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Wu T, Ma R, Pan X, Wang F, Zhang Z, Shi Q, Shan X, Gao G. Comparison of the efficacy of Aeromonas veronii Δ hisJ vaccine in Carassius auratus via different immunization routes. Front Vet Sci 2024; 11:1378448. [PMID: 38577546 PMCID: PMC10993147 DOI: 10.3389/fvets.2024.1378448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2024] [Accepted: 03/12/2024] [Indexed: 04/06/2024] Open
Abstract
Introdction Aeromonas veronii is a significant pathogen to various aquatic life. Infections in fish can lead to high mortality rates, causing substantial economic losses in aquaculture. Vaccination is proposed as a substitute for antibiotics in aquaculture to decrease disease-related mortality and morbidity. Our study previously constructed a hisJ-deleted strain of A. veronii, which provided protective effect to Loach. Methods To further assess the vaccine's applicability, this study evaluated its genetic stability and safety, and the immune protective effects in Carassius auratus through four distinct administration routes: intraperitoneal injection, intramuscular injection, oral administration, and immersion, to determine the efficacy of these administration routes. Results The results showed that the vaccine remained genetically stable after 45 generations. Immunization via these administration routes was safe for Carassius auratus, with intraperitoneal and intramuscular injections causing stronger adverse reactions. Immersion immunization resulted in mild adverse reactions, and no significant adverse reactions were observed following oral immunization. Immunizing Carassius auratus at safe concentrations via these routes enhanced the phagocytic activity in serum, increased the levels of non-specific immune-related enzymes (ACP, AKP, C3, C4, LZM, SOD, and IgM), and improved specific serum antibody levels. It also elevated levels of cytokines related to inflammatory responses (IL-1β, IL-10, TNF-α, TGF-β) in organ tissues (liver, spleen, kidney, mid-post intestine, and gills). The survival rates of Carassius auratus were measured after challenging with the virulent strain A. veronii TH0426, resulting in the relative survival rates of 64% for Intraperitoneal vaccine group, 56% for Intramuscular vaccine group, 52% for oral vaccine group, and 48% for immersion vaccine group. Analysis of bacterial load in the liver, spleen, and kidney post-challenge showed a decreasing trend in the control group, indicating that the vaccine strain ΔhisJ could gradually restrict the rapid proliferation of bacteria in these tissues, thereby providing a certain level of immune protection against A. veronii. Discussion In brief, the vaccine strain ΔhisJ can serve as a safe live attenuated vaccine for Carassius auratus, and this study lays the foundation for the development of live attenuated vaccines against Aeromonas veronii.
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Affiliation(s)
- Tonglei Wu
- College of Animal Science and Technology, Hebei Normal University of Science & Technology, Qinhuangdao, China
| | - Ruitao Ma
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, China
| | - Xiaoyi Pan
- Zhejiang Institute of Freshwater Fisheries, Huzhou, China
| | - Fengjie Wang
- College of Animal Science and Technology, Hebei Normal University of Science & Technology, Qinhuangdao, China
| | - Zhiqiang Zhang
- College of Animal Science and Technology, Hebei Normal University of Science & Technology, Qinhuangdao, China
| | - Qiumei Shi
- College of Animal Science and Technology, Hebei Normal University of Science & Technology, Qinhuangdao, China
| | - Xiaofeng Shan
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, China
| | - Guisheng Gao
- College of Animal Science and Technology, Hebei Normal University of Science & Technology, Qinhuangdao, China
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Shevtsov A, Cloeckaert A, Berdimuratova K, Shevtsova E, Shustov AV, Amirgazin A, Karibayev T, Kamalova D, Zygmunt MS, Ramanculov Y, Vergnaud G. Brucella abortus in Kazakhstan, population structure and comparison with worldwide genetic diversity. Front Microbiol 2023; 14:1106994. [PMID: 37032899 PMCID: PMC10073595 DOI: 10.3389/fmicb.2023.1106994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Accepted: 03/01/2023] [Indexed: 04/11/2023] Open
Abstract
Brucella abortus is the main causative agent of brucellosis in cattle, leading to severe economic consequences in agriculture and affecting public health. The zoonotic nature of the infection increases the need to control the spread and dynamics of outbreaks in animals with the incorporation of high resolution genotyping techniques. Based on such methods, B. abortus is currently divided into three clades, A, B, and C. The latter includes subclades C1 and C2. This study presents the results of whole-genome sequencing of 49 B. abortus strains isolated in Kazakhstan between 1947 and 2015 and of 36 B. abortus strains of various geographic origins isolated from 1940 to 2004. In silico Multiple Locus Sequence Typing (MLST) allowed to assign strains from Kazakhstan to subclades C1 and to a much lower extend C2. Whole-genome Single-Nucleotide Polymorphism (wgSNP) analysis of the 46 strains of subclade C1 with strains of worldwide origins showed clustering with strains from neighboring countries, mostly North Caucasia, Western Russia, but also Siberia, China, and Mongolia. One of the three Kazakhstan strains assigned to subclade C2 matched the B. abortus S19 vaccine strain used in cattle, the other two were genetically close to the 104 M vaccine strain. Bayesian phylodynamic analysis dated the introduction of B. abortus subclade C1 into Kazakhstan to the 19th and early 20th centuries. We discuss this observation in view of the history of population migrations from Russia to the Kazakhstan steppes.
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Affiliation(s)
- Alexandr Shevtsov
- National Center for Biotechnology, Astana, Kazakhstan
- *Correspondence: Alexandr Shevtsov,
| | | | | | | | | | | | | | | | | | - Yerlan Ramanculov
- National Center for Biotechnology, Astana, Kazakhstan
- School of Sciences and Humanities, Nazarbayev University, Astana, Kazakhstan
| | - Gilles Vergnaud
- Université Paris-Saclay, CEA, CNRS, Institute for Integrative Biology of the Cell (I2BC), Gif-sur-Yvette, France
- Gilles Vergnaud,
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3
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Kumari G, Doimari S, Suman Kumar M, Singh M, Singh DK. MLVA typing of Brucella melitensis and B. abortus isolates of animal and human origin from India. Anim Biotechnol 2021; 34:375-383. [PMID: 34487479 DOI: 10.1080/10495398.2021.1971685] [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: 10/20/2022]
Abstract
Brucellosis is a widely prevalent zoonotic disease of major public health significance. A collection of Brucella melitensis and Brucella abortus field isolates of animal and human origin were subjected to MLVA-15 typing followed by phylogeography studies. The MLVA-15 analysis of B. melitensis (n = 65) field isolates resulted in 48 different profiles. The panel I marker bruce45 was found to be most conserved, while the rest of the panel I markers showed low to moderate length polymorphism. Among the panel II markers, bruce04, bruce16 and bruce30 showed a high discriminatory index. The MLVA-15 typing of 13 B. abortus field isolates revealed 13 different genotypes with panel II markers showing higher discriminatory ability vis-à-vis panel I. The minimum spanning tree analysis (MST) in comparison with isolates from the international database revealed that all B. melitensis and B. abortus isolates from this study belonged to the 'Eastern Mediterranean' and the 'abortus C' lineage, respectively. The MLVA-15 typing could differentiate field isolates of B. abortus and B. melitensis originating from different regions, reaffirming the technique's potential of high resolution and suitability for local epidemiological studies. The MLVA scheme also has the advantage of comparison of local isolates with a worldwide database, allowing for phylogeographical studies.
