1
|
Jacob SS, Sengupta PP, Kumar HBC, Maharana SM, Goudar A, Chandu AGS, Rakshitha TS, Shivakumar V, Gulati BR, Reddy GBM. Unveiling genotypic diversity of Theileria orientalis in lethal outbreaks among bovines in Karnataka, India. Parasitol Res 2024; 123:202. [PMID: 38703234 DOI: 10.1007/s00436-024-08227-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Accepted: 04/29/2024] [Indexed: 05/06/2024]
Abstract
Theileria orientalis, the causal agent of oriental theileriosis, is known to cause mild disease in cattle and buffalo across the world. Recently, different genotypes of T. orientalis have emerged as pathogenic, causing high reported morbidity in cattle. This study focuses on investigating three suspected outbreaks of oriental theileriosis that resulted in fatalities among crossbred and indigenous bulls in Karnataka, India. Examination of blood smears revealed the presence of T. orientalis piroplasms within erythrocytes. The genetic characterization of T. orientalis was conducted by targeting specific markers, including the mpsp gene, p23 gene, and ribosomal DNA markers (18S rRNA gene, ITS-1, and ITS-2). Analysis based on the 18S rRNA gene unveiled the presence of both Type A and Type E genotypes of T. orientalis in the outbreaks. The mpsp gene-based analysis identified genotype 7 of T. orientalis in crossbred cows, whereas genotype 1 (Chitose B) was found to be present in indigenous bulls. Haplotype network analysis based on the mpsp gene revealed the presence of 39 distinct haplotypes within the 12 defined genotypes of T. orientalis with a high haplotype diversity of 0.9545 ± 0.017. Hematological and biochemical analysis revealed a decrease in calcium, hemoglobin levels, red blood cell counts, and phosphorus. This study constitutes the initial documentation of a clinical outbreak of oriental theileriosis in indigenous bulls with genotype 1 (Chitose 1B). Substantial epidemiological investigations are imperative to gain a comprehensive understanding of the geographical distribution of distinct genotypes and the diverse clinical manifestations of the disease across various hosts.
Collapse
Affiliation(s)
- Siju Susan Jacob
- ICAR National Institute of Veterinary Epidemiology and Disease Informatics, Ramagondanahalli, Yelahanka, Bengaluru, 560064, Karnataka, India
| | - Pinaki Prasad Sengupta
- ICAR National Institute of Veterinary Epidemiology and Disease Informatics, Ramagondanahalli, Yelahanka, Bengaluru, 560064, Karnataka, India
| | - H B Chethan Kumar
- ICAR National Institute of Veterinary Epidemiology and Disease Informatics, Ramagondanahalli, Yelahanka, Bengaluru, 560064, Karnataka, India
| | - S Madhaba Maharana
- ICAR National Institute of Veterinary Epidemiology and Disease Informatics, Ramagondanahalli, Yelahanka, Bengaluru, 560064, Karnataka, India
| | - Akshata Goudar
- ICAR National Institute of Veterinary Epidemiology and Disease Informatics, Ramagondanahalli, Yelahanka, Bengaluru, 560064, Karnataka, India
| | - A G S Chandu
- ICAR National Institute of Veterinary Epidemiology and Disease Informatics, Ramagondanahalli, Yelahanka, Bengaluru, 560064, Karnataka, India
| | - T S Rakshitha
- ICAR National Institute of Veterinary Epidemiology and Disease Informatics, Ramagondanahalli, Yelahanka, Bengaluru, 560064, Karnataka, India
| | - V Shivakumar
- Veterinary College, KVAFSU, Hassan, Karnataka, India
| | - Baldev R Gulati
- ICAR National Institute of Veterinary Epidemiology and Disease Informatics, Ramagondanahalli, Yelahanka, Bengaluru, 560064, Karnataka, India
| | | |
Collapse
|
2
|
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.
