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McKnight DJE, Wong-Bajracharya J, Okoh EB, Snijders F, Lidbetter F, Webster J, Haughton M, Darling AE, Djordjevic SP, Bogema DR, Chapman TA. Xanthomonas rydalmerensis sp. nov., a non-pathogenic member of Group 1 Xanthomonas. Int J Syst Evol Microbiol 2024; 74:006294. [PMID: 38536071 PMCID: PMC10995728 DOI: 10.1099/ijsem.0.006294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Accepted: 03/04/2024] [Indexed: 04/07/2024] Open
Abstract
Five bacterial isolates were isolated from Fragaria × ananassa in 1976 in Rydalmere, Australia, during routine biosecurity surveillance. Initially, the results of biochemical characterisation indicated that these isolates represented members of the genus Xanthomonas. To determine their species, further analysis was conducted using both phenotypic and genotypic approaches. Phenotypic analysis involved using MALDI-TOF MS and BIOLOG GEN III microplates, which confirmed that the isolates represented members of the genus Xanthomonas but did not allow them to be classified with respect to species. Genome relatedness indices and the results of extensive phylogenetic analysis confirmed that the isolates were members of the genus Xanthomonas and represented a novel species. On the basis the minimal presence of virulence-associated factors typically found in genomes of members of the genus Xanthomonas, we suggest that these isolates are non-pathogenic. This conclusion was supported by the results of a pathogenicity assay. On the basis of these findings, we propose the name Xanthomonas rydalmerensis, with DAR 34855T = ICMP 24941 as the type strain.
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Affiliation(s)
- Daniel J. E. McKnight
- NSW Department of Primary Industries, Elizabeth Macarthur Agricultural Institute, Woodbridge Rd, Menangle NSW 2568, Australia
- University of Technology Sydney, 15 Broadway, Ultimo NSW 2007, Australia
| | - Johanna Wong-Bajracharya
- NSW Department of Primary Industries, Elizabeth Macarthur Agricultural Institute, Woodbridge Rd, Menangle NSW 2568, Australia
| | - Efenaide B. Okoh
- NSW Department of Primary Industries, Elizabeth Macarthur Agricultural Institute, Woodbridge Rd, Menangle NSW 2568, Australia
- Western Sydney University, Penrith, NSW, Australia
| | - Fridtjof Snijders
- NSW Department of Primary Industries, Elizabeth Macarthur Agricultural Institute, Woodbridge Rd, Menangle NSW 2568, Australia
| | - Fiona Lidbetter
- NSW Department of Primary Industries, Elizabeth Macarthur Agricultural Institute, Woodbridge Rd, Menangle NSW 2568, Australia
| | - John Webster
- NSW Department of Primary Industries, Elizabeth Macarthur Agricultural Institute, Woodbridge Rd, Menangle NSW 2568, Australia
| | - Mathew Haughton
- NSW Department of Primary Industries, Elizabeth Macarthur Agricultural Institute, Woodbridge Rd, Menangle NSW 2568, Australia
| | - Aaron E. Darling
- University of Technology Sydney, 15 Broadway, Ultimo NSW 2007, Australia
| | | | - Daniel R. Bogema
- NSW Department of Primary Industries, Elizabeth Macarthur Agricultural Institute, Woodbridge Rd, Menangle NSW 2568, Australia
- University of Technology Sydney, 15 Broadway, Ultimo NSW 2007, Australia
| | - Toni A. Chapman
- NSW Department of Primary Industries, Elizabeth Macarthur Agricultural Institute, Woodbridge Rd, Menangle NSW 2568, Australia
- University of Technology Sydney, 15 Broadway, Ultimo NSW 2007, Australia
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Diakou A. Biting Back: Advances in Fighting Ticks and Understanding Tick-Borne Pathogens. Pathogens 2024; 13:73. [PMID: 38251380 PMCID: PMC10819772 DOI: 10.3390/pathogens13010073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Accepted: 01/11/2024] [Indexed: 01/23/2024] Open
Abstract
Ticks are blood-feeding arthropods and obligate ectoparasites of virtually all animal species (except fish) and humans [...].
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Affiliation(s)
- Anastasia Diakou
- Laboratory of Parasitology and Parasitic Diseases, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
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Lakew BT, Eastwood S, Walkden-Brown SW. Epidemiology and Transmission of Theileria orientalis in Australasia. Pathogens 2023; 12:1187. [PMID: 37887703 PMCID: PMC10610506 DOI: 10.3390/pathogens12101187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 09/19/2023] [Accepted: 09/19/2023] [Indexed: 10/28/2023] Open
Abstract
Oriental theileriosis, a disease primarily impacting cattle is caused by an apicomplexan hemoprotozoan parasite, Theileria orientalis. It has now become established in the Australasia region. The organism was long considered a benign cause of persistent infections; however, an increase in clinical outbreaks since 2006 in the eastern Australian states and New Zealand was associated with the identification of the pathogenic Ikeda (Type 2) and Chitose (Type 1) genotypes. Unlike the pathogenic T. parva and T. annulate, which target leucocytes, clinical manifestation with T. orientalis is due to its effects on erythrocytes, with the infection sometimes designated as Theileria associated bovine anemia (TABA). In Australia and New Zealand, the tick Haemaphysalis longicornis is the principal vector, though other Haemaphysalis species are also likely vectors. The endemic status of infection with pathogenic genotypes in areas with low or absent tick populations is an apparent paradox that may be attributable to alternative modes of transmission, such as mechanical transmission by hematophagous insects (lice, mosquitoes, and biting flies), vertical transmission, and transmission via iatrogenic means. This review addresses the evidence for the different modes of transmission of T. orientalis with particular focus on the reported and potential vectors in Australasia.
