1
|
de Oliveira NR, Kremer FS, de Brito RSA, Zamboni R, Dellagostin OA, Jorge S. Pathogenesis and Genomic Analysis of a Virulent Leptospira Interrogans Serovar Copenhageni Isolated from a Dog with Lethal Infection. Trop Med Infect Dis 2022; 7:tropicalmed7110333. [PMID: 36355875 PMCID: PMC9698576 DOI: 10.3390/tropicalmed7110333] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 10/17/2022] [Accepted: 10/21/2022] [Indexed: 11/30/2022] Open
Abstract
Dogs are highly susceptible to leptospirosis and are a public health concern due to their important role as a source of spreading disease, particularly in urban settings. In this study, we present the pathogenesis, serological characterization, and complete genome sequencing of a virulent Brazilian strain (NEG7) of L. interrogans serovar Copenhageni isolated from the urine of a dog that died due to acute leptospirosis. Clinical investigation showed that the dog was presented with icteric mucous membranes, weakness, dehydration, anorexia, and kidney and liver failures. Necropsy followed by histopathological evaluation revealed lesions compatible with liver and kidney leptospirosis. The leptospires recovered from the urine were further characterized by genome analysis, which confirmed that the isolate belonged to L. interrogans serogroup icterohaemorrhagiae serovar Copenhageni. Multiple bioinformatics tools were used to characterize the genomic features, and comparisons with other available Copenhageni strains were performed. Characterization based on absence of an INDEL in the gene lic12008, associated with phylogenetic and ANI (99.99% identity) analyses, confirmed the genetic relatedness of the isolate with L. interrogans serovar Copenhageni. A better understanding of the diversity of the pathogenic Leptospira isolates could help in identifying genotypes responsible for severe infections. Moreover, it can be used to develop control and prevention strategies for Leptospira serovars associated with particular animal reservoirs.
Collapse
Affiliation(s)
- Natasha Rodrigues de Oliveira
- Centro de Desenvolvimento Tecnológico, Núcleo de Biotecnologia, Universidade Federal de Pelotas, Pelotas 96160-000, RS, Brazil
| | - Frederico Schmitt Kremer
- Centro de Desenvolvimento Tecnológico, Núcleo de Biotecnologia, Universidade Federal de Pelotas, Pelotas 96160-000, RS, Brazil
| | | | - Rosimeri Zamboni
- Faculdade de Veterinária, Universidade Federal de Pelotas, Pelotas 96160-000, RS, Brazil
| | - Odir Antônio Dellagostin
- Centro de Desenvolvimento Tecnológico, Núcleo de Biotecnologia, Universidade Federal de Pelotas, Pelotas 96160-000, RS, Brazil
- Correspondence:
| | - Sérgio Jorge
- Faculdade de Veterinária, Universidade Federal de Pelotas, Pelotas 96160-000, RS, Brazil
| |
Collapse
|
2
|
Campos CL, Gomes LR, Covarrubias AE, Kato EE, Souza GG, Vasconcellos SA, Heinemann MB, Martins EAL, Ho PL, Da Costa RMA, Da Silva JB. A Three-Dimensional Lung Cell Model to Leptospira Virulence Investigations. Curr Microbiol 2022; 79:57. [PMID: 34982247 DOI: 10.1007/s00284-021-02720-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Accepted: 11/08/2021] [Indexed: 11/30/2022]
Abstract
Leptospirosis is a worldwide zoonosis and a serious public health threat in tropical and subtropical areas. The etiologic agents of leptospirosis are pathogenic spirochetes from the genus Leptospira. In severe cases, patients develop a pulmonary hemorrhage that is associated with high fatality rates. Several animal models were established for leptospirosis studies, such as rodents, dogs, and monkeys. Although useful to study the relationship among Leptospira and its hosts, the animal models still exhibit economic and ethical limitation reasons and do not fully represent the human infection. As an attempt to bridge the gap between animal studies and clinical information from patients, we established a three-dimensional (3-D) human lung cell culture for Leptospira infection. We show that Leptospira is able to efficiently infect the cell lung spheroids and also to infiltrate in deeper areas of the cell aggregates. The ability to infect the 3-D lung cell aggregates was time-dependent. The 3-D spheroids infection occurred up to 120 h in studies with two serovars, Canicola and Copenhageni. We standardized the number of bacteria in the initial inoculum for infection of the spheroids and we also propose two alternative culture media conditions. This new approach was validated by assessing the expression of three genes of Leptospira related to virulence and motility. The transcripts of these genes increased in both culture conditions, however, in higher rates and earlier times in the 3-D culture. We also assessed the production of chemokines by the 3-D spheroids before and after Leptospira infection, confirming induction of two of them, mainly in the 3-D spheroids. Chemokine CCL2 was expressed only in the 3-D cell culture. Increasing of this chemokine was observed previously in infected animal models. This new approach provides an opportunity to study the interaction of Leptospira with the human lung epithelium in vitro.
Collapse
Affiliation(s)
- Camila L Campos
- Laboratório de Bacteriologia, Instituto Butantan, São Paulo, Brazil
| | - Luciana R Gomes
- Laboratório de Ciclo Celular-Center for Research on Toxins, Immune-Response and Cell Signaling (CeTICS), Instituto Butantan, São Paulo, Brazil
| | - Ambart E Covarrubias
- Facultad de Ciencias de la Salud, Escuela de Tecnología Médica, Universidad San Sebastian, Concepción, Chile
| | - Ellen E Kato
- Laboratorio de Fisiopatologia, Instituto Butantan, São Paulo, Brazil
| | - Gisele G Souza
- Laboratório de Zoonoses Bacterianas, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo, Brazil
| | - Silvio A Vasconcellos
- Laboratório de Zoonoses Bacterianas, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo, Brazil
| | - Marcos B Heinemann
- Laboratório de Zoonoses Bacterianas, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo, Brazil
| | | | - Paulo L Ho
- Divisão BioIndustrial, Instituto Butantan, São Paulo, Brazil
| | - Renata M A Da Costa
- Laboratório de Bacteriologia, Instituto Butantan, São Paulo, Brazil.,Global Antibiotics Research and Development Partnership (GARDP), Chemin Louis-Dunant 15, 1202, Geneva, Switzerland
| | - Josefa B Da Silva
- Laboratório de Bacteriologia, Instituto Butantan, São Paulo, Brazil.
| |
Collapse
|
3
|
Bourassi E, Savidge C, Foley P, Hartwig S. Serologic and urinary survey of exposure to Leptospira species in a feral cat population of Prince Edward Island, Canada. J Feline Med Surg 2021; 23:1155-1161. [PMID: 33719673 PMCID: PMC8637349 DOI: 10.1177/1098612x211001042] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
OBJECTIVES Recent studies show that cats could play an important role in the transmission of Leptospira species. There are few reports of leptospirosis on Prince Edward Island (PEI) and none in cats. The objective of this study was to determine the prevalence of serum antibodies against Leptospira serovars and of Leptospira DNA in the urine of a population of free-roaming cats. METHODS Paired blood and urine samples were collected from 200 cats brought to a trap-neuter-return program. Antibody titers against six Leptospira serovars (Bratislava, Canicola, Gryppotyphosa, Hardjo, Pomona, Icterohaemorrhagiae) were determined by microscopic agglutination test. PCR was performed on urine samples to identify urine shedding of Leptospira DNA. RESULTS Antibodies were detected in 20/200 cats (10%) for at least one serovar, with titers ranging from 1:50 to 1:6400 (all serovars tested, except Hardjo). Urine samples of 7/200 cats (3.5%) were PCR-positive. CONCLUSIONS AND RELEVANCE Feral cats in PEI had a higher than expected exposure to leptospirosis and can shed DNA from pathogenic Leptospira species in urine. Further studies are needed to determine the prevalence of exposure to leptospirosis in other species on PEI and the potential role of feral cats in transmission of the disease.