Collapse
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;
| |
Collapse
|
3
|
Distribution and Prevalence of Theileria orientalis Genotypes in Adult Lactating Dairy Cows in South West Region of Western Australia. Pathogens 2023; 12:pathogens12010125. [PMID: 36678473 PMCID: PMC9866761 DOI: 10.3390/pathogens12010125] [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: 12/06/2022] [Revised: 01/10/2023] [Accepted: 01/10/2023] [Indexed: 01/15/2023] Open
Abstract
Bovine anaemia caused by Theileria orientalis group (BATOG) causes significant production and economic losses in Australia's cattle industry. The pathogenic T. orientalis genotypes reported in Australian cattle are type 1 (Chitose) and type 2 (Ikeda). The present study aimed to determine the prevalence and distribution of T. orientalis genotypes in adult lactating cows in Western Australia (WA) dairy herds. A total of 100 whole blood samples from lactating cows from 10 farms were obtained and screened for T. orientalis using polymerase chain reaction (PCR). Sanger sequencing was subsequently used to characterise T. orientalis genotypes isolated from positive samples. A total of thirteen cows (13%; 95% CI: 7.1-21.2%) were positive for T. orientalis, and six out of ten farms (60%; 95% CI: 26.2-87.8%) housed at least one T. orientalis-positive cow. The distribution of T. orientalis was found to be wide and dense in the South west region of WA and the southern coast of WA. The predominant T. orientalis genotype identified was Ikeda (n = 11, 11%; 95% CI: 5.6-18.8%), while the Buffeli genotype was identified in WA for the first time, albeit at a low prevalence (n = 1, 1%; 95% CI: 0.0-5.4%). This study has provided useful epidemiological evidence on the prevalence and distribution of T. orientalis in adult lactating dairy cows in WA dairy farms, and on the importance of conducting widespread surveillance programs for the understanding of BATOG in WA.
Collapse
|
4
|
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.
Collapse
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
| |
Collapse
|
5
|
Ozubek S, Ulucesme MC, Cirak VY, Aktas M. Detection of Theileria orientalis Genotypes from Cattle in Kyrgyzstan. Pathogens 2022; 11:pathogens11101185. [PMID: 36297242 PMCID: PMC9606894 DOI: 10.3390/pathogens11101185] [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: 09/15/2022] [Revised: 10/11/2022] [Accepted: 10/13/2022] [Indexed: 11/28/2022] Open
Abstract
The ikeda and chitose genotypes of Theileria orientalis, which for many years were thought to be benign, cause a disease that results in significant economic losses in the cattle industry. This study was carried out in order to determine the genotypes of T. orientalis in cattle in Kyrgyzstan, and 149 archived DNA samples known to be T. orientalis were analyzed by the PCR amplification of the major piroplasm surface protein (MPSP) gene region. Single-Strand Conformation Polymorphism (SSCP) analysis was performed to uncover the nucleotide changes in the archived DNA samples, and 15 samples showing different band profiles were subjected to sequence analysis. As a result of the sequence analysis, it was seen that the samples belonged to the buffeli and chitose A genotypes. In order to identify mixed genotypes, PCR was performed using primers specific for these genotypes, and buffeli (type 3), chitose (type 1) and buffeli+chitose were found to be positive in 26.2%, 2% and 71.8% of samples, respectively. As a result of this study, we showed the presence of buffeli (type 3) and chitose (type 1) genotypes of T. orientalis in cattle in Kyrgyzstan. Comprehensive epidemiological studies are needed to understand the clinical infections caused by the pathogenic chitose A and to determine the geographical distribution and different genotypes of T. orientalis.
Collapse
Affiliation(s)
- Sezayi Ozubek
- Department of Parasitology, Faculty of Veterinary Medicine, University of Firat, Elazig 23119, Turkiye
- Correspondence:
| | - Mehmet Can Ulucesme
- Department of Parasitology, Faculty of Veterinary Medicine, University of Firat, Elazig 23119, Turkiye
| | - Veli Yılgor Cirak
- Department of Parasitology, Faculty of Veterinary Medicine, Bursa Uludag University, Bursa 23119, Turkiye
| | - Munir Aktas
- Department of Parasitology, Faculty of Veterinary Medicine, University of Firat, Elazig 23119, Turkiye
| |
Collapse
|
6
|
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.