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Affiliation(s)
- Gita Kumari
- ICAR-Indian Veterinary Research Institute, Izatnagar, India
| | - Soni Doimari
- ICAR-Indian Veterinary Research Institute, Izatnagar, India
| | - M Suman Kumar
- ICAR-Indian Veterinary Research Institute, Izatnagar, India
| | - Maninder Singh
- Faculty of Veterinary Science, Sher-e-Kashmir University of Agricultural Sciences and Technology, Chatha, Jammu, India
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Hegazy YM, Abdel-Hamid NH, Eldehiey M, Oreiby AF, Algabbary MH, Hamdy MER, Beleta EI, Martínez I, Shahein MA, García N, Eltholth M. Trans-species transmission of Brucellae among ruminants hampering brucellosis control efforts in Egypt. J Appl Microbiol 2021; 132:90-100. [PMID: 34091986 DOI: 10.1111/jam.15173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 05/27/2021] [Accepted: 06/01/2021] [Indexed: 11/28/2022]
Abstract
AIMS This study aimed to identify the genotypic fingerprinting of Brucella melitensis biovar 3 isolates from ruminants in Kafr El-Sheikh, Egypt, to compare with other peers globally and to highlight the epidemiology and potential causes of brucellosis control failure. METHODS AND RESULTS A multilocus variable-number tandem-repeat analysis (MLVA 16) was carried out on 41 B. melitensis bv3 isolates, 31 from the preferential hosts (28 sheep and three goats) and 10 from atypical hosts (nine cattle and one buffalo), identified by bacteriological and molecular techniques. MLVA-16 analysis revealed 19 genotypes with nine as singletons. The most prevalent genotypes were M3_K.E (3,5,3,13,1,1,3,3,7,43,8,7,6,7,5,3), M13_K.E (3,5,3,13,1,1,3,3,7,43,8,5,8,7,7,3) and M5_K.E (3,5,3,13,1,1,3,3,7,43,8,4,8,7,11,3) circulating between different animal species. The B. melitensis isolation from aborted cows in farms that had never reared small ruminants indicates the likelihood of cow to cow B. melitensis transmission. Different genotypes of B. melitensis could be isolated from the same animal. The local geographic distribution of genotypes showed a very close genetic relatedness with genotypes reported outside the study area. Worldwide, our genotypes were mostly related to the Western Mediterranean lineage and less likely to the America's clonal lineage. CONCLUSION There is a high genetic similarity of B. melitensis bv3 genotypes among different ruminant species, and the same animal could be infected with different genotypes. There is a high probability of spreading of B. melitensis among atypical hosts in the absence of the original hosts. The genetic relatedness of B. melitensis bv3 genotypes in the study area with other different geographic areas highlighted the national and international ruminants movement role as a potential factor for maintaining B. melitensis infection. SIGNIFICANCE AND IMPACT OF THE STUDY Further investigations are required to understand the impact of the presence of more than one genotype of B. melitensis in the same animal on the efficacy of brucellosis control strategies.
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Affiliation(s)
- Yamen Mohammed Hegazy
- Animal Medicine Department (Infectious Diseases), Faculty of Veterinary Medicine, Kafrelsheikh University, Kafr El-Sheikh, Egypt
| | - Nour Hosny Abdel-Hamid
- Brucellosis Research Department, Animal Health Research Institute, Agricultural Research Center, Giza, Egypt
| | - Mohammed Eldehiey
- Brucellosis Research Department, Animal Health Research Institute, Agricultural Research Center, Giza, Egypt
| | - Atef F Oreiby
- Animal Medicine Department (Infectious Diseases), Faculty of Veterinary Medicine, Kafrelsheikh University, Kafr El-Sheikh, Egypt
| | - Magdy Hasanian Algabbary
- Animal Medicine Department (Infectious Diseases), Faculty of Veterinary Medicine, Kafrelsheikh University, Kafr El-Sheikh, Egypt
| | - Mahmoud E R Hamdy
- Brucellosis Research Department, Animal Health Research Institute, Agricultural Research Center, Giza, Egypt
| | - Eman Ibrahim Beleta
- Brucellosis Research Department, Animal Health Research Institute, Agricultural Research Center, Giza, Egypt
| | - Irene Martínez
- VISAVET Health Surveillance Centre, Complutense University of Madrid, Madrid, Spain
| | - Momtaz Abdelhady Shahein
- Brucellosis Research Department, Animal Health Research Institute, Agricultural Research Center, Giza, Egypt
| | - Nerea García
- VISAVET Health Surveillance Centre, Complutense University of Madrid, Madrid, Spain
| | - Mahmoud Eltholth
- Hygiene and Preventive Medicine Department, Faculty of Veterinary Medicine, Kafrelsheikh University, Kafr El-Sheikh, Egypt.,Global Academy of Agriculture and Food Security, The Royal (Dick) School of Veterinary Studies and The Roslin Institute, The University of Edinburgh, Edinburgh, UK
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5
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Whatmore AM, Foster JT. Emerging diversity and ongoing expansion of the genus Brucella. INFECTION GENETICS AND EVOLUTION 2021; 92:104865. [PMID: 33872784 DOI: 10.1016/j.meegid.2021.104865] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Revised: 04/12/2021] [Accepted: 04/14/2021] [Indexed: 12/15/2022]
Abstract
Remarkable genetic diversity and breadth of host species has been uncovered in the Brucella genus over the past decade, fundamentally changing our concept of what it means to be a Brucella. From ocean fishes and marine mammals, to pond dwelling amphibians, forest foxes, desert rodents, and cave-dwelling bats, Brucella have revealed a variety of previously unknown niches. Classical microbiological techniques have been able to help us classify many of these new strains but at times have limited our ability to see the true relationships among or within species. The closest relatives of Brucella are soil bacteria and the adaptations of Brucella spp. to live intracellularly suggest that the genus has evolved to live in vertebrate hosts. Several recently discovered species appear to have phenotypes that are intermediate between soil bacteria and core Brucella, suggesting that they may represent ancestral traits that were subsequently lost in the traditional species. Remarkably, the broad relationships among Brucella species using a variety of sequence and fragment-based approaches have been upheld when using comparative genomics with whole genomes. Nonetheless, genomes are required for fine-scale resolution of many of the relationships and for understanding the evolutionary history of the genus. We expect that the coming decades will reveal many more hosts and previously unknown diversity in a wide range of environments.
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Affiliation(s)
- Adrian M Whatmore
- OIE and FAO Brucellosis Reference Laboratory, Department of Bacteriology, Animal and Plant Health Agency (APHA), Woodham Lane, Addlestone, Surrey, United Kingdom.
| | - Jeffrey T Foster
- Pathogen and Microbiome Institute, Northern Arizona University, Flagstaff, AZ, USA
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Singh M, Malik MA, Singh DK, Doimari S, Sharma R. Multilocus variable number tandem repeat analysis (MLVA)-typing of Brucella abortus isolates of India reveals limited genetic diversity. Trop Anim Health Prod 2019; 52:1187-1194. [PMID: 31713145 DOI: 10.1007/s11250-019-02110-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Accepted: 10/04/2019] [Indexed: 12/20/2022]
Abstract
Multilocus variable number tandem repeat analysis (MLVA) technique has wide applications in studying phylogenies and short-term epidemiology of pathogens. The technique has been extensively used worldwide in molecular epidemiology of Brucella genus. Only one study on this aspect is reported from India despite its economic and public health significance in country. The present study isolated B. abortus from domesticated bovines of Jammu region of Jammu and Kashmir state, India, and applied MLVA for 16 loci (MLVA-16). MLVA results were compared with the results of a previous study and with MLVA data of Indian isolates present in http://microbesgenotyping.i2bc.paris-saclay.fr/database. In the study, 136 samples from bovines (cattle and buffaloes) of 47 farms of Jammu region were processed for isolation. Eleven isolates of B. abortus biovar 1 from 6 farms were obtained. In MLVA-16 analysis, although the isolates were classified in a single cluster, 5 genotypes were obtained with a specific genotype being prevalent on each farm. The study identifies that MLVA-16 is capable to differentiate B. abortus strains in an area having high genetic similarity among isolates. On comparing the results with previous study and database, the isolates were found to have high genetic similarity indicating that the genetic diversity of B. abortus in India is very limited. It probably indicates that India is contaminated recently with B. abortus. To test this hypothesis, analysis of whole genome sequencing data of diverse collection of Indian B. abortus strains is required.
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Affiliation(s)
- Maninder Singh
- Division of Veterinary Public Health and Epidemiology, Faculty of Veterinary Science and Animal Husbandry, Sher-e-Kashmir University of Agricultural Sciences and Technology of Jammu, R.S.Pura, Jammu, Jammu and Kashmir, 181102, India.