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Affiliation(s)
- Biniam T. Lakew
- Animal Science, School of Environmental and Rural Science, University of New England, Armidale, NSW 2351, Australia;
- College of Veterinary Medicine, Haramaya University, Dire Dawa P.O. Box 138, Ethiopia
| | - Steve Eastwood
- NSW Department of Primary Industries, Armidale, NSW 2350, Australia;
| | - Stephen W. Walkden-Brown
- Animal Science, School of Environmental and Rural Science, University of New England, Armidale, NSW 2351, Australia;
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Kuibagarov M, Makhamed R, Zhylkibayev A, Berdikulov M, Abdrakhmanov S, Kozhabayev M, Akhmetollayev I, Mukanov K, Ryskeldina A, Ramankulov Y, Shustov A, Bauer C, Shevtsov A. Theileria and Babesia infection in cattle - First molecular survey in Kazakhstan. Ticks Tick Borne Dis 2023; 14:102078. [PMID: 36395616 DOI: 10.1016/j.ttbdis.2022.102078] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Revised: 10/17/2022] [Accepted: 11/04/2022] [Indexed: 11/07/2022]
Abstract
Central Asia, including Kazakhstan, is an endemic area of Theileria and Babesia infections in cattle. Current data on the geographic distribution, prevalence, and genetic diversity of these pathogens in vertebrate hosts are lacking in Kazakhstan. The present study aimed to fill this gap, using molecular techniques for the first time. A cross-sectional survey was performed on adult cattle from 40 villages in nine administrative districts of the provinces of Turkistan and Zhambyl, southern Kazakhstan, in summer 2020. A total of 766 blood samples were screened for Theileria annulata (enolase gene), Theileria orientalis (major piroplasm surface protein gene, MPSP) and Babesia spp. (18 S ribosomal RNA gene) using polymerase chain reaction. The genetic variability of Theileria spp. was assessed by sequencing one amplicon from each village. All Babesia spp. positive amplicons were sequenced to identify the species involved. The overall prevalence of infections with T. annulata, T. orientalis and Babesia spp. was 83.0% (40 villages positive), 33.3% (31 villages) and 13.5% (36 villages), respectively. Co-infections with two or three species were present in 48.9% of all positive cattle. Theileria annulata showing a high polymorphism of the enolase gene occurred with similar frequency in both provinces. Theileria orientalis was detected for the first time in Kazakhstan being significantly (P = 0.014) more prevalent in Zhambyl than in Turkistan. Fourteen genotypes of T. orientalis were identified; two belonged to the moderately virulent MPSP-type 1 ('Chitose') and the others to MPSP-type 3 ('Buffeli') which is considered avirulent. The prevalence of Babesia infection was significantly (P < 0.000) higher in Turkistan than in Zhambyl. An unequivocal identification of the species involved was possible in 127 sequenced samples: Babesia occultans was the most common species, followed by Babesia bigemina and Babesia major, the latter being the first record in the country. The results show that Theileria and Babesia infections in cattle are widespread and occur with remarkably high prevalence in the southern Kazakhstan. They also provide first data on the genetic diversity of the species involved.
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Affiliation(s)
- Marat Kuibagarov
- National Center for Biotechnology, Korgalzhyn Road 13/5, 010000 Nur-Sultan, Kazakhstan.
| | - Riza Makhamed
- National Center for Biotechnology, Korgalzhyn Road 13/5, 010000 Nur-Sultan, Kazakhstan
| | - Assylbek Zhylkibayev
- National Center for Biotechnology, Korgalzhyn Road 13/5, 010000 Nur-Sultan, Kazakhstan
| | - Maxat Berdikulov
- National Veterinary Reference Center, 150 let Abaya Street 22/3, 010000 Astana, Kazakhstan
| | - Sarsenbay Abdrakhmanov
- S. Seifullin Kazakh Agrotechnical University, Faculty of Veterinary Medicine, Zhenis Avenue 62, 010011 Astana, Kazakhstan
| | - Mazhit Kozhabayev
- National Veterinary Reference Center, 150 let Abaya Street 22/3, 010000 Astana, Kazakhstan
| | - Ilyas Akhmetollayev
- National Center for Biotechnology, Korgalzhyn Road 13/5, 010000 Nur-Sultan, Kazakhstan
| | - Kasim Mukanov
- National Center for Biotechnology, Korgalzhyn Road 13/5, 010000 Nur-Sultan, Kazakhstan
| | - Anara Ryskeldina
- National Center for Biotechnology, Korgalzhyn Road 13/5, 010000 Nur-Sultan, Kazakhstan
| | - Yerlan Ramankulov
- National Center for Biotechnology, Korgalzhyn Road 13/5, 010000 Nur-Sultan, Kazakhstan
| | - Alexandr Shustov
- National Center for Biotechnology, Korgalzhyn Road 13/5, 010000 Nur-Sultan, Kazakhstan
| | - Christian Bauer
- S. Seifullin Kazakh Agrotechnical University, Faculty of Veterinary Medicine, Zhenis Avenue 62, 010011 Astana, Kazakhstan; Institute of Parasitology, Justus Liebig University Giessen, Schubertstrasse 81, 35392 Giessen, Germany.
| | - Alexandr Shevtsov
- National Center for Biotechnology, Korgalzhyn Road 13/5, 010000 Nur-Sultan, Kazakhstan.
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Telionis A, Lahmers K, Todd M, Carbonello A, Broaddus CC, Bissett CJ, Hungerford LL. Distribution of Theileria orientalis in Virginia Market Cattle, 2018-2020. Pathogens 2022; 11:1353. [PMID: 36422604 PMCID: PMC9695988 DOI: 10.3390/pathogens11111353] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Revised: 10/12/2022] [Accepted: 11/01/2022] [Indexed: 11/25/2023] Open
Abstract
Theileria orientalis, genotype Ikeda, was recently detected in North America. Determining the emerging distribution of this pathogen is critical for understanding spread and developing management strategies. Whole blood samples were collected from cattle at Virginia livestock markets from September 2018 through December 2020. Animals were tested for T. orientalis using a universal and then genotype specific real-time PCR based on the MPSP gene. Prevalence for each genotype was analyzed for temporal trends and mapped by county. Spatial patterns were compared between genotypes and assessed for associations with habitat features, cattle movements through cattle markets and county proximity. Overall, 212 of 1980 samples tested positive for T. orientalis with an overall prevalence of 8.7% (172/1980) for genotype Ikeda, 1.8% (36/1980) for genotype Chitose, 0.2% (3/1980) for genotype Buffeli. The Ikeda genotype increased over time in northern and southwestern Virginia markets. The Ikeda and Chitose genotypes occurred in different regions, with little overlap, but for each genotype, spatial distribution was associated with a combination of cattle movements and environmental factors. Genotype specific qPCR testing and surveillance of cattle from across a wide area of Virginia are providing information on temporal, spatial, and other patterns for this emerging disease.