Collapse
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
| |
Collapse
|
7
|
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.
Collapse
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:
| |
Collapse
|
8
|
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]
|
9
|
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.
Collapse
Affiliation(s)
- David Lyall Emery
- Sydney school of Veterinary Science, University of Sydney, Sydney, NSW 2006, Australia
| |
Collapse
|
10
|
Merozoites of Theileria orientalis buffeli reduce the parasitaemia of T. orientalis ikeda following tick challenge. Vet Parasitol 2021; 298:109532. [PMID: 34325298 DOI: 10.1016/j.vetpar.2021.109532] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2021] [Revised: 07/14/2021] [Accepted: 07/17/2021] [Indexed: 11/24/2022]
Abstract
Theileria orientalis is a tick-borne protozoal parasite causing anaemia and death in susceptible cattle. This investigation aimed to confirm whether immunisation with the "benign" buffeli genotype of T. orientalis could reduce the parasitaemia of the virulent ikeda genotype. Calves were inoculated intravenously or subcutaneously with bovine blood containing merozoites of T. orientalis buffeli and when recipients became positive by PCR, they and control calves were challenged with unfed nymphs of Haemaphysalis longicornis ticks infected as larvae with T. orientalis ikeda. All calves became positive for the challenge within 12 days after tick application. In the immunised calves, the first wave of parasitaemia with T. orientalis ikeda from 4 to 6 weeks was reduced significantly by >80 % before the parasite burden declined into the carrier state by 9 weeks. The parasitaemias in two calves which exhibited low infections with T. orientalis ikeda shortly after arrival, were also significantly reduced after tick challenge. The results confirm the previous studies on immunity to T. sergenti in Japan, and field experience with theileriosis in endemic zones where the carrier state appears to prevent clinical disease despite repeated, seasonal tick infestations with virulent genotypes of the parasite. This method offers a means to reduce the severity of the first wave of theilerial parasitaemia after tick challenge and possibly recover associated production losses.
Collapse
|
11
|
A longitudinal study of infection with genotypes of Theileria orientalis in calves and introduced cattle at Dorrigo, New South Wales, and the effect on weight gains. Vet Parasitol 2021; 296:109487. [PMID: 34175676 DOI: 10.1016/j.vetpar.2021.109487] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Revised: 05/31/2021] [Accepted: 06/01/2021] [Indexed: 11/21/2022]
Abstract
BACKGROUND In regions with endemic Theileria orientalis, recovered cattle are carriers, leaving newborn calves and introduced stock as the most susceptible groups to develop clinical disease after tick infestation with parasite transmission. METHODS To gain information on the kinetics of infection and development and effects of theileriosis caused by virulent ikeda and chitose genotypes and the "benign" buffeli genotype of T.orientalis, this study sampled a total of 134 calves from 3 farms in Dorrigo, Australia, a region with multiple genotypes of the parasite. In addition, 30 introduced beef weaners were bled and weighed for 6 months after arrival. RESULTS In both cohorts, parasitaemia with the ikeda and chitose (genotypes 1 & 2) of T.orientalis was detectable by PCR within 3-4 weeks in >95 % of the groups, with maximal gene copies generated around 5-7 weeks after birth or introduction, before declining. In contrast, parasitaemias of T.orientalis buffeli (genotype 3), increased slowly, with around 80 % of the population testing positive by PCR after 4 months. The parasitaemias of the buffeli genotype did not exceed 40,000 gene copies /ul and were similar to those exhibited by ikeda and chitose genotypes following the "first wave of parasitaemia" as cattle entered the carrier state. In the 30 introduced weaners, the early infection with T.orientalis ikeda and chitose also caused significant reductions in packed cell volume (PCV) and incurred an estimated 20Kg loss in weight gain; the latter had not been recovered by 6 months after introduction. CONCLUSIONS The results support previous findings in other endemic regions of theileriosis, and imply that amelioration of the early high levels of parasitosis by the virulent genotypes could reduce the initial impact of theileriosis on production, which appears much less affected once animals enter the carrier state.
