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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] [MESH Headings] [Grants] [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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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.
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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
| | - 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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Chagas ECDS, Silva AS, Fé NF, Ferreira LS, Sampaio VDS, Terrazas WCM, Guerra JAO, Souza RAFD, Silveira H, Guerra MDGVB. Composition of sand fly fauna (Diptera: Psychodidae) and detection of Leishmania DNA (Kinetoplastida: Trypanosomatidae) in different ecotopes from a rural settlement in the central Amazon, Brazil. Parasit Vectors 2018. [PMID: 29534747 PMCID: PMC5848579 DOI: 10.1186/s13071-018-2743-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Background Phlebotomine sand flies (Diptera: Psychodidae) are vectors of Leishmania species, the etiological agents of leishmaniasis, which is one of the most important emerging infectious diseases in the Americas. In the state of Amazonas in Brazil, anthropogenic activities encourage the presence of these insects around rural homes. The present study aimed to describe the composition and distribution of sand fly species diversity among the ecotopes (intradomicile, peridomicile and forest) in an area of American cutaneous leishmaniasis transmission and detect natural infection with Leishmania DNA to evaluate which vectors are inside houses and whether the presence of possible vectors represents a hazard of transmission. Results Phlebotomine sand flies were collected using light traps. A total of 2469 specimens representing 54 species, predominantly females (71.2%), were collected from four sites. Polymerase chain reaction analysis was performed on 670 samples to detect Leishmania DNA. Most of the samples (79.5%) were collected in the forest, with areas closer to rural dwellings yielding a greater abundance of suspected or proven vectors and a larger number of species containing Leishmania DNA. Nyssomyia umbratilis and Bichromomyia flaviscutellata were found near rural homes, and Ny. umbratilis was also found inside homes. Leishmania DNA was detected in different species of sand flies in all ecotopes, including species with no previous record of natural infection. Conclusions There is no evidence that vectors of American cutaneous leishmaniasis are becoming established inside homes, but there are sand flies, including Ny. umbratilis and other possible vectors, in environments characterized by a human presence. These species continue to be predominant in the forest but are prevalent in areas closer to ecotopes with a greater human presence. The existence of proven or suspected vectors in this ecotope is due to the structural organization of rural settlements and may represent a hazard of transmission. Although the detection of Leishmania DNA in species that were not previously considered vectors does not mean that they are transmitting the parasite, it does show that the parasite is circulating in ecotopes where these species are found.
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Affiliation(s)
- Erica Cristina da Silva Chagas
- Universidade do Estado do Amazonas (Programa de Pós-graduação em Medicina Tropical/Programa de Pos-graduação em Clima e Ambiente), Manaus, Amazonas, Brasil.,Fundação de Medicina Tropical Dr. Heitor Vieira Dourado, Manaus, Amazonas, Brasil.,Fundação de Vigilância em Saúde do Estado do Amazonas, Manaus, Amazonas, Brasil
| | - Arineia Soares Silva
- Universidade do Estado do Amazonas (Programa de Pós-graduação em Medicina Tropical/Programa de Pos-graduação em Clima e Ambiente), Manaus, Amazonas, Brasil.,Fundação de Medicina Tropical Dr. Heitor Vieira Dourado, Manaus, Amazonas, Brasil
| | - Nelson Ferreira Fé
- Fundação de Medicina Tropical Dr. Heitor Vieira Dourado, Manaus, Amazonas, Brasil
| | - Lucas Silva Ferreira
- Fundação de Medicina Tropical Dr. Heitor Vieira Dourado, Manaus, Amazonas, Brasil
| | | | | | - Jorge Augusto Oliveira Guerra
- Universidade do Estado do Amazonas (Programa de Pós-graduação em Medicina Tropical/Programa de Pos-graduação em Clima e Ambiente), Manaus, Amazonas, Brasil.,Fundação de Medicina Tropical Dr. Heitor Vieira Dourado, Manaus, Amazonas, Brasil
| | - Rodrigo Augusto Ferreira de Souza
- Universidade do Estado do Amazonas (Programa de Pós-graduação em Medicina Tropical/Programa de Pos-graduação em Clima e Ambiente), Manaus, Amazonas, Brasil
| | - Henrique Silveira
- Instituto de Higiene e Medicina Tropical de Lisboa, Universidade Nova de Lisboa, Lisboa, Portugal
| | - Maria das Graças Vale Barbosa Guerra
- Universidade do Estado do Amazonas (Programa de Pós-graduação em Medicina Tropical/Programa de Pos-graduação em Clima e Ambiente), Manaus, Amazonas, Brasil. .,Fundação de Medicina Tropical Dr. Heitor Vieira Dourado, Manaus, Amazonas, Brasil.
