection in horses are scarce. However, studies carried out in different regions in the world showed equids parasitised by Leishmania braziliensis, L. infantum and L. martiniquensis. OBJECTIVES Identify the Leishmania species causing cutaneous leishmaniasis in a mare, living in Rio de Janeiro State (Brazil), and search the presence of Leishmania viruses in the isolated parasite. METHODS Isoenzymes and polymerase chain reaction (PCR) targeting ITSrDNA region followed by sequencing were conducted for typing the isolated parasite. A search for Leishmania virus infection was also performed. FINDINGS The mare presented skin nodules and ulcers in the left pinna caused by Leishmania spp. that was detected by culture and PCR. The parasite was identified as Leishmania (Mundinia) martiniquensis, infected by Leishbunyavirus (LBV), representing the first description of this species in South America. The animal travelled to different Brazilian regions, but not to outside the country. MAIN CONCLUSIONS The worldwide distribution of L. martiniquensis and its infection by LBV were confirmed in this study, indicating the autochthonous transmission cycle in Brazil. The clinical profile of the disease in the mare, showing fast spontaneous healing of cutaneous lesions, may indicate that skin lesions related to L. martiniquensis infection in horses might be underdiagnosed.
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Affiliation(s)
- Artur Augusto Velho Mendes Junior
- Fundação Oswaldo Cruz-Fiocruz, Instituto Nacional de Infectologia Evandro Chagas, Laboratório de Pesquisa Clínica em Dermatozoonoses em Animais Domésticos, Rio de Janeiro, RJ, Brasil
| | | | - Luciana de Freitas Campos Miranda
- Fundação Oswaldo Cruz-Fiocruz, Laboratório de Pesquisa Clínica e Vigilância em Leishmanioses, Instituto Nacional de Infectologia Evandro Chagas, Rio de Janeiro, RJ, Brasil
| | - Adilson Benedito de Almeida
- Fundação Oswaldo Cruz-Fiocruz, Instituto Nacional de Infectologia Evandro Chagas, Laboratório de Pesquisa Clínica em Dermatozoonoses em Animais Domésticos, Rio de Janeiro, RJ, Brasil
| | - Lilian Motta Cantanhêde
- Fundação Oswaldo Cruz-Fiocruz, Instituto Oswaldo Cruz, Laboratório de Pesquisa em Leishmanioses, Rio de Janeiro, RJ, Brasil
| | - Aline Fagundes
- Fundação Oswaldo Cruz-Fiocruz, Laboratório de Pesquisa Clínica e Vigilância em Leishmanioses, Instituto Nacional de Infectologia Evandro Chagas, Rio de Janeiro, RJ, Brasil
| | - Sandro Antônio Pereira
- Fundação Oswaldo Cruz-Fiocruz, Instituto Nacional de Infectologia Evandro Chagas, Laboratório de Pesquisa Clínica em Dermatozoonoses em Animais Domésticos, Rio de Janeiro, RJ, Brasil
| | - Rodrigo Caldas Menezes
- Fundação Oswaldo Cruz-Fiocruz, Instituto Nacional de Infectologia Evandro Chagas, Laboratório de Pesquisa Clínica em Dermatozoonoses em Animais Domésticos, Rio de Janeiro, RJ, Brasil
| | - Elisa Cupolillo
- Fundação Oswaldo Cruz-Fiocruz, Instituto Oswaldo Cruz, Laboratório de Pesquisa em Leishmanioses, Rio de Janeiro, RJ, Brasil
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Jaimes JR. Severe mucosal leishmaniasis with torpid and fatal evolution. Clin Case Rep 2022; 10:e6220. [PMID: 35990382 PMCID: PMC9376139 DOI: 10.1002/ccr3.6220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Revised: 06/19/2022] [Accepted: 07/23/2022] [Indexed: 11/30/2022] Open
Abstract
Mucosal leishmaniasis is a clinical condition that is difficult to diagnose and treat and usually precedes a cutaneous leishmaniasis condition with a long latency period as observed in our study of a patient who experienced a torpid evolution in 9 months, caused by having had cutaneous leishmaniasis on the neck without therapeutic treatment, although with ulcer closure 18 years earlier, incomplete treatment with antimonials and amphotericin B, with the destruction of the eyeball, a large area of necrosis on the face and nasal bone exposure. Additionally, the patient had chronic anemia (9.4 g/dl), lymphopenia and neutrophilia (lymphocytes 13.1%, neutrophils 84.4%), and co‐infections by fungi (yeasts and hyphae) and Gram‐negative bacteria (multidrug‐resistant Proteus mirabilis and Escherichia coli) leading to sepsis and subsequent death of the patient.
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Costa TSD, Ferreira RMDA, Santos GS, Garcia Júnior MD, Pinto CB, Souto RNP. Entomological survey of phlebotominae sand flies (diptera: psychodidae) and vector species in the tegumentary leishmaniasis endemic area in eastern brazilian Amazon, Amapá state. BIOTA NEOTROPICA 2022. [DOI: 10.1590/1676-0611-bn-2021-1263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Abstract: American tegumentary leishmaniasis is an endemic that has increased considerably in recent decades in the Amazon region, sand flies are the vectors of the transmission of the protozoan that causes leishmaniasis, so the objective of this study was to carry out a survey of the diversity of species and the presence of Leishmania DNA in vectors circulating in three endemic counties for tegumentary leishmaniasis in the eastern Brazilian Amazon (Amapá state, Brazil). Using CDC light traps, a total of 10,773 specimens were collected between February 2019 and February 2020, representing 64 species in 15 genera. The vector specie Nyssomyia umbratilis Ward and Frahia, 1977 was the predominant species (13.20% of the total), being collected in all three counties, followed by Trichopygomyia trichopyga Floch & Abonnenc, 1945 (11.41%), Trichophoromyia ubiquitalis Mangabeira,1942 (9.47%) and Nyssomyia anduzei Rozeboom, 1942 (7.61%). For the identification of Leishmania DNA, 775 pools of unengorged females were used, of which 5 tested positive, 2 of Nyssomya umbratilis Ward & Fraiha,1977, 1 of Nyssomyia anduzei and 2 of Psychodopygus davisi Root,1934, demonstrating a natural total infection rate of 0.64%. This study increases the knowledge of vector diversity, as well as identifying Leishmania spp. in circulation in the eastern region of the Amazon.
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Affiliation(s)
- Tiago Silva da Costa
- Universidade Federal do Amapá, Brasil; Universidade Federal do Amapá (UNIFAP), Brasil
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Brilhante AF, Lima L, de Ávila MM, Medeiros-Sousa AR, de Souza JF, dos Santos NP, de Paula MB, Godoy RE, Sábio PB, Cardoso CDO, Nunes VLB, Teixeira MMG, Galati EAB. Remarkable diversity, new records and Leishmania detection in the sand fly fauna of an area of high endemicity for cutaneous leishmaniasis in Acre state, Brazilian Amazonian Forest. Acta Trop 2021; 223:106103. [PMID: 34416187 DOI: 10.1016/j.actatropica.2021.106103] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2021] [Revised: 08/11/2021] [Accepted: 08/11/2021] [Indexed: 10/20/2022]
Abstract
The species richness of Amazonian phlebotomines is considered to be one of the highest in the world. In the present study, we investigated the richness and diversity of phlebotomine fauna in Xapuri city, Acre state, Western Brazilian Amazonia, which is an area that is highly endemic for cutaneous leishmaniasis. Sand fly collections were performed monthly from August 2013 to July 2015 (288 h total of sampling effort) in intradomiciliary, peridomiciliary, and forested environments of two localities. Collected females were dissected, microscopically examined for flagellates in their guts, and preserved in ethanol. A total of 21,197 specimens comprising 14 genera and 57 species were collected, and the majority of these were Nyssomyia, Psychodopygus, and Trichophoromyia genera. Three new records of phlebotomine species for Acre are presented here, including Brumptomyia brumpti, Psathyromyia pradobarrientosi, and for the first time in Brazil, Th. omagua. In Xapuri, the phlebotomine fauna of different ecotopes was varied in regard to abundance, diversity, and frequency, and they included proven and permissive vectors of Leishmania spp. The fauna discovered in the forested areas (57 species) was richer and more diverse than was that (33 species) identified in the peri‑ and intra-domiciles. The identification of Leishmania subgenera that were present in sand fly guts according to SSU rRNA sequences revealed ten and three species harboring Leishmania of subgenera Viannia and Leishmania (most likely Leishmania amazonensis), respectively. The presence of Leishmania (Leishmania) in sand flies are reported here for the first time in Acre. The presence of L. (Viannia) spp. in Brumptomyia sp. and Lutzomyia sherlocki. and the occurrence of mixed infections with Leishmania of both subgenera in Ps. lainsoni have been reported for the first time in Brazil. Taken together, data from previous studies and from the present study highlight the remarkable complexity of phlebotomine fauna that is possibly due to the well-preserved Xapuri forested areas sustaining vital economic activities of plant extraction and ecological tourism. Our findings also provide new insights into the ongoing adaptation of Trichophoromyia and Psychodopygus species to human habitats.
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Marzochi MCDA, Marzochi KBF, Fagundes A, Schubach ADO, Miranda LDFC, Pacheco RDS. Anthropogenic Dispersal of Leishmania (Viannia) braziliensis in the Americas: A Plausible Hypothesis. FRONTIERS IN TROPICAL DISEASES 2021. [DOI: 10.3389/fitd.2021.723017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
There are several gaps in our knowledge on the origin and spread of Leishmania (Viannia) braziliensis, an etiological agent of cutaneous and mucocutaneous or American tegumentary leishmaniasis, to different biomes, hosts, and vectors, with important epidemiological implications, including the possible existence of an anthroponotic component. Historical, biological, and epidemiological evidence suggests that Leishmania (V.) braziliensis and its variants were preexistent in Amazonia with great genetic variability, where they dispersed with less variability to other regions (clonal expansion). During pre-Columbian times the parasite may have been transported by migrating humans and probably also their dogs, from western Amazonia to the high inter-Andean valleys and from there to other regions of South America. The same thing could have happened later, in the same way, when it spread to non-Amazonian regions of Brazil and other countries of South and Central America, between the late 19th and early 20th centuries, during the so-called Rubber Boom and construction of the Madeira-Mamoré Railway in the Brazilian Amazon, by migrant workers who later returned to their places of origin, transporting the agent. The parasite’s dispersal in genetic correlated clusters, involving unexpectedly distinct ecosystems in Brazil (Amazonian, Cerrado, Caatinga and Atlantic Forest biomes), has continued until the present through human displacement. The infection of certain species of domestic, synanthropic and even wild animals, could be secondary to anthropogenic introduction of L. (V.) braziliensis in new environments. We admit the same phenomena happening in the probable transference of Leishmania infantum (visceral leishmaniasis), and of Yersinia pestis (plague) from the Old world to the New world, generating domestic and wild enzotic cycles from these agents. These assumptions associated with human infections, chronicity and parasite persistence with possibility of recovery of Leishmania in peripheral blood, skin and scars of cured or asymptomatic patients, (that may provide an alternative blood meal), along with the sand flies’ adaptation to the peri-domicile and the high susceptibility of domestic dogs, horses, mules and cats to the parasite, can reinforce the evidence of anthropogenic spread of L. (V.) braziliensis.
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Shaheen N, Verma C, Pacheco-Fernandez T, Volpedo G, Hamid A, Zeb I, Shah SAA, Fahad S, Iqbal A, Ashraf A, Khan A, Gul M, Khan MI, Fatima H, Afzal M, Satoskar AR, Qureshi NA. Molecular characterization and genetic diversity of cutaneous leishmaniasis from North Eastern Pakistan. Acta Trop 2021; 221:105964. [PMID: 34023304 DOI: 10.1016/j.actatropica.2021.105964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 04/28/2021] [Accepted: 05/11/2021] [Indexed: 11/17/2022]
Abstract
The genetic diversity of Leishmania spp. in North Eastern Pakistan remains undetermined despite increased cases of cutaneous leishmaniasis (CL). This study was designed to decipher the molecular characterization and genetic diversity of Leishmania spp. in North Eastern Pakistan. Out of 13761 CL suspected cases, 567 cases were microscopically positive and confirmed as Leishmania spp. by internal transcribed spacer (ITS) gene amplification through the PCR- RFLP technique. Further, isolates were directly sequenced to conduct phylogenetic analysis for genetic diversity. Among suspected CL cases, Mirpur showed the highest proportion of CL infection with 4.85% (118/2431) of the cases, while the Neelum district showed the lowest percentage at 3.29% (9/273). The slide positivity rate, annual blood examination rate, and annual parasite incidence rate were 3.84, 0.27, and 0.01% respectively, and the incidence of CL in the age group 1-20 years old was higher in males (50.92%) than females (25.75%). The RFLP analysis and sequencing confirmed the occurrence of Leishmania tropica, Leishmania major, and Leishmania infantum. Leishmania tropica (p = 0.02) confirmed significantly higher nucleotides variation than L. major (p = 0.05). Current findings confirmed the prior assumption that anthroponotic CL is the primary CL form present in North Eastern Pakistan. Moreover, this is the first report based on molecular identification of L. major, and L. infantum from North Eastern Pakistan. This remarkable heterogeneity in the Leishmania spp. is the leading cause of treatment failure and emergence of new haplotypes. Therefore more extensive investigations are recommended from all geographical regions of North Eastern Pakistan, especially those using a large sample size.
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Affiliation(s)
- Nargis Shaheen
- Department of Zoology, Faculty of Biological Science, Quaid-i-Azam University Islamabad 45320, Pakistan; Department of Pathology, College of Medicine, The Ohio State University, Columbus, OH 43210, United States
| | - Chaitenya Verma
- Department of Pathology, College of Medicine, The Ohio State University, Columbus, OH 43210, United States
| | - Thalia Pacheco-Fernandez
- Department of Pathology, College of Medicine, The Ohio State University, Columbus, OH 43210, United States
| | - Greta Volpedo
- Department of Pathology, College of Medicine, The Ohio State University, Columbus, OH 43210, United States
| | - Aneeqa Hamid
- Department of Pharmacy, Faculty of Biological Science, Quaid-i-Azam University Islamabad 45320, Pakistan
| | - Ismail Zeb
- Department of Zoology, Faculty of Biological Science, Quaid-i-Azam University Islamabad 45320, Pakistan
| | - Syed Aizaz Ali Shah
- Department of Zoology, Faculty of Biological Science, Quaid-i-Azam University Islamabad 45320, Pakistan
| | - Shah Fahad
- Department of Zoology, Faculty of Biological Science, Quaid-i-Azam University Islamabad 45320, Pakistan
| | - Attiya Iqbal
- Department of Zoology, Faculty of Biological Science, Quaid-i-Azam University Islamabad 45320, Pakistan
| | - Asma Ashraf
- Department of Zoology, Faculty of Biological Science, Quaid-i-Azam University Islamabad 45320, Pakistan
| | - Amjad Khan
- Department of Zoology, Faculty of Biological Science, Quaid-i-Azam University Islamabad 45320, Pakistan; Departement of Zoology, Faculty of Science,University of lakki marwat 28420, Khyber Pakhtunkhwa, Pakistan
| | - Misbah Gul
- Department of Zoology, Faculty of Biological Science, Quaid-i-Azam University Islamabad 45320, Pakistan
| | - Muhammad Ilyas Khan
- Department of Zoology, Kohat University of Science and Technology Khyber Pakhtunkhwa Islamabad, Pakistan
| | - Huma Fatima
- Department of Zoology, Faculty of Biological Science, Quaid-i-Azam University Islamabad 45320, Pakistan
| | - Muhammad Afzal
- Department of Zoology, Faculty of Biological Science, Quaid-i-Azam University Islamabad 45320, Pakistan
| | - Abhay R Satoskar
- Department of Pathology, College of Medicine, The Ohio State University, Columbus, OH 43210, United States
| | - Naveeda Akhter Qureshi
- Department of Zoology, Faculty of Biological Science, Quaid-i-Azam University Islamabad 45320, Pakistan.