Collapse
Affiliation(s)
- Emilia Bourassi
- Department of Companion Animals, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, PE, Canada
| | - Christine Savidge
- Department of Companion Animals, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, PE, Canada
| | - Peter Foley
- Department of Companion Animals, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, PE, Canada
| | - Sunny Hartwig
- Department of Biomedical Sciences, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, PE, Canada
| |
Collapse
|
4
|
Yamashita R, Yoshida T, Kobayashi M, Uomoto S, Shimizu S, Takesue K, Maeda N, Hara E, Ohshima K, Zeng W, Takahashi Y, Ikeuchi A, Okamoto E, Sugiyama T, Nagakubo H, Ichikawa-Seki M, Shibutani M. Leptospiral meningoencephalitis in a raccoon dog. J Vet Diagn Invest 2021; 33:1137-1141. [PMID: 34672844 DOI: 10.1177/10406387211033583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Neuroleptospirosis is a rare disease caused by pathogenic Leptospira interrogans in humans; however, it has not been fully studied in animals. A young wild raccoon dog was found convulsing in the recumbent position and died the next day. Histologic examination revealed nonsuppurative meningoencephalitis in the cerebrum, cerebellum, midbrain, and medulla oblongata. The lesions consisted of mixed infiltrates of Iba1-positive macrophages and CD3-positive T cells, with a small number of CD79α-positive B cells and myeloperoxidase-positive neutrophils. In the frontal cortex, perivascular cuffs and adjacent microglial nodules were distributed diffusely, especially in the molecular layer. Glial nodules were comprised of Iba1- and myeloperoxidase-positive activated microglia. Immunohistochemistry revealed leptospires in mononuclear cell perivascular cuffs, but not in glial nodules. Neuroleptospirosis was accompanied by Leptospira-related nonsuppurative interstitial nephritis, pulmonary edema and hemorrhage, and coronary periarteritis, as well as Toxocara tanuki in the small intestine and nonspecific foreign-body granulomas in the lungs and stomach.
Collapse
Affiliation(s)
- Risako Yamashita
- Laboratory of Veterinary Pathology, Tokyo University of Agriculture and Technology, Tokyo, Japan
| | - Toshinori Yoshida
- Laboratory of Veterinary Pathology, Tokyo University of Agriculture and Technology, Tokyo, Japan
| | - Mio Kobayashi
- Laboratory of Veterinary Pathology, Tokyo University of Agriculture and Technology, Tokyo, Japan
| | - Suzuka Uomoto
- Laboratory of Veterinary Pathology, Tokyo University of Agriculture and Technology, Tokyo, Japan
| | - Saori Shimizu
- Laboratory of Veterinary Pathology, Tokyo University of Agriculture and Technology, Tokyo, Japan
| | - Keisuke Takesue
- Laboratory of Veterinary Pathology, Tokyo University of Agriculture and Technology, Tokyo, Japan
| | - Natsuno Maeda
- Laboratory of Veterinary Pathology, Tokyo University of Agriculture and Technology, Tokyo, Japan
| | - Erika Hara
- Laboratory of Veterinary Pathology, Tokyo University of Agriculture and Technology, Tokyo, Japan
| | - Kanami Ohshima
- Laboratory of Veterinary Pathology, Tokyo University of Agriculture and Technology, Tokyo, Japan
| | - Wen Zeng
- Laboratory of Veterinary Pathology, Tokyo University of Agriculture and Technology, Tokyo, Japan
| | - Yasunori Takahashi
- Laboratory of Veterinary Pathology, Tokyo University of Agriculture and Technology, Tokyo, Japan
| | - Aoi Ikeuchi
- Laboratory of Veterinary Parasitology, Faculty of Agriculture, Iwate University, Morioka, Japan
| | - Emi Okamoto
- Laboratory of Veterinary Parasitology, Faculty of Agriculture, Iwate University, Morioka, Japan
| | - Takutoshi Sugiyama
- Laboratory of Veterinary Parasitology, Faculty of Agriculture, Iwate University, Morioka, Japan
| | - Hiroki Nagakubo
- Laboratory of Veterinary Parasitology, Faculty of Agriculture, Iwate University, Morioka, Japan
| | - Madoka Ichikawa-Seki
- Laboratory of Veterinary Parasitology, Faculty of Agriculture, Iwate University, Morioka, Japan
| | - Makoto Shibutani
- Laboratory of Veterinary Pathology, Tokyo University of Agriculture and Technology, Tokyo, Japan
| |
Collapse
|
5
|
Santos CM, Dias GCDRS, Saldanha AVP, Esteves SB, Cortez A, Guedes IB, Heinemann MB, Gonçales AP, Miotto BA. Molecular and serological characterization of pathogenic Leptospira spp. isolated from symptomatic dogs in a highly endemic area, Brazil. BMC Vet Res 2021; 17:221. [PMID: 34154583 PMCID: PMC8215866 DOI: 10.1186/s12917-021-02930-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Accepted: 05/19/2021] [Indexed: 12/31/2022] Open
Abstract
Abstract Background Leptospirosis is an endemic zoonosis in Brazil, with a great impact on 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 confirmed in 17 dogs (54.8%) by the associated use of Polymerase Chain Reaction (PCR), Microscopic Agglutination (MAT) and bacteriological culture. Eleven dogs (35.5%) had titers ≥800, with the most frequent serogroups being Autumnalis and Icterohaemorrhagiae (n = 4 each) and Canicola (n = 2). Leptospires were recovered from four dogs, and Multilocus Sequence Analysis (MLSA) revealed infection caused by L. interrogans, which were further characterized as serogroups Canicola (n = 1) and Icterohaemorrhagiae (n = 3). Conclusion The identity of the isolates and serological pattern of MAT suggest that dogs are highly exposed to the serogroup Icterohaemorrhagiae and Canicola, also indicating possible circulation of serogroups not yet isolated in Brazil, notably serogroup Autumnalis. Our findings also reinforce the usefulness of using multiple diagnostic approaches to confirm acute canine leptospirosis.
Collapse
Affiliation(s)
| | | | | | | | | | - Israel Barbosa Guedes
- Departamento de Medicina Veterinária Preventiva e Saúde Animal, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Marcos Bryan Heinemann
- Departamento de Medicina Veterinária Preventiva e Saúde Animal, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo, SP, Brazil
| | | | | |
Collapse
|
6
|
Paz LN, Dias CS, Almeida DS, Balassiano IT, Medeiros MA, Costa F, Silva DN, Reis JN, Estrela-Lima A, Hamond C, Pinna MH. Multidisciplinary approach in the diagnosis of acute leptospirosis in dogs naturally infected by Leptospira interrogans serogroup Icterohaemorrhagiae: A prospective study. Comp Immunol Microbiol Infect Dis 2021; 77:101664. [PMID: 34091280 DOI: 10.1016/j.cimid.2021.101664] [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: 12/14/2020] [Revised: 04/05/2021] [Accepted: 04/14/2021] [Indexed: 12/01/2022]
Abstract
Leptospirosis, a zoonotic disease with worldwide distribution, is caused by spirochetes of the genus Leptospira. In dogs, this disease is frequently misdiagnosed. Few studies have attempted to associate the detection of Leptospira spp. infection with clinicopathological and renal histopathological findings using a multidisciplinary approach. The present study isolated and characterized Leptospira spp. obtained from naturally infected dogs and described relevant clinical and histopathological findings. Blood and urine were collected from 57 dogs with clinical symptomatology suggestive of leptospirosis; 38 cases were confirmed by PCR in urine or by culture or microscopic agglutination testing (titers ≥800). A total of 12 strains of pathogenic Leptospira were isolated from the studied dogs (seven in blood, four in urine and one in both blood and urine samples). All isolates were characterized as Leptospira interrogans serogroup Icterohaemorrhagiae. Of the confirmed cases, almost one-third of the animals had been vaccinated. Our analysis of laboratory testing revealed that azotemia and proteinuria were statistically significant predictors of infection. The main histopathological findings seen in kidney tissues were necrosis, degeneration, tubular regeneration, mononuclear inflammatory infiltrate and congestion. A multidisciplinary approach involving clinicopathological and histopathological characterization of renal involvement can aid in the identification of acute leptospirosis infection.