| | - Mohd Ashraf Malik
- Division of Veterinary Public Health and Epidemiology, Faculty of Veterinary Science and Animal Husbandry, Sher-e-Kashmir University of Agricultural Sciences and Technology of Jammu, R.S.Pura, Jammu, Jammu and Kashmir, 181102, India
| | - Dhirender Kumar Singh
- Division of Veterinary Public Health, Indian Veterinary Research Institute, Izzatnagar, Bareilly, Uttar Pradesh, 243122, India
| | - Soni Doimari
- Division of Veterinary Public Health, Indian Veterinary Research Institute, Izzatnagar, Bareilly, Uttar Pradesh, 243122, India
| | - Rohini Sharma
- Division of Veterinary Public Health and Epidemiology, Faculty of Veterinary Science and Animal Husbandry, Sher-e-Kashmir University of Agricultural Sciences and Technology of Jammu, R.S.Pura, Jammu, Jammu and Kashmir, 181102, India
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7
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Liu ZG, Di DD, Wang M, Liu RH, Zhao HY, Piao DR, Tian GZ, Fan WX, Jiang H, Cui BY, Xia XZ. MLVA Genotyping Characteristics of Human Brucella melitensis Isolated from Ulanqab of Inner Mongolia, China. Front Microbiol 2017; 8:6. [PMID: 28149294 PMCID: PMC5241320 DOI: 10.3389/fmicb.2017.00006] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2016] [Accepted: 01/03/2017] [Indexed: 11/13/2022] Open
Abstract
Brucellosis is a serious public health problem in Ulanqab, which is a region located in the middle of the Inner Mongolia Autonomous Region adjacent to Shanxi and Hebei provinces. The disease is prevalent in both the latter provinces and Ulanqab with the highest prevalence of brucellosis occurring in Inner Mongolia. The MLVA-16 scheme is a genotyping tool for assessing genetic diversity and relationships among isolates. Moreover, this genotyping tool can also be applied to epidemiological trace-back investigations. This study reports the occurrence of at least two B. melitensis biovars (1 and 3) in Ulanqab, encompassing 22 and 94 isolates, respectively. B. melitensis biovar 3 was the predominant biovar in the area examined. Panel 1 (MLVA-8) identified three genotypes (42, 63, and 114), with genotype 42 (n = 101) representing 87% of the tested strains. MLVA-11 identified eight genotypes (116, 111, 297, 291, and 342-345) from 116 of the analyzed isolates. All of these isolates were identified as belonging to the East Mediterranean group. Genotype 116 (n = 94) was the predominant genotype and represented 81% of the isolates. The isolates pertaining to this genotype were distributed throughout most of Ulanqab and neighboring regions. The MLVA-16 scheme showed the presence of 69 genotypes, with 46 genotypes being represented by single isolates. This analysis revealed that Ulanqab brucellosis cases had epidemiologically unrelated and sporadic characteristics. The remaining 23 genotypes were shared (between a total of 70 isolates) with each genotype being represented by two to eight isolates. These data indicate that these cases were epidemiologically related. MLVA genotyping confirmed the occurrence of a multipoint outbreak epidemic and intrafamilial brucellosis. Extensive genotype-sharing events were observed among isolates from different regions of Ulanqab and from other provinces of China. These findings suggest either a lack of control of animal movement between different regions or the circulation of contaminated animal products in the market. Our study is the first comprehensive genotyping and genetic analysis of B. melitensis in Ulanqab. We believe that this study will help to improve the effectiveness of brucellosis control programs.
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Affiliation(s)
- Zhi-Guo Liu
- College of Veterinary Medical Inner Mongolia Agriculture UniversityHohhot, China; Ulanqab Centre for Endemic Disease Prevention and Control, Health and Family Planning Commission of UlanqabJining, China
| | - Dong-Dong Di
- Laboratory of Zoonoses, China Animal Health and Epidemiology Center MOA, Qingdao, China
| | - Miao Wang
- Ulanqab Centre for Endemic Disease Prevention and Control, Health and Family Planning Commission of Ulanqab Jining, China
| | - Ri-Hong Liu
- Ulanqab Centre for Endemic Disease Prevention and Control, Health and Family Planning Commission of Ulanqab Jining, China
| | - Hong-Yan Zhao
- State Key Laboratory for Infectious Disease Prevention and Control, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Disease, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention Beijing, China
| | - Dong-Ri Piao
- State Key Laboratory for Infectious Disease Prevention and Control, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Disease, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention Beijing, China
| | - Guo-Zhong Tian
- State Key Laboratory for Infectious Disease Prevention and Control, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Disease, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention Beijing, China
| | - Wei-Xing Fan
- Laboratory of Zoonoses, China Animal Health and Epidemiology Center MOA, Qingdao, China
| | - Hai Jiang
- State Key Laboratory for Infectious Disease Prevention and Control, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Disease, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention Beijing, China
| | - Bu-Yun Cui
- State Key Laboratory for Infectious Disease Prevention and Control, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Disease, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention Beijing, China
| | - Xian-Zhu Xia
- College of Veterinary Medical Inner Mongolia Agriculture UniversityHohhot, China; Institute of Military Veterinary AMMSChangchun, China
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Shevtsova E, Shevtsov A, Mukanov K, Filipenko M, Kamalova D, Sytnik I, Syzdykov M, Kuznetsov A, Akhmetova A, Zharova M, Karibaev T, Tarlykov P, Ramanculov E. Epidemiology of Brucellosis and Genetic Diversity of Brucella abortus in Kazakhstan. PLoS One 2016; 11:e0167496. [PMID: 27907105 PMCID: PMC5132193 DOI: 10.1371/journal.pone.0167496] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Accepted: 11/15/2016] [Indexed: 01/06/2023] Open
Abstract
Brucellosis is a major zoonotic infection in Kazakhstan. However, there is limited data on its incidence in humans and animals, and the genetic diversity of prevalent strains is virtually unstudied. Additionally, there is no detailed overview of Kazakhstan brucellosis control and eradication programs. Here, we analyzed brucellosis epidemiological data, and assessed the effectiveness of eradication strategies employed over the past 70 years to counteract this infection. We also conducted multiple loci variable-number tandem repeat analysis (MLVA) of Brucella abortus strains found in Kazakhstan. We analyzed official data on the incidence of animal brucellosis in Kazakhstan. The records span more than 70 years of anti-brucellosis campaigns, and contain a brief description of the applied control strategies, their effectiveness, and their impact on the incidence in humans. The MLVA-16 method was used to type 94 strains of B. abortus and serial passages of B. abortus 82, a strain used in vaccines. MLVA-8 and MLVA-11 analyses clustered strains into a total of four and seven genotypes, respectively; it is the first time that four of these genotypes have been described. MLVA-16 analysis divided strains into 28 distinct genotypes having genetic similarity coefficient that varies from 60 to100% and a Hunter & Gaston diversity index of 0.871. MST analysis reconstruction revealed clustering into "Kazakhstani-Chinese (Central Asian)", "European" and "American" lines. Detection of multiple genotypes in a single outbreak confirms that poorly controlled trade of livestock plays a crucial role in the spread of infection. Notably, the MLVA-16 profile of the B. abortus 82 strain was unique and did not change during 33 serial passages. MLVA genotyping may thus be useful for epidemiological monitoring of brucellosis, and for tracking the source(s) of infection. We suggest that countrywide application of MLVA genotyping would improve the control of brucellosis in Kazakhstan.
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Affiliation(s)
| | | | - Kasim Mukanov
- National Center for Biotechnology, Astana, Kazakhstan
| | - Maxim Filipenko
- National Center for Biotechnology, Astana, Kazakhstan
- Institute of Chemical Biology and Fundamental Medicine, Novosibirsk, Russian Federation
- Novosibirsk State University, Novosibirsk, Russian Federation
| | | | - Igor Sytnik
- National Reference Center for Veterinary, Astana, Kazakhstan
| | - Marat Syzdykov
- Kazakh Scientific Center of Quarantine and Zoonotic Diseases named by Masgut Aykimbayev, Almaty, Kazakhstan
| | - Andrey Kuznetsov
- Kazakh Scientific Center of Quarantine and Zoonotic Diseases named by Masgut Aykimbayev, Almaty, Kazakhstan
| | - Assel Akhmetova
- National Reference Center for Veterinary, Astana, Kazakhstan
| | - Mira Zharova
- National Reference Center for Veterinary, Astana, Kazakhstan
| | - Talgat Karibaev
- National Reference Center for Veterinary, Astana, Kazakhstan
| | | | - Erlan Ramanculov
- National Center for Biotechnology, Astana, Kazakhstan
- School of Science and Technology Nazarbayev University, Astana, Kazakhstan
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9
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Issa MN, Ashhab Y. Identification of Brucella melitensis Rev.1 vaccine-strain genetic markers: Towards understanding the molecular mechanism behind virulence attenuation. Vaccine 2016; 34:4884-4891. [DOI: 10.1016/j.vaccine.2016.08.059] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2016] [Revised: 08/16/2016] [Accepted: 08/22/2016] [Indexed: 01/19/2023]
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Duvnjak S, Račić I, Špičić S, Zdelar-Tuk M, Reil I, Cvetnić Ž. Characterisation of Brucella suis isolates from Southeast Europe by multi-locus variable-number tandem repeat analysis. Vet Microbiol 2015; 180:146-50. [PMID: 26324171 DOI: 10.1016/j.vetmic.2015.08.013] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2014] [Revised: 07/23/2015] [Accepted: 08/14/2015] [Indexed: 10/23/2022]
Abstract
Porcine brucellosis is a common bacterial zoonosis which can cause significant financial losses. Its diverse and often complicated factors have hampered efforts to control disease spread. The aim of the study was to assess the epidemiological situation of porcine brucellosis primarily in Croatia and its relationship to genotypes present in other, mostly European countries. One hundred and seven Brucella suis strains isolated from swine, hares, cattle, humans, wild hares, a wild boar and a mare originating mainly from Croatia (112), but also a few from Slovenia, Bosnia and Herzegovina, Serbia and Macedonia (15) were tested using classical microbiological testing, Bruce-ladder, RFLP, Multiplex-suis and genotyped using multi-locus variable-number tandem repeat analysis (MLVA). We determined 43 Brucella suis genotypes. Strains were grouped according to phylogenetic and geographic relationships, revealing both regional specificity and uniqueness and suggesting possible sources and modes of spread among animals. Our study also confirmed problems with Bruce19 locus that may hinder comparisons of new types with those in the international database. Forty-one novel genotypes were identified and deposited into the international database. Our study supports the idea of wild animals as a source of disease in domestic animals and also gives evidence to hypothesis of cross-border animal trafficking between former Yugoslavian countries. It also highlights the need to expand such research across more of southeast Europe, especially to countries with poorer social and economical situation in order to prevent a realistic outbreak and for better understanding of the biology of this pathogen.