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Salgueiro MM, Pimentel MIF, Miranda LFC, Cunha E Silva RR, Oliveira LFA, Lyra MR, Saheki MN, Valete-Rosalino CM, Martins ACC, Schubach AO, Marzochi MCA, Bedoya-Pacheco SJ. Parasite species variation and impact of spatial displacement of the population on cutaneous leishmaniasis in Rio de Janeiro, Brazil. Trans R Soc Trop Med Hyg 2021; 116:70-79. [PMID: 34125907 DOI: 10.1093/trstmh/trab088] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Revised: 03/05/2021] [Accepted: 06/03/2021] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Cutaneous leishmaniasis results from complex interactions between human beings, vectors and the environment. Parasitic species differ in epidemiological and geographical contexts. METHODS We studied a retrospective cohort of 696 patients with cutaneous leishmaniasis treated at a reference centre in the state of Rio de Janeiro, Brazil, between 2000 and 2015. We analysed displacements due to work, leisure and migrations with identification of Leishmania species. RESULTS The geographic distribution of autochthonous cases showed that >95% of infections occurred in urban areas. In the state of Rio de Janeiro, most cases were concentrated in the cities surrounding forest parks and nature conservation areas. The same applies to the city of Rio de Janeiro, where these infections occurred in the neighbourhoods surrounding some mountain and forest areas. The non-displacement group included 575 (82.6%) patients and the displacement group included 121 (17.4%) patients. Leishmania (Viannia) braziliensis predominated in both groups. Other species were found in the displacement group. CONCLUSIONS The disordered urbanization of the state of Rio de Janeiro in recent decades has created conditions for the emergence of urban foci of transmission close to forest areas. Changes in the environment, movement of infected individuals and adaptation of sandflies may have contributed to this.
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Affiliation(s)
- Mariza M Salgueiro
- Laboratório de Pesquisa Clínica e Vigilância em Leishmanioses, Instituto Nacional de Infectologia Evandro Chagas, Fundação Oswaldo Cruz, Av. Brasil, 4365, Manguinhos, Rio de Janeiro, CEP: 21040-900, RJ, Brazil
| | - Maria Inês F Pimentel
- Laboratório de Pesquisa Clínica e Vigilância em Leishmanioses, Instituto Nacional de Infectologia Evandro Chagas, Fundação Oswaldo Cruz, Av. Brasil, 4365, Manguinhos, Rio de Janeiro, CEP: 21040-900, RJ, Brazil
| | - Luciana F C Miranda
- Laboratório de Pesquisa Clínica e Vigilância em Leishmanioses, Instituto Nacional de Infectologia Evandro Chagas, Fundação Oswaldo Cruz, Av. Brasil, 4365, Manguinhos, Rio de Janeiro, CEP: 21040-900, RJ, Brazil
| | - Rafael R Cunha E Silva
- Departamento de Epidemiologia e Métodos Quantitativos em Saúde, Escola Nacional de Saúde Pública Sérgio Arouca, Fundação Oswaldo Cruz, Rua Leopoldo Bulhões, 1480, Manguinhos, Rio de Janeiro, CEP: 21041-210, RJ, Brazil
| | - Liliane F A Oliveira
- Laboratório de Pesquisa Clínica e Vigilância em Leishmanioses, Instituto Nacional de Infectologia Evandro Chagas, Fundação Oswaldo Cruz, Av. Brasil, 4365, Manguinhos, Rio de Janeiro, CEP: 21040-900, RJ, Brazil
| | - Marcelo R Lyra
- Laboratório de Pesquisa Clínica e Vigilância em Leishmanioses, Instituto Nacional de Infectologia Evandro Chagas, Fundação Oswaldo Cruz, Av. Brasil, 4365, Manguinhos, Rio de Janeiro, CEP: 21040-900, RJ, Brazil
| | - Mauricio N Saheki
- Laboratório de Pesquisa Clínica e Vigilância em Leishmanioses, Instituto Nacional de Infectologia Evandro Chagas, Fundação Oswaldo Cruz, Av. Brasil, 4365, Manguinhos, Rio de Janeiro, CEP: 21040-900, RJ, Brazil
| | - Claudia M Valete-Rosalino
- Laboratório de Pesquisa Clínica e Vigilância em Leishmanioses, Instituto Nacional de Infectologia Evandro Chagas, Fundação Oswaldo Cruz, Av. Brasil, 4365, Manguinhos, Rio de Janeiro, CEP: 21040-900, RJ, Brazil.,Productivity grant (PQ) of the "Programa de Produtividade em Pesquisa", Conselho Nacional de Desenvolvimento Científico e Tecnológico, SHIS QI 01, Conjunto B, Blocos A, B, C e D, Edifício Santos Dumont, Lago Sul, Brasília, CEP: 71.605-001, DF, Brazil.,Departamento de Otorrinolaringologia e Oftalmologia, Faculdade de Medicina, Universidade Federal do Rio de Janeiro, Av. Carlos Chagas Filho, 373 - Bloco K, 2º andar, Sala 49 - Cidade Universitária da Universidade Federal do Rio de Janeiro, Rio de Janeiro, CEP: 21044-020, RJ, Brazil
| | - Ana Cristina C Martins
- Laboratório de Pesquisa Clínica e Vigilância em Leishmanioses, Instituto Nacional de Infectologia Evandro Chagas, Fundação Oswaldo Cruz, Av. Brasil, 4365, Manguinhos, Rio de Janeiro, CEP: 21040-900, RJ, Brazil
| | - Armando O Schubach
- Laboratório de Pesquisa Clínica e Vigilância em Leishmanioses, Instituto Nacional de Infectologia Evandro Chagas, Fundação Oswaldo Cruz, Av. Brasil, 4365, Manguinhos, Rio de Janeiro, CEP: 21040-900, RJ, Brazil.,Productivity grant (PQ) of the "Programa de Produtividade em Pesquisa", Conselho Nacional de Desenvolvimento Científico e Tecnológico, SHIS QI 01, Conjunto B, Blocos A, B, C e D, Edifício Santos Dumont, Lago Sul, Brasília, CEP: 71.605-001, DF, Brazil
| | - Mauro C A Marzochi
- Laboratório de Pesquisa Clínica e Vigilância em Leishmanioses, Instituto Nacional de Infectologia Evandro Chagas, Fundação Oswaldo Cruz, Av. Brasil, 4365, Manguinhos, Rio de Janeiro, CEP: 21040-900, RJ, Brazil.,Productivity grant (PQ) of the "Programa de Produtividade em Pesquisa", Conselho Nacional de Desenvolvimento Científico e Tecnológico, SHIS QI 01, Conjunto B, Blocos A, B, C e D, Edifício Santos Dumont, Lago Sul, Brasília, CEP: 71.605-001, DF, Brazil
| | - Sandro J Bedoya-Pacheco
- Departamento de Epidemiologia e Métodos Quantitativos em Saúde, Escola Nacional de Saúde Pública Sérgio Arouca, Fundação Oswaldo Cruz, Rua Leopoldo Bulhões, 1480, Manguinhos, Rio de Janeiro, CEP: 21041-210, RJ, Brazil
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10
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de Almeida JV, de Souza CF, Fuzari AA, Joya CA, Valdivia HO, Bartholomeu DC, Brazil RP. Diagnosis and identification of Leishmania species in patients with cutaneous leishmaniasis in the state of Roraima, Brazil's Amazon Region. Parasit Vectors 2021; 14:32. [PMID: 33413563 PMCID: PMC7791761 DOI: 10.1186/s13071-020-04539-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2020] [Accepted: 12/11/2020] [Indexed: 12/18/2022] Open
Abstract
Background Cutaneous leishmaniasis (CL) is an endemic disease in Brazil that is highly prevalent in the northern region of the country. Although there is a continuous and growing number of cases registered in the state of Roraima, there is limited information regarding the species of Leishmania that affect the human population. In this study, we aimed to characterize which Leishmania species cause human disease in those presenting with cutaneous leishmaniasis in endemic areas of the State of Roraima. Methods We conducted a prospective surveillance study between 2016 to 2018 in health centers located in the State of Roraima, Brazil. Participants with clinical suspicion of CL were enrolled and provided lesion samples for parasitological detection by microscopy. A subset of the samples was tested by polymerase chain reaction and sequencing of the internal transcribed spacer 1 (ITS-1 PCR) for molecular species identification. Results A total of 262 participants were enrolled in this study. Of those, 129 (49.27%) were positive by parasitological examination. Most positive subjects (81.58%) were male, and most cases presented a single lesion (80.26%). ITS-1 PCR and sequencing on a subset of 76 samples allowed us to detect nine different species of Leishmania: L. (V.) braziliensis, L (V.) panamensis, L. (V.) guyanensis, L. (V.) naiffi, L. (V.) shawi, L.(V.) utingensis, L. (V.) lindenbergi, L. (L.) amazonensis and L. (L.) mexicana. Conclusions Our study provides the first assessment of circulating species of Leishmania in the State of Roraima, Brazil, and shows the high diversity in this region. This study opens the path for further research on the transmission of leishmaniasis in the northernmost Brazilian State including vector and reservoir surveillance as well as for intensification of investigation and control activities against CL in the region.![]()
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Affiliation(s)
- Joseneide Viana de Almeida
- Programa de Pós-Graduação em Biologia Parasitária, Instituto Oswaldo Cruz/Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brasil
| | - Cristian Ferreira de Souza
- Laboratório de Doenças Parasitárias, Instituto Oswaldo Cruz/Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brazil
| | - Andressa Alencastre Fuzari
- Laboratório de Doenças Parasitárias, Instituto Oswaldo Cruz/Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brazil
| | - Christie A Joya
- Department of Parasitology, US Naval Medical Research Unit 6, Lima, Peru
| | - Hugo O Valdivia
- Department of Parasitology, US Naval Medical Research Unit 6, Lima, Peru
| | | | - Reginaldo Peçanha Brazil
- Laboratório de Doenças Parasitárias, Instituto Oswaldo Cruz/Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brazil.
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11
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Gonçalves LP, Santos TVD, Campos MB, Lima LVDR, Ishikawa EAY, Silveira FT, Ramos PKS. Further insights into the eco-epidemiology of American cutaneous leishmaniasis in the Belem metropolitan region, Pará State, Brazil. Rev Soc Bras Med Trop 2020; 53:e20200255. [PMID: 33331607 PMCID: PMC7747830 DOI: 10.1590/0037-8682-0255-2020] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Accepted: 10/19/2020] [Indexed: 11/22/2022] Open
Abstract
INTRODUCTION: In the Belém Metropolitan Region (BMR), Pará State, Brazil, American
cutaneous leishmaniasis (ACL) is endemic; however, very little is known
regarding its causative agents. Therefore, we used our standard diagnostic
approach combined with an RNA polymerase II largest subunit
(RNAPOIILS)-polymerase chain reaction (PCR) followed by analysis of
restriction fragment length polymorphism (PCR-RFLP) to identify
Leishmania spp. ACL agents in this region. METHODS: Thirty-two Leishmania spp. isolates from patients with ACL
in the BMR during 1995-2018 were analyzed. Leishmania spp.
DNA samples were amplified using the primers RPOR2/RPOF2, and the 615-bp PCR
products were subjected to enzymatic digestion using TspRI
and HgaI endonucleases. RESULTS: ACL etiological agents in the BMR comprised Leishmania (Viannia)
lindenbergi (43.7%) followed by Leishmania (Viannia)
lainsoni (34.4%), Leishmania (Leishmania)
amazonensis (12.5%), and Leishmania (Viannia)
braziliensis (9.4%). CONCLUSIONS: To our knowledge, the results of the study revealed for the first time that
L. (V.) lindenbergi and L. (V.)
lainsoni are the main ACL agents in BMR.
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Affiliation(s)
- Lucas Pantoja Gonçalves
- Instituto Evandro Chagas, Laboratório de Leishmanioses 'Prof. Dr. Ralph Lainson', Seção de Parasitologia, Ananindeua, PA, Brasil
| | - Thiago Vasconcelos Dos Santos
- Instituto Evandro Chagas, Laboratório de Leishmanioses 'Prof. Dr. Ralph Lainson', Seção de Parasitologia, Ananindeua, PA, Brasil
| | - Marliane Batista Campos
- Instituto Evandro Chagas, Laboratório de Leishmanioses 'Prof. Dr. Ralph Lainson', Seção de Parasitologia, Ananindeua, PA, Brasil
| | - Luciana Vieira do Rêgo Lima
- Instituto Evandro Chagas, Laboratório de Leishmanioses 'Prof. Dr. Ralph Lainson', Seção de Parasitologia, Ananindeua, PA, Brasil
| | | | - Fernando Tobias Silveira
- Instituto Evandro Chagas, Laboratório de Leishmanioses 'Prof. Dr. Ralph Lainson', Seção de Parasitologia, Ananindeua, PA, Brasil.,Universidade Federal do Pará, Núcleo de Medicina Tropical, Belém, PA, Brasil
| | - Patrícia Karla Santos Ramos
- Instituto Evandro Chagas, Laboratório de Leishmanioses 'Prof. Dr. Ralph Lainson', Seção de Parasitologia, Ananindeua, PA, Brasil
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12
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Araujo-Pereira TD, Pita-Pereira DD, Baia-Gomes SM, Boité M, Silva F, Pinto IDS, de Sousa RLT, Fuzari A, de Souza C, Brazil R, Britto C. An overview of the sandfly fauna (Diptera: Psychodidae) followed by the detection of Leishmania DNA and blood meal identification in the state of Acre, Amazonian Brazil. Mem Inst Oswaldo Cruz 2020; 115:e200157. [PMID: 33206821 PMCID: PMC7668085 DOI: 10.1590/0074-02760200157] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Accepted: 10/05/2020] [Indexed: 11/22/2022] Open
Abstract
BACKGROUND In Acre state, Brazil, the dissemination of cutaneous leishmaniasis has increased in recent years, with limited knowledge of the potential Leishmania spp. vectors involved. OBJECTIVES Here, data concerning the sandfly fauna of Brasiléia municipality, Leishmania DNA-detection rates and the identification of blood meal sources of insects captured in 2013-2015 are presented. METHODS Parasite detection in female sandflies was performed individually by multiplex polymerase chain reaction (PCR) (Leishmania kDNA/sandfly cacophony-gene), with the identification of Leishmania spp. by hsp70-PCR and sequencing. The identification of blood gut-content from fed females was performed by cyt b-PCR and sequencing. FINDINGS A total of 4,473 sandflies were captured. A subgroup of 864 non-blood-fed females evaluated for the presence of Leishmania DNA showed 2.9% positivity for Leishmania (Viannia) braziliensis and L. (V.) guyanensis. The identification of blood meal sources was performed in 96 blood-fed females, allowing the identification of 13 vertebrate species. In nine/96 fed females, DNA from L. (V.) shawi, L. (V.) guyanensis, L. (V.) braziliensis and Endotrypanum sp. was detected. MAIN CONCLUSIONS In Brumptomyia sp. and Evandromyia termitophila, the first report of Leishmania DNA-detection is provided in Acre; Nyssomyia shawi is implicated as potential vector of L. (V.) braziliensis and L. (V.) guyanensis for the first time in Brazil.