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Affiliation(s)
- Alex Telionis
- Department of Population Health Sciences, Virginia Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA 24060, USA
| | - Kevin Lahmers
- Department of Biomedical Sciences and Pathobiology, Virginia Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA 24060, USA
- Virginia Tech Animal Laboratory Services (ViTALS), Virginia Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA 24060, USA
| | - Michelle Todd
- Department of Biomedical Sciences and Pathobiology, Virginia Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA 24060, USA
- Virginia Tech Animal Laboratory Services (ViTALS), Virginia Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA 24060, USA
| | - Amanda Carbonello
- Department of Biomedical Sciences and Pathobiology, Virginia Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA 24060, USA
- Virginia Tech Animal Laboratory Services (ViTALS), Virginia Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA 24060, USA
| | - Charles C. Broaddus
- Virginia Department of Agriculture and Consumer Services, Richmond, VA 23219, USA
| | - Carolynn J. Bissett
- Virginia Department of Agriculture and Consumer Services, Richmond, VA 23219, USA
| | - Laura L. Hungerford
- Department of Population Health Sciences, Virginia Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA 24060, USA
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Jenkins C, Micallef ML, Padula MP, Bogema DR. Characterisation of the Theileria orientalis Piroplasm Proteome across Three Common Genotypes. Pathogens 2022; 11:pathogens11101135. [PMID: 36297192 PMCID: PMC9610513 DOI: 10.3390/pathogens11101135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Revised: 09/27/2022] [Accepted: 09/27/2022] [Indexed: 11/06/2022] Open
Abstract
Theileria orientalis is an emerging apicomplexan pathogen of cattle occurring in areas populated by the principal vector tick, Haemaphysalis longicornis. Unlike transforming Theileria spp. that induce cancer-like proliferation of lymphocytes via their schizont stage, T. orientalis destroys host erythrocytes during its piroplasm phase resulting in anaemia. The underlying pathogenic processes of T. orientalis infection are poorly understood; consequently, there are no vaccines for prevention of T. orientalis infection and chemotherapeutic options are limited. To identify antigens expressed during the piroplasm phase of T. orientalis, including those which may be useful targets for future therapeutic development, we examined the proteome across three common genotypes of the parasite (Ikeda, Chitose and Buffeli) using preparations of piroplasms purified from bovine blood. A combination of Triton X-114 extraction, one-dimensional electrophoresis and LC-MS/MS identified a total of 1113 proteins across all genotypes, with less than 3% of these representing host-derived proteins. Just over three quarters of T. orientalis proteins (78%) identified were from the aqueous phase of the TX-114 extraction representing cytosolic proteins, with the remaining 22% from the detergent phase, representing membrane-associated proteins. All enzymes involved in glycolysis were expressed, suggesting that this is the major metabolic pathway used during the T. orientalis piroplasm phase. Proteins involved in binding and breakdown of haemoglobin were also identified, suggesting that T. orientalis uses haemoglobin as a source of amino acids. A number of proteins involved in host cell interaction were also identified which may be suitable targets for the development of chemotherapeutics or vaccines.
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Affiliation(s)
- Cheryl Jenkins
- NSW Department of Primary Industries, Elizabeth Macarthur Agricultural Institute, Menangle, NSW 2568, Australia
- Correspondence: ; Tel.: +61-2-4640-6396
| | - Melinda L. Micallef
- NSW Department of Primary Industries, Elizabeth Macarthur Agricultural Institute, Menangle, NSW 2568, Australia
| | - Matthew P. Padula
- School of Life Sciences, Faculty of Sciences, University of Technology, Sydney, NSW 2007, Australia
| | - Daniel R. Bogema
- NSW Department of Primary Industries, Elizabeth Macarthur Agricultural Institute, Menangle, NSW 2568, Australia
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Yam J, Bogema DR, Micallef ML, Djordjevic SP, Jenkins C. Complete Genomes of Theileria orientalis Chitose and Buffeli Genotypes Reveal within Species Translocations and Differences in ABC Transporter Content. Pathogens 2022; 11:pathogens11070801. [PMID: 35890045 PMCID: PMC9323827 DOI: 10.3390/pathogens11070801] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Revised: 07/08/2022] [Accepted: 07/13/2022] [Indexed: 11/16/2022] Open
Abstract
Theileria orientalis causes losses to cattle producers in Eastern Asia, Oceania and, more recently, North America. One pathogenic genotype (Ikeda) has been sequenced to the chromosomal level, while only draft genomes exist for globally distributed Chitose and Buffeli genotypes. To provide an accurate comparative gene-level analysis and help further understand their pathogenicity, we sequenced isolates of the Chitose and Buffeli genotypes of T. orientalis using long-read sequencing technology. A combination of several long-read assembly methods and short reads produced chromosomal-level assemblies for both Fish Creek (Chitose) and Goon Nure (Buffeli) isolates, including the first complete and circular apicoplast genomes generated for T. orientalis. Comparison with the Shintoku (Ikeda) reference sequence showed both large and small translocations in T. orientalis Buffeli, between chromosomes 2 and 3 and chromosomes 1 and 4, respectively. Ortholog clustering showed expansion of ABC transporter genes in Chitose and Buffeli. However, differences in several genes of unknown function, including DUF529/FAINT-domain-containing proteins, were also identified and these genes were more prevalent in Ikeda and Chitose genotypes. Phylogenetics and similarity measures were consistent with previous short-read genomic analysis. The generation of chromosomal sequences for these highly prevalent T. orientalis genotypes will also support future studies of population genetics and mixed genotype infections.