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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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The role of inflammatory, anti-inflammatory, and regulatory cytokines in patients infected with cutaneous leishmaniasis in Amazonas State, Brazil. J Immunol Res 2014; 2014:481750. [PMID: 25295285 PMCID: PMC4177821 DOI: 10.1155/2014/481750] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2014] [Accepted: 07/24/2014] [Indexed: 12/14/2022] Open
Abstract
The authors discuss in this paper the role of inflammatory, anti-inflammatory, and regulatory cytokines in patients infected with different species of Leishmania in Amazonas State, Brazil. A comparative analysis was made of serum concentrations of these cytokines in the peripheral blood of 33 patients infected with cutaneous leishmaniasis. The isolates were identified as Leishmania guyanensis, L. naiffi, and L. amazonensis. Most (64%) of the patients were male ranging in age from 18 to 58 years. Protein expression profiles of IL-2, IL-4, IL-6, IL-10, IFN-γ, TNF-α, and IL-17 cytokines were shown to vary significantly between infected and noninfected (control group) individuals and according to the Leishmania species. Infection caused by L. guyanensis accounted for 73% of the cases and patients with this parasite also showed higher concentrations of IL-2, IFN-γ, IL-4, and IL-17 when compared to infection by L. amazonensis. Patients with infection caused by L. naiffi showed higher concentration of the cytokines analyzed when compared to uninfected patients; however, there was no statistically significant difference with the other species analyzed.
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Haouas N, Chaker E, Chargui N, Gorcii M, Belhadj S, Kallel K, Aoun K, Akrout FM, Ben Said M, Pratlong F, Dedet JP, Mezhoud H, Lami P, Zribi M, Azaiez R, Babba H. Geographical distribution updating of Tunisian leishmaniasis foci: about the isoenzymatic analysis of 694 strains. Acta Trop 2012; 124:221-8. [PMID: 22940099 DOI: 10.1016/j.actatropica.2012.08.012] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2011] [Revised: 07/29/2012] [Accepted: 08/15/2012] [Indexed: 11/24/2022]
Abstract
Over a period of ten years, a series of 694 Leishmania strains from Tunisian leishmaniasis foci were isolated and identified by isoenzymatic analysis. Strains were obtained from human cutaneous and visceral leishmaniasis in immunocompetent subjects, visceral leishmaniasis in imunocompromised individuals and from dogs with visceral leishmaniasis. Two classically dermotropic species, Leishmania (L.) major and Leishmania killicki were found. L. major with the single zymodeme MON-25 was the most isolated in cutaneous leishmaniasis foci of the Centre and South of Tunisia with a recent northern extension. L. killicki zymodeme MON-8 was sporadically found both in its classical microfocus of Tataouine in southeastern Tunisia as well as in some new foci in Southwestern, Central and Northern Tunisia. Leishmania infantum with its three zymodemes MON-1, MON-24 and MON-80 was isolated from both visceral and cutaneous human cases. The majority of L. infantum strains were found in the Northern part of the country; however, some strains were reported for the first time in the Southern part. L. infantum MON-1 was the only zymodeme isolated from canine leishmaniasis.
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Lima Junior MSDC, Andreotti R, Dorval MEMC, Oshiro ET, Oliveira AGD, Matos MDFC. [Identification of Leishmania species isolated in human cases in Mato Grosso do Sul, by means of the polymerase chain reaction]. Rev Soc Bras Med Trop 2009; 42:303-8. [PMID: 19684979 DOI: 10.1590/s0037-86822009000300012] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2008] [Accepted: 04/03/2009] [Indexed: 11/22/2022] Open
Abstract
Leishmaniases are endemic zoonoses in the State of Mato Grosso do Sul. Their etiological agents in this region of Brazil are Leishmania (Leishmania) chagasi, Leishmania (Leishmania) amazonensis and Leishmania (Viannia) braziliensis. The polymerase chain reaction (PCR) is a tool with high specificity and sensitivity for identifying Leishmania species. This study examined 39 cryopreserved isolates of Leishmania that had been collected by bone marrow aspiration and/or lesion biopsy, depending on the clinical suspicion. The isolates were subjected to DNA extraction and PCR using the following primers: RV1/RV2 for identifying Leishmania (Leishmania) chagasi, a1/a2 for Leishmania (Leishmania) amazonensis and b1/b2 for Leishmania (Viannia) braziliensis.Leishmania (Leishmania) chagasi was the only species identified in the 37 cases of visceral leishmaniasis.Leishmania (Leishmania) amazonensis was identified in two isolates from patients with a diagnosis of cutaneous leishmaniasis. The results obtained confirm that it is possible to use these three pairs of primers as a tool for characterizing Leishmania isolates.
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Affiliation(s)
- Manoel Sebastião da Costa Lima Junior
- Programa de Pós-Graduação em Doenças Infecciosas e Parasitárias, Faculdade de Medicina, Universidade Federal do Mato Grosso do Sul, Campo Grande, MS
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Figueira LDP, Zanotti M, Pinheiro FG, Franco AMR. Caracterização isoenzimática de isolados humanos de Leishmania sp (Kinetoplastida: Trypanosomatidae) dos municípios de Rio Preto da Eva e Manaus, Estado do Amazonas. Rev Soc Bras Med Trop 2008; 41:512-4. [DOI: 10.1590/s0037-86822008000500016] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2008] [Accepted: 08/27/2008] [Indexed: 11/21/2022] Open
Abstract
Foram caracterizados/identificados por eletroforese de isoenzimas 23 isolados de Leishmania sp de pacientes dos municípios de Rio Preto da Eva e Manaus, analisando-se o grau de similaridade entre os organismos. Os resultados indicaram ocorrência de Leishmania guyanensis e Leishmania naiffi nestes dois ambientes e a heterogeneidade das amostras de Leishmania naiffi.
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