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Affiliation(s)
- Thais de Araujo-Pereira
- Fundação Oswaldo Cruz-Fiocruz, Instituto Oswaldo Cruz, Laboratório de Biologia Molecular e Doenças Endêmicas, Rio de Janeiro, RJ, Brasil
| | - Daniela de Pita-Pereira
- Fundação Oswaldo Cruz-Fiocruz, Instituto Oswaldo Cruz, Laboratório de Biologia Molecular e Doenças Endêmicas, Rio de Janeiro, RJ, Brasil
| | - Sandylere Moreira Baia-Gomes
- Fundação Oswaldo Cruz-Fiocruz, Instituto Oswaldo Cruz, Laboratório de Biologia Molecular e Doenças Endêmicas, Rio de Janeiro, RJ, Brasil
| | - Mariana Boité
- Fundação Oswaldo Cruz-Fiocruz, Instituto Oswaldo Cruz, Laboratório de Pesquisa em Leishmanioses, Rio de Janeiro, RJ, Brasil
| | - Franklin Silva
- Fundação Oswaldo Cruz-Fiocruz, Centro De Desenvolvimento Tecnológico em Saúde, Laboratório de Modelagem de Sistemas Biológicos, Rio de Janeiro, RJ, Brasil
| | | | - Raimundo Leoberto Torres de Sousa
- Fundação Oswaldo Cruz-Fiocruz, Instituto Oswaldo Cruz, Laboratório de Biologia Molecular e Doenças Endêmicas, Rio de Janeiro, RJ, Brasil
| | - Andressa Fuzari
- Fundação Oswaldo Cruz-Fiocruz, Instituto Oswaldo Cruz, Laboratório de Doenças Parasitárias, Rio de Janeiro, RJ, Brasil
| | - Cristian de Souza
- Fundação Oswaldo Cruz-Fiocruz, Instituto Oswaldo Cruz, Laboratório de Doenças Parasitárias, Rio de Janeiro, RJ, Brasil
| | - Reginaldo Brazil
- Fundação Oswaldo Cruz-Fiocruz, Instituto Oswaldo Cruz, Laboratório de Doenças Parasitárias, Rio de Janeiro, RJ, Brasil
| | - Constança Britto
- Fundação Oswaldo Cruz-Fiocruz, Instituto Oswaldo Cruz, Laboratório de Biologia Molecular e Doenças Endêmicas, Rio de Janeiro, RJ, Brasil
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Pinart M, Rueda JR, Romero GA, Pinzón-Flórez CE, Osorio-Arango K, Silveira Maia-Elkhoury AN, Reveiz L, Elias VM, Tweed JA. Interventions for American cutaneous and mucocutaneous leishmaniasis. Cochrane Database Syst Rev 2020; 8:CD004834. [PMID: 32853410 PMCID: PMC8094931 DOI: 10.1002/14651858.cd004834.pub3] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
BACKGROUND On the American continent, cutaneous and mucocutaneous leishmaniasis (CL and MCL) are diseases associated with infection by several species of Leishmania parasites. Pentavalent antimonials remain the first-choice treatment. There are alternative interventions, but reviewing their effectiveness and safety is important as availability is limited. This is an update of a Cochrane Review first published in 2009. OBJECTIVES To assess the effects of interventions for all immuno-competent people who have American cutaneous and mucocutaneous leishmaniasis (ACML). SEARCH METHODS We updated our database searches of the Cochrane Skin Group Specialised Register, CENTRAL, MEDLINE, Embase, LILACS and CINAHL to August 2019. We searched five trials registers. SELECTION CRITERIA Randomised controlled trials (RCTs) assessing either single or combination treatments for ACML in immuno-competent people, diagnosed by clinical presentation and Leishmania infection confirmed by smear, culture, histology, or polymerase chain reaction on a biopsy specimen. The comparators were either no treatment, placebo only, or another active compound. DATA COLLECTION AND ANALYSIS We used standard methodological procedures expected by Cochrane. Our key outcomes were the percentage of participants 'cured' at least three months after the end of treatment, adverse effects, and recurrence. We used GRADE to assess evidence certainty for each outcome. MAIN RESULTS We included 75 studies (37 were new), totalling 6533 randomised participants with ATL. The studies were mainly conducted in Central and South America at regional hospitals, local healthcare clinics, and research centres. More male participants were included (mean age: roughly 28.9 years (SD: 7.0)). The most common confirmed species were L. braziliensis, L. panamensis, and L. mexicana. The most assessed interventions and comparators were non-antimonial systemics (particularly oral miltefosine) and antimonials (particularly meglumine antimoniate (MA), which was also a common intervention), respectively. Three studies included moderate-to-severe cases of mucosal leishmaniasis but none included cases with diffuse cutaneous or disseminated CL, considered the severe cutaneous form. Lesions were mainly ulcerative and located in the extremities and limbs. The follow-up (FU) period ranged from 28 days to 7 years. All studies had high or unclear risk of bias in at least one domain (especially performance bias). None of the studies reported the degree of functional or aesthetic impairment, scarring, or quality of life. Compared to placebo, at one-year FU, intramuscular (IM) MA given for 20 days to treat L. braziliensis and L. panamensis infections in ACML may increase the likelihood of complete cure (risk ratio (RR) 4.23, 95% confidence interval (CI) 0.84 to 21.38; 2 RCTs, 157 participants; moderate-certainty evidence), but may also make little to no difference, since the 95% CI includes the possibility of both increased and reduced healing (cure rates), and IMMA probably increases severe adverse effects such as myalgias and arthralgias (RR 1.51, 95% CI 1.17 to 1.96; 1 RCT, 134 participants; moderate-certainty evidence). IMMA may make little to no difference to the recurrence risk, but the 95% CI includes the possibility of both increased and reduced risk (RR 1.79, 95% CI 0.17 to 19.26; 1 RCT, 127 participants; low-certainty evidence). Compared to placebo, at six-month FU, oral miltefosine given for 28 days to treat L. mexicana, L. panamensis and L. braziliensis infections in American cutaneous leishmaniasis (ACL) probably improves the likelihood of complete cure (RR 2.25, 95% CI 1.42 to 3.38), and probably increases nausea rates (RR 3.96, 95% CI 1.49 to 10.48) and vomiting (RR 6.92, 95% CI 2.68 to 17.86) (moderate-certainty evidence). Oral miltefosine may make little to no difference to the recurrence risk (RR 2.97, 95% CI 0.37 to 23.89; low-certainty evidence), but the 95% CI includes the possibility of both increased and reduced risk (all based on 1 RCT, 133 participants). Compared to IMMA, at 6 to 12 months FU, oral miltefosine given for 28 days to treat L. braziliensis, L. panamensis, L. guyanensis and L. amazonensis infections in ACML may make little to no difference to the likelihood of complete cure (RR 1.05, 95% CI 0.90 to 1.23; 7 RCTs, 676 participants; low-certainty evidence). Based on moderate-certainty evidence (3 RCTs, 464 participants), miltefosine probably increases nausea rates (RR 2.45, 95% CI 1.72 to 3.49) and vomiting (RR 4.76, 95% CI 1.82 to 12.46) compared to IMMA. Recurrence risk was not reported. For the rest of the key comparisons, recurrence risk was not reported, and risk of adverse events could not be estimated. Compared to IMMA, at 6 to 12 months FU, oral azithromycin given for 20 to 28 days to treat L. braziliensis infections in ACML probably reduces the likelihood of complete cure (RR 0.51, 95% CI 0.34 to 0.76; 2 RCTs, 93 participants; moderate-certainty evidence). Compared to intravenous MA (IVMA) and placebo, at 12 month FU, adding topical imiquimod to IVMA, given for 20 days to treat L. braziliensis, L. guyanensis and L. peruviana infections in ACL probably makes little to no difference to the likelihood of complete cure (RR 1.30, 95% CI 0.95 to 1.80; 1 RCT, 80 participants; moderate-certainty evidence). Compared to MA, at 6 months FU, one session of local thermotherapy to treat L. panamensis and L. braziliensis infections in ACL reduces the likelihood of complete cure (RR 0.80, 95% CI 0.68 to 0.95; 1 RCT, 292 participants; high-certainty evidence). Compared to IMMA and placebo, at 26 weeks FU, adding oral pentoxifylline to IMMA to treat CL (species not stated) probably makes little to no difference to the likelihood of complete cure (RR 0.86, 95% CI 0.63 to 1.18; 1 RCT, 70 participants; moderate-certainty evidence). AUTHORS' CONCLUSIONS Evidence certainty was mostly moderate or low, due to methodological shortcomings, which precluded conclusive results. Overall, both IMMA and oral miltefosine probably result in an increase in cure rates, and nausea and vomiting are probably more common with miltefosine than with IMMA. Future trials should investigate interventions for mucosal leishmaniasis and evaluate recurrence rates of cutaneous leishmaniasis and its progression to mucosal disease.
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Affiliation(s)
- Mariona Pinart
- Free time independent Cochrane reviewer, Berlin, Germany
| | - José-Ramón Rueda
- Department of Preventive Medicine and Public Health, University of the Basque Country, Leioa, Spain
| | - Gustavo As Romero
- Center for Tropical Medicine, University of Brasilia, Brasilia, Brazil
| | | | - Karime Osorio-Arango
- Dirección de Redes en Salud Pública, Instituto Nacional de Salud, Bogotá, Colombia
| | - Ana Nilce Silveira Maia-Elkhoury
- Communicable Diseases and Environmental Determinants of Health (CDE), Neglected, Tropical and Vector Borne Diseases (VT), Pan American Health Organization/ World Health Organization (PAHO/WHO), Rio de Janeiro, Brazil
| | - Ludovic Reveiz
- Evidence and Intelligence for Action in Health Department, Pan American Health Organization (PAHO), Washington DC, USA
| | - Vanessa M Elias
- Evidence and Intelligence for Action in Health Department, Pan American Health Organization (PAHO), Washington DC, USA
| | - John A Tweed
- c/o Cochrane Skin Group, The University of Nottingham, Nottingham, UK
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14
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Miranda LDFC, Pacheco RDS, Pimentel MIF, Salgueiro MDM, da Silva AF, de Mello CX, Barros JHDS, Valete-Rosalino CM, Madeira MDF, Xavier SCDC, Schubach ADO. Geospatial analysis of tegumentary leishmaniasis in Rio de Janeiro state, Brazil from 2000 to 2015: Species typing and flow of travelers and migrants with leishmaniasis. PLoS Negl Trop Dis 2019; 13:e0007748. [PMID: 31730650 PMCID: PMC6857848 DOI: 10.1371/journal.pntd.0007748] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Accepted: 09/04/2019] [Indexed: 11/19/2022] Open
Abstract
Background We identified the species of Leishmania isolated from traveling and migrant patients attended in a reference center from 2000 to 2015, we performed the georeferencing of these species in Rio de Janeiro (RJ) state and we had knowledge about the human flows between the likely location of infection (LLI) and place of residence (PR) in RJ state, Brazil. Methodology/Principal findings This is a retrospective cross-sectional study including 171 patients diagnosed with ATL. Google Maps, OpenStreetMap, and Bing Maps were tools used to georeference LLI and PR. For etiological identification, we used isoenzyme electrophoresis, polymerase chain reaction-restriction fragment length polymorphism (molecular target hsp70C with restriction enzymes HaeIII and BstUI), and sequencing of the internal transcribed spacer of ribosomal DNA. ARCGIS software was used to create maps of the geographic distribution of Leishmania species in the state and municipality of RJ, together with flows between the LLI and PR. Isolates from 104 patients were identified as: L. (Viannia) braziliensis (80.8%), L. (V.) naiffi (7.7%), L. (V.) guyanensis (6.7%), L. (Leishmania) amazonensis (1%), and genetic variants of L. (V.) braziliensis (3.8%). The flow maps showed that the LLI included 4 countries, 19 Brazilian states, and 18 municipalities of RJ state. The Brazilian states with the highest density of cases were Amazonas (n = 32), Bahia (n = 18), and Ceará (n = 15). Conclusions/Significance This work is the first contribution to the knowledge of the routes of Leishmania species introduced in RJ state by migrants and travelers patients. L. (V.) braziliensis, L. (V.) guyanensis, L. (V.) naiffi, L. (L.) amazonensis, and genetic variants of L. (V.) braziliensis were identified in RJ state. To determine whether the autochthonous transmission of these imported species is possible it is necessary the adaptation of these species to environmental conditions as well as the presence of reservoirs and phlebotomine vectors in this region. Leishmaniasis is one of the most important neglected parasitic diseases in humans worldwide. American Tegumentary Leishmaniasis (ATL) is a disease caused by protozoa of the genus Leishmania, which are injected into the skin by small insects known by sandflies. Many different Leishmania species may cause ATL, which can affect the skin and/or oral and nasal mucosa. In this study, we analyzed flows between the likely location of infection (LLI) and the place of residence (PR) in Rio de Janeiro (RJ) state and identified Leishmania species isolated from travelers and migrants attended between 2000 and 2015 in a reference hospital for the care of patients with ATL. This work is the first contribution to knowledge about the routes of Leishmania species introduced to RJ state by migrant and traveling patients. In addition to Leishmania (Viannia) braziliensis, which was the most common species, other species have also been introduced to RJ state, including L. (V.) guyanensis, L. (V.) naiffi, L. (Leishmania) amazonensis, and genetic variants of L. (V.) braziliensis. Knowledge of the migratory flow and geographic location of these imported Leishmania species may contribute to the surveillance and control of ATL in RJ state, Brazil.
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Affiliation(s)
- Luciana de Freitas Campos Miranda
- Laboratório de Pesquisa Clínica e Vigilância em Leishmanioses, Instituto Nacional de Infectologia Evandro Chagas, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brazil
- * E-mail:
| | - Raquel da Silva Pacheco
- Laboratório de Pesquisa Clínica e Vigilância em Leishmanioses, Instituto Nacional de Infectologia Evandro Chagas, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brazil
| | - Maria Inês Fernandes Pimentel
- Laboratório de Pesquisa Clínica e Vigilância em Leishmanioses, Instituto Nacional de Infectologia Evandro Chagas, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brazil
| | - Mariza de Matos Salgueiro
- Laboratório de Pesquisa Clínica e Vigilância em Leishmanioses, Instituto Nacional de Infectologia Evandro Chagas, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brazil
| | - Aline Fagundes da Silva
- Laboratório de Pesquisa Clínica e Vigilância em Leishmanioses, Instituto Nacional de Infectologia Evandro Chagas, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brazil
| | - Cíntia Xavier de Mello
- Laboratório Interdisciplinar de Pesquisas Médicas, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brazil
| | | | - Claudia Maria Valete-Rosalino
- Laboratório de Pesquisa Clínica e Vigilância em Leishmanioses, Instituto Nacional de Infectologia Evandro Chagas, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brazil
| | - Maria de Fátima Madeira
- Laboratório de Pesquisa Clínica e Vigilância em Leishmanioses, Instituto Nacional de Infectologia Evandro Chagas, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brazil
| | | | - Armando de Oliveira Schubach
- Laboratório de Pesquisa Clínica e Vigilância em Leishmanioses, Instituto Nacional de Infectologia Evandro Chagas, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brazil
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15
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Brilhante AF, Lima L, Zampieri RA, Nunes VLB, Dorval MEC, Malavazi PFNDS, Melchior LAK, Ishikawa EAY, Cardoso CDO, Floeter-Winter LM, Teixeira MMG, Galati EAB. Leishmania (Viannia) braziliensis type 2 as probable etiological agent of canine cutaneous leishmaniasis in Brazilian Amazon. PLoS One 2019; 14:e0216291. [PMID: 31039202 PMCID: PMC6490954 DOI: 10.1371/journal.pone.0216291] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2018] [Accepted: 04/17/2019] [Indexed: 12/22/2022] Open
Abstract
Canine cutaneous leishmaniasis (CCL) is a zoonosis of public health interest, and in the Americas, Leishmania (Viannia) braziliensis has been identified as the main etiological agent. The present study sought to investigate Leishmania spp. infection in domestic dogs from a rural area of the Xapuri municipality, Acre state, Brazilian Amazonia. For this purpose, visits were carried out to domiciles where the human cases of American cutaneous leishmaniasis (ACL) occurred, followed by the clinical evaluation of the animals in search of clinical signs suggestive of CCL. Blood samples were collected from 40 dogs, 13 of which had lesions suggestive of CCL, and biopsies of these lesions were performed. The methods used were Neal, Novy, and Nicolle’s (NNN) medium cultures and direct parasitological examination. Further, to detect and characterize Leishmania DNA some molecular techniques were performed such as conventional polymerase chain reaction (PCR) and sequencing targeting SSU rDNA and ITS1, restriction fragment length polymorphism (RFLP) and high resolution melting (HRM) analysis targeting hsp70. The investigation revealed that the results obtained from the parasitological methods were negative. In PCR by ITS1 and network topology sequences, six strains from dogs, isolated from the Peruvian Andes, appeared identical to Leishmania (Viannia) braziliensis type 2 (99–100%). By other molecular methods these samples turned out to be positive to Leishmania (Viannia) sp.. The diagnosis of Leishmania in domestic dogs from Acre state showed a high proportion of infected animals, and the occurrence of L. braziliensis type 2 in Brazil for the first time. This new report suggests that L. braziliensis type 2 is both trans- and cis-Andean. However, more studies are needed regarding the clinical and diagnostic aspects of this species of Leishmania.