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Affiliation(s)
- Jerald Yam
- NSW Department of Primary Industries, Elizabeth Macarthur Agricultural Institute, Menangle, NSW 2568, Australia; (J.Y.); (D.R.B.); (M.L.M.)
- Australian Institute for Microbiology & Infection, University of Technology Sydney, Ultimo, NSW 2007, Australia;
| | - Daniel R. Bogema
- NSW Department of Primary Industries, Elizabeth Macarthur Agricultural Institute, Menangle, NSW 2568, Australia; (J.Y.); (D.R.B.); (M.L.M.)
| | - Melinda L. Micallef
- NSW Department of Primary Industries, Elizabeth Macarthur Agricultural Institute, Menangle, NSW 2568, Australia; (J.Y.); (D.R.B.); (M.L.M.)
| | - Steven P. Djordjevic
- Australian Institute for Microbiology & Infection, University of Technology Sydney, Ultimo, NSW 2007, Australia;
| | - Cheryl Jenkins
- NSW Department of Primary Industries, Elizabeth Macarthur Agricultural Institute, Menangle, NSW 2568, Australia; (J.Y.); (D.R.B.); (M.L.M.)
- Correspondence:
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The Piroplasmida Babesia, Cytauxzoon, and Theileria in farm and companion animals: species compilation, molecular phylogeny, and evolutionary insights. Parasitol Res 2022; 121:1207-1245. [DOI: 10.1007/s00436-022-07424-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Accepted: 01/02/2022] [Indexed: 12/13/2022]
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9
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The basis of molecular diagnostics for piroplasmids: Do the sequences lie? Ticks Tick Borne Dis 2022; 13:101907. [DOI: 10.1016/j.ttbdis.2022.101907] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Revised: 01/13/2022] [Accepted: 01/17/2022] [Indexed: 12/15/2022]
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10
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Emery DL. Approaches to Integrated Parasite Management (IPM) for Theileria orientalis with an Emphasis on Immunity. Pathogens 2021; 10:pathogens10091153. [PMID: 34578185 PMCID: PMC8467331 DOI: 10.3390/pathogens10091153] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Revised: 09/03/2021] [Accepted: 09/05/2021] [Indexed: 11/16/2022] Open
Abstract
Integrated parasite management (IPM) for pests, pathogens and parasites involves reducing or breaking transmission to reduce the impact of infection or infestation. For Theileria orientalis, the critical impact of infection is the first wave of parasitaemia from the virulent genotypes, Ikeda and Chitose, associated with the sequelae from the development of anaemia. Therefore, current control measures for T. orientalis advocate excluding the movement of naïve stock from non-endemic regions into infected areas and controlling the tick Haemaphysalislongicornis, the final host. In Australia, treatment of established infection is limited to supportive therapy. To update and expand these options, this review examines progress towards prevention and therapy for T. orientalis, which are key elements for inclusion in IPM measures to control this parasite.
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Affiliation(s)
- David Lyall Emery
- Sydney school of Veterinary Science, University of Sydney, Sydney, NSW 2006, Australia
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11
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Wang J, Chen K, Ren Q, Zhang Y, Liu J, Wang G, Liu A, Li Y, Liu G, Luo J, Miao W, Xiong J, Yin H, Guan G. Systematic Comparison of the Performances of De Novo Genome Assemblers for Oxford Nanopore Technology Reads From Piroplasm. Front Cell Infect Microbiol 2021; 11:696669. [PMID: 34485177 PMCID: PMC8415751 DOI: 10.3389/fcimb.2021.696669] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2021] [Accepted: 06/29/2021] [Indexed: 01/06/2023] Open
Abstract
Background Emerging long reads sequencing technology has greatly changed the landscape of whole-genome sequencing, enabling scientists to contribute to decoding the genetic information of non-model species. The sequences generated by PacBio or Oxford Nanopore Technology (ONT) be assembled de novo before further analyses. Some genome de novo assemblers have been developed to assemble long reads generated by ONT. The performance of these assemblers has not been completely investigated. However, genome assembly is still a challenging task. Methods and Results We systematically evaluated the performance of nine de novo assemblers for ONT on different coverage depth datasets. Several metrics were measured to determine the performance of these tools, including N50 length, sequence coverage, runtime, easy operation, accuracy of genome and genomic completeness in varying depths of coverage. Based on the results of our assessments, the performances of these tools are summarized as follows: 1) Coverage depth has a significant effect on genome quality; 2) The level of contiguity of the assembled genome varies dramatically among different de novo tools; 3) The correctness of an assembled genome is closely related to the completeness of the genome. More than 30× nanopore data can be assembled into a relatively complete genome, the quality of which is highly dependent on the polishing using next generation sequencing data. Conclusion Considering the results of our investigation, the advantage and disadvantage of each tool are summarized and guidelines of selecting assembly tools are provided under specific conditions.