Collapse
|
12
|
Lakew BT, Kheravii SK, Wu SB, Eastwood S, Andrew NR, Jenkins C, Walkden-Brown SW. Endemic infection of cattle with multiple genotypes of Theileria orientalis on the Northern Tablelands of New South Wales despite limited presence of ticks. Ticks Tick Borne Dis 2020; 12:101645. [PMID: 33388554 DOI: 10.1016/j.ttbdis.2020.101645] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Revised: 12/18/2020] [Accepted: 12/21/2020] [Indexed: 11/28/2022]
Abstract
Bovine theileriosis, caused by the Theileria orientalis complex, causes a mild persistent infection with the severity dependent on the infecting genotype and host exposure status. Clinical theileriosis was first detected on the Northern Tablelands of NSW in 2009 and a high prevalence of infection in cattle reported in 2013. However, the parasite was not genotyped and likely vectors not investigated. In response to ongoing clinical cases, here we identify the Theileria genotypes present in the region and potential vectors. Genotype-specific multiplex qPCR of 90 blood samples from eight farms revealed a 100 % prevalence of T. orientalis in individual cattle with concurrent infection with all three genotypes present in 73 % of cases. The prevalence of the pathogenic genotype (Ikeda) differed significantly between farms; however, the level of parasitemia was not affected by genotype or associated with clinical disease. Parasitaemia levels were higher in heifers than cows. Questing tick collection on six of the farms between November 2017 and May 2019 yielded 358 questing ticks from one farm, all of which were morphologically identified as Haemaphysalis bancrofti. Larvae accounted for 59 % of the ticks followed by nymphs (34 %) and adults (7%). Theileria was detected only in nymphs with Ikeda and Buffeli genotypes each being detected in one of four pools of ticks. The high prevalence of co-infection with three genotypes of T. orientalis indicates that they are now endemic in the region and confirms the lack of cross-protection between genotypes. This is the first detection of T. orientalis in questing H. bancrofti ticks: indicating that it may be a vector for T. orientalis in this region. However, the high prevalence of bovine infection is at odds with the absence of captured ticks or history of tick infestation on five of the six farms raising the possibility that other vectors or transmission pathways play key roles.
Collapse
Affiliation(s)
- Biniam T Lakew
- School of Environmental and Rural Science, University of New England, Armidale, NSW, 2351, Australia; College of Veterinary Medicine, Haramaya University, P. O. Box 138, Dire Dawa, Ethiopia.