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Affiliation(s)
- Andreia Fernandes Brilhante
- Faculty of Public Health, University of São Paulo, São Paulo, Brazil
- Federal University of Acre, Rio Branco, Acre, Brazil
- * E-mail:
| | - Luciana Lima
- Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
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Rojas-Jaimes J, Rojas-Palomino N, Pence J, Lescano AG. Leishmania species in biopsies of patients with different clinical manifestations identified by high resolution melting and nested PCR in an Endemic district in Peru. Parasite Epidemiol Control 2019; 4:e00095. [PMID: 30847411 PMCID: PMC6378838 DOI: 10.1016/j.parepi.2019.e00095] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Revised: 01/10/2019] [Accepted: 02/09/2019] [Indexed: 12/01/2022] Open
Abstract
Background The parasite of the genus Leishmania causes a neglected disease known as leishmaniasis, which has different clinical aspects depending on the species that infects the person and the immune response of the patient. The objective was to determine, using molecular biology, the current circulating species of Leishmania in biopsies of different types of cutaneous leishmaniasis (CL) from the endemic district in the region of “Madre de Dios”, Peru. Methods The study's 19 samples were obtained in the Huepethue district in the “Madre de Dios” region from patients who were diagnosed for suspected leishmaniasis infection with three clinical manifestations. These were analyzed using kDNA-PCR, Nested-PCR and HRM-PCR to identify the genus of an infecting parasite as well as its species. Results kDNA-PCR detected all tests for the genus of Leishmania to be positive, while the Nested-PCR could not detect 20.9% of species (one L. (V.) braziliensis and three L. (V.) amazonensis), and the HRM-PCR detected all species presented in the samples. The most prevalent species was L. (V.) braziliensis (73.7%), and the clinical manifestations were ulcers (63.2%), superficial scabs (5.3%) and diffuse form (5.3%), followed by L. (V.) amazonensis (15.8%), manifesting ulcers (15.6%), and L. (V.) lainsoni (10.5%), manifesting superficial scabs (5.3%) and ulcers (5.3%). L. (V.) braziliensis, L. (V.) amazonensis and L. (V.) lainsoni were detected effectively using HRM-PCR in the samples with different clinical manifestations. Conclusions Highlighting the findings of a high diversity of Leishmania species using High Resolution Melting PCR in biopsies with different clinical manifestations of cutaneous leishmaniasis.
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Affiliation(s)
| | | | - James Pence
- Escuela de Medicina Humana, Universidad Científica del Sur, Lima, Peru
| | - Andres G Lescano
- Facultad de Salud Pública y Administración, Universidad Peruana Cayetano Heredia, Lima, Peru
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Araujo-Pereira TD, Pita-Pereira DD, Moreira RB, Silva-Galdino T, Duarte MPDO, Brazil RP, Britto C. Molecular diagnosis of cutaneous leishmaniasis in an endemic area of Acre State in the Amazonian Region of Brazil. Rev Soc Bras Med Trop 2018; 51:376-381. [DOI: 10.1590/0037-8682-0232-2017] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Accepted: 12/15/2017] [Indexed: 11/21/2022] Open
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Coughlan S, Taylor AS, Feane E, Sanders M, Schonian G, Cotton JA, Downing T. Leishmania naiffi and Leishmania guyanensis reference genomes highlight genome structure and gene evolution in the Viannia subgenus. ROYAL SOCIETY OPEN SCIENCE 2018; 5:172212. [PMID: 29765675 PMCID: PMC5936940 DOI: 10.1098/rsos.172212] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Accepted: 03/21/2018] [Indexed: 06/08/2023]
Abstract
The unicellular protozoan parasite Leishmania causes the neglected tropical disease leishmaniasis, affecting 12 million people in 98 countries. In South America, where the Viannia subgenus predominates, so far only L. (Viannia) braziliensis and L. (V.) panamensis have been sequenced, assembled and annotated as reference genomes. Addressing this deficit in molecular information can inform species typing, epidemiological monitoring and clinical treatment. Here, L. (V.) naiffi and L. (V.) guyanensis genomic DNA was sequenced to assemble these two genomes as draft references from short sequence reads. The methods used were tested using short sequence reads for L. braziliensis M2904 against its published reference as a comparison. This assembly and annotation pipeline identified 70 additional genes not annotated on the original M2904 reference. Phylogenetic and evolutionary comparisons of L. guyanensis and L. naiffi with 10 other Viannia genomes revealed four traits common to all Viannia: aneuploidy, 22 orthologous groups of genes absent in other Leishmania subgenera, elevated TATE transposon copies and a high NADH-dependent fumarate reductase gene copy number. Within the Viannia, there were limited structural changes in genome architecture specific to individual species: a 45 Kb amplification on chromosome 34 was present in all bar L. lainsoni, L. naiffi had a higher copy number of the virulence factor leishmanolysin, and laboratory isolate L. shawi M8408 had a possible minichromosome derived from the 3' end of chromosome 34. This combination of genome assembly, phylogenetics and comparative analysis across an extended panel of diverse Viannia has uncovered new insights into the origin and evolution of this subgenus and can help improve diagnostics for leishmaniasis surveillance.
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Affiliation(s)
- Simone Coughlan
- School of Mathematics, Applied Mathematics and Statistics, National University of Ireland, Galway, Republic of Ireland
| | - Ali Shirley Taylor
- School of Biotechnology, Dublin City University, Dublin, Republic of Ireland
| | - Eoghan Feane
- School of Biotechnology, Dublin City University, Dublin, Republic of Ireland
| | | | | | | | - Tim Downing
- School of Mathematics, Applied Mathematics and Statistics, National University of Ireland, Galway, Republic of Ireland
- School of Biotechnology, Dublin City University, Dublin, Republic of Ireland
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de Ávila MM, Brilhante AF, de Souza CF, Bevilacqua PD, Galati EAB, Brazil RP. Ecology, feeding and natural infection by Leishmania spp. of phlebotomine sand flies in an area of high incidence of American tegumentary leishmaniasis in the municipality of Rio Branco, Acre, Brazil. Parasit Vectors 2018; 11:64. [PMID: 29373995 PMCID: PMC5787322 DOI: 10.1186/s13071-018-2641-y] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Accepted: 01/12/2018] [Indexed: 03/28/2023] Open
Abstract
BACKGROUND Phlebotomine sand flies (Diptera: Psychodidae) are insects of medical importance due to their involvement in the zoonotic transmission of Leishmania spp. to vertebrates. The aim of this work was to study the ecology of the sand fly fauna of two types of environments, a rural environment (the Transacreana Road) and an urban park (Horto Florestal Park), both located in the municipality of Rio Branco in the state of Acre, Brazil. Additionally, this study intended to investigate Leishmania infection and blood meal sources of these sand flies using molecular techniques. METHODS The sand fly fauna was studied in different environments (i.e. forest and peridomestic environments in a rural area, and an urban forest) using Shannon traps and HP light traps to collect sand fly specimens over 13 consecutive months (December 2014 to January 2016). For investigating natural infection by Leishmania and the source of sand fly blood meals, DNA samples were extracted from female sand flies and subjected to polymerase chain reaction targeting ITS1 and cytb genes. DNA sequencing was subsequently used to identify species of Leishmania and the source of blood meals. RESULTS A total of 2515 individual sand flies of 43 species were collected and identified, Trichophoromyia auraensis (839; 33.35%), Trichophoromyia spp. (537; 21.35%) and Evandromyia saulensis (187; 7.43%) were more abundant in the rural area (S = 41 species) than in the urban forest. No significant differences were found in species richness between forest and peridomestic environments in the rural area (H = 0.04; P > 0.05), but a larger number of species was found in the forest. Leishmania DNA was sequenced in 13 samples, confirming the presence of L. (V.) braziliensis in Th. auraensis (n = 1), Ev. saulensis (n = 2), Ev. walkeri (n = 1), Ps. llanosmartinsi (n = 1), Pi. nevesi (n = 2), Ps. davisi (n = 1), Ps. ayrozai (n = 1), Pa. aragaoi (n = 1), Ny. antunesi (n = 1) and Ev. infraspinosa (n = 1). Only Ps. ayrozai possessed a sequence similar to that of L. (V.) guyanensis (99%). Through microscopic analysis, five specimens of Ev. saulensis were found to possess flagellate forms in the hindgut, with an infection rate of 2.4%. Samples from 33 fed females were submitted to cytb gene amplification, for which sequencing determined that all were similar to the sequence deposited on GenBank for Gallus gallus (domestic chicken). CONCLUSIONS The high abundance of Trichophoromyia auraensis and Ev. saulensis, and the detection of L. (V.) braziliensis DNA, suggests that both species may be vectors of American tegumentary leishmaniasis. Psychodopygus ayrozai was found to be infected by L. (V) braziliesnsis and L. (V.) guyanensis, and although collected in low abundance, it may be a potential vector in the region. The sand fly fauna was found to be rich and diverse with predominance of the genus Psychodopygus. Identification of food sources of fed females showed that 100% amplified a gene region compatible with the domestic chicken, which although considered refractory in the disease transmission cycle, may have an influence on the population dynamics of sand flies.
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Gosch CS, Marques CP, Resende BS, Souza JDS, Rocha RADS, Lopes DSS, Gosch MS, Dias FR, Dorta ML. American tegumentary leishmaniasis: epidemiological and molecular characterization of prevalent Leishmania species in the State of Tocantins, Brazil, 2011-2015. Rev Inst Med Trop Sao Paulo 2017; 59:e91. [PMID: 29267599 PMCID: PMC5738997 DOI: 10.1590/s1678-9946201759091] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Accepted: 11/07/2017] [Indexed: 11/29/2022] Open
Abstract
Determination of the epidemiological profile of the American tegumentary
leishmaniasis (ATL) and identification of Leishmania species that
are prevalent in the State of Tocantins were carried out through a retrospective and
descriptive study based on data reported in SINAN, in the period from 2011 to 2015.
Molecular techniques such as PCR-RFLP and PCR-G6PD to amplify
Leishmania DNA were performed on stored on Giemsa-stained slides
from lesion scarifications of ATL patients who were amastigote-positive by the direct
microscopic examination. There were 1,434 ATL cases in Tocantins reported in this
period. The highest incidence was reported in men aged over 60 years, rural
residents, the most affected ethnic group was mixed ethnicity (mixed black and white)
and the ones with lower education. The predominant clinical form was cutaneous, being
diagnosed mainly by laboratory methods. Pentavalent antimonial was effective in
resolving cases. The predominant species found in 271 analyzed samples from 32
municipalities located in 8 different health regions of Tocantins was
Leishmania (Viannia) braziliensis. Identifying the
epidemiological profile and characterizing the Leishmania spp
species on regional level is essential to establish control and prevention behaviors,
minimizing the number of cases and treatment resistance, recurrence and evolution to
mucosal forms.
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Affiliation(s)
- Carina Scolari Gosch
- Faculdade Presidente Antônio Carlos, Porto Nacional, Tocantins, Brazil.,Universidade Federal de Goiás, Goiânia, Goiás, Brazil
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Teles CBG, Santos APDAD, Freitas RA, Oliveira AFJD, Ogawa GM, Rodrigues MS, Pessoa FAC, Medeiros JF, Camargo LMA. Phlebotomine sandfly (Diptera: Psychodidae) diversity and their Leishmania DNA in a hot spot of American Cutaneous Leishmaniasis human cases along the Brazilian border with Peru and Bolivia. Mem Inst Oswaldo Cruz 2017; 0:0. [PMID: 27304023 PMCID: PMC4957494 DOI: 10.1590/0074-02760160054] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Accepted: 05/24/2016] [Indexed: 11/21/2022] Open
Abstract
In this study, we identified the phlebotomine sandfly vectors involved in the transmission of American Cutaneous Leishmaniasis (ACL) in Assis Brasil, Acre, Brazil, which is located on the Brazil-Peru-Bolivia frontier. The genotyping of Leishmania in phlebotomines was performed using polymerase chain reaction (PCR) and PCR-restriction fragment length polymorphism. A total of 6,850 sandflies comprising 67 species were captured by using CDC light traps in rural areas of the municipality. Three sandfly species were found in the state of Acre for the first time: Lutzomyia georgii, Lu. complexa and Lu. evangelistai. The predominant species was Lu. auraensis/Lu. ruifreitasi and Lu. davisi (total 59.27%). 32 of 368 pools were positive for the presence of Leishmania DNA (16 pools corresponding to Lu. davisi, and 16 corresponding to Lu. auraensis/Lu. ruifreitasi), with a minimal infection prevalence of 1.85% in Lu. davisi and 2.05% in Lu. auraensis/Lu. ruifreitasi. The Leishmania species found showed maximum identity with L. (Viannia) guyanensis and L. (V.) braziliensis in both phlebotomine species. Based on these results and similar scenarios previously described along the Brazil/Peru/Bolivia tri-border, the studied area must take into consideration the possibility of Lu. davisi and Lu. auraensis/Lu. ruifreitasi as probable vectors of ACL in this municipality.
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Affiliation(s)
- Carolina Bioni Garcia Teles
- Fundação Oswaldo Cruz, Fundação Oswaldo Cruz, Porto Velho RO , Brasil, Fundação Oswaldo Cruz, Porto Velho, RO, Brasil.,Faculdade São Lucas, Faculdade São Lucas, Porto Velho RO , Brasil, Faculdade São Lucas, Porto Velho, RO, Brasil
| | - Ana Paula de Azevedo Dos Santos
- Universidade Federal de Rondônia, Universidade Federal de Rondônia, Porto Velho RO , Brasil, Universidade Federal de Rondônia, Porto Velho, RO, Brasil
| | - Rui Alves Freitas
- Instituto Nacional de Pesquisas da Amazônia, Instituto Nacional de Pesquisas da Amazônia, Manaus AM , Brasil, Instituto Nacional de Pesquisas da Amazônia, Manaus, AM, Brasil
| | - Arley Faria José de Oliveira
- Fundação Oswaldo Cruz, Fundação Oswaldo Cruz, Instituto Leônidas e Maria Deane, Manaus AM , Brasil, Fundação Oswaldo Cruz, Instituto Leônidas e Maria Deane, Manaus, AM, Brasil
| | - Guilherme Maerschner Ogawa
- Universidade de São Paulo, Universidade de São Paulo, Instituto de Ciências Biomédicas, Monte Negro RO , Brasil, Universidade de São Paulo, Instituto de Ciências Biomédicas, Monte Negro, RO, Brasil
| | - Moreno Souza Rodrigues
- Fundação Oswaldo Cruz, Fundação Oswaldo Cruz, Porto Velho RO , Brasil, Fundação Oswaldo Cruz, Porto Velho, RO, Brasil
| | - Felipe Arley Costa Pessoa
- Fundação Oswaldo Cruz, Fundação Oswaldo Cruz, Instituto Leônidas e Maria Deane, Manaus AM , Brasil, Fundação Oswaldo Cruz, Instituto Leônidas e Maria Deane, Manaus, AM, Brasil
| | - Jansen Fernandes Medeiros
- Fundação Oswaldo Cruz, Fundação Oswaldo Cruz, Porto Velho RO , Brasil, Fundação Oswaldo Cruz, Porto Velho, RO, Brasil
| | - Luís Marcelo Aranha Camargo
- Faculdade São Lucas, Faculdade São Lucas, Porto Velho RO , Brasil, Faculdade São Lucas, Porto Velho, RO, Brasil.,Universidade de São Paulo, Universidade de São Paulo, Instituto de Ciências Biomédicas, Monte Negro RO , Brasil, Universidade de São Paulo, Instituto de Ciências Biomédicas, Monte Negro, RO, Brasil
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de Souza AAA, da Rocha Barata I, das Graças Soares Silva M, Lima JAN, Jennings YLL, Ishikawa EAY, Prévot G, Ginouves M, Silveira FT, Shaw J, dos Santos TV. Natural Leishmania (Viannia) infections of phlebotomines (Diptera: Psychodidae) indicate classical and alternative transmission cycles of American cutaneous leishmaniasis in the Guiana Shield, Brazil. Parasite 2017; 24:13. [PMID: 28508745 PMCID: PMC5432964 DOI: 10.1051/parasite/2017016] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Accepted: 04/17/2017] [Indexed: 11/14/2022] Open
Abstract
From 1996 to 1999 multi-trapping methods (Center of Diseases Control, CDC) light traps, light-baited Shannon traps, and aspiration on tree bases) were used to study the phlebotomine fauna of the "Serra do Navio" region of the Brazilian State of Amapá, which is part of the Guiana Shield. Fifty-three species were identified among 8,685 captured individuals. The following species, associated with the transmission of American cutaneous leishmaniasis in Amazonian Brazil, were captured: Nyssomyia umbratilis (3,388), Psychodopygus squamiventris maripaensis (995), Ny. anduzei (550), Trichophoromyia ubiquitalis (400), Ny. whitmani (291), Ps. paraensis (116), and Bichromomyia flaviscutellata (50). Flagellate infections were detected in 45 flies. Of the 19 parasites isolated in vitro, 15 were Leishmania (Viannia) guyanensis (13 in Ny. umbratilis, 1 in Ny. whitmani, 1 in Ny. anduzei) and three were L. (V.) naiffi (2 in Ps. s. maripaensis, 1 in Ny. anduzei). The results indicate the participation of three phlebotomine species in the transmission of L. (V.) guyanensis and two species in that of L. (V.) naiffi, and show that the same phlebotomine species is involved in the transmission of different Leishmania (Viannia) species in the Guianan/Amazon region. A review of the literature together with the results of the present study, and other published and unpublished results, indicate that eight phlebotomine species potentially participate in the transmission of Leishmania (Viannia) naiffi in Amazonia.