Collapse
Affiliation(s)
- Lucas Nogueira Paz
- Bacterial Disease Laboratory, Postgraduate Program in Animal Science in Tropics - Federal University of Bahia, Adhemar de Barros av, 500, 40170-110, Salvador, BA, Brazil
| | - Carla Silva Dias
- Bacterial Disease Laboratory, Postgraduate Program in Animal Science in Tropics - Federal University of Bahia, Adhemar de Barros av, 500, 40170-110, Salvador, BA, Brazil
| | - Daniela Santos Almeida
- Bacterial Disease Laboratory, Postgraduate Program in Animal Science in Tropics - Federal University of Bahia, Adhemar de Barros av, 500, 40170-110, Salvador, BA, Brazil
| | - Ilana Teruszkin Balassiano
- Bacterial Zoonoses Laboratory, Leptospirosis National Reference Center/Leptospira collection, WHO/PAHO Collaborating Center for Leptospirosis, Department of Bacteriology, Oswaldo Cruz Institute, FIOCRUZ, Brazil av, 4365, 21045-900, Rio de Janeiro, Brazil
| | - Marco Alberto Medeiros
- Laboratory of Recombinant Technology, Bio-Manguinhos, Brazilian Ministry of Health, FIOCRUZ, Av. Brazil, 4365, 21045-900, Rio de Janeiro, Brazil
| | - Federico Costa
- Collective Health Institute, UFBA, Basílio da Gama st, 40110-000, Canela, Salvador, BA, Brazil; Centro de Pesquisas Gonçalo Moniz, Fundação Oswaldo Cruz, Ministério da Saúde, Salvador, Brazil; Institute of Integrative Biology, University of Liverpool, Liverpool, UK; Department of Epidemiology of Microbial Disease, Yale School of Public Health, New Haven, CT, USA
| | - Danielle Nascimento Silva
- Department of Anatomy, Pathology and Veterinary Clinical Medicine, Federal University of Bahia, Salvador, Bahia, Brazil
| | - Joice Neves Reis
- Department of Clinical and Toxicological Analysis, School of Pharmacy, Federal University of Bahia / UFBA, Salvador, Bahia, Brazil
| | - Alessandra Estrela-Lima
- Department of Anatomy, Pathology and Veterinary Clinical Medicine, Federal University of Bahia, Salvador, Bahia, Brazil
| | - Camila Hamond
- Bacterial Disease Laboratory, Postgraduate Program in Animal Science in Tropics - Federal University of Bahia, Adhemar de Barros av, 500, 40170-110, Salvador, BA, Brazil
| | - Melissa Hanzen Pinna
- Bacterial Disease Laboratory, Postgraduate Program in Animal Science in Tropics - Federal University of Bahia, Adhemar de Barros av, 500, 40170-110, Salvador, BA, Brazil.
| |
Collapse
|
7
|
Dorsch R, Ojeda J, Salgado M, Monti G, Collado B, Tomckowiack C, Tejeda C, Müller A, Eberhard T, Klaasen HLBM, Hartmann K. Cats shedding pathogenic Leptospira spp.-An underestimated zoonotic risk? PLoS One 2020; 15:e0239991. [PMID: 33091006 PMCID: PMC7580889 DOI: 10.1371/journal.pone.0239991] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Accepted: 09/16/2020] [Indexed: 11/19/2022] Open
Abstract
Shedding of DNA of pathogenic Leptospira spp. has been documented in naturally infected cats in several countries, but urinary shedding of infectious Leptospira spp. has only recently been proven. The climate in Southern Chile is temperate rainy with high annual precipitations which represents ideal preconditions for survival of Leptospira spp., especially during spring and summer. The aims of this study were to investigate shedding of pathogenic Leptospira spp. in outdoor cats in Southern Chile, to perform molecular characterization of isolates growing in culture, and to assess potential risk factors associated with shedding. Urine samples of 231 outdoor cats from rural and urban areas in southern Chile were collected. Urine samples were investigated for pathogenic Leptospira spp. by 4 techniques: qPCR targeting the lipL32 gene, immunomagnetic separation (IMS)-coupled qPCR (IMS-qPCR), direct culture and IMS-coupled culture. Positive urine cultures were additionally confirmed by PCR. Multilocus sequence typing (MLST) was used to molecularly characterize isolates obtained from positive cultures. Overall, 36 urine samples (15.6%, 95% confidence interval (CI) 11.4-20.9) showed positive results. Eighteen (7.8%, 95% CI 4.9-12.1), 30 (13%, 95% CI 9.2-18), 3 (1.3%, 0.3-3.9) and 4 cats (1.7%; 95% CI 0.5-4.5) were positive in qPCR, IMS-qPCR, conventional culture, and IMS-coupled culture, respectively. MLST results of 7 culture-positive cats revealed sequences that could be assigned to sequence type 17 (6 cats) and sequence type 27 (1 cat) corresponding to L. interrogans (Pathogenic Leptospira Subgroup 1). Shedding of pathogenic Leptospira spp. by cats might be an underestimated source of infection for other species including humans. The present study is the first one reporting growth of leptospires from feline urine in culture in naturally infected cats in South-America and characterisation of culture-derived isolates. So far, very few cases of successful attempts to culture leptospires from naturally infected cats are described worldwide.
