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Casanovas-Massana A, Hamond C, Santos LA, de Oliveira D, Hacker KP, Balassiano I, Costa F, Medeiros MA, Reis MG, Ko AI, Wunder EA. Leptospira yasudae sp. nov. and Leptospira stimsonii sp. nov., two new species of the pathogenic group isolated from environmental sources. Int J Syst Evol Microbiol 2020; 70:1450-1456. [PMID: 31184568 PMCID: PMC10197099 DOI: 10.1099/ijsem.0.003480] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Accepted: 05/13/2019] [Indexed: 09/08/2023] Open
Abstract
Four spirochetes (F1T, B21, YaleT and AMB6-RJ) were isolated from environmental sources: F1T and B21 from soils of an urban slum community in Salvador (Brazil), YaleT from river water in New Haven, Connecticut (USA) and AMB6-RJ from a pond in a horse farm in Rio de Janeiro (Brazil). Isolates were helix-shaped, aerobic, highly motile and non-virulent in a hamster model of infection. Draft genomes of the strains were obtained and analysed to determine the relatedness to other species of the genus Leptospira. The analysis of 498 core genes showed that strains F1T/B21 and YaleT/AMB6-RJ formed two distinct phylogenetic clades within the 'Pathogens' group (group I). The average nucleotide identity (ANI) values of strains F1T/B21 and YaleT/AMB6-RJ to other previously described Leptospira species were below <84 % and <82 %, respectively, which confirmed that these isolates should be classified as representatives of two novel species. Therefore, we propose Leptospirayasudae sp. nov. and Leptospirastimsonii sp. nov. as new species in the genus Leptospira. The type strains are F1T (=ATCC-TSD-163=KIT0259=CLEP00287) and YaleT (=ATCC-TDS-162=KIT0258=CLEP00288), respectively.
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Affiliation(s)
- Arnau Casanovas-Massana
- Epidemiology of Microbial Diseases, School of Public Health, Yale University, New Haven, CT, USA
| | - Camila Hamond
- Epidemiology of Microbial Diseases, School of Public Health, Yale University, New Haven, CT, USA
- Present address: Instituto Nacional de Investigación Agropecuaria, Estación Experimental La Estanzuela, Colonia, Uruguay and Unidad Mixta Pasteur + INIA (UMPI), Institut Pasteur de Montevideo/Instituto Nacional de Investigación Agropecuaria, Montevideo, Uruguay
| | - Luciane A. Santos
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation, Brazilian Ministry of Health, Salvador, Bahia, Brazil
| | - Daiana de Oliveira
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation, Brazilian Ministry of Health, Salvador, Bahia, Brazil
| | - Kathryn P. Hacker
- Epidemiology of Microbial Diseases, School of Public Health, Yale University, New Haven, CT, USA
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation, Brazilian Ministry of Health, Salvador, Bahia, Brazil
| | - Ilana Balassiano
- Centro de Referência Nacional para Leptospirose/Coleção de Leptospira, Laboratório de Zoonoses Bacterianas, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil
| | - Federico Costa
- Epidemiology of Microbial Diseases, School of Public Health, Yale University, New Haven, CT, USA
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation, Brazilian Ministry of Health, Salvador, Bahia, Brazil
- Instituto da Saúde Coletiva, Universidade Federal da Bahia, Salvador, Bahia, Brazil
| | - Marco A. Medeiros
- Bio-Manguinhos, Oswaldo Cruz Foundation, Brazilian Ministry of Health, Rio de Janeiro, Brazil
| | - Mitermayer G. Reis
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation, Brazilian Ministry of Health, Salvador, Bahia, Brazil
| | - Albert I. Ko
- Epidemiology of Microbial Diseases, School of Public Health, Yale University, New Haven, CT, USA
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation, Brazilian Ministry of Health, Salvador, Bahia, Brazil
| | - Elsio A. Wunder
- Epidemiology of Microbial Diseases, School of Public Health, Yale University, New Haven, CT, USA
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation, Brazilian Ministry of Health, Salvador, Bahia, Brazil