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Affiliation(s)
- Adelson Alcimar Almeida de Souza
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Seção de Parasitologia, Instituto Evandro Chagas (Secretaria de Vigilância em Saúde, Ministério da Saúde) Ananindeua zip code 67.030-000
Pará State Brazil
| | - Iorlando da Rocha Barata
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Seção de Parasitologia, Instituto Evandro Chagas (Secretaria de Vigilância em Saúde, Ministério da Saúde) Ananindeua zip code 67.030-000
Pará State Brazil
| | - Maria das Graças Soares Silva
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Seção de Parasitologia, Instituto Evandro Chagas (Secretaria de Vigilância em Saúde, Ministério da Saúde) Ananindeua zip code 67.030-000
Pará State Brazil
| | - José Aprígio Nunes Lima
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Seção de Parasitologia, Instituto Evandro Chagas (Secretaria de Vigilância em Saúde, Ministério da Saúde) Ananindeua zip code 67.030-000
Pará State Brazil
| | - Yara Lúcia Lins Jennings
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Seção de Parasitologia, Instituto Evandro Chagas (Secretaria de Vigilância em Saúde, Ministério da Saúde) Ananindeua zip code 67.030-000
Pará State Brazil
| | - Edna Aoba Yassui Ishikawa
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Núcleo de Medicina Tropical, Universidade Federal do Pará Belém zip code 66055-240
Pará State Brazil
| | - Ghislaine Prévot
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Département de Médecine, Ecosystèmes Amazoniens et Pathologie Tropicale, EA 3593, Labex CEBA, Université de Guyane zip code 97300
Cayenne French Guiana
| | - Marine Ginouves
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Département de Médecine, Ecosystèmes Amazoniens et Pathologie Tropicale, EA 3593, Labex CEBA, Université de Guyane zip code 97300
Cayenne French Guiana
| | - Fernando Tobias Silveira
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Seção de Parasitologia, Instituto Evandro Chagas (Secretaria de Vigilância em Saúde, Ministério da Saúde) Ananindeua zip code 67.030-000
Pará State Brazil
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Núcleo de Medicina Tropical, Universidade Federal do Pará Belém zip code 66055-240
Pará State Brazil
| | - Jeffrey Shaw
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Instituto de Ciências Biomédicas, Universidade de São Paulo zip code 05508-000
São Paulo Brazil
| | - Thiago Vasconcelos dos Santos
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Seção de Parasitologia, Instituto Evandro Chagas (Secretaria de Vigilância em Saúde, Ministério da Saúde) Ananindeua zip code 67.030-000
Pará State Brazil
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Brilhante AF, Melchior LAK, Nunes VLB, Cardoso CDO, Galati EAB. Epidemiological aspects of American cutaneous leishmaniasis (ACL) in an endemic area of forest extractivist culture in western Brazilian Amazonia. Rev Inst Med Trop Sao Paulo 2017; 59:e12. [PMID: 28423087 PMCID: PMC5398184 DOI: 10.1590/s1678-9946201759012] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Accepted: 02/09/2017] [Indexed: 11/21/2022] Open
Abstract
The study sought to analyze clinical and epidemiological aspects of cutaneous leishmaniasis (CL) in Xapuri, Acre, Brazil. Data from 2008 to 2014 registered in the notification records of the disease of the Information System of the Complaints of Notification (SINAN), and the data of the Information Department of the Unified Health System (DATASUS) available from 2007 to 2013 were used and analyzed in the light of the statistics of the temporal series by the Prais-Winsten method and chi-squared test. A total of 906 cases were registered with 60.2% occurring in men and 39.7% in women. The groups from 0 to 4 years of age (48.0%) and from 5 to 19 years of age (23.3%) were the most affected. Regarding the clinical forms, 77.7% presented CL and 22.3% mucocutaneous leishmaniasis (MCL). Among the 896 cases with information on the diagnostic methods used, Montenegro's skin test predominated (66.4%), with a positive result of 95.8% for CL and 99.3% for MCL. Treatment with N-methylglucamine antimony was performed in 99.4% of the cases, but discontinuously used in the majority of patients. This study presents information which may be used as a tool for the epidemiological surveillance and control of the disease in Xapuri, a region which depends essentially on forest resources and ecological tourism.
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Eco-epidemiological aspects, natural detection and molecular identification of Leishmania spp. in Lutzomyia reburra, Lutzomyia barrettoi majuscula and Lutzomyia trapidoi. BIOMEDICA 2017; 37:83-97. [DOI: 10.7705/biomedica.v37i0.3536] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Indexed: 11/21/2022]
Abstract
Introducción. La provincia de Pichincha, Ecuador, es un área endémica de leishmaniasis cutánea, en donde se han determinado como vectores los flebotomíneos antropofílicos con infección natural por Leishmania spp. Sin embargo, no se ha evaluado el papel en la transmisión de las especies zoofílicas.Objetivo. Evaluar la infección natural por Leishmania en dos especies de flebotomíneos zoofílicos, Lutzomyia reburra y Lu. barrettoi majuscula, y en una antropofílica, Lu. trapidoi, así como la endofagia y la sinantropía de estas especies en el noroccidente de Pichincha.Materiales y métodos. Los flebotomíneos se recolectaron en trampas de luz CDC colocadas en diferentes hábitats y altitudes en sitios que son focos de leishmaniasis cutánea. La infección con Leishmania spp. se detectó en el ADN genómico de hembras de las especies de flebotomíneos de interés. Se amplificó el gen espaciador interno de la transcripción del ARN ribosómico, unidad I (ITS1), y los genes de las topoiso-merasas mitocondrial II (mtTOPOII) y nuclear II (TopoII). Se determinaron los porcentajes de positividad para Leishmania a escala espaciotemporal, la proporción de endofagia y el índice de sinantropía.Resultados. Se determinó la presencia de infección natural por Le. amazonensis en Lu. reburra (9,5 %) y Lu. b. majuscula (23,8 %); en Lu. trapidoi se detectaron Le. amazonensis, Le. brazilienis y Le. naiffi-lainsoni. Los flebotomíneos eran asinantrópicos y con baja endofagia.Conclusión. Se registró por primera vez la presencia de infección natural en Lu. reburra y Lu. barrettoi majuscula por Le. amazonensis, y se demostró la importancia de los flebotomíneos zoofílicos en el mantenimiento del ciclo de transmisión de Leishmania spp. en focos endémicos.
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Salloum T, Khalifeh I, Tokajian S. Detection, molecular typing and phylogenetic analysis of Leishmania isolated from cases of leishmaniasis among Syrian refugees in Lebanon. Parasite Epidemiol Control 2016; 1:159-168. [PMID: 29988171 PMCID: PMC5991828 DOI: 10.1016/j.parepi.2016.02.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2015] [Revised: 02/19/2016] [Accepted: 02/19/2016] [Indexed: 01/06/2023] Open
Abstract
Leishmania is a parasitic protozoan with more than two-dozen species causing the disease leishmaniasis. It is transmitted to humans through the bite of an infected female phlebotomine sand-fly vector. In the past two years the incidence of leishmaniasis has been drastically increasing in Lebanon. This was in parallel with the deterioration of the security in Syria forcing thousands to flee and seek shelter in poorly maintained refugee camps and collective shelters. Cutaneous leishmaniasis (CL) is now considered a public health problem, but its epidemiology has not been fully elucidated. To our knowledge, this is the first study comparing two different molecular methods for the detection and identification of Leishmania tropica in Lebanon. Two molecular typing methods of 39 FFPE Leishmania isolates were used: the ITS1-PCR RFLP and the nested ITS1-5.8S rDNA gene amplification followed by sequencing and phylogenetic analysis. The efficiency of these two techniques in Leishmania identification was compared and the phylogenetic relationships among these isolates were illustrated based on the neighbor-joining (NJ) method. The results were statistically correlated with the parasitic index (PI). The DNA storage in formalin-fixed paraffin embedded (FFPE) tissues was assessed as well. The parasites identified were all L. tropica as determined by both techniques. ITS1-5.8S rDNA gene based typing proved to be more sensitive in the detection of parasites (positive in 69.2% of the isolates) as opposed to the ITS1-PCR RFLP method that was successful in identifying L. tropica in only 43.6% of the isolates. Sequencing and phylogenetic analysis revealed high levels of heterogeneity. A statistically significant correlation was observed between PI and the results of the nested ITS1-5.8S rDNA gene PCR. Genotyping at the species level is essential for monitoring the relative frequency of CL in the Mediterranean area that is correlated to three different Leishmania species (Leishmania infantum, Leishmania major and L. tropica), each characterized by distinct epidemiological features. The obtained results highlight the need to find a universally accepted diagnostic tool for Leishmania typing.
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Key Words
- 5.8S rDNA gene
- Bp, base pair
- CL, cutaneous leishmaniasis
- FFPE, formalin-fixed paraffin embedded
- ITS, internal transcribed spacer
- ITS1
- L. tropica, Leishmania tropica
- Leishmania
- MLST, multilocus sequence typing
- NJ, neighbor-joining
- PCR, polymerase chain reaction
- PI, parasitic index
- RFLP
- RFLP, restriction fragment length polymorphism
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Affiliation(s)
- Tamara Salloum
- Department of Natural Sciences, School of Arts and Sciences, Lebanese American University, Byblos, Lebanon
| | - Ibrahim Khalifeh
- Department of Pathology and Laboratory Medicine, American University of Beirut, Beirut, Lebanon
| | - Sima Tokajian
- Department of Natural Sciences, School of Arts and Sciences, Lebanese American University, Byblos, Lebanon
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Teles CBG, Medeiros JF, Santos APDAD, Freitas LARD, Katsuragawa TH, Cantanhêde LM, Ferreira RDGM, Camarg LMA. MOLECULAR CHARACTERIZATION OF AMERICAN CUTANEOUS LEISHMANIASIS IN THE TRI‑BORDER AREA OF ASSIS BRASIL, ACRE STATE, BRAZIL. Rev Inst Med Trop Sao Paulo 2016; 57:343-7. [PMID: 26422160 PMCID: PMC4616921 DOI: 10.1590/s0036-46652015000400012] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
In this study, Leishmaniaspecies were identified by Polymerase Chain Reaction (PCR). The epidemiology of patients suspected of having American Cutaneous Leishmaniasis in the municipality of Assis Brasil, Acre State, located in the Brazil/Peru/Bolivia triborder was also investigated. By PCR, the DNA of Leishmaniawas detected in 100% of the cases (37 samples) and a PCR-Restriction Fragment Length Polymorphism (RFLP) of the hsp 70gene identified the species in 32 samples: Leishmania (Viannia) braziliensis (65.6%) , L. (V.) shawi (28.1%) , L. (V.) guyanensis (3.1%) and mixed infection L. (V.) guyanensis and L. (Leishmania) amazonensis (3.1%)This is the first report of L. (V.) shawiand L. (L.) amazonensis in Acre. The two predominant species were found in patients living in urban and rural areas. Most cases were found in males living in rural areas for at least three years and involved in rural work. This suggests, in most cases, a possible transmission of the disease from a rural/forest source, although some patients had not engaged in activities associated with permanence in forestall areas, which indicate a possible sandflies adaptation to the periurban setting.
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Ferreira TDS, Minuzzi-Souza TTC, Andrade AJD, Coelho TO, Rocha DDA, Obara MT, Hecht M, Nitz N, Gurgel-Gonçalves R. Molecular detection of Trypanosoma sp. and Blastocrithidia sp. (Trypanosomatidae) in phlebotomine sand flies (Psychodidae) in the Federal District of Brazil. Rev Soc Bras Med Trop 2016; 48:776-9. [PMID: 26676507 DOI: 10.1590/0037-8682-0076-2015] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2015] [Accepted: 05/11/2015] [Indexed: 11/22/2022] Open
Abstract
INTRODUCTION This study describes the occurrence of trypanosomatids in phlebotomines in Brasília, Brazil. METHODS Two hundred and ten females of 13 sand fly species were analyzed by polymerase chain reaction (PCR) using different molecular markers (D7 24Sα rRNA, kDNA, and ITS1) and sequencing. RESULTS PCR revealed trypanosomatid-positive samples from Nyssomyia whitmani and Evandromyia evandroi, which were negative by kDNA and ITS1 Leishmania-specific PCRs. DNA sequence analysis of D7 24Sα rRNA amplicons indicated the occurrence of Blastocrithidia sp. and Trypanosoma sp. in Nyssomyia whitmani and Evandromyia evandroi, respectively. CONCLUSIONS Two trypanosomatid species other than Leishmania sp. were found to circulate in sand flies in Central Brazil.
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Affiliation(s)
- Tauana de Sousa Ferreira
- Laboratório de Parasitologia Médica e Biologia de Vetores, Faculdade de Medicina, Universidade de Brasília, Brasília, Distrito Federal, Brazil
| | - Thaís Tâmara Castro Minuzzi-Souza
- Laboratório de Parasitologia Médica e Biologia de Vetores, Faculdade de Medicina, Universidade de Brasília, Brasília, Distrito Federal, Brazil
| | - Andrey José de Andrade
- Laboratório de Parasitologia Médica e Biologia de Vetores, Faculdade de Medicina, Universidade de Brasília, Brasília, Distrito Federal, Brazil
| | - Thais Oliveira Coelho
- Laboratório de Parasitologia Médica e Biologia de Vetores, Faculdade de Medicina, Universidade de Brasília, Brasília, Distrito Federal, Brazil
| | - Douglas de Almeida Rocha
- Laboratório de Parasitologia Médica e Biologia de Vetores, Faculdade de Medicina, Universidade de Brasília, Brasília, Distrito Federal, Brazil
| | - Marcos Takashi Obara
- Faculdade de Ceilândia, Universidade de Brasília, Ceilândia, Distrito Federal, Brazil
| | - Mariana Hecht
- Laboratório Interdisciplinar de Biociências, Faculdade de Medicina, Universidade de Brasília, Brasília, Distrito Federal, Brazil
| | - Nadjar Nitz
- Laboratório Interdisciplinar de Biociências, Faculdade de Medicina, Universidade de Brasília, Brasília, Distrito Federal, Brazil
| | - Rodrigo Gurgel-Gonçalves
- Laboratório de Parasitologia Médica e Biologia de Vetores, Faculdade de Medicina, Universidade de Brasília, Brasília, Distrito Federal, Brazil
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Espir TT, Guerreiro TS, Naiff MDF, Figueira LDP, Soares FV, da Silva SS, Franco AMR. Evaluation of different diagnostic methods of American Cutaneous Leishmaniasis in the Brazilian Amazon. Exp Parasitol 2016; 167:1-6. [PMID: 27119738 DOI: 10.1016/j.exppara.2016.04.010] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2015] [Revised: 04/08/2016] [Accepted: 04/18/2016] [Indexed: 11/28/2022]
Abstract
Epidemiological studies have been conducted to better understand the dynamics of American Cutaneous Leishmaniasis (ACL) in the Amazon region where distinct species of Leishmania circulate. In endemic areas, the optimal diagnosis must be made in the earlier clinical presentation to avoid the complications of chronic disease. The scarcity of financial support, laboratory infrastructure and trained persons are the major obstacles in this reality. This paper describes the result of performing different diagnostic methods for ACL in Amazonas State between the years 2010 and 2011. The tests used were the intradermal skin test (Montenegro's skin test), ELISA (Enzyme-Linked Immunosorbent Assay), direct examination, culture isolation and identification of Leishmania species. A total of 38 suspected human cases of ACL were diagnosed by different methods, of which 71.0% (n = 27) were positive by direct examination, 75.6% (n = 28) had positivity in the culture isolates and, of these, 54.0% (n = 19) had infection with Leishmania (Viannia) guyanensis. The positivity of the intradermal skin test with the leishmanin solution was observed in 77.0% of cases analyzed and the serology with detection of IgG and IgM showed the presence of antibodies in 100% of exams realized results, showing variation in the titles of antibodies. The success of Leishmaniasis treatment depends on an effective and early diagnosis. Parasitological diagnosis is highly specific, but sensitivity is subject to variation because the tissue distribution of parasites generally is not homogeneous and depends on the specie of parasite. Moreover, parasitological tests require invasive procedures and depend on restrictive conditions for the collection of biological sample, which limit their use in large-scale for epidemiological studies. ELISA has been the most widely used serological method for the diagnosis of Visceral Leishmaniasis (VL) as it is easy to perform and has a low cost. However, flaws in specificity are observed in the diagnosis of cutaneous leishmaniasis. Actually the diagnosis needs to be done as an associated methods depending on the question to be solved.