Collapse
Affiliation(s)
- Roswitha Dorsch
- Medizinische Kleintierklinik, Ludwig-Maximilians-Universität Munich, Munich, Germany
| | - Javier Ojeda
- Instituto de Ciencias Clínicas, Facultad de Ciencias Veterinarias, Universidad Austral de Chile, Valdivia, Chile
| | - Miguel Salgado
- Instituto de Medicina Preventiva Veterinaria, Facultad de Ciencias Veterinarias, Universidad Austral de Chile, Valdivia, Chile
| | - Gustavo Monti
- Instituto de Medicina Preventiva Veterinaria, Facultad de Ciencias Veterinarias, Universidad Austral de Chile, Valdivia, Chile
| | - Bernadita Collado
- Instituto de Medicina Preventiva Veterinaria, Facultad de Ciencias Veterinarias, Universidad Austral de Chile, Valdivia, Chile
| | - Camillo Tomckowiack
- Escuela de Graduados, Facultad de Ciencias Veterinarias, Universidad Austral de Chile, Valdivia, Chile
| | - Carlos Tejeda
- Instituto de Medicina Preventiva Veterinaria, Facultad de Ciencias Veterinarias, Universidad Austral de Chile, Valdivia, Chile
| | - Ananda Müller
- Instituto de Ciencias Clínicas, Facultad de Ciencias Veterinarias, Universidad Austral de Chile, Valdivia, Chile
| | - Theo Eberhard
- University of Applied Sciences Munich, München, Germany
| | | | - Katrin Hartmann
- Medizinische Kleintierklinik, Ludwig-Maximilians-Universität Munich, Munich, Germany
| |
Collapse
|
8
|
Zhang R, Zhou W, Ye Q, Song S, Wang Y, Xu Y, Zeng L. Comparative genomic analysis of Chinese human leptospirosis vaccine strain and circulating isolate. Hum Vaccin Immunother 2020; 16:1345-1353. [PMID: 32045318 DOI: 10.1080/21645515.2020.1720439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Abstract
LEPTOSPIRA INTERROGANS serogroup Canicola is one of the most important pathogens causing leptospirosis and is used as a vaccine strain of the current Chinese human leptospirosis vaccine. To characterize leptospiral pathogens, L. interrogans serogroup Canicola vaccine strain 611 and circulating isolate LJ178 from different hosts at different periods were sequenced using a combined strategy of Illumina X10 and PacBio technologies, and a comprehensive comparative analysis with other published Leptospira strains was conducted in this study. High levels of genomic similarities were observed between vaccine strain 611 and circulating isolate LJ178; both had two circular chromosomes and two circular extrachromosomal replicons. Compared with the strain 611 genome, 132 single nucleotide polymorphisms and 92 indels were found in strain LJ178. The larger lipopolysaccharide biosynthesis locus of serogroup Canicola was identified in both genomes. The phylogenetic analysis based on whole-genome sequences revealed that serogroup Canicola was not restricted to a specific host or geographic location, suggesting adaptive evolution associated with the ecologic diversity. In summary, our findings provide insights into a better molecular understanding of the component strains of human leptospirosis vaccine in China. Furthermore, these data detail the genetic composition and evolutionary relatedness of Leptospira strains that pose a health risk to humans.
Collapse
Affiliation(s)
- Ruipeng Zhang
- Department of Clinical Laboratory, The First Affiliated Hospital of Nanchang University , Nanchang, People's Republic of China.,Scholl of Medicine, Nanchang University , Nanchang, People's Republic of China
| | - Wenkai Zhou
- Department of Clinical Laboratory, The First Affiliated Hospital of Nanchang University , Nanchang, People's Republic of China
| | - Qiang Ye
- Key Laboratory of the Ministry of Health for Research on Quality and Standardization of Biotech Products, National Institutes of Food and Drug Control , Beijing, People's Republic of China
| | - Sichao Song
- Shanghai-MOST Key Laboratory of Health and Disease Genomics, Chinese National Human Genome Center at Shanghai , Shanghai, People's Republic of China
| | - Yuezhu Wang
- Shanghai-MOST Key Laboratory of Health and Disease Genomics, Chinese National Human Genome Center at Shanghai , Shanghai, People's Republic of China
| | - Yinghua Xu
- Key Laboratory of the Ministry of Health for Research on Quality and Standardization of Biotech Products, National Institutes of Food and Drug Control , Beijing, People's Republic of China
| | - Lingbing Zeng
- Department of Clinical Laboratory, The First Affiliated Hospital of Nanchang University , Nanchang, People's Republic of China
| |
Collapse
|
9
|
Prompiram P, Poltep K, Sangkaew N. Antibody reaction of leptospirosis in asymptomatic feral boars, Thailand. Vet World 2019; 12:1884-1887. [PMID: 32009771 PMCID: PMC6925046 DOI: 10.14202/vetworld.2019.1884-1887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Accepted: 10/17/2019] [Indexed: 11/23/2022] Open
Abstract
AIMS This study aimed to determine the proportion of exposure to leptospirosis and evaluate the degree of serovar antibody reaction in feral boars. MATERIALS AND METHODS A total of 58 sera obtained from feral boars in Khao Prathab Chang Wildlife Breeding Center, Ratchaburi, Thailand, were screened for leptospirosis exposure by microscopic agglutination test, conducted with a reference panel of 23 pathogenic serovars and a non-pathogenic serovar. RESULTS Overall exposure rate of 62.07% was found in the studied population. An antibody reaction presented in 18 of 24 leptospiral serovars. Among the seropositive, Ballum serovar showed predominant exposure in the feral boar population. CONCLUSION The results show a relatively high exposure to leptospirosis and the predominant serovar was Ballum followed by Canicola, the first finding in feral boars in Thailand. It has been revealed that feral boars act as a natural reservoir host of leptospirosis. There should be more concern about public health problems in leptospirosis arising where feral boars appear.
Collapse
Affiliation(s)
- Phirom Prompiram
- The Monitoring and Surveillance Center for Zoonotic Diseases in Wildlife and Exotic Animals, Faculty of Veterinary Science, Mahidol University, 999 Phuttamonthon 4 Rd., Salaya, Phutthamonthon, Nakhon Pathom 73170, Thailand
| | - Kanaporn Poltep
- The Monitoring and Surveillance Center for Zoonotic Diseases in Wildlife and Exotic Animals, Faculty of Veterinary Science, Mahidol University, 999 Phuttamonthon 4 Rd., Salaya, Phutthamonthon, Nakhon Pathom 73170, Thailand
| | - Nongluck Sangkaew
- Veterinary Research and Development Center Lower Northern Region, 9 Moo15 Phitsanulok-Lomsak Rd., Wangthong, Phitsanulok 65130, Thailand
| |
Collapse
|
10
|
Barbosa C, Martins G, Lilenbaum W. Infectivity and virulence of leptospiral strains of serogroup Sejroe other than Hardjo on experimentally infected hamsters. Braz J Microbiol 2019; 50:1129-1132. [PMID: 31359352 DOI: 10.1007/s42770-019-00122-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Accepted: 07/17/2019] [Indexed: 01/17/2023] Open
Abstract
To assess the virulence of leptospires from the serogroup Sejroe (from ruminants), hamsters were tested against 12 strains. Three Guaricura strains induced severe lethal disease, in contrast to the Hardjo strains. Although with the preliminary outcomes, this finding may be useful for the control of bovine leptospirosis in the Americas, where Guaricura is prevalent.
Collapse
Affiliation(s)
- Cristina Barbosa
- Laboratório de Bacteriologia Veterinária, Universidade Federal Fluminense, Rua Hernani Mello, 101, 3rd floor, São Domingos, Niterói, RJ, 24210-030, Brazil
| | - Gabriel Martins
- Laboratório de Bacteriologia Veterinária, Universidade Federal Fluminense, Rua Hernani Mello, 101, 3rd floor, São Domingos, Niterói, RJ, 24210-030, Brazil
| | - Walter Lilenbaum
- Laboratório de Bacteriologia Veterinária, Universidade Federal Fluminense, Rua Hernani Mello, 101, 3rd floor, São Domingos, Niterói, RJ, 24210-030, Brazil.
| |
Collapse
|
11
|
Bertelloni F, Cilia G, Turchi B, Pinzauti P, Cerri D, Fratini F. Epidemiology of leptospirosis in North-Central Italy: Fifteen years of serological data (2002-2016). Comp Immunol Microbiol Infect Dis 2019; 65:14-22. [PMID: 31300104 DOI: 10.1016/j.cimid.2019.04.001] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Revised: 01/22/2019] [Accepted: 04/01/2019] [Indexed: 12/15/2022]
Abstract
Leptospirosis is a re-emerging bacterial zoonosis. North-Central Italy is characterized by a geographic area that promote Leptospira circulation. Data on sero-epidemiological survey carried out from 2002 to 2016 in North-Central Italy were reported and discussed. Overall, 709 out of the 8488 (8.35%) tested sera were positive for Leptospira at the cut-off titer (1:100) and 218 (2.57%) at higher titer (≥1:400). The highest percentages of positivity was recorded for coypus (22.86%), swine (19.74%) and bovine (13.03%). Pomona and Australis resulted the serogroup more often detected, followed by Sejroe and Icterohaemorrhagiae; while, a low number of positive sera was detected for serogroups Ballum, Canicola and Tarassovi. Percentage of positive sera for each year slightly decreased from 2002 to 2008 and rose from 2009. High percentages of positive reactions were recorded in 2014 (17.23%), 2015 (19.61%) and 2016 (38.05%). In conclusion, the results of this investigation reported an increase of leptospirosis in North-Central Italy. Furthermore, several animals resulted infected as accidental hosts by unusual Leptospira serovars. These data could suggest a change in host range for some serovars, that may promote the adaptation to new hosts.
