Isolation of Pathogenic Leptospira Strains from Naturally
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RESEARCH ARTICLE Phylogenetic relationships and diversity of bat-associated Leptospira and the histopathological evaluation of these infections in bats from Grenada, West Indies 1☯ 1☯ 1 1 Amanda I. Bevans , Daniel M. FitzpatrickID , Diana M. Stone , Brian P. ButlerID , Maia 2 1 P. Smith , Sonia CheethamID * 1 Department of Pathobiology, School of Veterinary Medicine, St. George's University, Grenada, West a1111111111 Indies, 2 Department of Public Health and Preventive Medicine, School of Medicine, St. George's University, Grenada, West Indies a1111111111 a1111111111 ☯ These authors contributed equally to this work. a1111111111 * [email protected] a1111111111 Abstract Bats can harbor zoonotic pathogens, but their status as reservoir hosts for Leptospira bacte- OPEN ACCESS ria is unclear. During 2015±2017, kidneys from 47 of 173 bats captured in Grenada, West Citation: Bevans AI, Fitzpatrick DM, Stone DM, Indies, tested PCR-positive for Leptospira. Sequence analysis of the Leptospira rpoB gene Butler BP, Smith MP, Cheetham S (2020) Phylogenetic relationships and diversity of bat- from 31 of the positive samples showed 87±91% similarity to known Leptospira species. associated Leptospira and the histopathological Pairwise and phylogenetic analysis of sequences indicate that bats from Grenada harbor as evaluation of these infections in bats from Grenada, many as eight undescribed Leptospira genotypes that are most similar to known pathogenic West Indies. PLoS Negl Trop Dis 14(1): e0007940. Leptospira, including known zoonotic serovars. Warthin-Starry staining revealed leptospiral https://doi.org/10.1371/journal.pntd.0007940 organisms colonizing the renal tubules in 70% of the PCR-positive bats examined. Mild Editor: Tao Lin, Baylor College of Medicine, inflammatory lesions in liver and kidney observed in some bats were not significantly corre- UNITED STATES lated with renal Leptospira PCR-positivity. -
4 Development of Polymerase Chain Reaction Assay for Targeting.Indd
International Journal of Current Research and Review Original Research Article DOI: http://dx.doi.org/10.31782/IJCRR.2018.10154 Development of Polymerase Chain Reaction Assay for Targeting IJCRR Section: Life Sciences Sci. Journal Impact Cytochrome C Maturation F (ccmF) Gene Factor: 5.385 (2017) ICV: 71.54 (2015) of Leptospira Potdar Gayatri A.1, Dhotre Dheeraj P.2, Pol Sae S.3, Bharadwaj Renu S.4 1Research Scholar, Department of Microbiology, B.J.G.M.C., Pune-411001, MS, India; 2Scientist B, National Centre for Microbial Resources, Pune- 411001, MS, India; 3Associate Professor, Department of Microbiology, B.J.G.M.C., Pune -411001, MS, India; 4Professor and Head, Department of Microbiology, B.J.G.M.C., Pune-411001, MS, India. ABSTRACT Leptospirosis is a bacterial zoonotic disease caused by spirochetes of the genus Leptospira. The direct method of diagnosis of Leptospirosis has been so far by culture isolation but isolation rate of the microorganism from clinical specimens is low. The additional conventional method is the detection of antibodies which is done by ELISA, that fails to identify the infecting serovar. MAT is used as the gold standard, but it can only confirm the disease at a later acute phase because anti-Leptospira antibod- ies usually become measurable only 5 to 7 days after onset of illness. Thus, serology does not contribute to early diagnosis of Leptospirosis. To overcome these limitations, we developed PCR assay targeting ccmF gene of Leptospires using in-house designed RGf and RGr primers, with a product size of 910bp. The protocols were standardized. PCR could detect the target bacterial gene without any ambiguity. -
Leptospira Noguchii and Human and Animal Leptospirosis, Southern Brazil