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Affiliation(s)
- Thais Tibery Espir
- Coordenação de Pesquisas em Sociedade, Ambiente e Saúde, CSAS, Laboratório de Leishmaniose e Doença de Chagas, Instituto Nacional de Pesquisas da Amazônia (INPA), 69060-001BR, Avenida André Araújo 2936, 69060-001 Manaus, AM, Brazil; Faculdade de Medicina, Departamento de Saúde Coletiva (FM-DSC), Universidade Federal do Amazonas (UFAM), 60077000 Manaus, AM, Brazil.
| | - Thayanne Sá Guerreiro
- Coordenação de Pesquisas em Sociedade, Ambiente e Saúde, CSAS, Laboratório de Leishmaniose e Doença de Chagas, Instituto Nacional de Pesquisas da Amazônia (INPA), 69060-001BR, Avenida André Araújo 2936, 69060-001 Manaus, AM, Brazil
| | - Maricleide de Farias Naiff
- Coordenação de Pesquisas em Sociedade, Ambiente e Saúde, CSAS, Laboratório de Leishmaniose e Doença de Chagas, Instituto Nacional de Pesquisas da Amazônia (INPA), 69060-001BR, Avenida André Araújo 2936, 69060-001 Manaus, AM, Brazil
| | - Luanda de Paula Figueira
- Coordenação de Pesquisas em Sociedade, Ambiente e Saúde, CSAS, Laboratório de Leishmaniose e Doença de Chagas, Instituto Nacional de Pesquisas da Amazônia (INPA), 69060-001BR, Avenida André Araújo 2936, 69060-001 Manaus, AM, Brazil
| | - Fabiane Veloso Soares
- Coordenação de Pesquisas em Sociedade, Ambiente e Saúde, CSAS, Laboratório de Leishmaniose e Doença de Chagas, Instituto Nacional de Pesquisas da Amazônia (INPA), 69060-001BR, Avenida André Araújo 2936, 69060-001 Manaus, AM, Brazil
| | - Susi Simas da Silva
- Coordenação de Pesquisas em Sociedade, Ambiente e Saúde, CSAS, Laboratório de Leishmaniose e Doença de Chagas, Instituto Nacional de Pesquisas da Amazônia (INPA), 69060-001BR, Avenida André Araújo 2936, 69060-001 Manaus, AM, Brazil
| | - Antonia Maria Ramos Franco
- Coordenação de Pesquisas em Sociedade, Ambiente e Saúde, CSAS, Laboratório de Leishmaniose e Doença de Chagas, Instituto Nacional de Pesquisas da Amazônia (INPA), 69060-001BR, Avenida André Araújo 2936, 69060-001 Manaus, AM, Brazil
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Fagundes-Silva GA, Romero GAS, Cupolillo E, Yamashita EPG, Gomes-Silva A, Guerra JADO, Da-Cruz AM. Leishmania (Viannia) naiffi: rare enough to be neglected? Mem Inst Oswaldo Cruz 2016; 110:797-800. [PMID: 26517660 PMCID: PMC4667584 DOI: 10.1590/0074-02760150128] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2015] [Accepted: 07/14/2015] [Indexed: 11/25/2022] Open
Abstract
In the Brazilian Amazon, American tegumentary leishmaniasis (ATL) is endemic and
presents a wide spectrum of clinical manifestations due, in part, to the circulation
of at least seven Leishmania species. Few reports of
Leishmania (Viannia) naiffi infection suggest that its occurrence
is uncommon and the reported cases present a benign clinical course and a good
response to treatment. This study aimed to strengthen the clinical and
epidemiological importance of L. (V.) naiffi in the Amazon Region
(Manaus, state of Amazonas) and to report therapeutic failure in patients infected
with this species. Thirty Leishmania spp samples isolated from
cutaneous lesions were characterised by multilocus enzyme electrophoresis. As
expected, the most common species was Leishmania (V.) guyanensis (20
cases). However, a relevant number ofL. (V.) naiffi patients (8
cases) was observed, thus demonstrating that this species is not uncommon in the
region. No patient infected withL. (V.) naiffi evolved to
spontaneous cure until the start of treatment, which indicated that this species may
not have a self-limiting nature. In addition, two of the patients experienced a poor
response to antimonial or pentamidine therapy. Thus, either ATL cases due to
L. (V.) naiffi cannot be as uncommon as previously thought or
this species is currently expanding in this region.
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Affiliation(s)
| | | | - Elisa Cupolillo
- Laboratório de Pesquisas em Leishmaniose, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brasil
| | | | - Adriano Gomes-Silva
- Laboratório Interdisciplinar de Pesquisas Médicas, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brasil
| | | | - Alda Maria Da-Cruz
- Laboratório Interdisciplinar de Pesquisas Médicas, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brasil
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Cantanhêde LM, da Silva Júnior CF, Ito MM, Felipin KP, Nicolete R, Salcedo JMV, Porrozzi R, Cupolillo E, Ferreira RDGM. Further Evidence of an Association between the Presence of Leishmania RNA Virus 1 and the Mucosal Manifestations in Tegumentary Leishmaniasis Patients. PLoS Negl Trop Dis 2015; 9:e0004079. [PMID: 26372217 PMCID: PMC4570810 DOI: 10.1371/journal.pntd.0004079] [Citation(s) in RCA: 76] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2014] [Accepted: 08/21/2015] [Indexed: 01/08/2023] Open
Abstract
Tegumentary Leishmaniasis (TL) is endemic in Latin America, and Brazil contributes approximately 20 thousand cases per year. The pathogenesis of TL, however, is still not fully understood. Clinical manifestations vary from cutaneous leishmaniasis (CL) to more severe outcomes, such as disseminated leishmaniasis (DL), mucosal leishmaniasis (ML) and diffuse cutaneous leishmaniasis (DCL). Many factors have been associated with the severity of the disease and the development of lesions. Recent studies have reported that the presence of Leishmania RNA virus 1 infecting Leishmania (Leishmania RNA virus 1, LRV1) is an important factor associated with the severity of ML in experimental animal models. In the present study, 156 patients who attended Rondonia's Hospital of Tropical Medicine with both leishmaniasis clinical diagnoses (109 CL; 38 ML; 5 CL+ML; 3 DL and 1 DCL) and molecular diagnoses were investigated. The clinical diagnosis were confirmed by PCR by targeting hsp70 and kDNA DNA sequences and the species causing the infection were determined by HSP70 PCR-RFPL. The presence of LVR1 was tested by RT-PCR. Five Leishmania species were detected: 121 (77.6%) samples were positive for Leishmania (Viannia) braziliensis, 18 (11.5%) were positive for Leishmania (V.) guyanensis, 3 (1.8%) for Leishmania (V.) lainsoni, 2 (1.3%) for Leishmania (Leishmania) amazonensis and 2 (1.3%) for Leishmania (V.) shawi. Six (3.9%) samples were positive for Leishmania sp. but the species could not be determined, and 4 (2.6%) samples were suggestive of mixed infection by L. (V.) braziliensis and L. (V.) guyanensis. The virus was detected in L. braziliensis (N = 54), L. guyanensis (N = 5), L. amazonensis (N = 2), L. lainsoni (N = 1) and inconclusive samples (N = 6). Patients presenting with CL+ML, DL and DCL were excluded from further analysis. Association between the presence of the virus and the disease outcome were tested among the remaining 147 patients (CL = 109 and ML = 38). Of them, 71.1% (n = 27) mucosal lesions were positive for LRV1, and 28.9% (n = 11) were negative. In cutaneous lesions, 36.7% (n = 40) were positive and 63.3% (n = 69) were negative for LRV1. The ratio P(ML|LRV1+)/P(ML|LRV1-) was 2.93 (CI95% 1.57…5.46; p<0.001), thus corroborating the hypothesis of the association between LRV1 and the occurrence of mucosal leishmaniasis, as previously described in animal models; it also indicates that LRV1 is not the only factor contributing to the disease outcome. Leishmaniasis is an infectious disease caused by protozoa of the genus Leishmania. Tegumentary Leishmaniasis (TL) is characterized by a variety of clinical forms, ranging from simple skin lesions to more severe lesions with mucosal destruction. The mechanisms by which some patients develop a severe form of the disease remain unclear. It is already known that the immune statuses of the host and parasite species are key factors influencing the clinical outcome of the disease, but is not known which are the factors that influence the parasite’s tropism to the mucosal regions. Recently, a virus found infecting Leishmania, Leishmania RNA virus 1 (LRV1), has also been reported as one important factor contributing to the disease severity. The present article reports, among 147 investigated patients from the Brazilian Western Amazon, a higher frequency of LRV1 among patients with mucosal lesions compared to patients with cutaneous lesions, statistically demonstrating that the virus is related to the worsening of the disease, increasing the risk of developing mucosal injury by almost 3 times.
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Affiliation(s)
| | | | - Marcos Massayuki Ito
- Secretaria de Saúde, Governo do Estado de Rondonia, Porto Velho, Rondonia, Brazil
| | | | - Roberto Nicolete
- Fundação Oswaldo Cruz, Unidade Rondonia, Porto Velho, Rondonia, Brazil
| | | | - Renato Porrozzi
- Laboratório de Pesquisa em Leishmaniose, Instituto Oswaldo Cruz, Rio de Janeiro, Brazil
| | - Elisa Cupolillo
- Laboratório de Pesquisa em Leishmaniose, Instituto Oswaldo Cruz, Rio de Janeiro, Brazil
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Abstract
Leishmania is an infectious protozoan parasite related to African and American trypanosomes. All Leishmania species that are pathogenic to humans can cause dermal disease. When one is confronted with cutaneous leishmaniasis, identification of the causative species is relevant in both clinical and epidemiological studies, case management, and control. This review gives an overview of the currently existing and most used assays for species discrimination, with a critical appraisal of the limitations of each technique. The consensus taxonomy for the genus is outlined, including debatable species designations. Finally, a numerical literature analysis is presented that describes which methods are most used in various countries and regions in the world, and for which purposes.
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Affiliation(s)
- Gert Van der Auwera
- Institute of Tropical Medicine, Department of Biomedical Sciences, Antwerp, Belgium
| | - Jean-Claude Dujardin
- Institute of Tropical Medicine, Department of Biomedical Sciences, Antwerp, Belgium Antwerp University, Department of Biomedical Sciences, Antwerp, Belgium
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Pereira Júnior AM, Teles CBG, de Azevedo dos Santos AP, de Souza Rodrigues M, Marialva EF, Pessoa FAC, Medeiros JF. Ecological aspects and molecular detection of Leishmania DNA Ross (Kinetoplastida: Trypanosomatidae) in phlebotomine sandflies (Diptera: Psychodidae) in terra firme and várzea environments in the Middle Solimões Region, Amazonas State, Brazil. Parasit Vectors 2015; 8:180. [PMID: 25889808 PMCID: PMC4378226 DOI: 10.1186/s13071-015-0789-2] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2014] [Accepted: 03/07/2015] [Indexed: 12/03/2022] Open
Abstract
Background Phlebotomine sand flies (Diptera: Psychodidae) are insects of medical importance due to the role that some species play in the transmission of leishmaniasis. This work aimed to study some ecological aspects among sand flies fauna inhabiting two different environments: the várzea (lowland Amazonian forest) and terra firme (upland Amazonian forest), both located in Tefé Municipality, Amazonas State, Braziland to detect Leishmania infection in those phlebotomine populations. Methods Sand flies were collected using HP light traps. Collection took place over the course of six months: January, February, April, August, September, and October of 2013. To detect natural infection by Leishmania, DNA samples were extracted from female sand flies and submitted to Polymerase Chain Reaction (PCR) targeting the kDNA gene; Leishmania species were identified by PCR-RFLP targeting the hsp70 gene and genetic sequencing. Results In all, 5,716 individuals were collected, and 46 species were identified. Trichophoromyia ubiquitalis (3,330 – 58.26%) and Nyssomyia antunesi (661 – 11.26%) were the most abundant species. Species richness was greater in terra firme environments (42 species) than in the várzea environments (22 species), and forests ecotopes (43 species) were richer than peridomiciles (28 species). DNA of Leishmania was found in Th. ubiquitalis and Psychodopygus davisi, both of which inhabit the terra firme environment and sequencing analysis confirmed the presence of Leishmania (Viannia) lainsoni DNA in Th. ubiquitalis in Tefé Municipality. Conclusions The high abundance of Th. ubiquitalis and Ps. davisi and detection of DNA of Leishmania sp. may indicate that both species could be putative vectors for American Cutaneous Leishmaniasis (ACL) in the terra firme environment of Tefé. The sand fly fauna found in várzea is rich and diverse, exhibiting several species, nevertheless the seasonal hydric stress during part of the year that could influence the local diversity, if compared with other studies. This is the first report in Amazonas State of Th. ubiquitalis with presence of L. (V.) lainsoni DNA.
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Affiliation(s)
| | - Carolina Bioni Garcia Teles
- Laboratório de Ecologia de Doenças Transmissíveis da Amazônia (EDTA) - Centro de Pesquisa Leônidas e Maria Deane - Fiocruz Amazônia, Manaus, Amazonas, Brazil.
| | - Ana Paula de Azevedo dos Santos
- Laboratório de Ecologia de Doenças Transmissíveis da Amazônia (EDTA) - Centro de Pesquisa Leônidas e Maria Deane - Fiocruz Amazônia, Manaus, Amazonas, Brazil.
| | | | - Eric Fabrício Marialva
- Laboratório de Ecologia de Doenças Transmissíveis da Amazônia (EDTA) - Centro de Pesquisa Leônidas e Maria Deane - Fiocruz Amazônia, Manaus, Amazonas, Brazil.
| | - Felipe Arley Costa Pessoa
- Laboratório de Ecologia de Doenças Transmissíveis da Amazônia (EDTA) - Centro de Pesquisa Leônidas e Maria Deane - Fiocruz Amazônia, Manaus, Amazonas, Brazil.
| | - Jansen Fernandes Medeiros
- Laboratório de Ecologia de Doenças Transmissíveis da Amazônia (EDTA) - Centro de Pesquisa Leônidas e Maria Deane - Fiocruz Amazônia, Manaus, Amazonas, Brazil. .,Laboratório de Entomologia - Fiocruz Rondônia, Porto Velho, Rondônia, Porto Velho, Rondônia, Brazil.