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Affiliation(s)
- Sanja Duvnjak
- Croatian Veterinary Institute, Department for Bacteriology and Parasitology, Laboratory for Bacterial Zoonoses and Molecular Diagnosis of Bacterial Diseases, Savska cesta 143, 10000 Zagreb, Croatia.
| | - Ivana Račić
- Croatian Veterinary Institute, Department for Bacteriology and Parasitology, Laboratory for Bacterial Zoonoses and Molecular Diagnosis of Bacterial Diseases, Savska cesta 143, 10000 Zagreb, Croatia.
| | - Silvio Špičić
- Croatian Veterinary Institute, Department for Bacteriology and Parasitology, Laboratory for Bacterial Zoonoses and Molecular Diagnosis of Bacterial Diseases, Savska cesta 143, 10000 Zagreb, Croatia.
| | - Maja Zdelar-Tuk
- Croatian Veterinary Institute, Department for Bacteriology and Parasitology, Laboratory for Bacterial Zoonoses and Molecular Diagnosis of Bacterial Diseases, Savska cesta 143, 10000 Zagreb, Croatia.
| | - Irena Reil
- Croatian Veterinary Institute, Department for Bacteriology and Parasitology, Laboratory for Bacterial Zoonoses and Molecular Diagnosis of Bacterial Diseases, Savska cesta 143, 10000 Zagreb, Croatia.
| | - Željko Cvetnić
- Croatian Veterinary Institute, Department for Bacteriology and Parasitology, Laboratory for Bacterial Zoonoses and Molecular Diagnosis of Bacterial Diseases, Savska cesta 143, 10000 Zagreb, Croatia.
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11
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Dorneles EMS, Sriranganathan N, Lage AP. Recent advances in Brucella abortus vaccines. Vet Res 2015; 46:76. [PMID: 26155935 PMCID: PMC4495609 DOI: 10.1186/s13567-015-0199-7] [Citation(s) in RCA: 103] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2014] [Accepted: 05/05/2015] [Indexed: 01/18/2023] Open
Abstract
Brucella abortus vaccines play a central role in bovine brucellosis control/eradication programs and have been successfully used worldwide for decades. Strain 19 and RB51 are the approved B. abortus vaccines strains most commonly used to protect cattle against infection and abortion. However, due to some drawbacks shown by these vaccines much effort has been undertaken for the development of new vaccines, safer and more effective, that could also be used in other susceptible species of animals. In this paper, we present a review of the main aspects of the vaccines that have been used in the brucellosis control over the years and the current research advances in the development of new B. abortus vaccines.
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Affiliation(s)
- Elaine M S Dorneles
- Departamento de Medicina Veterinária Preventiva, Escola de Veterinária, Laboratório de Bacteriologia Aplicada, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil.
| | - Nammalwar Sriranganathan
- Department of Biomedical Sciences and Pathobiology, Center for Molecular Medicine and Infectious Diseases, Regional College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA.
| | - Andrey P Lage
- Departamento de Medicina Veterinária Preventiva, Escola de Veterinária, Laboratório de Bacteriologia Aplicada, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil.
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12
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Whatmore AM, Davison N, Cloeckaert A, Al Dahouk S, Zygmunt MS, Brew SD, Perrett LL, Koylass MS, Vergnaud G, Quance C, Scholz HC, Dick EJ, Hubbard G, Schlabritz-Loutsevitch NE. Brucella papionis sp. nov., isolated from baboons (Papio spp.). Int J Syst Evol Microbiol 2014; 64:4120-4128. [PMID: 25242540 DOI: 10.1099/ijs.0.065482-0] [Citation(s) in RCA: 125] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Two Gram-negative, non-motile, non-spore-forming coccoid bacteria (strains F8/08-60(T) and F8/08-61) isolated from clinical specimens obtained from baboons (Papio spp.) that had delivered stillborn offspring were subjected to a polyphasic taxonomic study. On the basis of 16S rRNA gene sequence similarities, both strains, which possessed identical sequences, were assigned to the genus Brucella. This placement was confirmed by extended multilocus sequence analysis (MLSA), where both strains possessed identical sequences, and whole-genome sequencing of a representative isolate. All of the above analyses suggested that the two strains represent a novel lineage within the genus Brucella. The strains also possessed a unique profile when subjected to the phenotyping approach classically used to separate species of the genus Brucella, reacting only with Brucella A monospecific antiserum, being sensitive to the dyes thionin and fuchsin, being lysed by bacteriophage Wb, Bk2 and Fi phage at routine test dilution (RTD) but only partially sensitive to bacteriophage Tb, and with no requirement for CO2 and no production of H2S but strong urease activity. Biochemical profiling revealed a pattern of enzyme activity and metabolic capabilities distinct from existing species of the genus Brucella. Molecular analysis of the omp2 locus genes showed that both strains had a novel combination of two highly similar omp2b gene copies. The two strains shared a unique fingerprint profile of the multiple-copy Brucella-specific element IS711. Like MLSA, a multilocus variable number of tandem repeat analysis (MLVA) showed that the isolates clustered together very closely, but represent a distinct group within the genus Brucella. Isolates F8/08-60(T) and F8/08-61 could be distinguished clearly from all known species of the genus Brucella and their biovars by both phenotypic and molecular properties. Therefore, by applying the species concept for the genus Brucella suggested by the ICSP Subcommittee on the Taxonomy of Brucella, they represent a novel species within the genus Brucella, for which the name Brucella papionis sp. nov. is proposed, with the type strain F8/08-60(T) ( = NCTC 13660(T) = CIRMBP 0958(T)).