LETTERS Leptospira noguchii previously isolated from animals such titer of 25 against saprophytic sero- as armadillo, toad, spiny rat, opossum, var Andamana by MAT. Both patients and Human and nutria, the least weasel (Mustela niva- were from the rural area of Pelotas. Animal Leptospirosis, lis), cattle, and the oriental fi re-bellied Unfortunately, convalescent-phase se- Southern Brazil toad (Bombina orientalis) in Argen- rum samples were not obtained from tina, Peru, Panama, Barbados, Ni- these patients. To the Editor: Pathogenic lep- caragua, and the United States (1,6). A third isolate (Hook strain) was tospires, the causative agents of lep- Human leptospirosis associated with obtained from a male stray dog with tospirosis, exhibit wide phenotypic L. noguchii has been reported only in anorexia, lethargy, weight loss, disori- and genotypic variations. They are the United States, Peru, and Panama, entation, diarrhea, and vomiting. The currently classifi ed into 17 species and with the isolation of strains Autum- animal died as a consequence of the >200 serovars (1,2). Most reported nalis Fort Bragg, Tarassovi Bac 1376, disease. The isolate was obtained from cases of leptospirosis in Brazil are of and Undesignated 2050, respectively a kidney tissue culture. No temporal urban origin and caused by Leptospira (1,6). The Fort Bragg strain was iso- or spatial relationship was found be- interrogans (3). Brazil underwent a lated during an outbreak among troops tween the 3 cases. dramatic demographic transformation at Fort Bragg, North Carolina. It was Serogrouping was performed by due to uncontrolled growth of urban identifi ed as the causative agent of an using a panel of rabbit antisera. -
Reduced Susceptibility in Leptospiral Strains of Bovine Origin Might Impair Antibiotic Therapy Cambridge.Org/Hyg
Epidemiology and Infection Reduced susceptibility in leptospiral strains of bovine origin might impair antibiotic therapy cambridge.org/hyg L. Correia, A. P. Loureiro and W. Lilenbaum Original Paper Departamento de Microbiologia e Parasitologia, Laboratório de Bacteriologia Veterinária, Universidade Federal Fluminense, Niterói, Rio de Janeiro, 24210-130, Brazil Cite this article: Correia L, Loureiro AP, Lilenbaum W (2019). Reduced susceptibility in Abstract leptospiral strains of bovine origin might impair antibiotic therapy. Epidemiology and Leptospirosis is a worldwide zoonotic disease determined by pathogenic spirochetes of the Infection 147,e5,1–6. https://doi.org/10.1017/ genus Leptospira. The control of bovine leptospirosis involves several measures including anti- S0950268818002510 biotic treatment of carriers. Despite its importance, few studies regarding antimicrobial sus- ceptibility of strains from bovine origin have been conducted. The aim of this study was to Received: 3 April 2018 Revised: 4 July 2018 determine the in vitro susceptibility of Leptospira strains obtained from cattle in Rio de Accepted: 10 August 2018 Janeiro, Brazil, against the main antibiotics used in bovine veterinary practice. A total of 23 Leptospira spp. strains were investigated for minimum inhibitory concentrations (MICs) Key words: and minimum bactericidal concentrations (MBCs) using broth macrodilution. At the species Antimicrobial; cattle; Leptospira; reduced susceptibility; Sejroe level, there were not differences in MIC susceptibility except for tetracycline (P < 0.05). Nevertheless, at the serogroup level, differences in MIC were observed among Sejroe strains, Author for correspondence: mainly for ceftiofur, doxycycline and in MBC for streptomycin (P < 0.05). One strain pre- W. Lilenbaum, E-mail: [email protected] sented MBC values above maximum plasmatic concentration described for streptomycin and was classified as presenting reduced susceptibility. -
Redalyc.Molecular Serovar Characterization of Leptospira
Biomédica ISSN: 0120-4157 [email protected] Instituto Nacional de Salud Colombia Romero-Viva, Claudia M.; Thiry, Dorothy; Rodríguez, Virginia; Calderón, Alfonso; Arrieta, Germán; Máttar, Salim; Cuello, Margarett; Levett, Paul N.; Falconar, Andrew K. Molecular serovar characterization of Leptospira isolates from animals and water in Colombia Biomédica, vol. 33, núm. 1, 2013, pp. 179-184 Instituto Nacional de Salud Bogotá, Colombia Available in: http://www.redalyc.org/articulo.oa?id=84328376019 How to cite Complete issue Scientific Information System More information about this article Network of Scientific Journals from Latin America, the Caribbean, Spain and Portugal Journal's homepage in redalyc.org Non-profit academic project, developed under the open access initiative Biomédica 2013;33(Supl.1):179-84 Leptospira spp serovar characterization doi: http://dx.doi.org/10.7705/biomedica.v33i0.731 COMUNICACIÓN BREVE Molecular serovar characterization of Leptospira isolates from animals and water in Colombia Claudia M. Romero-Vivas1, Dorothy Thiry2, Virginia Rodríguez3, Alfonso