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Affiliation(s)
- Jinming Wang
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Science, Lanzhou, China
| | - Kai Chen
- Key Laboratory of Aquatic Biodiversity and Conservation, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
| | - Qiaoyun Ren
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Science, Lanzhou, China
| | - Ying Zhang
- Key Laboratory of Functional Genomics and Molecular Diagnosis, Lanzhou Baiyuan Gene Technology Co., Ltd, Lanzhou, China
| | - Junlong Liu
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Science, Lanzhou, China
| | - Guangying Wang
- Key Laboratory of Aquatic Biodiversity and Conservation, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
| | - Aihong Liu
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Science, Lanzhou, China
| | - Youquan Li
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Science, Lanzhou, China
| | - Guangyuan Liu
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Science, Lanzhou, China
| | - Jianxun Luo
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Science, Lanzhou, China
| | - Wei Miao
- Key Laboratory of Aquatic Biodiversity and Conservation, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
| | - Jie Xiong
- Key Laboratory of Aquatic Biodiversity and Conservation, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
| | - Hong Yin
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Science, Lanzhou, China.,Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonoses, Yangzhou University, Yangzhou, China
| | - Guiquan Guan
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Science, Lanzhou, China
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12
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Maboko BB, Featherston J, Sibeko-Matjila KP, Mans BJ. Whole genome sequencing of Theileria parva using target capture. Genomics 2020; 113:429-438. [PMID: 33370583 DOI: 10.1016/j.ygeno.2020.12.033] [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: 05/18/2020] [Revised: 12/02/2020] [Accepted: 12/22/2020] [Indexed: 10/22/2022]
Abstract
Protozoan parasite isolation and purification are laborious and time-consuming processes required for high quality genomic DNA used in whole genome sequencing. The objective of this study was to capture whole Theileria parva genomes directly from cell cultures and blood samples using RNA baits. Cell culture material was bait captured or sequenced directly, while blood samples were all captured. Baits had variable success in capturing T. parva genomes from blood samples but were successful in cell cultures. Genome mapping uncovered extensive host contamination in blood samples compared to cell cultures. Captured cell cultures had over 81 fold coverage for the reference genome compared to 0-33 fold for blood samples. Results indicate that baits are specific to T. parva, are a good alternative to conventional methods and thus ideal for genomic studies. This study also reports the first whole genome sequencing of South African T. parva.
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Affiliation(s)
- Boitumelo B Maboko
- Agricultural Research Council, Onderstepoort Veterinary Research, Private Bag X05, Onderstepoort, 0110 Pretoria, South Africa; Department of Veterinary Tropical Diseases, Vector and Vector-borne Disease Research Programme, University of Pretoria, Private Bag X04, Onderstepoort, 0110 Pretoria, South Africa
| | - Jonathan Featherston
- Agricultural Research Council, Biotechnology Platform, Private Bag X05, Onderstepoort, 0110 Pretoria, South Africa
| | - Kgomotso P Sibeko-Matjila
- Department of Veterinary Tropical Diseases, Vector and Vector-borne Disease Research Programme, University of Pretoria, Private Bag X04, Onderstepoort, 0110 Pretoria, South Africa
| | - Ben J Mans
- Agricultural Research Council, Onderstepoort Veterinary Research, Private Bag X05, Onderstepoort, 0110 Pretoria, South Africa; Department of Veterinary Tropical Diseases, Vector and Vector-borne Disease Research Programme, University of Pretoria, Private Bag X04, Onderstepoort, 0110 Pretoria, South Africa; School of Life Sciences, University of KwaZulu-Natal, Private Bag X54001, Durban 4000, South Africa; Department of Life and Consumer Sciences, University of South Africa, Florida 1709, South Africa.
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13
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Webster J, Bogema D, Chapman TA. Comparative Genomics of Xanthomonas citri pv. citri A* Pathotype Reveals Three Distinct Clades with Varying Plasmid Distribution. Microorganisms 2020; 8:microorganisms8121947. [PMID: 33302542 PMCID: PMC7764509 DOI: 10.3390/microorganisms8121947] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 12/04/2020] [Accepted: 12/07/2020] [Indexed: 11/23/2022] Open
Abstract
Citrus bacterial canker (CBC) is an important disease of citrus cultivars worldwide that causes blister-like lesions on host plants and leads to more severe symptoms such as plant defoliation and premature fruit drop. The causative agent, Xanthomonas citri pv. citri, exists as three pathotypes—A, A*, and Aw—which differ in their host range and elicited host response. To date, comparative analyses have been hampered by the lack of closed genomes for the A* pathotype. In this study, we sequenced and assembled six CBC isolates of pathotype A* using second- and third-generation sequencing technologies to produce complete, closed assemblies. Analysis of these genomes and reference A, A*, and Aw sequences revealed genetic groups within the A* pathotype. Investigation of accessory genomes revealed virulence factors, including type IV secretion systems and heavy metal resistance genes, differentiating the genetic groups. Genomic comparisons of closed genome assemblies also provided plasmid distribution information for the three genetic groups of A*. The genomes presented here complement existing closed genomes of A and Aw pathotypes that are publicly available and open opportunities to investigate the evolution of X. citri pv. citri and the virulence factors that contribute to this serious pathogen.
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Boularias G, Azzag N, Gandoin C, Bouillin C, Chomel B, Haddad N, Boulouis HJ. Bovines Harbor a Diverse Array of Vector-Borne Pathogens in Northeast Algeria. Pathogens 2020; 9:pathogens9110883. [PMID: 33113771 PMCID: PMC7692033 DOI: 10.3390/pathogens9110883] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2020] [Revised: 10/22/2020] [Accepted: 10/23/2020] [Indexed: 11/16/2022] Open
Abstract
Arthropod-borne hemoparasites represent a serious health problem in livestock, causing significant production losses. Currently, the evidence of Anaplasma spp., Theileria spp., Babesia spp., and hemotropic Mycoplasma spp. in Algeria remains limited to a few scattered geographical regions. In this work, our objectives were to study the prevalence of these vector-borne pathogens and to search other agents not yet described in Algeria as well as the identification of statistical associations with various risk factors in cattle in the northeast of Algeria. Among the 205 cattle blood samples tested by PCR analysis, 42.4% positive results were obtained for at least one pathogen. The overall rates of Anaplasma spp., Theileria/Babesia spp., and Mycoplasma spp. in the cattle sampled were respectively 30.7%, 18.5%, and 2.9%; co-infections with multiple species was also detected. Anaplasma spp. and Theileria/Babesia spp. were detected at a higher rate in cattle under 3 years old, according to univariate analysis. Anaplasma spp. DNA was detected more frequently in our sample in cattle living in semi extensive farming. Our study provides additional data about Anaplasma spp., Theileria/Babesia spp. and reveals for the first time that Mycoplasma wenyonii and ‘Candidatus Mycoplasma hemobos are present in cattle in Northeast Algeria.