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Affiliation(s)
- Adrian M Whatmore
- OIE/WHO/FAO Brucellosis Reference Laboratory, Department of Bacteriology, Animal Health and Veterinary Laboratories Agency (AHVLA), Woodham Lane, Addlestone KT15 3NB, UK
| | - Nicholas Davison
- Animal Health and Veterinary Laboratories Agency (AHVLA), Polwhele, Truro TR4 9AD, UK
| | - Axel Cloeckaert
- Université François Rabelais de Tours, UMR1282 Infectiologie et Santé Publique, F-37000 Tours, France.,INRA, UMR1282 Infectiologie et Santé Publique, F-37380 Nouzilly, France
| | - Sascha Al Dahouk
- Federal Institute for Risk Assessment (BfR), Diedersdorfer Weg 1, D-12277 Berlin, Germany
| | - Michel S Zygmunt
- Université François Rabelais de Tours, UMR1282 Infectiologie et Santé Publique, F-37000 Tours, France.,INRA, UMR1282 Infectiologie et Santé Publique, F-37380 Nouzilly, France
| | - Simon D Brew
- OIE/WHO/FAO Brucellosis Reference Laboratory, Department of Bacteriology, Animal Health and Veterinary Laboratories Agency (AHVLA), Woodham Lane, Addlestone KT15 3NB, UK
| | - Lorraine L Perrett
- OIE/WHO/FAO Brucellosis Reference Laboratory, Department of Bacteriology, Animal Health and Veterinary Laboratories Agency (AHVLA), Woodham Lane, Addlestone KT15 3NB, UK
| | - Mark S Koylass
- OIE/WHO/FAO Brucellosis Reference Laboratory, Department of Bacteriology, Animal Health and Veterinary Laboratories Agency (AHVLA), Woodham Lane, Addlestone KT15 3NB, UK
| | - Gilles Vergnaud
- DGA/MRIS - Mission pour la Recherche et l'Innovation Scientifique, F-92221 Bagneux, France.,CNRS, F-91405 Orsay, France.,Université Paris-Sud, Institut de Génétique et Microbiologie, UMR 8621, F-91405 Orsay, France
| | - Christine Quance
- Mycobacteria and Brucella Section, National Veterinary Services Laboratories, USDA-APHIS, Ames, 1920 Dayton Ave, Ames, IA 50010, USA
| | - Holger C Scholz
- Bundeswehr Institute of Microbiology, Neuherbergstrasse 11, D-80937 Munich, Germany
| | - Edward J Dick
- Southwest National Primate Research Center, Texas Biomedical Research Institute, San Antonio, TX, USA
| | - Gene Hubbard
- Department of Pathology, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
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13
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Dorneles EMS, Freire GN, Dasso MG, Poester FP, Lage AP. Genetic diversity of Brucella ovis isolates from Rio Grande do Sul, Brazil, by MLVA16. BMC Res Notes 2014; 7:447. [PMID: 25015223 PMCID: PMC4124495 DOI: 10.1186/1756-0500-7-447] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2014] [Accepted: 07/01/2014] [Indexed: 11/10/2022] Open
Abstract
Background Ovine epididymitis is predominantly associated with Brucella ovis infection. Molecular characterization of Brucella spp. achieved by multi-locus variable number of tandem repeats (VNTR) analyses (MLVA) have proved to be a powerful tool for epidemiological trace-back studies. Thus, the aim of this study was to evaluate the genetic diversity of Brucella ovis isolates from Rio Grande do Sul State, Brazil, by MLVA16. Findings MLVA16 genotyping identified thirteen distinct genotypes and a Hunter-Gaston diversity index of 0.989 among the fourteen B. ovis genotyped strains. All B. ovis MLVA16 genotypes observed in the present study represented non-previously described profiles. Analyses of the eight conserved loci included in panel 1 (MLVA8) showed three different genotypes, two new and one already described for B. ovis isolates. Among ten B. ovis isolates from same herd only two strains had identical pattern, whereas the four isolates with no epidemiologic information exhibited a single MLVA16 pattern each. Analysis of minimal spanning tree, constructed using the fourteen B. ovis strains typed in this study together with all nineteen B. ovis MLVA16 genotypes available in the MLVAbank 2014, revealed the existence of two clearly distinct major clonal complexes. Conclusions In conclusion, the results of the present study showed a high genetic diversity among B. ovis field isolates from Rio Grande do Sul State, Brazil, by MLVA16.
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Affiliation(s)
| | | | | | | | - Andrey P Lage
- Departamento de Medicina Veterinária Preventiva, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil.
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14
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Dorneles EMS, Santana JA, Alves TM, Pauletti RB, Mol JPDS, Heinemann MB, Lage AP. Genetic stability of Brucella abortus isolates from an outbreak by multiple-locus variable-number tandem repeat analysis (MLVA16). BMC Microbiol 2014; 14:186. [PMID: 25015840 PMCID: PMC4112982 DOI: 10.1186/1471-2180-14-186] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2014] [Accepted: 06/25/2014] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Brucellosis caused by Brucella abortus is one of the most important zoonoses in the world. Multiple-locus variable-number tandem repeat analysis (MLVA16) has been shown be a useful tool to epidemiological traceback studies in B. abortus infection. Thus, the present study aimed (i) to evaluate the genetic diversity of B. abortus isolates from a brucellosis outbreak, and (ii) to investigate the in vivo stability of the MLVA16 markers. RESULTS Three-hundred and seventy-five clinical samples, including 275 vaginal swabs and 100 milk samples, were cultured from a brucellosis outbreak in a cattle herd, which adopted RB51 vaccination and test-and-slaughter policies. Thirty-seven B. abortus isolates were obtained, eight from milk and twenty-nine from post-partum/abortion vaginal swabs, which were submitted to biotyping and genotyping by MLVA16. Twelve B. abortus isolates obtained from vaginal swabs were identified as RB51. Twenty four isolates, seven obtained from milk samples and seventeen from vaginal swabs, were identified as B. abortus biovar 3, while one isolate from vaginal swabs was identified as B. abortus biovar 1. Three distinct genotypes were observed during the brucellosis outbreak: RB observed in all isolates identified as RB51; W observed in all B. abortus biovar 3 isolates; and Z observed in the single B. abortus biovar 1 isolate. Epidemiological and molecular data show that the B. abortus biovar 1 genotype Z strain is not related to the B. abortus biovar 3 genotype W isolates, and represents a new introduction B. abortus during the outbreak. CONCLUSIONS The results of the present study on typing of multiple clinical B. abortus isolates from the same outbreak over a sixteen month period indicate the in vivo stability of MLVA16 markers, a low genetic diversity among B. abortus isolates and the usefulness of MLVA16 for epidemiological studies of bovine brucellosis.
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Affiliation(s)
| | | | | | | | | | | | - Andrey Pereira Lage
- Laboratório de Bacteriologia Aplicada, Departamento de Medicina Veterinária Preventiva, Escola de Veterinária, Universidade Federal de Minas Gerais, Av, Antônio Carlos, 6627, Caixa Postal 567, 31270-901 Belo Horizonte, MG, Brazil.
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15
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Mick V, Le Carrou G, Corde Y, Game Y, Jay M, Garin-Bastuji B. Brucella melitensis in France: persistence in wildlife and probable spillover from Alpine ibex to domestic animals. PLoS One 2014; 9:e94168. [PMID: 24732322 PMCID: PMC3986073 DOI: 10.1371/journal.pone.0094168] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2013] [Accepted: 03/12/2014] [Indexed: 11/19/2022] Open
Abstract
Bovine brucellosis is a major zoonosis, mainly caused by Brucella abortus, more rarely by Brucella melitensis. France has been bovine brucellosis officially-free since 2005 with no cases reported in domestic/wild ruminants since 2003. In 2012, bovine and autochthonous human cases due to B. melitensis biovar 3 (Bmel3) occurred in the French Alps. Epidemiological investigations implemented in wild and domestic ruminants evidenced a high seroprevalence (>45%) in Alpine ibex (Capra ibex); no cases were disclosed in other domestic or wild ruminants, except for one isolated case in a chamois (Rupicapra rupicapra). These results raised the question of a possible persistence/emergence of Brucella in wildlife. The purpose of this study was to assess genetic relationships among the Bmel3 strains historically isolated in humans, domestic and wild ruminants in Southeastern France, over two decades, by the MLVA-panel2B assay, and to propose a possible explanation for the origin of the recent bovine and human infections. Indeed, this genotyping strategy proved to be efficient for this microepidemiological investigation using an interpretation cut-off established for a fine-scale setting. The isolates, from the 2012 domestic/human outbreak harbored an identical genotype, confirming a recent and direct contamination from cattle to human. Interestingly, they clustered not only with isolates from wildlife in 2012, but also with local historical domestic isolates, in particular with the 1999 last bovine case in the same massif. Altogether, our results suggest that the recent bovine outbreak could have originated from the Alpine ibex population. This is the first report of a B. melitensis spillover from wildlife to domestic ruminants and the sustainability of the infection in Alpine ibex. However, this wild population, reintroduced in the 1970s in an almost closed massif, might be considered as a semi-domestic free-ranging herd. Anthropogenic factors could therefore account with the high observed intra-species prevalence.
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Affiliation(s)
- Virginie Mick
- Paris-Est University/Anses, EU/OIE/FAO & National Reference Laboratory for Brucellosis, Animal Health Laboratory, Maisons-Alfort, France
| | - Gilles Le Carrou
- Paris-Est University/Anses, EU/OIE/FAO & National Reference Laboratory for Brucellosis, Animal Health Laboratory, Maisons-Alfort, France
| | - Yannick Corde
- Paris-Est University/Anses, EU/OIE/FAO & National Reference Laboratory for Brucellosis, Animal Health Laboratory, Maisons-Alfort, France
| | - Yvette Game
- Departmental Veterinary Laboratory of Savoie (LDAV 73), Chambery, France
| | - Maryne Jay
- Paris-Est University/Anses, EU/OIE/FAO & National Reference Laboratory for Brucellosis, Animal Health Laboratory, Maisons-Alfort, France
| | - Bruno Garin-Bastuji
- Paris-Est University/Anses, EU/OIE/FAO & National Reference Laboratory for Brucellosis, Animal Health Laboratory, Maisons-Alfort, France
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16
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Minharro S, Silva Mol JP, Dorneles EMS, Pauletti RB, Neubauer H, Melzer F, Poester FP, Dasso MG, Pinheiro ES, Soares Filho PM, Santos RL, Heinemann MB, Lage AP. Biotyping and genotyping (MLVA16) of Brucella abortus isolated from cattle in Brazil, 1977 to 2008. PLoS One 2013; 8:e81152. [PMID: 24324670 PMCID: PMC3855697 DOI: 10.1371/journal.pone.0081152] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2013] [Accepted: 10/17/2013] [Indexed: 11/28/2022] Open
Abstract
Brucellosis is a worldwide distributed zoonosis that causes important economic losses to animal production. In Brazil, information on the distribution of biovars and genotypes of Brucella spp. is scarce or unavailable. This study aimed (i) to biotype and genotype 137 Brazilian cattle isolates (from 1977 to 2008) of B. abortus and (ii) to analyze their distribution. B. abortus biovars 1, 2 and 3 (subgroup 3b) were confirmed and biovars 4 and 6 were first described in Brazil. Genotyping by the panel 1 revealed two groups, one clustering around genotype 40 and another around genotype 28. Panels 2A and 2B disclosed a high diversity among Brazilian B. abortus strains. Eighty-nine genotypes were found by MLVA16. MLVA16 panel 1 and 2 showed geographic clustering of some genotypes. Biotyping and MLVA16 genotyping of Brazilian B. abortus isolates were useful to better understand the epidemiology of bovine brucellosis in the region.