| | - Sarbast K Kheravii
- School of Environmental and Rural Science, University of New England, Armidale, NSW, 2351, Australia
| | - Shu-Biao Wu
- School of Environmental and Rural Science, University of New England, Armidale, NSW, 2351, Australia
| | - Steve Eastwood
- Local Land Services, Northern Tablelands, Armidale, 2350, NSW, Australia
| | - Nigel R Andrew
- School of Environmental and Rural Science, University of New England, Armidale, NSW, 2351, Australia; Insect Ecology Lab, Zoology, Centre for Behavioural and Physiological Ecology, University of New England, Armidale, NSW, 2351, Australia
| | - Cheryl Jenkins
- Department of Primary Industries, Elizabeth Macarthur Agricultural Institute, Menangle, NSW, 2568, Australia
| | - Stephen W Walkden-Brown
- School of Environmental and Rural Science, University of New England, Armidale, NSW, 2351, Australia
| |
Collapse
|
13
|
Forshaw D, Alex SM, Palmer DG, Cotter J, Roberts WD, Jenkins C, Hair S. Theileria orientalis
Ikeda genotype infection associated with anaemia, abortion and death in beef cattle in Western Australia. Aust Vet J 2020; 98:290-297. [DOI: 10.1111/avj.12937] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Revised: 01/12/2020] [Accepted: 01/30/2020] [Indexed: 11/28/2022]
Affiliation(s)
- D Forshaw
- Department of Primary Industries and Regional Development Albany Western Australia 6330 Australia
| | - SM Alex
- NSW Department of Primary Industries Elizabeth Macarthur Agricultural Institute Menangle New South Wales 2568 Australia
| | - DG Palmer
- Department of Primary Industries and Regional Development South Perth WA 6151 Australia
| | - J Cotter
- Department of Primary Industries and Regional Development Albany Western Australia 6330 Australia
| | - WD Roberts
- Department of Primary Industries and Regional Development Albany Western Australia 6330 Australia
| | - C Jenkins
- NSW Department of Primary Industries Elizabeth Macarthur Agricultural Institute Menangle New South Wales 2568 Australia
| | - S Hair
- Department of Primary Industries and Regional Development South Perth WA 6151 Australia
| |
Collapse
|
14
|
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.
Collapse
|
15
|
Selim AM, Senapati SK, Das M, Mishra C, Patra RC, Panda SK. Molecular, epidemiological and haematological evaluation in Theileria orientalis infected cattle from an endemic region in India. Anim Biotechnol 2020; 32:663-670. [PMID: 32163002 DOI: 10.1080/10495398.2020.1738450] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
The objective of the present study was to investigate the epidemiological and haematological parameters with simultaneous molecular detection of Theileria orientalis infection of crossbred jersey (CBJ) cattle. Haematological values like mean hemoglobin (Hb) (7.31 ± 2.3 g/dl), packed cell volume (PCV) (21.69 ± 6.11%), red blood cells count (RBCs) (4.40 ± 1.6 M/μl), white blood cells count (WBCs) (6.93 ± 3.06 103/µl) and mean corpuscular hemoglobin concentration (MCHC) (33.56 ± 3.51 g/dl) were decreased significantly (p < 0.05), whereas mean corpuscular volume (MCV) (51.06 ± 6.14fl) and eosinophil count (0.39 ± 0.44 103/µl) were significantly (p < 0.05) increased in cattle infected with T. orientalis. Analysis of major piroplasm surface protein (MPSP) of 110 blood samples randomly collected from cattle from seven districts by PCR indicated that an average of 70% of cattle was positive for T. orientalis infection. In particular, Puri and Khorda districts were identified as relatively high-risk areas for T. orientalis infection, with infection rates of 76.66% and 72.4%, respectively. The phylogenetic analysis of isolated T. orientalis MPSP gene (MN334767) classified it into type 5. Earlier Indian isolates were classified into three types viz.type 1, type 3 and type 7 and this is the first time to detect type 5 in Odisha, India.