Collapse
Affiliation(s)
- Fabrizio Bertelloni
- Department of Veterinary Sciences, University of Pisa, Viale delle Piagge 2, 20159 Pisa, Italy.
| | - Giovanni Cilia
- Department of Veterinary Sciences, University of Pisa, Viale delle Piagge 2, 20159 Pisa, Italy
| | - Barbara Turchi
- Department of Veterinary Sciences, University of Pisa, Viale delle Piagge 2, 20159 Pisa, Italy
| | - Paolo Pinzauti
- Department of Veterinary Sciences, University of Pisa, Viale delle Piagge 2, 20159 Pisa, Italy
| | - Domenico Cerri
- Department of Veterinary Sciences, University of Pisa, Viale delle Piagge 2, 20159 Pisa, Italy
| | - Filippo Fratini
- Department of Veterinary Sciences, University of Pisa, Viale delle Piagge 2, 20159 Pisa, Italy
| |
Collapse
|
12
|
Zarantonelli L, Suanes A, Meny P, Buroni F, Nieves C, Salaberry X, Briano C, Ashfield N, Da Silva Silveira C, Dutra F, Easton C, Fraga M, Giannitti F, Hamond C, Macías-Rioseco M, Menéndez C, Mortola A, Picardeau M, Quintero J, Ríos C, Rodríguez V, Romero A, Varela G, Rivero R, Schelotto F, Riet-Correa F, Buschiazzo A. Isolation of pathogenic Leptospira strains from naturally infected cattle in Uruguay reveals high serovar diversity, and uncovers a relevant risk for human leptospirosis. PLoS Negl Trop Dis 2018; 12:e0006694. [PMID: 30212451 PMCID: PMC6136691 DOI: 10.1371/journal.pntd.0006694] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Accepted: 07/16/2018] [Indexed: 11/20/2022] Open
Abstract
Leptospirosis is a neglected zoonosis with worldwide distribution. The causative agents are spirochete bacteria of the Leptospira genus, displaying huge diversity of serovars, the identity of which is critical for effective diagnosis and vaccination purposes. Among many other mammalian species, Leptospira infects cattle, eliciting acute signs in calves, and chronic disease in adult animals often leading to abortions. In South America, and including in Uruguay, beef and dairy export are leading sources of national income. Despite the importance of bovine health, food safety, and bovine-related dissemination of leptospirosis to humans, extremely limited information is available as to the identity of Leptospira species and serovars infecting cattle in Uruguay and the South American subcontinent. Here we report a multicentric 3-year study resulting in the isolation and detailed characterization of 40 strains of Leptospira spp. obtained from infected cattle. Combined serologic and molecular typing identified these isolates as L. interrogans serogroup Pomona serovar Kennewicki (20 strains), L. interrogans serogroup Canicola serovar Canicola (1 strain), L. borgpetersenii serogroup Sejroe serovar Hardjo (10 strains) and L. noguchii (9 strains). The latter showed remarkable phenotypic and genetic variability, belonging to 6 distinct serogroups, including 3 that did not react with a large panel of reference serogrouping antisera. Approximately 20% of cattle sampled in the field were found to be shedding pathogenic Leptospira in their urine, uncovering a threat for public health that is being largely neglected. The two L. interrogans serovars that we isolated from cattle displayed identical genetic signatures to those of human isolates that had previously been obtained from leptospirosis patients. This report of local Leptospira strains shall improve diagnostic tools and the understanding of leptospirosis epidemiology in South America. These strains could also be used as new components within bacterin vaccines to protect against the pathogenic Leptospira strains that are actually circulating, a direct measure to reduce the risk of human leptospirosis. Several species of the genus Leptospira cause leptospirosis, a disease that is transmitted from animals to humans (zoonosis). Leptospirosis is the most extended zoonosis worldwide, with over a million human cases each year. Leptospira spp. infect a broad range of wildlife and domestic animals, including cattle. In several South American countries beef and dairy exports rank among the most important national income sources, explaining why in Uruguay cattle outnumber human population by a factor of 4. Yet, we did not know which Leptospira species and serovariants (serovars) circulate among Uruguayan cattle. Current serologic diagnostic methods and whole killed-cell vaccination approaches, critically depend on using the proper serovars, which are hugely variable in Leptospira spp. from different regions of the world. Through a multidisciplinary consortium effort, we now report the isolation and typing of 40 strains of pathogenic Leptospira spp. An unexpectedly large variation in terms of species and serovars was found. These data are extremely important: 1- to improve diagnostics by updating the available reference antigen panels; 2- to evaluate the efficacy of novel vaccines; and, 3- to implement efficacious bovine vaccination as a means of reducing the incidence of bovine and human leptospirosis.
Collapse
Affiliation(s)
- Leticia Zarantonelli
- Laboratorio de Microbiología Molecular y Estructural, Institut Pasteur de Montevideo, Montevideo, Uruguay
- Unidad Mixta UMPI, Institut Pasteur de Montevideo + Instituto Nacional de Investigación Agropecuaria INIA, Montevideo, Uruguay
| | - Alejandra Suanes
- Departamento de Bacteriología, División Laboratorios Veterinarios “Miguel C. Rubino” Sede Central, Ministerio de Ganadería, Agricultura y Pesca, Montevideo, Uruguay
| | - Paulina Meny
- Departamento de Bacteriología y Virología, Instituto de Higiene, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay
| | - Florencia Buroni
- División Laboratorios Veterinarios “Miguel C. Rubino” Laboratorio Regional Noroeste, Ministerio de Ganadería, Agricultura y Pesca, Paysandú, Uruguay
| | - Cecilia Nieves
- Laboratorio de Microbiología Molecular y Estructural, Institut Pasteur de Montevideo, Montevideo, Uruguay
| | - Ximena Salaberry
- Departamento de Bacteriología, División Laboratorios Veterinarios “Miguel C. Rubino” Sede Central, Ministerio de Ganadería, Agricultura y Pesca, Montevideo, Uruguay
| | - Carolina Briano
- División Laboratorios Veterinarios “Miguel C. Rubino” Laboratorio Regional Este, Ministerio de Ganadería, Agricultura y Pesca, Treinta y Tres, Uruguay
| | - Natalia Ashfield
- Departamento de Bacteriología y Virología, Instituto de Higiene, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay
| | - Caroline Da Silva Silveira
- Instituto Nacional de Investigación Agropecuaria INIA, Estación Experimental La Estanzuela, Colonia, Uruguay
| | - Fernando Dutra
- División Laboratorios Veterinarios “Miguel C. Rubino” Laboratorio Regional Este, Ministerio de Ganadería, Agricultura y Pesca, Treinta y Tres, Uruguay
| | - Cristina Easton
- Departamento de Bacteriología, División Laboratorios Veterinarios “Miguel C. Rubino” Sede Central, Ministerio de Ganadería, Agricultura y Pesca, Montevideo, Uruguay
| | - Martin Fraga
- Instituto Nacional de Investigación Agropecuaria INIA, Estación Experimental La Estanzuela, Colonia, Uruguay
| | - Federico Giannitti
- Instituto Nacional de Investigación Agropecuaria INIA, Estación Experimental La Estanzuela, Colonia, Uruguay
| | - Camila Hamond
- Unidad Mixta UMPI, Institut Pasteur de Montevideo + Instituto Nacional de Investigación Agropecuaria INIA, Montevideo, Uruguay
- Instituto Nacional de Investigación Agropecuaria INIA, Estación Experimental La Estanzuela, Colonia, Uruguay
| | - Melissa Macías-Rioseco
- Instituto Nacional de Investigación Agropecuaria INIA, Estación Experimental La Estanzuela, Colonia, Uruguay
| | - Clara Menéndez
- Departamento de Bacteriología y Virología, Instituto de Higiene, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay