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Affiliation(s)
- Sílvia Minharro
- Departamento de Medicina Veterinária Preventiva, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
- Escola de Medicina Veterinária e Zootecnia, Universidade Federal do Tocantins, Araguaína, Tocantins, Brazil
| | - Juliana P. Silva Mol
- Departamento de Medicina Veterinária Preventiva, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Elaine M. S. Dorneles
- Departamento de Medicina Veterinária Preventiva, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Rebeca B. Pauletti
- Departamento de Medicina Veterinária Preventiva, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Heinrich Neubauer
- Friedrich-Loeffler-Institut, Bundesforschungsinstitut für Tiergesundheit, Institut für bakterielle Infektionen und Zoonosen, Jena, Germany
| | - Falk Melzer
- Friedrich-Loeffler-Institut, Bundesforschungsinstitut für Tiergesundheit, Institut für bakterielle Infektionen und Zoonosen, Jena, Germany
| | - Fernando P. Poester
- Departamento de Medicina Veterinária Preventiva, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Maurício G. Dasso
- Fundação Estadual de Pesquisa Agropecuária, Instituto de Pesquisas Veterinárias Desidério Finamor, Eldorado do Sul, Rio Grande do Sul, Brazil
| | - Elaine S. Pinheiro
- Instituto Biológico, Centro de Pesquisa e Desenvolvimento de Sanidade Animal, São Paulo, São Paulo, Brazil
| | - Paulo M. Soares Filho
- Laboratório Nacional Agropecuário, Ministério da Agricultura, Pecuária e Abastecimento, Pedro Leopoldo, Minas Gerais, Brazil
| | - Renato L. Santos
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Marcos B. Heinemann
- Departamento de Medicina Veterinária Preventiva, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Andrey P. Lage
- Departamento de Medicina Veterinária Preventiva, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
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17
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Dorneles EMS, de Faria APP, Pauletti RB, Santana JA, Caldeira GAV, Heinemann MB, Titze-de-Almeida R, Lage AP. Genetic stability of Brucella abortus S19 and RB51 vaccine strains by multiple locus variable number tandem repeat analysis (MLVA16). Vaccine 2013; 31:4856-9. [PMID: 23933375 DOI: 10.1016/j.vaccine.2013.07.063] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2013] [Revised: 07/19/2013] [Accepted: 07/25/2013] [Indexed: 10/26/2022]
Abstract
The aims of the present study were (i) to assess the in vitro genetic stability of S19 and RB51 Brucella abortus vaccines strains and (ii) to evaluate the ability of multiple-locus variable-number tandem repeat (VNTR) analysis (MLVA) as a tool to be used in the quality control of live vaccines against brucellosis. Sixty-three batches of commercial S19 (n=53) and RB51 (n=10) vaccines, produced between 2006 and 2009, were used in this study. S19 and RB51 vaccines were obtained from, respectively, seven and two different manufacturers. Ten in vitro serial passages were performed on reference strains and on selected batches of commercial vaccines. All batches, reference strains and strains of serial passages were typed by the MLVA16. The results demonstrated that B. abortus S19 and RB51 vaccine strains are genetically stable and very homogeneous in their respective groups. Anyway, batches of S19 from one manufacturer and batches of RB51 from another presented genotypes distincts from the reference vaccine strains. In both cases, differences were found on locus Bruce07, which had addition of one repeat unit in the case of S19 batches and the deletion of one repeat unit in the case of RB51 batches. In summary, MLVA16 proved to be a molecular tool capable of discriminating small genomic variations and should be included in in vitro official tests.
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Affiliation(s)
- Elaine Maria Seles Dorneles
- Laboratório de Bacteriologia Aplicada, Departamento de Medicina Veterinária Preventiva, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
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18
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Miranda KL, Poester FP, Minharro S, Dorneles EMS, Stynen APR, Lage AP. Evaluation of Brucella abortus S19 vaccines commercialized in Brazil: immunogenicity, residual virulence and MLVA15 genotyping. Vaccine 2013; 31:3014-8. [PMID: 23664986 DOI: 10.1016/j.vaccine.2013.04.054] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2012] [Revised: 03/20/2013] [Accepted: 04/24/2013] [Indexed: 11/16/2022]
Abstract
Live attenuated Brucella abortus S19 is the most effective vaccine against brucellosis in cattle. The assessment of the immunological parameters is essential to guarantee the biological quality of live anti-bacteria vaccines. The evaluation of genetic stability of live bacterial vaccines is also important in quality control. The aims of the present study were to compare (i) the immunogenicity and residual virulence, and (ii) the genotypic profile (MLVA15) of the eight S19 vaccines commercialized in Brazil to the USDA S19 reference strain. Two batches of each of the eight S19 commercial vaccines used in Brazil (A-H) were tested. They were submitted to the potency and residual virulence in vivo tests recommended by OIE and typed by the multiple-locus variable-number tandem repeat (VNTR) analysis (MLVA) described for Brucella spp. Our results demonstrated that all S19 vaccines commercialized in Brazil would be approved by Brazilian and OIE recommendations for potency and residual virulence. Furthermore, the S19 vaccine is genetically very homogeneous, as all but two batches (from the same manufacturer) tested showed identical MLVA15 profile. The two batches with different profiles presented six repeat units in locus Bruce07, instead of the five found in all other strains, including the USDA S19 reference strain. Although presenting a slightly different profile, this vaccine was also protective, as demonstrated by the immunogenicity and residual virulence assays performed. Therefore, the commercial Brazilian S19 vaccines were in accordance to Brazilian and international standards for immunogenicity and residual virulence tests. Moreover, our results also show that MLVA could be a useful inclusion to the list of in vitro tests required by the official control authorities to be applied to the commercial S19 vaccines, as an efficient assay to guarantee the quality and stability of the vaccine strains.
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Affiliation(s)
- Karina Leite Miranda
- Laboratório de Bacteriologia Aplicada, Departamento de Medicina Veterinária Preventiva, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
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19
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Ferreira AC, Chambel L, Tenreiro T, Cardoso R, Flor L, Dias IT, Pacheco T, Garin-Bastuji B, Le Flèche P, Vergnaud G, Tenreiro R, de Sá MIC. MLVA16 typing of Portuguese human and animal Brucella melitensis and Brucella abortus isolates. PLoS One 2012; 7:e42514. [PMID: 22905141 PMCID: PMC3419166 DOI: 10.1371/journal.pone.0042514] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2012] [Accepted: 07/06/2012] [Indexed: 12/30/2022] Open
Abstract
To investigate the epidemiological relationship of isolates from different Portuguese geographical regions and to assess the diversity among isolates, the MLVA16Orsay assay (panels 1, 2A and 2B) was performed with a collection of 126 Brucella melitensis (46 human and 80 animal isolates) and 157 B. abortus field isolates, seven vaccine strains and the representative reference strains of each species. The MLVA16Orsay showed a similar high discriminatory power (HGDI 0.972 and 0.902) for both species but panel 1 and 2A markers displayed higher diversity (HGDI 0.693) in B. abortus compared to B. melitensis isolates (HGDI 0.342). The B. melitensis population belong to the “Americas” (17%) and “East Mediterranean” (83%) groups. No isolate belonged to the “West Mediterranean” group. Eighty-five percent of the human isolates (39 in 46) fit in the “East-Mediterranean” group where a single lineage known as MLVA11 genotype 116 is responsible for the vast majority of Brucella infections in humans. B. abortus isolates formed a consistent group with bv1 and bv3 isolates in different clusters. Four MLVA11 genotypes were observed for the first time in isolates from S. Jorge and Terceira islands from Azores. From the collection of isolates analysed in this study we conclude that MLVA16Orsay provided a clear view of Brucella spp. population, confirming epidemiological linkage in outbreak investigations. In particular, it suggests recent and ongoing colonisation of Portugal with one B. melitensis lineage usually associated with East Mediterranean countries.