Calderón3, Germán Arrieta3, Salim Máttar3, Margarett Cuello1, Paul N. Levett2, Andrew K. Falconar1 1 Grupo de Investigaciones en Enfermedades Tropicales, Departamento de Medicina, Universidad del Norte, Barranquilla, Colombia 2 Saskatchewan Disease Control Laboratory, Regina, Saskatchewan, Canada 3 Instituto de Investigaciones Biológicas del Trópico, Universidad de Córdoba, Montería, Colombia Introduction: Leptospirosis is a bacterial disease transmitted directly or indirectly from animals to humans that may result in severe hemorrhagic, hepatic/renal and pulmonary disease. There are 20 known Leptospira species and hundreds of serovars, some of which belong to different species. It is essential to identify pathogenic Leptospira serovars and their potential reservoirs to prepare adequate control strategies. -
Molecular and Serological Approaches for the Detection and Typing of Leptospira
Ana Sofia Afonso Ferreira Molecular and Serological approaches for the Detection and Typing of Leptospira Tese de Candidatura ao grau de Doutor em Ciências Veterinárias, submetida ao Instituto de Ciências Biomédicas Abel Salazar da Universidade do Porto. Orientador – Doutor João Inácio Silva Categoria – Senior lecturer Afiliação – School of Pharmacy and Biomolecular Sciences, University of Brighton Coorientador- Doutora Maria Teresa Ribeiro Barata da Rocha Categoria – Investigador Auxiliar Afiliação – Instituto Nacional de Investigação Agrária e Veterinária, I.P. (INIAV) Coorientador- Doutora Gertrude Averil Baker Thompson Categoria – Professor Associado com Agregação Afiliação – Instituto de Ciências Biomédicas Abel Salazar da Universidade do Porto O trabalho apresentado nesta tese foi realizado no Instituto Nacional de Investigação Agrária e Veterinária (INIAV), no Instituto de Ciências Biomédicas Abel Salazar da Universidade do Porto (ICBAS) e no Royal Tropical Institute (KIT) e teve o apoio financeiro da Fundação para a Ciência e Tecnologia (FCT) através da bolsa SFRH/BD/ 62317/2009 Papers in peer-reviewed international scientific journals and book series directly related with the work presented: Ferreira, AS., Costa, P., Rocha, T., Amaro, A., Vieira, M. L., Ahmed, A., Thompson, G., Hartskeerl, R. A. and Inacio, J. (2014). Direct Detection and Differentiation of Pathogenic Leptospira Species Using a Multi-Gene Targeted Real Time PCR Approach. PloS ONE 9(11). Ahmed A, Ferreira AS, Hartskeerl RA. (2014). Multilocus sequence typing (MLST): markers for the traceability of pathogenic Leptospira strains. In Cunha MV, Inácio J (eds) Veterinary Infection Biology: Molecular Diagnostics and High-Throughput Strategies. Springer Science + Business Media, LLC, NY, USA. Ferreira A., Paiva-Cardoso M.N., Thomson G., Inácio J. -
Isolation of Pathogenic Leptospira Strains From
RESEARCH ARTICLE Isolation of pathogenic Leptospira strains from naturally infected cattle in Uruguay reveals high serovar diversity, and uncovers a relevant risk for human leptospirosis Leticia Zarantonelli1,2☯, Alejandra Suanes3☯, Paulina Meny4☯, Florencia Buroni5☯, Cecilia Nieves1³, Ximena Salaberry3³, Carolina Briano6³, Natalia Ashfield4, Caroline Da Silva Silveira7, Fernando Dutra6, Cristina Easton3, Martin Fraga7, Federico Giannitti7, a1111111111 Camila Hamond2,7, Melissa MacõÂas-Rioseco7, Clara MeneÂndez4, Alberto Mortola3, a1111111111 Mathieu Picardeau8,9, Jair Quintero4, Cristina RõÂos4, VõÂctor RodrõÂguez5, AgustõÂn Romero6, a1111111111 Gustavo Varela4, Rodolfo Rivero5*, Felipe Schelotto4*, Franklin Riet-Correa7*, a1111111111 Alejandro Buschiazzo1,9,10*, on behalf of the Grupo de Trabajo Interinstitucional de a1111111111 Leptospirosis Consortium¶ 1 Laboratorio de MicrobiologõÂa Molecular y Estructural, Institut Pasteur de Montevideo, Montevideo, Uruguay, 2 Unidad Mixta UMPI, Institut Pasteur de Montevideo + Instituto Nacional de InvestigacioÂn Agropecuaria INIA, Montevideo, Uruguay, 3 Departamento de BacteriologÂõa, DivisioÂn Laboratorios Veterinarios ªMiguel C. Rubinoº Sede Central, Ministerio de GanaderõÂa, Agricultura y Pesca, Montevideo, OPEN ACCESS Uruguay, 4 Departamento de BacteriologõÂa y VirologõÂa, Instituto de Higiene, Facultad de Medicina, Citation: Zarantonelli L, Suanes A, Meny P, Buroni Universidad de la RepuÂblica, Montevideo, Uruguay, 5 DivisioÂn Laboratorios Veterinarios ªMiguel C. Rubinoº Laboratorio Regional -
Leptospirosis Transmission Model with the Gender of Human and Season in Thailand