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Cardoso RM, de Araújo NNSL, Romero GAS, Souza TTCM, Dietrich AG, Mendes JD, Reis ML, Ferreira JBC, Hecht MM, Gurgel-Gonçalves R. Expanding the knowledge about Leishmania species in wild mammals and dogs in the Brazilian savannah. Parasit Vectors 2015; 8:171. [PMID: 25889365 PMCID: PMC4386096 DOI: 10.1186/s13071-015-0780-y] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2014] [Accepted: 03/04/2015] [Indexed: 11/12/2022] Open
Abstract
Background Wild, synanthropic and domestic mammals act as hosts and/or reservoirs of several Leishmania spp. Studies on possible reservoirs of Leishmania in different areas are fundamental to understand host-parasite interactions and develop strategies for the surveillance and control of leishmaniasis. In the present study, we evaluated the Leishmania spp. occurrence in mammals in two conservation units and their surroundings in Brasília, Federal District (FD), Brazil. Methods Small mammals were captured in Brasília National Park (BNP) and Contagem Biological Reserve (CBR) and dogs were sampled in residential areas in their vicinity. Skin and blood samples were evaluated by PCR using different molecular markers (D7 24Sα rRNA and rDNA ITS1). Leishmania species were identified by sequencing of PCR products. Dog blood samples were subjected to the rapid immunochromatographic test (DPP) for detection of anti-Leishmania infantum antibodies. Results 179 wild mammals were studied and 20.1% had Leishmania DNA successfully detected in at least one sample. Six mammal species were considered infected: Clyomys laticeps, Necromys lasiurus, Nectomys rattus, Rhipidomys macrurus, Didelphis albiventris and Gracilinanus agilis. No significant difference, comparing the proportion of individuals with Leishmania spp., was observed between the sampled areas and wild mammal species. Most of the positive samples were collected from the rodent N. lasiurus, infected by L. amazonensis or L. braziliensis. Moreover, infections by Trypanosoma spp. were detected in N. lasiurus and G. agilis. All 19 dog samples were positive by DPP; however, only three (15.8%) were confirmed by PCR assays. DNA sequences of ITS1 dog amplicons showed 100% identity with L. infantum sequence. Conclusions The results suggest the participation of six species of wild mammals in the enzootic transmission of Leishmania spp. in FD. This is the first report of L. amazonensis in N. lasiurus. Electronic supplementary material The online version of this article (doi:10.1186/s13071-015-0780-y) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Rebecca Martins Cardoso
- Núcleo de Medicina Tropical, Faculdade de Medicina, Universidade de Brasília, 70904970, Distrito Federal, Brasília, Brazil.
| | - Nadjar Nitz Silva Lociks de Araújo
- Laboratório Multidisciplinar de Pesquisa em Doença de Chagas, Faculdade de Medicina, Universidade de Brasília, 70904970, Distrito Federal, Brasília, Brazil.
| | - Gustavo Adolfo Sierra Romero
- Núcleo de Medicina Tropical, Faculdade de Medicina, Universidade de Brasília, 70904970, Distrito Federal, Brasília, Brazil.
| | - Thaís Tâmara Castro Minuzzi Souza
- Laboratório de Parasitologia Médica e Biologia de Vetores, Faculdade de Medicina, Universidade de Brasília, 70904970, Distrito Federal, Brasília, Brazil.
| | - Ana Gabriela Dietrich
- Laboratório de Parasitologia Médica e Biologia de Vetores, Faculdade de Medicina, Universidade de Brasília, 70904970, Distrito Federal, Brasília, Brazil.
| | - Júnio Donizette Mendes
- Núcleo de Medicina Tropical, Faculdade de Medicina, Universidade de Brasília, 70904970, Distrito Federal, Brasília, Brazil.
| | - Marcelo Lima Reis
- Instituto Chico Mendes de Conservação da Biodiversidade, 70670350, Distrito Federal, Brasília, Brazil.
| | - Jônatas Barbosa Cavalcante Ferreira
- Laboratório de Parasitologia Médica e Biologia de Vetores, Faculdade de Medicina, Universidade de Brasília, 70904970, Distrito Federal, Brasília, Brazil.
| | - Mariana Machado Hecht
- Laboratório Multidisciplinar de Pesquisa em Doença de Chagas, Faculdade de Medicina, Universidade de Brasília, 70904970, Distrito Federal, Brasília, Brazil.
| | - Rodrigo Gurgel-Gonçalves
- Laboratório de Parasitologia Médica e Biologia de Vetores, Faculdade de Medicina, Universidade de Brasília, 70904970, Distrito Federal, Brasília, Brazil.
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Araujo-Pereira T, Fuzari AA, Andrade Filho JD, Pita-Pereira D, Britto C, Brazil RP. Sand fly fauna (Diptera: Psychodidae: Phlebotominae) in an area of leishmaniasis transmission in the municipality of Rio Branco, state of Acre, Brazil. Parasit Vectors 2014; 7:360. [PMID: 25103985 PMCID: PMC4141082 DOI: 10.1186/1756-3305-7-360] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2014] [Accepted: 07/19/2014] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Notifications concerning American Cutaneous Leishmaniasis have increased in recent years in the state of Acre, Brazil. Despite identification of distinct Leishmania species isolated from cutaneous lesions, there are still no records of visceral leishmaniasis in the state. However, studies on the sand fly fauna in this region are still limited. FINDINGS Insects were collected from April 2011 to April 2012, using HP light traps distributed in four residential areas and one recreational area in Rio Branco, Capital of the State of Acre in the Amazon region of Brazil. A total of 456 sand flies were collected, comprising 256 females and 200 males. Taxonomic identification revealed 16 Phlebotominae genera and 23 species, as follows: Trichophoromyia auraensis, Nyssomyia whitmani, Nyssomyia antunesi, Pressatia choti, Evandromyia saulensis, Evandromyia walkeri, Evandromyia begonae, Migonemyia migonei, Pintomyia serrana, Psychodopygus paraensis, Sciopemyia sordelii, Migonemyia pusilla, Pintomyia nevesi, Brumptomyia avellari, Micropygomyia acanthopharynx, Micropygomyia micropyga, Pintomyia odax, Lutzomyia sherlocki, Pressatia calcarata, Pressatia duncanae, Bichromomyia flaviscutellata, Evandromyia bourrouli and Evandromyia bacula. From this group, Tr. auraensis and Ny. whitmani were the most abundant species in both forested areas and the peridomiciliary environment. CONCLUSIONS We find that the sand fly fauna in the urban and peri urban areas of Rio Branco is very diverse comprising 23 species, as diverse as that in areas of primary forest. Some species, such as Nyssomyia whitmani, Ny. antunesi and Bichromomyia flaviscutellata are known vectors of parasites responsible for cutaneous leishmaniasis, and Trichophoromyia auraensis is a putative vector in this Amazonian region.
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Affiliation(s)
| | | | | | | | | | - Reginaldo P Brazil
- Laboratório de Doenças Parasitárias, Instituto Oswaldo Cruz - Fiocruz, Av, Brasil 4365, Rio de Janeiro 21040-900, Brazil.
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Jennings YL, de Souza AAA, Ishikawa EA, Shaw J, Lainson R, Silveira F. Phenotypic characterization of Leishmania spp. causing cutaneous leishmaniasis in the lower Amazon region, western Pará state, Brazil, reveals a putative hybrid parasite, Leishmania (Viannia) guyanensis × Leishmania (Viannia) shawi shawi. ACTA ACUST UNITED AC 2014; 21:39. [PMID: 25083790 PMCID: PMC4118625 DOI: 10.1051/parasite/2014039] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2014] [Accepted: 07/14/2014] [Indexed: 11/14/2022]
Abstract
We phenotypically characterized 43 leishmanial parasites from cutaneous leishmaniasis by isoenzyme electrophoresis and the indirect immunofluorescence antibody test (23 McAbs). Identifications revealed 11 (25.6%) strains of Leishmania (V.) braziliensis, 4 (9.3%) of L. (V.) shawi shawi, 7 (16.3%) of L. (V.) shawi santarensis, 6 (13.9%) of L. (V.) guyanensis and L. (V.) lainsoni, 2 (4.7%) of L. (L.) amazonensis, and 7 (16.3%) of a putative hybrid parasite, L. (V.) guyanensis/L. (V.) shawi shawi. McAbs detected three different serodemes of L. (V.) braziliensis: I-7, II-1, and III-3 strains. Among the strains of L. (V.) shawi we identified two populations: one (7 strains) expressing the B19 epitope that was previously considered to be species-specific for L. (V.) guyanensis. We have given this population sub-specific rank, naming it L. (V.) s. santarensis. The other one (4 strains) did not express the B19 epitope like the L. (V.) shawi reference strain, which we now designate as L. (V.) s. shawi. For the first time in the eastern Brazilian Amazon we register a putative hybrid parasite (7 strains), L. (V.) guyanensis/L. (V.) s. shawi, characterized by a new 6PGDH three-band profile at the level of L. (V.) guyanensis. Its PGM profile, however, was very similar to that of L. (V.) s. shawi. These results suggest that the lower Amazon region – western Pará state, Brazil, represents a biome where L. (V.) guyanensis and L. (V.) s. shawi exchange genetic information.
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Affiliation(s)
- Yara Lins Jennings
- Parasitology Department, Institute Evandro Chagas (Surveillance Secretary of Health, Ministry of Health), Belém, Pará state, Brazil
| | - Adelson Alcimar Almeida de Souza
- Parasitology Department, Institute Evandro Chagas (Surveillance Secretary of Health, Ministry of Health), Belém, Pará state, Brazil
| | - Edna Aoba Ishikawa
- Tropical Medicine Nucleus, Federal University of Pará, Belém, Pará state, Brazil
| | - Jeffrey Shaw
- Biomedical Sciences Institute, São Paulo University, São Paulo, São Paulo state, Brazil
| | - Ralph Lainson
- Parasitology Department, Institute Evandro Chagas (Surveillance Secretary of Health, Ministry of Health), Belém, Pará state, Brazil
| | - Fernando Silveira
- Parasitology Department, Institute Evandro Chagas (Surveillance Secretary of Health, Ministry of Health), Belém, Pará state, Brazil - Tropical Medicine Nucleus, Federal University of Pará, Belém, Pará state, Brazil
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Antileishmanial activity of medicinal plants used in endemic areas in northeastern Brazil. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2014; 2014:478290. [PMID: 25126099 PMCID: PMC4122062 DOI: 10.1155/2014/478290] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/10/2014] [Revised: 06/07/2014] [Accepted: 06/23/2014] [Indexed: 02/06/2023]
Abstract
This study investigates the leishmanicidal activity of five species of plants used in folk medicine in endemic areas of the state of Alagoas, Brazil. Data were collected in the cities of Colonia Leopoldina, Novo Lino, and União dos Palmares, Alagoas state, from patients with cutaneous leishmaniasis (Leishmania amazonensis) who use medicinal plants to treat this disease. Plants extracts were tested at a concentration of 1–100 μg/mL in all experiments, except in an assay to evaluate activity against amastigotes, when 10 μg/mL was used. All plants extracts did not show deleterious activity to the host cell evidenced by LDH assay at 100, 10, and 1 μg/mL after 48 h of incubation. The plants extracts Hyptis pectinata (L.) Poit, Aloe vera L., Ruta graveolens L., Pfaffia glomerata (Spreng.) Pedersen, and Chenopodium ambrosioides L. exhibited direct activity against extracellular forms at 100 μg/mL; these extracts inhibited growth by 81.9%, 82.9%, 74.4%, 88.7%, and 87.4%, respectively, when compared with promastigotes. The plants extracts H. pectinata, A. vera, and R. graveolens also significantly diminished the number of amastigotes at 10 μg/mL, inhibiting growth by 85.0%, 40.4%, 94.2%, and 97.4%, respectively, when compared with control. Based on these data, we conclude that the five plants exhibited considerable leishmanicidal activity.
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Kuhls K, Cupolillo E, Silva SO, Schweynoch C, Côrtes Boité M, Mello MN, Mauricio I, Miles M, Wirth T, Schönian G. Population structure and evidence for both clonality and recombination among Brazilian strains of the subgenus Leishmania (Viannia). PLoS Negl Trop Dis 2013; 7:e2490. [PMID: 24205418 PMCID: PMC3814519 DOI: 10.1371/journal.pntd.0002490] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2012] [Accepted: 09/08/2013] [Indexed: 12/03/2022] Open
Abstract
Background/Objectives: Parasites of the subgenus Leishmania (Viannia) cause varying clinical symptoms ranging from cutaneous leishmaniases (CL) with single or few lesions, disseminated CL (DL) with multiple lesions to disfiguring forms of mucocutaneous leishmaniasis (MCL). In this population genetics study, 37 strains of L. (V.) guyanensis, 63 of L. (V.) braziliensis, four of L. (V.) shawi, six of L. (V.) lainsoni, seven of L. (V.) naiffi, one each of L. (V.) utingensis and L. (V.) lindenbergi, and one L. (V.) lainsoni/L. naiffi hybrid from different endemic foci in Brazil were examined for variation at 15 hyper-variable microsatellite markers. Methodology/Principal findings: The multilocus microsatellite profiles obtained for the 120 strains were analysed using both model- and distance-based methods. Significant genetic diversity was observed for all L. (Viannia) strains studied. The two cluster analysis approaches identified two principal genetic groups or populations, one consisting of strains of L. (V.) guyanensis from the Amazon region and the other of strains of L. (V.) braziliensis isolated along the Atlantic coast of Brazil. A third group comprised a heterogeneous assembly of species, including other strains of L. braziliensis isolated from the north of Brazil, which were extremely polymorphic. The latter strains seemed to be more closely related to those of L. (V.) shawi, L. (V.) naiffi, and L. (V.) lainsoni, also isolated in northern Brazilian foci. The MLMT approach identified an epidemic clone consisting of 13 strains of L. braziliensis from Minas Gerais, but evidence for recombination was obtained for the populations of L. (V.) braziliensis from the Atlantic coast and for L. (V.) guyanensis. Conclusions/Significance: Different levels of recombination versus clonality seem to occur within the subgenus L. (Viannia). Though clearly departing from panmixia, sporadic, but long-term sustained recombination might explain the tremendous genetic diversity and limited population structure found for such L. (Viannia) strains. Cutaneous leishmaniasis (CL) constitutes a significant public health problem in all federal states of Brazil. Most cases are caused by parasites of the subgenus Leishmania (Viannia) which can cause a variety of clinical symptoms ranging from single or few lesions, disseminated CL with multiple lesions, to disfiguring forms of mucocutaneous leishmaniasis. This study has used a multilocus microsatellite typing approach for exploring the genetic diversity and population structure among 120 strains representing different subgenus L. (Viannia) species and different Brazilian CL foci. Genetic diversity within the subgenus was much higher than expected, especially within L. (V.) braziliensis, L. (V.) shawi, L. (V.) naiffi, and L. (V.) lainsoni which were all from the north of Brazil. These strains could not be assigned to well-defined populations, but presented a rather loosely associated group. Strains of L. (V.) braziliensis isolated along the Atlantic coast of Brazil and strains of L. (V.) guyanensis formed, however, two clearly separated populations exhibiting remarkable levels of sexual exchange. The latter finding is in contrast to previous studies suggesting clonal modes of propagation or inbreeding for natural populations of Leishmania parasites and might explain the genetic heterogeneity and limited population structure for Brazilian strains of subgenus L. (Viannia) observed in this study.
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Affiliation(s)
- Katrin Kuhls
- Institut für Mikrobiologie und Hygiene, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Elisa Cupolillo
- Laboratório de Pesquisa em Leishmaniose, Instituto Oswaldo Cruz - Fiocruz, Rio de Janeiro, Brazil
| | - Soraia O. Silva
- Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Carola Schweynoch
- Institut für Mikrobiologie und Hygiene, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Mariana Côrtes Boité
- Laboratório de Pesquisa em Leishmaniose, Instituto Oswaldo Cruz - Fiocruz, Rio de Janeiro, Brazil
| | - Maria N. Mello
- Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Isabel Mauricio
- Instituto de Higiene e Medicina Tropical, Lisboa, Portugal
- Department of Pathogen Molecular Biology, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, United Kingdom
| | - Michael Miles
- Department of Pathogen Molecular Biology, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, United Kingdom
| | - Thierry Wirth
- Ecole Pratique des Hautes Etudes, Muséum National d'Histoire Naturelle, Département de Systématique et Évolution, UMR-CNRS 7205, Paris, France
| | - Gabriele Schönian
- Institut für Mikrobiologie und Hygiene, Charité Universitätsmedizin Berlin, Berlin, Germany
- * E-mail:
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Antileishmanial Phenylpropanoids from the Leaves of Hyptis pectinata (L.) Poit. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2013; 2013:460613. [PMID: 23983783 PMCID: PMC3745876 DOI: 10.1155/2013/460613] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/03/2013] [Accepted: 07/03/2013] [Indexed: 11/18/2022]
Abstract
Hyptis pectinata, popularly known in Brazil as "sambacaitá" or "canudinho," is an aromatic shrub largely grown in the northeast of Brazil. The leaves and bark are used in an infusion for the treatment of throat and skin inflammations, bacterial infections, pain, and cancer. Analogues of rosmarinic acid and flavonoids were obtained from the leaves of Hyptis pectinata and consisted of two new compounds, sambacaitaric acid (1) and 3-O-methyl-sambacaitaric acid (2), and nine known compounds, rosmarinic acid (3), 3-O-methyl-rosmarinic acid (4), ethyl caffeate (5), nepetoidin A (6), nepetoidin B (7), cirsiliol (8), circimaritin (9), 7-O-methylluteolin (10), and genkwanin (11). The structures of these compounds were determined by spectroscopic methods. Compounds 1-5, and 7 were evaluated in vitro against the promastigote form of L. braziliensis, and the ethanol extract. The hexane, ethyl acetate, and methanol-water fractions were also evaluated. The EtOH extract, the hexane extract, EtOAc, MeOH:H2O fractions; and compounds 1, 2 and 4 exhibited antileishmanial activity, and compound 1 was as potent as pentamidine. In contrast, compounds 3, 5, and 7 did not present activity against the promastigote form of L. braziliensis below 100 µM. To our knowledge, compounds 1 and 2 are being described for the first time.