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Affiliation(s)
- Ana Cristina Ferreira
- Laboratório Nacional de Investigação Veterinária, Instituto Nacional de Recursos Biológicos, IP, Lisboa, Portugal.
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20
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Cross-border molecular tracing of brucellosis in Europe. Comp Immunol Microbiol Infect Dis 2012; 35:181-5. [PMID: 22277829 DOI: 10.1016/j.cimid.2011.12.012] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2011] [Revised: 12/22/2011] [Accepted: 12/23/2011] [Indexed: 11/23/2022]
Abstract
To assess the general impact of endemic countries on the re-emergence of brucellosis in non-endemic regions of the European Union, the genetic fingerprints of Brucella melitensis strains imported to Germany were compared to ovine strains from Turkey in a molecular epidemiological study. Genotyping of 66 Brucella strains (based on Multiple Locus of Variable number of tandem repeats Analysis) isolated from German travellers and Turkish immigrants living in Germany revealed epidemiological concordance with 20 sheep isolates originating from Eastern Anatolia, Turkey. In summary, cross-border molecular tracing confirmed brucellosis being a zoonosis of concern for European public health.
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21
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Jiang H, Fan M, Chen J, Mi J, Yu R, Zhao H, Piao D, Ke C, Deng X, Tian G, Cui B. MLVA genotyping of Chinese human Brucella melitensis biovar 1, 2 and 3 isolates. BMC Microbiol 2011; 11:256. [PMID: 22108057 PMCID: PMC3233519 DOI: 10.1186/1471-2180-11-256] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2011] [Accepted: 11/22/2011] [Indexed: 11/27/2022] Open
Abstract
Background Since 1950, Brucella melitensis has been the predominant strain associated with human brucellosis in China. In this study we investigated the genotypic characteristics of B. melitensis isolates from China using a multiple-locus variable-number tandem-repeat analysis (MLVA) and evaluated the utility of MLVA with regards to epidemiological trace-back investigation. Results A total of 105 B. melitensis strains isolated from throughout China were divided into 69 MLVA types using MLVA-16. Nei's genetic diversity indices for the various loci ranged between 0.00 - 0.84. 12 out 16 loci were the low diversity with values < 0.2 and the most discriminatory markers were bruce16 and bruce30 with a diversity index of > 0.75 and containing 8 and 7 alleles, respectively. Many isolates were single-locus or double-locus variants of closely related B. melitensis isolates from different regions, including the north and south of China. Using panel 1, the majority of strains (84/105) were genotype 42 clustering to the 'East Mediterranean' B. melitensis group. Chinese B. melitensis are classified in limited number of closely related genotypes showing variation mainly at the panel 2B loci. Conclusion The MLVA-16 assay can be useful to reveal the predominant genotypes and strain relatedness in endemic or non-endemic regions of brucellosis. However it is not suitable for biovar differentiation of B. melitensis. Genotype 42 is widely distributed throughout China during a long time. Bruce 16 and bruce 30 in panel 2B markers are most useful for typing Chinese isolates.
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Affiliation(s)
- Hai Jiang
- State Key Laboratory for Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, 155 Changbai Road, Changping, Beijing 102206, PR China
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22
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Strain Typing Using Multiple “Variable Number of Tandem Repeat” Analysis and Genetic Element CRISPR. Mol Microbiol 2011. [DOI: 10.1128/9781555816834.ch11] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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23
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Visca P, D'Arezzo S, Ramisse F, Gelfand Y, Benson G, Vergnaud G, Fry NK, Pourcel C. Investigation of the population structure of Legionella pneumophila by analysis of tandem repeat copy number and internal sequence variation. MICROBIOLOGY-SGM 2011; 157:2582-2594. [PMID: 21622529 DOI: 10.1099/mic.0.047258-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The population structure of the species Legionella pneumophila was investigated by multilocus variable number of tandem repeats (VNTR) analysis (MLVA) and sequencing of three VNTRs (Lpms01, Lpms04 and Lpms13) in selected strains. Of 150 isolates of diverse origins, 136 (86 %) were distributed into eight large MLVA clonal complexes (VACCs) and the rest were either unique or formed small clusters of up to two MLVA genotypes. In spite of the lower degree of genome-wide linkage disequilibrium of the MLVA loci compared with sequence-based typing, the clustering achieved by the two methods was highly congruent. The detailed analysis of VNTR Lpms04 alleles showed a very complex organization, with five different repeat unit lengths and a high level of internal variation. Within each MLVA-defined VACC, Lpms04 was endowed with a common recognizable pattern with some interesting exceptions. Evidence of recombination events was suggested by analysis of internal repeat variations at the two additional VNTR loci, Lpms01 and Lpms13. Sequence analysis of L. pneumophila VNTR locus Lpms04 alone provides a first-line assay for allocation of a new isolate within the L. pneumophila population structure and for epidemiological studies.
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Affiliation(s)
- Paolo Visca
- Dipartimento di Biologia, Università Roma Tre, Rome, Italy
| | - Silvia D'Arezzo
- Istituto Nazionale per le Malattie Infettive 'Lazzaro Spallanzani' IRCCS, Rome, Italy
| | - Françoise Ramisse
- Division of Analytical Microbiology, DGA CBRN Defence, Vert le Petit, France
| | - Yevgeniy Gelfand
- Department of Computer Science, Department of Biology, Program in Bioinformatics, Boston University, Boston, MA, USA.,Laboratory for Biocomputing and Informatics, Boston University, Boston, MA, USA
| | - Gary Benson
- Laboratory for Biocomputing and Informatics, Boston University, Boston, MA, USA
| | - Gilles Vergnaud
- DGA/MRIS, Mission pour la Recherche et l'Innovation Scientifique, Bagneux, France.,Université Paris-Sud, Institut de Génétique et Microbiologie, Orsay, France
| | - Norman K Fry
- Respiratory and Systemic Infection Laboratory, Health Protection Agency Centre for Infections, London, UK
| | - Christine Pourcel
- Université Paris-Sud, Institut de Génétique et Microbiologie, Orsay, France
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24
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Álvarez J, Sáez JL, García N, Serrat C, Pérez-Sancho M, González S, Ortega MJ, Gou J, Carbajo L, Garrido F, Goyache J, Domínguez L. Management of an outbreak of brucellosis due to B. melitensis in dairy cattle in Spain. Res Vet Sci 2011; 90:208-11. [DOI: 10.1016/j.rvsc.2010.05.028] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2009] [Revised: 03/06/2010] [Accepted: 05/22/2010] [Indexed: 10/19/2022]
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25
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Aftab H, Dargis R, Christensen JJ, Le Flèche P, Kemp M. Imported brucellosis in Denmark: molecular identification and multiple-locus variable number tandem repeat analysis (MLVA) genotyping of the bacteria. ACTA ACUST UNITED AC 2011; 43:536-8. [PMID: 21375425 DOI: 10.3109/00365548.2011.562531] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
A polymerase chain reaction was used to identify Brucella species isolated from humans in Denmark. Consecutive analysis of referred bacteria and re-examination of historical isolates identified all as Brucella melitensis. Multiple-locus variable number tandem repeat analysis (MLVA) placed the isolates in the previously defined 'East Mediterranean' B. melitensis group.