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Affiliation(s)
- Ghania Boularias
- Research Laboratory for Local Animal Resources Management (GRAL), National Higher Veterinary School of Algiers, Rue Issad Abbes, El Alia, 16025 Algiers, Algeria;
| | - Naouelle Azzag
- Research Laboratory for Local Animal Resources Management (GRAL), National Higher Veterinary School of Algiers, Rue Issad Abbes, El Alia, 16025 Algiers, Algeria;
- Correspondence: (N.A.); (H.-J.B.)
| | - Christelle Gandoin
- UMR BIPAR, National Veterinary School of Alfort, Anses, INRAE, Paris-Est University, 7 Avenue du Général de Gaulle, 94700 Maisons-Alfort, France; (C.G.); (C.B.); (N.H.)
| | - Corinne Bouillin
- UMR BIPAR, National Veterinary School of Alfort, Anses, INRAE, Paris-Est University, 7 Avenue du Général de Gaulle, 94700 Maisons-Alfort, France; (C.G.); (C.B.); (N.H.)
| | - Bruno Chomel
- Department of Population Health and Reproduction, School of Veterinary Medicine, University of California, Davis, CA 95616, USA;
| | - Nadia Haddad
- UMR BIPAR, National Veterinary School of Alfort, Anses, INRAE, Paris-Est University, 7 Avenue du Général de Gaulle, 94700 Maisons-Alfort, France; (C.G.); (C.B.); (N.H.)
| | - Henri-Jean Boulouis
- UMR BIPAR, National Veterinary School of Alfort, Anses, INRAE, Paris-Est University, 7 Avenue du Général de Gaulle, 94700 Maisons-Alfort, France; (C.G.); (C.B.); (N.H.)
- Correspondence: (N.A.); (H.-J.B.)
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15
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Bogema DR, Yam J, Micallef ML, Gholipourkanani H, Go J, Jenkins C, Dang C. Draft genomes of Perkinsus olseni and Perkinsus chesapeaki reveal polyploidy and regional differences in heterozygosity. Genomics 2020; 113:677-688. [PMID: 33017625 DOI: 10.1016/j.ygeno.2020.09.064] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 09/28/2020] [Accepted: 09/30/2020] [Indexed: 12/13/2022]
Abstract
Perkinsus spp. parasites have significant impact on aquaculture and wild mollusc populations. We sequenced the genomes of five monoclonal isolates of Perkinsus olseni and one Perkinsus chesapeaki from international sources. Sequence analysis revealed similar levels of repetitive sequence within species, a polyploid genome structure, and substantially higher heterozygosity in Oceanian-sourced isolates. We also identified tandem replication of the rRNA transcriptional unit, with high strain variation. Characterized gene content was broadly similar amongst all Perkinsus spp. but P. olseni Oceanian isolates contained an elevated number of genes compared to other P. olseni isolates and cox3 could not be identified in any Perkinsus spp. sequence. Phylogenetics and average nucleotide identity scans were consistent with all P. olseni isolates being within one species. These are the first genome sequences generated for both P. olseni and P. chesapeaki and will allow future advances in diagnostic design and population genomics of these important aquatic parasites.
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Affiliation(s)
- Daniel R Bogema
- Elizabeth Macarthur Agricultural Institute, NSW Department of Primary Industries, Menangle, NSW 2568, Australia.
| | - Jerald Yam
- Elizabeth Macarthur Agricultural Institute, NSW Department of Primary Industries, Menangle, NSW 2568, Australia; The Ithree Institute, University of Technology Sydney, NSW 2007, Australia
| | - Melinda L Micallef
- Elizabeth Macarthur Agricultural Institute, NSW Department of Primary Industries, Menangle, NSW 2568, Australia
| | - Hosna Gholipourkanani
- Department of Primary Industries and Regional Development, Government of Western Australia, Perth, WA, Australia
| | - Jeffrey Go
- Elizabeth Macarthur Agricultural Institute, NSW Department of Primary Industries, Menangle, NSW 2568, Australia
| | - Cheryl Jenkins
- Elizabeth Macarthur Agricultural Institute, NSW Department of Primary Industries, Menangle, NSW 2568, Australia
| | - Cecile Dang
- Department of Primary Industries and Regional Development, Government of Western Australia, Perth, WA, Australia
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16
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Agina OA, Shaari MR, Isa NMM, Ajat M, Zamri-Saad M, Hamzah H. Clinical Pathology, Immunopathology and Advanced Vaccine Technology in Bovine Theileriosis: A Review. Pathogens 2020; 9:E697. [PMID: 32854179 PMCID: PMC7558346 DOI: 10.3390/pathogens9090697] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Revised: 07/15/2020] [Accepted: 07/16/2020] [Indexed: 01/29/2023] Open
Abstract
Theileriosis is a blood piroplasmic disease that adversely affects the livestock industry, especially in tropical and sub-tropical countries. It is caused by haemoprotozoan of the Theileria genus, transmitted by hard ticks and which possesses a complex life cycle. The clinical course of the disease ranges from benign to lethal, but subclinical infections can occur depending on the infecting Theileria species. The main clinical and clinicopathological manifestations of acute disease include fever, lymphadenopathy, anorexia and severe loss of condition, conjunctivitis, and pale mucous membranes that are associated with Theileria-induced immune-mediated haemolytic anaemia and/or non-regenerative anaemia. Additionally, jaundice, increases in hepatic enzymes, and variable leukocyte count changes are seen. Theileria annulata and Theileria parva induce an incomplete transformation of lymphoid and myeloid cell lineages, and these cells possess certain phenotypes of cancer cells. Pathogenic genotypes of Theileria orientalis have been recently associated with severe production losses in Southeast Asia and some parts of Europe. The infection and treatment method (ITM) is currently used in the control and prevention of T. parva infection, and recombinant vaccines are still under evaluation. The use of gene gun immunization against T. parva infection has been recently evaluated. This review, therefore, provides an overview of the clinicopathological and immunopathological profiles of Theileria-infected cattle and focus on DNA vaccines consisting of plasmid DNA with genes of interest, molecular adjuvants, and chitosan as the most promising next-generation vaccine against bovine theileriosis.