J. Basic. Appl. Sci. Res., 4(1)245-256, 2014 ISSN 2090-4304 Journal of Basic and Applied © 2014, TextRoad Publication Scientific Research www.textroad.com Leptospirosis Transmission Model with the Gender of Human and Season in Thailand Puntani Pongsumpun* Department of Mathematics, Faculty of Science, King Mongkut’s Institute of Technology Ladkrabang, Chalongkrung road, Ladkrabang, Bangkok 10520, Thailand. Received: November 10 2013 Accepted: December 8 2013 ABSTRACT Leptospirosis can be transmitted between people through direct and indirect ways by rat. Human can be infected by either touching the infected rats or contacting with water, soil containing urine from the infected rats through skin, eyes and nose. This disease can be found worldwide. In Thailand, this disease is found in men more than women. The season is influence to the transmission of this disease. The Leptospirosis cases are usually found in rainy season. In this paper, we study the transmission of this disease by formulating mathematical model considering gender of human and season in Thailand. The standard dynamical modeling method is used in this study. The analytical results are shown. The numerical solutions are presented to confirm our analytical results. KEYWORDS— gender, Leptospirosis, rat, season, transmission 1. INTRODUCTION The world's most common disease transmitted from animals to people, namely Leptospirosis. It can be transmitted to human by animal urine to come in contact with unhealed breaks in the skin, the eyes, or with the mucous membranes. A type of bacteria called a spirochete can cause the infection of Leptospirosis. Leptospira interrogans, Leptospira kirschneri, Leptospira noguchii, Leptospira borgpetersenii, Leptospira santarosai, Leptospira weilii and Leptospira inadai are 7 strains of Leptospirosis. -
Molecular and Serological Characterization of Pathogenic Leptospira Spp
Molecular and Serological Characterization of Pathogenic Leptospira Spp. Isolated From Symptomatic Dogs in a Highly Endemic Area, Brazil Cassia Moreira Santos ( [email protected] ) Universidade de Santo Amaro Gabrielle Cristini Del Rigo Santos Dias Universidade de Santo Amaro Alexya Victória Pinheiro Saldanha Universidade de Santo Amaro Stephanie Bergmann Esteves Universidade de Santo Amaro Adriana Cortez Universidade de Santo Amaro Israel Barbosa Guedes Universidade de São Paulo Marcos Bryan Heinemann Universidade de São Paulo Amane Paldês Gonçales Universidade de Santo Amaro Bruno Alonso Miotto Universidade de Santo Amaro Research Article Keywords: Autumnalis, Dogs, Icterohaemorrhagiae, Isolate, MAT, PCR Posted Date: February 23rd, 2021 DOI: https://doi.org/10.21203/rs.3.rs-230543/v1 License: This work is licensed under a Creative Commons Attribution 4.0 International License. Read Full License Page 1/12 Abstract Background: Leptospirosis is an endemic zoonosis in Brazil, with great impact in human and animal health. Although dogs are frequently infected by pathogenic Leptospira, the current epidemiological understanding of canine leptospirosis is mainly based on serological tests that predict the infecting serogroup/serovar. Thus, the present study aimed at identifying the causative agent for severe cases of canine leptospirosis in a highly endemic area through the isolation and characterization of the isolated strains. Results: Urine, serum and blood samples were collected from 31 dogs with suspected acute leptospirosis treated at the Veterinary Hospital Service of Santo Amaro University between 2018 and 2019. Acute infection was conrmed in 17 dogs (54.8%) by the associated use of Polymerase Chain Reaction (PCR), Microscopic Agglutination (MAT) and bacteriological culture. -
(Leptospirosis and Japanese Encephalitis) in Swine in Ten