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Affiliation(s)
- Huma Aftab
- Statens Serum Institut, Copenhagen, Denmark
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26
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KANG SI, HEO EJ, CHO D, KIM JW, KIM JY, JUNG SC, HER M. Genetic Comparison of Brucella canis Isolates by the MLVA Assay in South Korea. J Vet Med Sci 2011; 73:779-86. [DOI: 10.1292/jvms.10-0334] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
- Sung-Il KANG
- OIE Reference Laboratory for Brucellosis & Zoonoses Lab., Department of Bacteriology & Parasitology, National Veterinary Research and Quarantine Service (NVRQS)
| | - Eun Jeong HEO
- OIE Reference Laboratory for Brucellosis & Zoonoses Lab., Department of Bacteriology & Parasitology, National Veterinary Research and Quarantine Service (NVRQS)
| | - Donghee CHO
- OIE Reference Laboratory for Brucellosis & Zoonoses Lab., Department of Bacteriology & Parasitology, National Veterinary Research and Quarantine Service (NVRQS)
| | - Jong Wan KIM
- OIE Reference Laboratory for Brucellosis & Zoonoses Lab., Department of Bacteriology & Parasitology, National Veterinary Research and Quarantine Service (NVRQS)
| | - Ji-Yeon KIM
- OIE Reference Laboratory for Brucellosis & Zoonoses Lab., Department of Bacteriology & Parasitology, National Veterinary Research and Quarantine Service (NVRQS)
| | - Suk Chan JUNG
- OIE Reference Laboratory for Brucellosis & Zoonoses Lab., Department of Bacteriology & Parasitology, National Veterinary Research and Quarantine Service (NVRQS)
| | - Moon HER
- OIE Reference Laboratory for Brucellosis & Zoonoses Lab., Department of Bacteriology & Parasitology, National Veterinary Research and Quarantine Service (NVRQS)
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27
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Epidemiological and phylogenetic analysis of Spanish human Brucella melitensis strains by multiple-locus variable-number tandem-repeat typing, hypervariable octameric oligonucleotide fingerprinting, and rpoB typing. J Clin Microbiol 2010; 48:2734-40. [PMID: 20554816 DOI: 10.1128/jcm.00533-10] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The severe morbidity of human brucellosis is one of the main reasons for using molecular typing in the epidemiological surveillance of this worldwide zoonosis. Multiple-locus variable-number repeat analysis (MLVA-16), hypervariable octameric oligonucleotide fingerprinting (HOOF-print), and the differences in the single nucleotide polymorphisms (SNPs) (codons 1249 and 1309) of the DNA-dependent RNA polymerase beta subunit (rpoB) were used to type a human Brucella melitensis population (108 strains) collected from throughout Spain over 13 years. Eighty-six MLVA types (discriminatory index, 0.99) were detected, with a wide-ranging genetic similarity coefficient (37.2 to 93.7%). The population clustered into the following groups: American, with genotypes 47 (1 strain), 48 (13 strains), 53 (12 strains), 55 (2 strains), 80 (1 strain), and a new genotype (2 strains), Western Mediterranean, with genotype 51 (9 strains), and Eastern Mediterranean, with genotypes 42 (60 strains), 43 (4 strains), and 63 (4 strains). Two profession-related and two foodborne acquisitions were confirmed. Distributed throughout Spain, Eastern Mediterranean genotype 42 was the most common (55%). The low MLVA-16 allelic polymorphism (genetic similarity range, 75 to 94%) of the genotype 42 strains suggests that they recently evolved from a common ancestor. rpoB typing grouped the strains as rpoB type 1 (1249-ATG/1309-CTG; 28.7%), rpoB type 2 (1249-ATG/1309-CTA; 62.9%), and rpoB type 3 (1249-ATA/1309-CTG; 8.3%). According to the MLVA-16 results, the population clustered by rpoB type. Given the correlation between B. melitensis MLVA groups and rpoB types (American and rpoB type 1, Eastern Mediterranean and rpoB type 2, and Western Mediterranean and rpoB type 3), the rpoB type could be used as an initial marker for the epidemiological surveillance of brucellosis.
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28
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Whatmore AM. Current understanding of the genetic diversity of Brucella, an expanding genus of zoonotic pathogens. INFECTION GENETICS AND EVOLUTION 2009; 9:1168-84. [DOI: 10.1016/j.meegid.2009.07.001] [Citation(s) in RCA: 143] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2009] [Revised: 07/09/2009] [Accepted: 07/16/2009] [Indexed: 10/20/2022]
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29
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Brucellosis in a dog caused by Brucella melitensis Rev 1. Vet Microbiol 2009; 141:391-2. [PMID: 19828267 DOI: 10.1016/j.vetmic.2009.09.019] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2009] [Revised: 09/21/2009] [Accepted: 09/22/2009] [Indexed: 10/20/2022]
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30
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Genomic research for important pathogenic bacteria in China. ACTA ACUST UNITED AC 2009; 52:50-63. [DOI: 10.1007/s11427-009-0009-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2008] [Accepted: 12/22/2008] [Indexed: 12/21/2022]
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31
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Evaluation of a multilocus variable-number tandem-repeat analysis scheme for typing human Brucella isolates in a region of brucellosis endemicity. J Clin Microbiol 2008; 46:3935-40. [PMID: 18923007 DOI: 10.1128/jcm.00464-08] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Brucellosis remains an important anthropozoonosis worldwide. Brucella species are genetically homogeneous, and thus, the typing of Brucella species for epidemiological purposes by conventional molecular typing methods has remained elusive. Although many methods could segregate isolates into the phylogenetically recognized taxa, limited within-species genetic diversity has been identified. Recently, multilocus variable-number tandem-repeat analysis (MLVA) was found to have a high degree of resolution when it was applied to collections of Brucella isolates from geographically widespread locations, and an assay comprising 16 such loci (MLVA-16) was proposed. This scheme includes eight minisatellite loci (panel 1) and eight microsatellites (panel 2, which is subdivided into panels 2A and 2B). The utility of MLVA-16 for the subtyping of human Brucella isolates from geographically restricted regions needs to be further evaluated, and genotyping databases with worldwide coverage must be progressively established. In the present study, MLVA-16 was applied to the typing of 42 human Brucella isolates obtained from 41 patients recovered from 2002 to 2006 at a tertiary-care center in Lebanon. All isolates were identified as Brucella melitensis by MLVA-16 and were found to be closely related to B. melitensis isolates from neighboring countries in the Middle East when their genotypes were queried against those in the web-based Brucella2007 MLVA database (http://mlva.u-psud.fr/). Panel 2B, which comprised the most variable loci, displayed a very high discriminatory power, while panels 1 and 2A showed limited diversity. The most frequent genotype comprised seven isolates obtained over 7 weeks in 2002, demonstrating an outbreak from a common source. Two isolates obtained from one patient 5 months apart comprised another genotype, indicating relapsing disease. These findings confirm that MLVA-16 has a good discriminatory power for species determination, typing of B. melitensis isolates, and inferring their geographical origin. Abbreviated panel 2B could be used as a short-term epidemiological tool in a small region of endemicity.
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32
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Comparison of multiple-locus variable-number tandem-repeat analysis with other PCR-based methods for typing Brucella suis isolates. J Clin Microbiol 2007; 45:4070-2. [PMID: 17942649 DOI: 10.1128/jcm.01096-07] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Multiple-locus variable-number tandem-repeat analysis (MLVA), multiplex PCR, and PCR-restriction fragment length polymorphism analysis were compared for typing Brucella suis isolates. A perfect concordance was obtained among these molecular assays. However, MLVA was the only method to demonstrate brucellosis outbreaks and to confirm that wildlife is a reservoir for zoonotic brucellosis.
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33
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Al Dahouk S, Flèche PL, Nöckler K, Jacques I, Grayon M, Scholz HC, Tomaso H, Vergnaud G, Neubauer H. Evaluation of Brucella MLVA typing for human brucellosis. J Microbiol Methods 2007; 69:137-45. [PMID: 17261338 DOI: 10.1016/j.mimet.2006.12.015] [Citation(s) in RCA: 202] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2006] [Revised: 12/12/2006] [Accepted: 12/21/2006] [Indexed: 11/30/2022]
Abstract
Human brucellosis is still the most common bacterial zoonosis worldwide. Neither well-known molecular tools nor the classical biotyping methods are satisfactory for subtyping of Brucella spp. Loci containing Variable Number of Tandem Repeats (VNTRs) have recently proved their usefulness in typing strains from animal origin despite the high genetic homogeneity within the genus Brucella (DNA-DNA homology >90%). The aim of this study was to evaluate MLVA (Multiple Locus VNTR Analysis) for diagnostic and epidemiological use in human brucellosis. One hundred and twenty-eight B. melitensis isolates of all three biovars were typed using eight minisatellite (panel 1) and eight microsatellite (panel 2) markers. One hundred and ten different genotypes were identified. The MLVA clustering pattern correlated with the geographic origin of the strains. Brucella strains isolated from different patients within the same outbreak or from the same patient before first-line therapy and after relapse showed identical genotypes. Fuchsin sensitive B. melitensis strains were found in closely related clusters giving evidence for an association between VNTRs and some phenotypic characteristics. However, the validity of biovars established by classical microbiological methods could not be confirmed by MLVA clustering. The original data can be queried on the genotyping web page at http://bacterial-genotyping.igmors.u-psud.fr. The MLVA assay is rapid, highly discriminatory, and reproducible within human Brucella isolates. MLVA can significantly contribute to epidemiological trace-back analysis of Brucella infections and may advance surveillance and control of human brucellosis.
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Affiliation(s)
- Sascha Al Dahouk
- Bundeswehr Institute of Microbiology, Department of Bacteriology, Neuherbergstr. 11, D-80937 Munich, Germany.
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