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Affiliation(s)
- Onyinyechukwu Ada Agina
- Department of Veterinary Pathology and Microbiology, Faculty of Veterinary Medicine, Universiti Putra Malaysia, Serdang 43400, Malaysia;
- Department of Veterinary Pathology and Microbiology, Faculty of Veterinary Medicine, University of Nigeria Nsukka, Nsukka 410001, Nigeria
| | - Mohd Rosly Shaari
- Animal Science Research Centre, Malaysian Agricultural Research and Development Institute, Headquarters, Serdang 43400, Malaysia;
| | - Nur Mahiza Md Isa
- Department of Veterinary Pathology and Microbiology, Faculty of Veterinary Medicine, Universiti Putra Malaysia, Serdang 43400, Malaysia;
| | - Mokrish Ajat
- Department of Veterinary Pre-clinical sciences, Faculty of Veterinary Medicine, Universiti Putra Malaysia, Serdang 43400, Malaysia;
| | - Mohd Zamri-Saad
- Research Centre for Ruminant Diseases, Faculty of Veterinary Medicine, Universiti Putra Malaysia, Serdang 43400, Malaysia;
| | - Hazilawati Hamzah
- Department of Veterinary Pathology and Microbiology, Faculty of Veterinary Medicine, Universiti Putra Malaysia, Serdang 43400, Malaysia;
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17
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Koehler AV, Jabbar A, Hall RS, Gasser RB. A Targeted "Next-Generation" Sequencing-Informatic Approach to Define Genetic Diversity in Theileria orientalis Populations within Individual Cattle: Proof-of-Principle. Pathogens 2020; 9:pathogens9060448. [PMID: 32517045 PMCID: PMC7350381 DOI: 10.3390/pathogens9060448] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Revised: 05/25/2020] [Accepted: 06/03/2020] [Indexed: 12/13/2022] Open
Abstract
Oriental theileriosis is an economically important tickborne disease of bovines, caused by some members of the Theileria orientalis complex. Currently, 11 distinct operational taxonomic units (OTUs), or genotypes, are recognized based on their major piroplasm surface protein (MPSP) gene sequences. Two of these genotypes (i.e., chitose and ikeda) are recognized as pathogenic in cattle, causing significant disease in countries of the Asia-Pacific region. However, the true extent of genetic variation and associated virulence/pathogenicity within this complex is unknown. Here, we undertook a proof-of-principle study of a small panel of genomic DNAs (n = 13) from blood samples originating from individual cattle known to harbor T. orientalis, in order to assess the performance of a targeted “next-generation” sequencing-informatic approach to identify genotypes. Five genotypes (chitose, ikeda, buffeli, type 4, and type 5) were defined; multiple genotypes were found within individual samples, with dominant and minor sequence types representing most genotypes. This study indicates that this sequencing-informatic workflow could be useful to assess the nature and extent of genetic variation within and among populations of T. orientalis on a large scale, and to potentially employ panels of distinct gene markers for expanded molecular epidemiological investigations of socioeconomically important protistan pathogens more generally.
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Ola-Fadunsin SD, Sharma RSK, Abdullah DA, Gimba FI, Jesse FFA, Sani RA. Molecular detection, prevalence and risk factors of Theileria orientalis infection among cattle in Peninsular Malaysia. Prev Vet Med 2020; 180:105027. [PMID: 32442824 DOI: 10.1016/j.prevetmed.2020.105027] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Revised: 04/22/2020] [Accepted: 05/08/2020] [Indexed: 11/16/2022]
Abstract
There is need to confirm the presence of Theileria orientalis among the cattle population in Peninsular Malaysia and to evaluate the risk factors associated with the infection. To this effect, blood samples were collected from 1045 cattle from 43 farms throughout the entire States of Peninsular Malaysia. The collected blood samples were subjected to DNA extraction and subsequent PCR amplification of the major piroplasm surface protein (MPSP) gene of the haemoprotozoan. Representative positive amplicons were purified, sequenced and compared with other sequences of the MPSP gene of T. orientalis curated from the GenBank. A well-structured questionnaire was used to get information about each cattle, it's demography, the bio-security, environmental and management factors. Univariate and multivariate analysis were used for the statistical evaluation, with significance set at p < 0.05. A total prevalence of 49.76% (520/1045; 95% CI: 46.73 - 52.79) was obtained. Types of breeds, age, production type, herd size, level of farm biosecurity, farm size, presence of other animal species in the farm, management systems and prophylaxis were significantly (p < 0.05) associated with the prevalence of T. orientalis. This study confirmed the presence of T. orientalis and establish that the haemoprotozoan is endemic among cattle in Peninsular Malaysia.
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Affiliation(s)
- Shola David Ola-Fadunsin
- Faculty of Veterinary Medicine, Universiti Putra Malaysia, UPM, 43400 Serdang, Selangor, Malaysia.
| | | | - Donea Abdurazak Abdullah
- Faculty of Veterinary Medicine, Universiti Putra Malaysia, UPM, 43400 Serdang, Selangor, Malaysia; Department of Animal Production, Northern Technical University Mosul, Mosul, Iraq
| | - Fufa Ido Gimba
- Faculty of Veterinary Medicine, Universiti Putra Malaysia, UPM, 43400 Serdang, Selangor, Malaysia; Avian Influenza Control Project Animal Health Component Desk Office, Taraba State Ministry of Agriculture and Natural Resources, Jalingo, Taraba, Nigeria
| | | | - Rehana Abdullah Sani
- Faculty of Veterinary Medicine, Universiti Putra Malaysia, UPM, 43400 Serdang, Selangor, Malaysia
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19
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Oakes VJ, Yabsley MJ, Schwartz D, LeRoith T, Bissett C, Broaddus C, Schlater JL, Todd SM, Boes KM, Brookhart M, Lahmers KK. Theileria orientalis Ikeda Genotype in Cattle, Virginia, USA. Emerg Infect Dis 2019; 25:1653-1659. [PMID: 31237835 PMCID: PMC6711211 DOI: 10.3201/eid2509.190088] [Citation(s) in RCA: 66] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
Theileria orientalis Ikeda genotype is a parasite that causes a disease in cattle that results in major economic issues in Asia, New Zealand, and Australia. The parasite is transmitted by Haemaphysalis longicornis ticks, which have recently been reported in numerous states throughout the eastern United States. Concurrently, cattle in Virginia showed clinical signs consistent with a hemoprotozoan infection. We used amplicons specific for the major piroplasm surface protein and small subunit rDNA of piroplasms to test blood samples from the cattle by PCR. Bidirectional Sanger sequencing showed sequences with 100% identity with T. orientalis Ikeda genotype 2 sequences. We detected the parasite in 3 unrelated herds and from various animals sampled at 2 time points. Although other benign T. orientalis genotypes are endemic to the United States, detection of T. orientalis Ikeda genotype might represent a risk for the cattle industry in Virginia.