| | - Alberto Mortola
- Departamento de Bacteriología, División Laboratorios Veterinarios “Miguel C. Rubino” Sede Central, Ministerio de Ganadería, Agricultura y Pesca, Montevideo, Uruguay
| | - Mathieu Picardeau
- Unité de Biologie des Spirochètes, Institut Pasteur, Paris, France
- Joint International Unit « Integrative Microbiology of Zoonotic Agents » IMiZA, Institut Pasteur de Montevideo, Montevideo, Uruguay / Institut Pasteur, Paris, France
| | - Jair Quintero
- Departamento de Bacteriología y Virología, Instituto de Higiene, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay
| | - Cristina Ríos
- Departamento de Bacteriología y Virología, Instituto de Higiene, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay
| | - Víctor Rodríguez
- División Laboratorios Veterinarios “Miguel C. Rubino” Laboratorio Regional Noroeste, Ministerio de Ganadería, Agricultura y Pesca, Paysandú, Uruguay
| | - Agustín Romero
- División Laboratorios Veterinarios “Miguel C. Rubino” Laboratorio Regional Este, Ministerio de Ganadería, Agricultura y Pesca, Treinta y Tres, Uruguay
| | - Gustavo Varela
- Departamento de Bacteriología y Virología, Instituto de Higiene, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay
| | - Rodolfo Rivero
- División Laboratorios Veterinarios “Miguel C. Rubino” Laboratorio Regional Noroeste, Ministerio de Ganadería, Agricultura y Pesca, Paysandú, Uruguay
- * E-mail: (RR); (FS); (FRC); (AB)
| | - Felipe Schelotto
- Departamento de Bacteriología y Virología, Instituto de Higiene, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay
- * E-mail: (RR); (FS); (FRC); (AB)
| | - Franklin Riet-Correa
- Instituto Nacional de Investigación Agropecuaria INIA, Estación Experimental La Estanzuela, Colonia, Uruguay
- * E-mail: (RR); (FS); (FRC); (AB)
| | - Alejandro Buschiazzo
- Laboratorio de Microbiología Molecular y Estructural, Institut Pasteur de Montevideo, Montevideo, Uruguay
- Joint International Unit « Integrative Microbiology of Zoonotic Agents » IMiZA, Institut Pasteur de Montevideo, Montevideo, Uruguay / Institut Pasteur, Paris, France
- Département de Microbiologie, Institut Pasteur, Paris, France
- * E-mail: (RR); (FS); (FRC); (AB)
| | | |
Collapse
|
13
|
Diagnosis of acute canine leptospirosis using multiple laboratory tests and characterization of the isolated strains. BMC Vet Res 2018; 14:222. [PMID: 30016949 PMCID: PMC6050646 DOI: 10.1186/s12917-018-1547-4] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2018] [Accepted: 07/09/2018] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Dogs presenting with acute leptospirosis may present non-specific clinical and laboratory findings, and the definitive diagnosis may require additional confirmatory tests, including bacterial culture, for the direct or indirect identification of the pathogen. The present study describes the diagnosis of leptospirosis in suspected dogs based on the use of multiple diagnostic tests, including serological, molecular and bacteriological tests, along with the characterization of the recovered leptospiral strains. RESULTS Urine, serum and blood samples were collected from 33 dogs with suspected clinical leptospirosis treated at the University of São Paulo Veterinary Hospital Service (Hovet FMVZ-USP) between 2013 and 2016. Only dogs with high blood urea nitrogen and creatinine levels in association with multiple clinical manifestations of the disease were included. Leptospiral culture, PCR and serology (Microscopic agglutination test - MAT) were performed in blood and urine samples taken from all suspected dogs at clinical presentation, and an additional prospective MAT titration was performed in seven dogs. Infection could be identified exclusively by PCR in 10 dogs (30.3%), exclusively by MAT in four dogs (12.1%) and by both tests in four dogs, totaling 18 dogs (54.5-95%CI: 37.6-71.5). Six out of eight MAT-confirmed cases presented with the highest titers against the Icterohaemorrhagiae serogroup. Leptospires were recovered from urine samples from two PCR-positive dogs, and both strains could be characterized by Multilocus Sequence Analysis and serogrouping as L. interrogans serogroup Icterohaemorrhagiae. Both isolates were shown to be pathogenic in the hamster model. CONCLUSIONS The simultaneous use of MAT and PCR was able to increase the diagnosis of leptospirosis in clinically suspected cases. Despite the increasing incidence of new serovars affecting dogs being reported in different locations, our results suggest that leptospiral strains belonging to the Icterohaemorrhagiae serogroup are still a major causative agent of canine leptospirosis in São Paulo, Brazil.
Collapse
|
14
|
Miotto BA, Guilloux AGA, Tozzi BF, Moreno LZ, da Hora AS, Dias RA, Heinemann MB, Moreno AM, Filho AFDS, Lilenbaum W, Hagiwara MK. Prospective study of canine leptospirosis in shelter and stray dog populations: Identification of chronic carriers and different Leptospira species infecting dogs. PLoS One 2018; 13:e0200384. [PMID: 29995963 PMCID: PMC6040711 DOI: 10.1371/journal.pone.0200384] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Accepted: 06/24/2018] [Indexed: 01/09/2023] Open
Abstract
Dogs are highly susceptible to the leptospiral infection, notably stray and sheltered dogs. Unsanitary conditions often observed in dog shelters may predispose the introduction and spread of leptospires among sheltered populations, potentially increasing the chances for the inadvertent adoption of asymptomatically infected animals. The present work describes a longitudinal study using a multidisciplinary approach for the identification of chronically infected dogs and the characterization of potentially pathogenic strains circulating among stray and sheltered dog populations in São Paulo, Brazil. A total of 123 dogs from three populations were included. The initial evaluation consisted of blood and urine quantitative PCR testing (qPCR), the detection of specific antibodies by microscopic agglutination test (MAT), physical examination and hematological and serum biochemistry analyses. The qPCR-positive dogs were prospectively examined, and reevaluations also included culture from urine samples. Positive qPCR samples were subjected to 16S rRNA and secY gene phylogenetic analysis. The recovered strains were characterized by Multilocus Sequence Typing, polyclonal serogroup identification and virulence determination. Leptospiruria was detected in all populations studied (13/123), and phylogenetic analysis revealed that 10 dogs had L. interrogans infection. Three dogs (3/13) had L. santarosai infection. The secY phylogenetic analysis revealed that the L. santarosai sequences clustered separately from those obtained from other hosts. Ten leptospiruric dogs were reevaluated, and three dogs presented persistent leptospiruria, allowing culturing from two dogs. The strains were characterized as L. interrogans serogroup Canicola (virulent) and L. santarosai serogroup Sejroe (not virulent). Serum samples were retested by MAT using the DU92 and DU114 strains as antigens, and no increased seroreactivity was detected. Asymptomatic L. santarosai infection was observed in all populations studied, suggesting a possible role of dogs in the chain of transmission of this leptospiral species. The results suggest a genetic distinction between lineages of Brazilian L. santarosai maintained by dogs and other animal hosts. Our findings revealed that dogs could act as maintenance hosts for distinct pathogenic Leptospira, highlighting also that asymptomatically infected dogs can be inadvertently admitted and adopted in dog shelters, potentially increasing the risks of zoonotic transmission.