bioRxiv preprint doi: https://doi.org/10.1101/584151; this version posted March 21, 2019. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under aCC-BY 4.0 International license. 1 Title 2 Seroprevalence of zoonotic diseases (leptospirosis and Japanese encephalitis) in swine in ten 3 provinces of Vietnam: a Bayesian approach to estimate prevalence 4 5 Authors and Affiliations 6 Hu Suk Lee1*, To Long Thanh2, Nguyen Khanh Ly2, Hung Nguyen-Viet1, Krishna K. Thakur3, 7 Delia Grace4 8 1. International Livestock Research Institute, Hanoi, Vietnam 9 2. National Center for Veterinary Diagnosis, 15/78 Duong Giai Phong – Phuong Mai Dong Da 10 Hanoi, Hanoi 11 3. Department of Health Management, Atlantic Veterinary College, University of Prince Edward 12 Island, Charlottetown, PEI, Canada 13 4. International Livestock Research Institute, Nairobi, Kenya 14 15 *Address for correspondence: Hu Suk Lee, International Livestock Research Institute, 16 Regional Office for East and Southeast Asia, Room 301-302, B1 Building, Van Phuc Diplomatic 17 Compound, 298 Kim Ma Street, Ba Dinh District, Hanoi, Vietnam, Email: [email protected], 18 Phone number: +84 4323 739 94 1 bioRxiv preprint doi: https://doi.org/10.1101/584151; this version posted March 21, 2019. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under aCC-BY 4.0 International license. -
Regional Prevalence of Intermediate Leptospira Spp. in Humans: a Meta-Analysis
pathogens Article Regional Prevalence of Intermediate Leptospira spp. in Humans: A Meta-Analysis Aina Nadheera Abd Rahman 1, Nurul Husna Hasnul Hadi 1, Zhong Sun 1 , Karuppiah Thilakavathy 1,2,* and Narcisse Joseph 3,* 1 Department of Biomedical Science, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia; [email protected] (A.N.A.R.); [email protected] (N.H.H.H.); [email protected] (Z.S.) 2 Genetics and Regenerative Medicine Research Group, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia 3 Department of Medical Microbiology, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia * Correspondence: [email protected] (K.T.); [email protected] (N.J.) Abstract: Leptospirosis is one of the most widespread bacterial diseases caused by pathogenic Lep- tospira. There are broad clinical manifestations due to varied pathogenicity of Leptospira spp., which can be classified into three clusters such as pathogenic, intermediate, and saprophytic. Intermediate Leptospira spp. can either be pathogenic or non-pathogenic and they have been reported to cause mild to severe forms of leptospirosis in several studies, contributing to the disease burden. Hence, this study aimed to estimate the global prevalence of intermediate Leptospira spp. in humans using meta-analysis with region-wise stratification. The articles were searched from three databases which include PubMed, Scopus, and ScienceDirect. Seven studies were included consisting of two regions based on United Nations geo-scheme regions, among 469 records identified. Statistical analysis Citation: Abd Rahman, A.N.; Hasnul Hadi, N.H.; Sun, Z.; was performed using RevMan software. -
Differentiation of Leptospira Species and Serovars by PCR-Restriction Endonuclease Analysis, Arbitrarily Primed PCR and Low-Stringency PCR
J. Med. Microbiol. - Vol. 46 (1997), 173-181 0 1997 The Pathological Society of Great Britain and Ireland MOLECULAR DlAG NOS IS Differentiation of Leptospira species and serovars by PCR-restriction endonuclease analysis, arbitrarily primed PCR and low-stringency PCR P. D. BROWN and P. N. LEVETT" School of Clinical Medicine and Research, University of the West Indies, and * Leptospira laboratory, Barbados, West Indies Reference strains from 30 serovars representing seven species of Leptospira and 48 recent isolates from human patients, dogs and rats, were characterised by polymerase chain reaction-restriction endonuclease analysis (PCR-REA), arbitrarily primed PCR (AP-PCR) and low stringency PCR (LS-PCR). PCR-REA analysis yielded seven groups among 29 serovars of pathogenic Leptospira; the non-pathogenic L. bzjiexa serovar patoc was not amplified with the primer pairs studied. AP-PCR and LS-PCR fingerprinting resulted in 25 and 21 distinct profiles, respectively, among the 30 reference strains. The results of the three PCR-based techniques were highly concordant and were in general agreement with those from previous DNA studies, confirming the high level of polymorphism among Leptospira species and serovars, and supported the concept of the serovar as the basic taxonomic unit of leptospiral classification. Results of the PCR- based typing methods for 11 randomised leptospiral strains, 36 clinical isolates from human patients and dogs and 12 survey isolates from trapped rats agreed with those from serological identification. With one exception, isolates of the same serovar gave identical profiles irrespective of the source. AP-PCR and LS-PCR are simple to perform and interpret, and appear to be useful for characterising isolates of Leptospira spp.