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20
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Zhan X, He J, Yu L, Liu Q, Sun Y, Nie Z, Guo J, Zhao Y, Li M, Luo X, He L, Zhao J. Identification of a novel thrombospondin-related anonymous protein (BoTRAP2) from Babesia orientalis. Parasit Vectors 2019; 12:200. [PMID: 31053087 PMCID: PMC6500065 DOI: 10.1186/s13071-019-3457-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Accepted: 04/23/2019] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The thrombospondin-related anonymous protein (TRAP) was first discovered in the sporozoite of Plasmodium falciparum and TRAP family proteins are secreted by micronemes and transported to the parasite surface to participate in the invasion process. Various TRAP proteins have been identified in apicomplexan protozoans, but there have been few reports about TRAP proteins in Babesia orientalis. METHODS The functional domain of TRAP2 in B. orientalis was cloned, sequenced, characterized and compared to the TRAP sequences of related apicomplexan parasites. The functional domain of BoTRAP2 was truncated, named BoTRAP2-1, and then cloned into the pET-28a expression vector. Rabbit anti-rBoTRAP2-1 polyclonal antibody was produced by immunizing three rabbits. Western blot analysis was used to identify the native form and immunogenicity of BoTRAP2. The localization of BoTRAP2 was identified by indirect fluorescence assay (IFA). RESULTS The amplified genes of BoTRAP2 are 2817 bp in length, encoding a functional domain of about 938 aa with two vWFA domains, one TSP domain and one transmembrane domain. The amino acid sequence of BoTRAP2 has a high similarity with that of B. bovis and B. gibsoni. The predicted tertiary structure of truncated BoTRAP2-1 confirmed that BoTRAP2 contains two vWFA domains and a TSP domain, the main functional areas of the protein. The native BoTRAP2 was identified from B. orientalis lysate by using rabbit polyclonal anti-rBoTRAP2-1. A band corresponding to rBoTRAP2-1 was detected by reaction with serum from a B. orientalis-infected water buffalo, indicating that the protein has a high immunogenicity. IFA showed that BoTRAP2 is mainly localized on the apical end of parasites by rabbit anti-rBoTRAP2-1 polyclonal serum. CONCLUSIONS The rBoTRAP2 could differentiate serum from B. orientalis-infected water buffalo and normal water buffalo, implicating that BoTRAP2 has high immunogenicity and could serve as a candidate antigen for diagnosis of B. orientalis infection in buffalo.
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Affiliation(s)
- Xueyan Zhan
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, Hubei, China.,Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Wuhan, 430070, Hubei, China
| | - Junwei He
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, Hubei, China.,Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Wuhan, 430070, Hubei, China
| | - Long Yu
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, Hubei, China.,Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Wuhan, 430070, Hubei, China
| | - Qin Liu
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, Hubei, China.,Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Wuhan, 430070, Hubei, China
| | - Yali Sun
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, Hubei, China.,Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Wuhan, 430070, Hubei, China
| | - Zheng Nie
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, Hubei, China.,Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Wuhan, 430070, Hubei, China
| | - Jiaying Guo
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, Hubei, China.,Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Wuhan, 430070, Hubei, China
| | - Yangnan Zhao
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, Hubei, China.,Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Wuhan, 430070, Hubei, China
| | - Muxiao Li
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, Hubei, China.,Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Wuhan, 430070, Hubei, China
| | - Xiaoying Luo
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, Hubei, China.,Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Wuhan, 430070, Hubei, China
| | - Lan He
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, Hubei, China. .,Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Wuhan, 430070, Hubei, China. .,Key Laboratory of Animal Epidemical Disease and Infectious Zoonoses, Ministry of Agriculture, Huazhong Agricultural University, Wuhan, 430070, Hubei, China.
| | - Junlong Zhao
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, Hubei, China. .,Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Wuhan, 430070, Hubei, China. .,Key Laboratory of Animal Epidemical Disease and Infectious Zoonoses, Ministry of Agriculture, Huazhong Agricultural University, Wuhan, 430070, Hubei, China.
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Evolution and diversity of the EMA families of the divergent equid parasites, Theileria equi and T. haneyi. INFECTION GENETICS AND EVOLUTION 2019; 68:153-160. [DOI: 10.1016/j.meegid.2018.12.020] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Revised: 12/04/2018] [Accepted: 12/17/2018] [Indexed: 11/30/2022]
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Abstract
Theileriosis refers to the clinical disease caused by organisms from the genus Theileria, tick-borne haemoprotozoans infecting a diverse range of mammalian hosts. In Australia, Theileria spp. have been identified in both domestic and wildlife species but the bovine parasite, Theileria orientalis, has received the most attention due to the emergence and spread of clinical disease over the past 12 years, particularly in cattle herds on the east coast. At an estimated $20million per annum, the burden to cattle production is significant but despite over a decade of disease, there are still no effective chemotherapeutic treatments or vaccines available in Australia. Recent insights from genome sequencing studies reveal species level diversity within T. orientalis, which may help direct efforts at disease control.
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