Collapse
Affiliation(s)
- Bruno Alonso Miotto
- Departamento de Clínica Médica, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo, São Paulo, Brasil
- * E-mail:
| | - Aline Gil Alves Guilloux
- Departamento de Medicina Veterinária Preventiva e Saúde Animal, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo, São Paulo, Brasil
| | - Barbara Furlan Tozzi
- Departamento de Clínica Médica, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo, São Paulo, Brasil
| | - Luisa Zanolli Moreno
- Departamento de Medicina Veterinária Preventiva e Saúde Animal, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo, São Paulo, Brasil
| | - Aline Santana da Hora
- Departamento de Medicina Veterinária Preventiva e Saúde Animal, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo, São Paulo, Brasil
| | - Ricardo Augusto Dias
- Departamento de Medicina Veterinária Preventiva e Saúde Animal, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo, São Paulo, Brasil
| | - Marcos Bryan Heinemann
- Departamento de Medicina Veterinária Preventiva e Saúde Animal, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo, São Paulo, Brasil
| | - Andrea Micke Moreno
- Departamento de Medicina Veterinária Preventiva e Saúde Animal, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo, São Paulo, Brasil
| | - Antônio Francisco de Souza Filho
- Departamento de Medicina Veterinária Preventiva e Saúde Animal, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo, São Paulo, Brasil
| | - Walter Lilenbaum
- Departamento de Microbiologia e Parasitologia, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brasil
| | - Mitika Kuribayashi Hagiwara
- Departamento de Clínica Médica, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo, São Paulo, Brasil
| |
Collapse
|
15
|
Serological survey on Leptospira infection in slaughtered swine in North-Central Italy. Epidemiol Infect 2018; 146:1275-1280. [PMID: 29843827 DOI: 10.1017/s0950268818001358] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Swine can act as asymptomatic carriers of some Leptospira serovars. In this study, 1194 sera from 61 farms located in five different Regions of North-West Italy were collected from slaughtered healthy pigs. Presence of antibody against four Leptospira serovars was evaluated. Overall, 52.5% of analysed farms presented at least one positive animal and 34.4% presented at least one positive swine with titre ⩾1:400. A percentage of 16.6% sera was positive and 5.9% samples presented a positive titre ⩾1:400. Tuscany and Lombardy showed the highest percentage of positive farms (64.3% and 54.6%, respectively) and sera (28.5% and 13.3%, respectively), probably due to environmental conditions and potential risk factors, which promote maintenance and spreading of Leptospira in these areas. The main represented serogroups were Australis (21.3% positive farms, 8.2% positive sera) and Pomona (18.0% positive farms, 8.1% positive sera). In swine, these serogroups are the most detected worldwide; however, our results seem to highlight a reemerging of serogroup Pomona in pigs in investigated areas. A low percentage of sera (0.6%) scored positive to Canicola, leaving an open question on the role of pigs in the epidemiology of this serovar. Higher antibody titres were detected for serogroups Australis and Pomona. Swine leptospirosis is probably underestimated in Italy and could represent a potential risk for animal and human health.
Collapse
|
16
|
Moreno LZ, Miraglia F, Kremer FS, Eslabao MR, Dellagostin OA, Lilenbaum W, Freitas JC, Vasconcellos SA, Heinemann MB, Moreno AM. Comparative genomics of pathogenic Leptospira interrogans serovar Canicola isolated from swine and human in Brazil. Mem Inst Oswaldo Cruz 2018; 113:126-129. [PMID: 29236931 PMCID: PMC5722268 DOI: 10.1590/0074-02760170119] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2017] [Accepted: 06/26/2017] [Indexed: 12/12/2022] Open
Abstract
Leptospira interrogans serovar Canicola is one of the most important pathogenic serovars for the maintenance of urban leptospirosis. Even though it is considered highly adapted to dogs, serovar Canicola infection has already been described in other animals and even a few human cases. Here, we present the genomic characterisation of two Brazilian L. interrogans serovar Canicola strains isolated from slaughtered sows (L0-3 and L0-4) and their comparison with human strain Fiocruz LV133. It was observed that the porcine serovar Canicola strains present the genetic machinery to cause human infection and, therefore, represent a higher risk to public health. Both human and porcine serovar Canicola isolates also presented sequences with high identity to the Chinese serovar Canicola published plasmids pGui1 and pGui2. The plasmids identification in the Brazilian and Chinese serovar Canicola strains suggest that extra-chromosomal elements are one more feature of this serovar that was previously unnoticed.
Collapse
Affiliation(s)
- Luisa Z Moreno
- Laboratório de Epidemiologia Molecular e Resistência a Antimicrobianos, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo, SP, Brasil
| | - Fabiana Miraglia
- Laboratório de Bacteriologia Veterinária, Departamento de Microbiologia e Parasitologia, Universidade Federal Fluminense, Niterói, RJ, Brasil
| | - Frederico S Kremer
- Centro de Desenvolvimento Tecnológico, Universidade Federal de Pelotas, Pelotas, RS, Brasil
| | - Marcus R Eslabao
- Centro de Desenvolvimento Tecnológico, Universidade Federal de Pelotas, Pelotas, RS, Brasil
| | - Odir A Dellagostin
- Centro de Desenvolvimento Tecnológico, Universidade Federal de Pelotas, Pelotas, RS, Brasil
| | - Walter Lilenbaum
- Laboratório de Bacteriologia Veterinária, Departamento de Microbiologia e Parasitologia, Universidade Federal Fluminense, Niterói, RJ, Brasil
| | - Julio C Freitas
- Departamento de Medicina Veterinária Preventiva, Universidade Estadual de Londrina, Londrina, PR, Brasil
| | - Silvio A Vasconcellos
- Laboratório de Epidemiologia Molecular e Resistência a Antimicrobianos, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo, SP, Brasil
| | - Marcos B Heinemann
- Laboratório de Epidemiologia Molecular e Resistência a Antimicrobianos, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo, SP, Brasil
| | - Andrea M Moreno
- Laboratório de Epidemiologia Molecular e Resistência a Antimicrobianos, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo, SP, Brasil
| |
Collapse
|
17
|
Efficacy of leptospiral commercial vaccines on the protection against an autochtonous strain recovered in Brazil. Braz J Microbiol 2017; 49:347-350. [PMID: 29122476 PMCID: PMC5913823 DOI: 10.1016/j.bjm.2017.06.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Revised: 05/11/2017] [Accepted: 06/09/2017] [Indexed: 12/19/2022] Open
Abstract
In swine and bovines, leptospirosis prevention and control is carried out via vaccination of susceptible animals using bacterins. However, the efficiency of leptospirosis vaccines has been questioned. This work aimed to investigate the potency of five leptospirosis vaccines sold commercially in Brazil, challenging the animals with one autochthonous strain of Leptospira, Canicola serovar, denoted LO4, isolated from swine. The standard protocol was followed, and renal carriers of Leptospira were identified among the surviving animals by culture and PCR. Of the five vaccines tested, only two proved effective. None of the surviving animals was positive by culture; however, one animal was positive by PCR. Three of the five vaccines sold commercially in Brazil for the immunization of swine or bovines failed the test of the efficacy to protect the vaccinated animals following challenge with an autochthonous Leptospira strain, Canicola serovar. The two vaccines provided protection against the renal carrier state in the surviving animals. The criteria used to produce leptospirosis bacterins sold commercially in Brazil must be reviewed. The industry should support researches on leptospiral vaccinology to improve the quality of the present vaccines and discover new immunogenic strains, because it is known that vaccination is one of the most important tools to increase the reproduction rates in livestock.