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Waggoner JJ, Abeynayake J, Balassiano I, Lefterova M, Sahoo MK, Liu Y, Vital-Brazil JM, Gresh L, Balmaseda A, Harris E, Banaei N, Pinsky BA. Multiplex nucleic acid amplification test for diagnosis of dengue fever, malaria, and leptospirosis. J Clin Microbiol 2014; 52:2011-8. [PMID: 24671788 PMCID: PMC4042768 DOI: 10.1128/jcm.00341-14] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2014] [Accepted: 03/21/2014] [Indexed: 01/24/2023] Open
Abstract
Dengue, leptospirosis, and malaria are among the most common etiologies of systemic undifferentiated febrile illness (UFI) among travelers to the developing world, and these pathogens all have the potential to cause life-threatening illness in returned travelers. The current study describes the development of an internally controlled multiplex nucleic acid amplification test for the detection of dengue virus (DENV) and Leptospira and Plasmodium species, with a specific callout for Plasmodium falciparum (referred to as the UFI assay). During analytical evaluation, the UFI assay displayed a wide dynamic range and a sensitive limit of detection for each target, including all four DENV serotypes. In a clinical evaluation including 210 previously tested samples, the sensitivities of the UFI assay were 98% for DENV (58/59 samples detected) and 100% for Leptospira and malaria (65/65 and 20/20 samples, respectively). Malaria samples included all five Plasmodium species known to cause human disease. The specificity of the UFI assay was 100% when evaluated with a panel of 66 negative clinical samples. Furthermore, no amplification was observed when extracted nucleic acids from related pathogens were tested. Compared with whole-blood samples, the UFI assay remained positive for Plasmodium in 11 plasma samples from patients with malaria (parasitemia levels of 0.0037 to 3.4%). The syndrome-based design of the UFI assay, combined with the sensitivities of the component tests, represents a significant improvement over the individual diagnostic tests available for these pathogens.
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Affiliation(s)
- Jesse J Waggoner
- Department of Medicine, Division of Infectious Diseases and Geographic Medicine, Stanford University School of Medicine, Stanford, California, USA
| | - Janaki Abeynayake
- Department of Pathology, Stanford University School of Medicine, Stanford, California, USA
| | - Ilana Balassiano
- Laboratório de Zoonoses Bacterianas, Centro de Referência Nacional para Leptospirose, Coleção de Leptospira, WHO/PAHO Centro Colaborador para Leptospirose, Instituto Oswaldo Cruz, Rio de Janeiro, Brazil
| | - Martina Lefterova
- Department of Pathology, Stanford University School of Medicine, Stanford, California, USA
| | - Malaya K Sahoo
- Department of Pathology, Stanford University School of Medicine, Stanford, California, USA
| | - Yuanyuan Liu
- Department of Pathology, Stanford University School of Medicine, Stanford, California, USA
| | - Juliana Magalhães Vital-Brazil
- Laboratório de Zoonoses Bacterianas, Centro de Referência Nacional para Leptospirose, Coleção de Leptospira, WHO/PAHO Centro Colaborador para Leptospirose, Instituto Oswaldo Cruz, Rio de Janeiro, Brazil
| | - Lionel Gresh
- Sustainable Sciences Institute, Managua, Nicaragua
| | - Angel Balmaseda
- National Virology Laboratory, Centro Nacional de Diagnóstico y Referencia, Ministry of Health, Managua, Nicaragua
| | - Eva Harris
- Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, California, USA
| | - Niaz Banaei
- Department of Medicine, Division of Infectious Diseases and Geographic Medicine, Stanford University School of Medicine, Stanford, California, USA Department of Pathology, Stanford University School of Medicine, Stanford, California, USA
| | - Benjamin A Pinsky
- Department of Medicine, Division of Infectious Diseases and Geographic Medicine, Stanford University School of Medicine, Stanford, California, USA Department of Pathology, Stanford University School of Medicine, Stanford, California, USA
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