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Graça GCD, Volpini AC, Romero GAS, Oliveira Neto MPD, Hueb M, Porrozzi R, Boité MC, Cupolillo E. Development and validation of PCR-based assays for diagnosis of American cutaneous leishmaniasis and identification of the parasite species. Mem Inst Oswaldo Cruz 2013; 107:664-74. [PMID: 22850958 DOI: 10.1590/s0074-02762012000500014] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2011] [Accepted: 04/02/2012] [Indexed: 11/21/2022] Open
Abstract
In this study, PCR assays targeting different Leishmania heat-shock protein 70 gene (hsp70) regions, producing fragments ranging in size from 230-390 bp were developed and evaluated to determine their potential as a tool for the specific molecular diagnosis of cutaneous leishmaniasis (CL). A total of 70 Leishmania strains were analysed, including seven reference strains (RS) and 63 previously typed strains. Analysis of the RS indicated a specific region of 234 bp in the hsp70 gene as a valid target that was highly sensitive for detection of Leishmania species DNA with capacity of distinguishing all analyzed species, after polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP). This PCR assay was compared with other PCR targets used for the molecular diagnosis of leishmaniasis: hsp70 (1400-bp region), internal transcribed spacer (ITS)1 and glucose-6-phosphate dehydrogenase (G6pd). A good agreement among the methods was observed concerning the Leishmania species identification. Moreover, to evaluate the potential for molecular diagnosis, we compared the PCR targets hsp70-234 bp, ITS1, G6pd and mkDNA using a panel of 99 DNA samples from tissue fragments collected from patients with confirmed CL. Both PCR-hsp70-234 bp and PCR-ITS1 detected Leishmania DNA in more than 70% of the samples. However, using hsp70-234 bp PCR-RFLP, identification of all of the Leishmania species associated with CL in Brazil can be achieved employing a simpler and cheaper electrophoresis protocol.
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Affiliation(s)
- Grazielle Cardoso da Graça
- Laboratório de Pesquisa em Leishmaniose, Coleção de Leishmania, Instituto Oswaldo Cruz, Rio de Janeiro, RJ, Brasil
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Cavalcanti A, Lobo R, Cupolillo E, Bustamante F, Porrozzi R. Canine cutaneous leishmaniasis caused by neotropical Leishmania infantum despite of systemic disease: A case report. Parasitol Int 2012; 61:738-40. [PMID: 22583758 DOI: 10.1016/j.parint.2012.05.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2011] [Revised: 05/02/2012] [Accepted: 05/04/2012] [Indexed: 11/26/2022]
Abstract
Visceral leishmaniasis is an anthropozoonosis caused by a protozoan Leishmania infantum (syn. Leishmania chagasi). Here, we report a typical case of canine cutaneous leishmaniasis due to L. infantum infection without any other systemic symptom in one dog in the city of Rio de Janeiro, Brazil. A mongrel female dog was admitted in a veterinary clinic with reports of chronic wounds in the body. Physical examination revealed erosive lesions in the limbs, nasal ulcers, presence of ectoparasites and seborrheic dermatitis. Blood samples and fragments of healthy and injured skin were collected. The complete hemogram revealed aregenerative normocytic normochromic anemia and erythrocyte rouleaux, and biochemical analysis revealed normal renal and hepatic functions. Cytology of the muzzle and skin lesions suggested pyogranulomatous inflammatory process. The histopathology of a skin fragment was performed and revealed suspicion of protozoa accompanied by necrotizing dermatitis. The diagnosis of leishmaniasis was accomplished by positive serology, isolation of Leishmania from the skin lesion, and also by molecular test (PCR targeting the conserved region of Leishmania kDNA). Culture was positive for damaged skin samples. PCR targeting a fragment of Leishmania hsp70 gene was performed employing DNA extracted from damaged skin. RFLP of the amplified hsp70 fragment identified the parasite as L. infantum, instead of Leishmania braziliensis, the main agent of cutaneous leishmaniasis in Rio de Janeiro. Characterization of isolated promastigotes by five different enzymatic systems confirmed the species identification of the etiological agent. Serology was positive by ELISA and rapid test. This case warns to the suspicion of viscerotropic Leishmania in cases of chronic skin lesions and brings the discussion of the mechanisms involved in the parasite tissue tropism.
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Affiliation(s)
- Amanda Cavalcanti
- Laboratório de Pesquisa em Leishmaniose, Fundação Oswaldo Cruz, Rio de Janeiro, Brazil.
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Bañuls AL, Bastien P, Pomares C, Arevalo J, Fisa R, Hide M. Clinical pleiomorphism in human leishmaniases, with special mention of asymptomatic infection. Clin Microbiol Infect 2012; 17:1451-61. [PMID: 21933304 DOI: 10.1111/j.1469-0691.2011.03640.x] [Citation(s) in RCA: 93] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
This review gives an update of current knowledge on the clinical pleiomorphism of Leishmania, with a special emphasis on the case of asymptomatic carriage. The first part describes the numerous unusual expressions of the disease that occur besides the classic (visceral, cutaneous, and mucocutaneous) forms of leishmaniases. The second part deals with progress in the understanding of disease outcome in humans, and the possible future approaches to improve our knowledge in the field. The third part highlights the role of the too often neglected asymptomatic carrier compartment. This group could be key to understanding infraspecific differences in virulence and pathogenicity of the parasite, as well as identifying the genetic determinants involved in the expression of the disease.
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Affiliation(s)
- A L Bañuls
- UMR MIVEGEC (IRD 224-CNRS 5290-Université Montpellier, France.
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Bedoya-Pacheco SJ, Araujo-Melo MH, Valete-Rosalino CM, Pimentel MIF, Conceição-Silva F, Schubach AO, Marzochi MCA. Endemic tegumentary leishmaniasis in Brazil: correlation between level of endemicity and number of cases of mucosal disease. Am J Trop Med Hyg 2011; 84:901-5. [PMID: 21633026 PMCID: PMC3110350 DOI: 10.4269/ajtmh.2011.10-0595] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2010] [Accepted: 03/04/2011] [Indexed: 11/07/2022] Open
Abstract
The purpose of this study was to establish a correlation between the endemic level of tegumentary leishmaniasis in different regions of Brazil during 2002-2009 and the number of cases of mucosal or mucocutaneous leishmaniasis. The proportion of mucosal leishmaniasis was inversely correlated with prevalence of infection. In areas with a lower infection prevalence, the proportion of mucosal leishmaniasis increased (P < 0.05). The hypothesis of an Amazonian origin and dissemination through human migration is considered. Our results show that in regions with lower prevalence and endemically younger, the proportion of cases that evolve to the mucosal form is higher than in regions with higher prevalence and endemically older.
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Affiliation(s)
- Sandro J Bedoya-Pacheco
- Evandro Chagas Clinical Research Institute, Oswaldo Cruz Foundation, Av. Brasil 4365, Manguinhos, Rio de Janeiro, Brazil.
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Buitrago R, Cupolillo E, Bastrenta B, Le Pont F, Martinez E, Barnabé C, Brenière SF. PCR-RFLP of ribosomal internal transcribed spacers highlights inter and intra-species variation among Leishmania strains native to La Paz, Bolivia. INFECTION GENETICS AND EVOLUTION 2011; 11:557-63. [DOI: 10.1016/j.meegid.2010.11.019] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2010] [Revised: 11/26/2010] [Accepted: 11/29/2010] [Indexed: 10/18/2022]
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Rocha MN, Margonari C, Presot IM, Soares RP. Evaluation of 4 polymerase chain reaction protocols for cultured Leishmania spp. typing. Diagn Microbiol Infect Dis 2011; 68:401-9. [PMID: 20926219 DOI: 10.1016/j.diagmicrobio.2010.08.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2010] [Revised: 08/02/2010] [Accepted: 08/13/2010] [Indexed: 11/24/2022]
Abstract
Leishmaniasis is a disease caused by the protozoan Leishmania resulting in a variety of clinical manifestations, from self-healing skin lesions to fatal visceral disease. The development of polymerase chain reaction (PCR)-based techniques has made species identification easier, faster, and less labor intensive. The main targets for PCR amplification include kinetoplastid DNA (kDNA), miniexon, and conserved regions such as the internal transcribed spacer. The objective of this work was to evaluate 4 different PCR techniques designed to type Leishmania using laboratory strains. Parasites were subjected to 4 PCR procedures using specific Leishmania primers for miniexon (designated A1 and A2) and kDNA (designated B1 and B2, C1 and C2, and D1, D2 and D3). Discrimination between some species and the 2 main subgenera Leishmania and Viannia was achieved. Unweighted pair group method analysis resulted in the expected clustering of the 2 species from the subgenus Leishmania. However, some species in the subgenus Viannia could not be distinguished, representing a continued challenge for PCR-based protocols. Results are discussed in terms of advantages, limitations, and reproducibility of these 4 PCR-based techniques in the taxonomy of Leishmania.
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Affiliation(s)
- Marcele Neves Rocha
- Laboratory of Medical Entomology, Centro de Pesquisas René Rachou, Fundação Oswaldo Cruz/FIOCRUZ, 30190-002 Belo Horizonte, MG, Brazil
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Detwiler JT, Criscione CD. An infectious topic in reticulate evolution: introgression and hybridization in animal parasites. Genes (Basel) 2010; 1:102-23. [PMID: 24710013 PMCID: PMC3960858 DOI: 10.3390/genes1010102] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2010] [Revised: 06/07/2010] [Accepted: 06/07/2010] [Indexed: 02/08/2023] Open
Abstract
Little attention has been given to the role that introgression and hybridization have played in the evolution of parasites. Most studies are host-centric and ask if the hybrid of a free-living species is more or less susceptible to parasite infection. Here we focus on what is known about how introgression and hybridization have influenced the evolution of protozoan and helminth parasites of animals. There are reports of genome or gene introgression from distantly related taxa into apicomplexans and filarial nematodes. Most common are genetic based reports of potential hybridization among congeneric taxa, but in several cases, more work is needed to definitively conclude current hybridization. In the medically important Trypanosoma it is clear that some clonal lineages are the product of past hybridization events. Similarly, strong evidence exists for current hybridization in human helminths such as Schistosoma and Ascaris. There remain topics that warrant further examination such as the potential hybrid origin of polyploid platyhelminths. Furthermore, little work has investigated the phenotype or fitness, and even less the epidemiological significance of hybrid parasites.
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Affiliation(s)
- Jillian T Detwiler
- Department of Biology, Texas A&M University, 3258 TAMU, College Station, TX 77843, USA.
| | - Charles D Criscione
- Department of Biology, Texas A&M University, 3258 TAMU, College Station, TX 77843, USA.
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Ampuero J, Rios AP, Carranza-Tamayo CO, Romero GAS. Genus-specific kinetoplast-DNA PCR and parasite culture for the diagnosis of localised cutaneous leishmaniasis: applications for clinical trials under field conditions in Brazil. Mem Inst Oswaldo Cruz 2010; 104:992-7. [PMID: 20027466 DOI: 10.1590/s0074-02762009000700009] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2009] [Accepted: 09/02/2009] [Indexed: 11/22/2022] Open
Abstract
The positivities of two methods for the diagnosis of localised cutaneous leishmaniasis (CL) were estimated in 280 patients enrolled in a clinical trial. The trial was conducted in an endemic area of Leishmania (Viannia) braziliensis and trial participants were patients with skin ulcers and positive leishmanin skin tests. Patients underwent aspirative skin punctures of the ulcerated lesions and lymph nodes for in vitro cultures, which were processed under field conditions at the local health centre. Skin lesion biopsies were tested at a reference laboratory using kinetoplastid DNA (kDNA)-PCR to detect DNA. The median time required to obtain a positive culture from the skin samples was seven days and the contamination rate of the samples was 1.8%. The positivities of the cultures from skin lesions, kDNA-PCR and the combination of the two methods were 78.2% (95% CI: 73-82.6%), 89.3% (95% CI: 85.1-92.4%) and 97.1% (95% CI: 94.5-98.5%). We conclude that parasite culture is a feasible method for the detection of Leishmania in field conditions and that the combination of culture and PCR has a potential role for the diagnosis of CL in candidates for clinical trials.
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Affiliation(s)
- Julia Ampuero
- Núcleo de Medicina Tropical, Universidade de Brasília, Brasília, DF, Brasil
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van Thiel PPAM, Gool TV, Kager PA, Bart A. First cases of cutaneous leishmaniasis caused by Leishmania (Viannia) naiffi infection in Surinam. Am J Trop Med Hyg 2010; 82:588-90. [PMID: 20348504 DOI: 10.4269/ajtmh.2010.09-0360] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
Cutaneous leishmaniasis in Surinam is generally caused by infection by Leishmania guyanensis. We report three cases of infection with Leishmania (Viannia) naiffi, a Leishmania species not described from Surinam before. Treatment with pentamidine proved to be effective.
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Affiliation(s)
- Pieter-Paul A M van Thiel
- Department of Infectious Diseases, Tropical Medicine and Aids, Academic Medical Center, University of Amsterdam, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands.
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da Silva LA, de Sousa CDS, da Graça GC, Porrozzi R, Cupolillo E. Sequence analysis and PCR-RFLP profiling of the hsp70 gene as a valuable tool for identifying Leishmania species associated with human leishmaniasis in Brazil. INFECTION GENETICS AND EVOLUTION 2009; 10:77-83. [PMID: 19913112 DOI: 10.1016/j.meegid.2009.11.001] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2009] [Revised: 10/25/2009] [Accepted: 11/02/2009] [Indexed: 11/19/2022]
Abstract
Since the first report of the genus Leishmania, many species have been described. In Brazil, human leishmaniasis has been associated with eight Leishmania species, of which seven are responsible for cutaneous leishmaniasis (CL). In some endemic areas, CL is associated with only one species; however, in other areas, such as the Amazon, the etiology of CL can be assigned to many species. The multitude of highly similar Leishmania species in Brazil makes it difficult to develop an appropriate method of typing them. Most Leishmania species were first described based on epidemiological and biological characteristics, and these were later corroborated by Multilocus Enzyme Electrophoresis (MLEE), the gold standard technique for identifying Leishmania species. In an attempt to overcome the limitations of MLEE, many PCR-based methods have been developed and used for parasite identification. In the present study, we analyzed the sequence of the hsp70 gene in Leishmania species associated with human leishmaniasis in Brazil. This analysis led to the identification of restriction enzymes that could be used for PCR-RFLP-based identification. The results obtained were in complete agreement with those obtained by MLEE, suggesting that PCR-RFLP analysis of hsp70 could soon replace MLEE for routine Leishmania typing.
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Affiliation(s)
- Leonardo Alves da Silva
- Laboratório de Pesquisa em Leishmaniose, Instituto Oswaldo Cruz, FIOCRUZ, Av. Brasil 4365, Manguinhos, 21045-900 Rio de Janeiro, RJ, Brazil
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Rangel EF, Lainson R. Proven and putative vectors of American cutaneous leishmaniasis in Brazil: aspects of their biology and vectorial competence. Mem Inst Oswaldo Cruz 2009; 104:937-54. [PMID: 20027458 DOI: 10.1590/s0074-02762009000700001] [Citation(s) in RCA: 117] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2009] [Accepted: 10/19/2009] [Indexed: 11/22/2022] Open
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Development of a multilocus microsatellite typing approach for discriminating strains of Leishmania (Viannia) species. J Clin Microbiol 2009; 47:2818-25. [PMID: 19587302 DOI: 10.1128/jcm.00645-09] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
A multilocus microsatellite typing (MLMT) approach based on the analysis of 15 independent loci has been developed for the discrimination of strains belonging to different Viannia species. Thirteen microsatellite loci were isolated de novo from microsatellite-enriched libraries for both Leishmania braziliensis and L. guyanensis. Two previously identified markers, AC01 and AC16, were modified and added to our marker set. Markers were designed to contain simple dinucleotide repeats flanked by the minimal possible number of nucleotides in order to allow variations in repeat numbers to be scored as size variations of the PCR products. The 15 markers in total were amplified for almost all of the strains of Viannia tested; one marker did not amplify from the two L. peruviana strains included in the study. When 30 strains of L. braziliensis, 21 strains of L. guyanensis, and 2 strains of L. peruviana were tested for polymorphisms, all strains except two strains of L. guyanensis had individual MLMT types. Distance-based analysis identified three main clusters. All strains except one strain of L. guyanensis grouped together. Two clusters consisted of strains of L. braziliensis according to their geographical origins. The two strains of L. peruviana grouped together with strains of L. braziliensis from Peru and the adjacent Brazilian state of Acre. MLMT has proven capable of individualizing strains even from the same areas of endemicity and of detecting genetic structures at different levels. MLMT is thus applicable for epidemiological and population genetic studies of strains within the subgenus Viannia.
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