Collapse
|
18
|
Jorge S, Schuch RA, de Oliveira NR, da Cunha CEP, Gomes CK, Oliveira TL, Rizzi C, Qadan AF, Pacce VD, Coelho Recuero AL, Soares Brod C, Dellagostin OA. Human and animal leptospirosis in Southern Brazil: A five-year retrospective study. Travel Med Infect Dis 2017; 18:46-52. [DOI: 10.1016/j.tmaid.2017.07.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Revised: 06/27/2017] [Accepted: 07/21/2017] [Indexed: 01/09/2023]
|
19
|
Phenotypic and Molecular Characterization of Leptospira interrogans Isolated from Canis familiaris in Southern Brazil. Curr Microbiol 2015; 71:496-500. [PMID: 26100241 DOI: 10.1007/s00284-015-0857-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2014] [Accepted: 05/05/2015] [Indexed: 01/15/2023]
Abstract
Leptospirosis is a zoonotic disease caused by pathogenic spirochetes from the genus Leptospira, which includes 20 species and more than 300 serovars. Canines are important hosts of pathogenic leptospires and can transmit the pathogen to humans via infected urine. Here, we report the phenotypic and molecular characterization of Leptospira interrogans isolated from Canis familiaris in Southern Brazil. The isolated strain was characterized by variable-number tandem-repeats analysis as L. interrogans, serogroup Icterohaemorrhagiae. In addition, the isolate was recognized by antibodies from human and canine serum samples previously tested by microscopic agglutination test. Ultimately, the expression of membrane-associated antigens (LipL32 and leptospiral immunoglobulin-like proteins) from pathogenic leptospires using monoclonal antibodies was detected by indirect immunofluorescence assay. In conclusion, identification of new strains of Leptospira can help in the diagnosis and control of leptospirosis.
Collapse
|
20
|
Lilenbaum W, Martins G. Leptospirosis in cattle: a challenging scenario for the understanding of the epidemiology. Transbound Emerg Dis 2014; 61 Suppl 1:63-8. [PMID: 25135465 DOI: 10.1111/tbed.12233] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2013] [Indexed: 11/29/2022]
Abstract
All over the world, leptospirosis has been reported as one of the major causes of reproductive failure in cattle and other ruminants, determining abortions, stillbirth, weak newborns and decrease in their growth rate and milk production. Nevertheless, despite its importance, it is still a challenging disease, from what scarce information about epidemiology, prophylaxis and control is available nowadays. During the last decades of the last century, many epidemiological studies have been conducted in several countries, mainly based on serology. According to those studies, a seroepidemiological scenario has been stated for different regions, where different serovars were reported for cattle. Nevertheless, a huge problem is that, when efforts are made in order to increase the collection of local strains (isolates), it has been demonstrated that the scenario that emerges from those studies contrasts with those previously determined by serology. Despite the large number of serological studies worldwide, the number of isolates is scarce. Isolation technique is a very delicate procedure that needs no contamination, fast processing and long delay to produce a positive result, what may corroborate to the lack of information for the comparison between serology versus bacteriological data, mainly in developing countries. It is noteworthy that the epidemiological scenario now acknowledged may not represent what really occurs in many parts of the world, particularly on those tropical regions where the disease is endemic. Consequently, the current knowledge about epidemiology and control, as well as the available diagnostic tools and the commercial vaccines, may not be adequate for those regions, what leads to a frustrating scenario of endemicity and difficulties on the control of the disease. Without a huge effort in the culturing of local strains, besides the advances on molecular typing, leptospirosis will not be defeated and will probably remain endemic in the developing countries, leading to important economic hazards in animal production and risks to public health in those regions.
Collapse
Affiliation(s)
- W Lilenbaum
- Laboratory of Veterinary Bacteriology, Department of Microbiology and Parasitology, Universidade Federal Fluminense, Rio de Janeiro, Brazil
| | | |
Collapse
|
21
|
Petrakovsky J, Bianchi A, Fisun H, Nájera-Aguilar P, Pereira MM. Animal leptospirosis in Latin America and the Caribbean countries: reported outbreaks and literature review (2002-2014). INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2014; 11:10770-89. [PMID: 25325360 PMCID: PMC4211005 DOI: 10.3390/ijerph111010770] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/28/2014] [Revised: 09/15/2014] [Accepted: 09/30/2014] [Indexed: 01/17/2023]
Abstract
Leptospirosis is a worldwide zoonotic disease whose transmission is linked through multiple factors in the animal-human-ecosystem interface. The data on leptospirosis reported to the World Organization for Animal Health (OIE) for Latin America and Caribbean (LAC) countries/sovereign territories from 2005-2011 were mapped, showing a wide distribution of outbreaks in the region. Tropical terrestrial biomes are the predominate ecosystems showing reports of outbreaks. Climatic and ecological factors were relevant to the occurrence of epidemic outbreaks. The available scientific information from 2002-2014 was summarized to obtain a general overview and identify key issues related to the One Health approach. The primary serological test used for diagnosis and for conducting surveys was the microscopic agglutination test (MAT). Reports regarding the isolation and typing of leptospires were scattered and limited to data from a few countries, but their results revealed considerable biodiversity at the species and serovar levels. A total of six out of 11 currently named pathogenic species were found in the region. There was also high diversity of animal species showing evidence of infection by leptospires, including rodents, pets, livestock and wild animals. Prevention and control measures for leptospirosis should consider issues of animal and human health in the context of ecosystems, the territorial land borders of countries and trade.
Collapse
Affiliation(s)
- Jessica Petrakovsky
- The National Reference Laboratory of World Organization for Animal Health, National Service of Agrifood Health and Quality (SENASA), Buenos Aires, CP C1063ACD, Argentina; E-Mails: (J.P.); (A.B.)
| | - Alejandra Bianchi
- The National Reference Laboratory of World Organization for Animal Health, National Service of Agrifood Health and Quality (SENASA), Buenos Aires, CP C1063ACD, Argentina; E-Mails: (J.P.); (A.B.)
| | - Helen Fisun
- Pan American Health Organization (PAHO)/WHO, 525, 23rd Street, N.W. Washington, DC 20037, USA; E-Mails: (H.F.); (P.N.-A.)
| | - Patricia Nájera-Aguilar
- Pan American Health Organization (PAHO)/WHO, 525, 23rd Street, N.W. Washington, DC 20037, USA; E-Mails: (H.F.); (P.N.-A.)
| | - Martha Maria Pereira
- Oswaldo Cruz Institute/FIOCRUZ, WHO Collaborating Centre for Leptospirosis, Rio de Janeiro, 21040-900, Brazil
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +55-21-2562-1610
| |
Collapse
|
22
|
Wang H, Jung YH, Son D, Choo HY. High level of genetic diversity among Steinernema monticolum in Korea revealed by single-enzyme amplified fragment length polymorphism. J Invertebr Pathol 2013; 113:146-51. [DOI: 10.1016/j.jip.2013.03.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2012] [Revised: 03/08/2013] [Accepted: 03/11/2013] [Indexed: 10/27/2022]
Affiliation(s)
- Huan Wang
- College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang 110866, China
| | | | | | | |
Collapse
|