Collapse
Affiliation(s)
- Ahmed Magdy Selim
- Internal Medicine, Infectious and Fish diseases Department, Faculty of Veterinary Medicine, Mansoura University, Mansoura, Egypt
| | - Santosh Kumar Senapati
- Department of Clinical Medicine, College of Veterinary Science and Animal Husbandry, Orissa University of Agriculture and Technology, Bhubaneswar, India
| | - Manoranjan Das
- Department of Clinical Medicine, College of Veterinary Science and Animal Husbandry, Orissa University of Agriculture and Technology, Bhubaneswar, India
| | - Chinmoy Mishra
- Department of Animal Breeding and Genetics, College of Veterinary Science and Animal Husbandry, Orissa University of Agriculture and Technology, Bhubaneswar, India
| | - Ramesh Chandra Patra
- Department of Clinical Medicine, College of Veterinary Science and Animal Husbandry, Orissa University of Agriculture and Technology, Bhubaneswar, India
| | - Susen Kumar Panda
- Department of Veterinary Pathology, College of Veterinary Science and Animal Husbandry, Orissa University of Agriculture and Technology, Bhubaneswar, India
| |
Collapse
|
16
|
Evaluation of the efficacy of ivermectin against Theileria orientalis infection in grazing cattle. BMC Vet Res 2019; 15:297. [PMID: 31420047 PMCID: PMC6697941 DOI: 10.1186/s12917-019-2042-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2019] [Accepted: 08/05/2019] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Raising cattle on pastures is known to be beneficial for animal welfare and cost reduction. However, grazing is associated with the risk of contracting tick-borne diseases, such as theileriosis. Here, the efficacy of ivermectin against these diseases and associated clinical symptoms were evaluated. RESULTS A total of 68 cattle from a grazing cattle farm were selected and divided into two groups: the control group (17 cattle) with no preventive treatment and the ivermectin-treated group (51 cattle) in which cattle were treated with pour-on ivermectin prior to grazing. The infection rates of Theileria orientalis and the red blood cell (RBC) profile (e.g., RBC count, hematocrit value, and hemoglobin concentration) were compared in the spring (before grazing) and summer (during grazing) between the two groups. Based on PCR amplification of the major piroplasm surface protein (MPSP) gene, 12 cattle were positive for T. orientalis infection. Phylogenetic analysis revealed that the isolates identified in this study consisted of three MPSP types (1, 2, and 7). The T. orientalis infection rate in the control group during grazing was 3-fold higher than that in the ivermectin-treated group. Moreover, differences in RBC parameters during grazing were greater in the control group than in the ivermectin-treated group. In particular, the hematocrit value was significantly reduced in the control group. CONCLUSIONS The results of this study demonstrated that ivermectin had protective effects against T. orientalis infection and RBC hemolysis in grazing cattle.
Collapse
|
17
|
Özübek S, Aktaş M. Genetic diversity of Theileria orientalis from cattle in Turkey. Comp Immunol Microbiol Infect Dis 2019; 65:132-136. [PMID: 31300102 DOI: 10.1016/j.cimid.2019.05.015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2019] [Revised: 05/11/2019] [Accepted: 05/13/2019] [Indexed: 10/26/2022]
Abstract
Theileria orientalis is usually a benign parasite but some genotypes cause infection and economic losses to the cattle industry. This study was carried out to determine T. orientalis genotypes in cattle. T. orientalis positive 63 sample were analyzed by amplifying the MPSP gene region by PCR. As a result of the SSCP analysis, samples with different band profiles were sent to the sequence analysis and genotypes were determined. T. orientalis genotype-specific PCR was performed to determine the mix genotypes. Type 1 (chitose), type 3 and type 1-type 3 mix were found positive 11.1%, 46%, and 17.5% respectively. In addition, phylogenetic analysis was performed to separate the chitose genotypes, and two samples were found in chitose A, one sample was found in chitose B. Although chitose A genotype is suggested to be more pathogenic than chitose B, but there is little evidence for this. As a result of this study, we showed the presence of pathogenic genotype T. orientalis in Turkey. Therefore, extensive epidemiological studies are required to understand the geographic distribution, different genotypes and clinical pathologies of T. orientalis.
Collapse
Affiliation(s)
- Sezayi Özübek
- Department of Parasitology, College of Veterinary Medicine, Firat University, 23119, Elazig, Turkey.
| | - Münir Aktaş
- Department of Parasitology, College of Veterinary Medicine, Firat University, 23119, Elazig, Turkey
| |
Collapse
|
18
|
Bogema DR, Micallef ML, Liu M, Padula MP, Djordjevic SP, Darling AE, Jenkins C. Analysis of Theileria orientalis draft genome sequences reveals potential species-level divergence of the Ikeda, Chitose and Buffeli genotypes. BMC Genomics 2018; 19:298. [PMID: 29703152 PMCID: PMC5921998 DOI: 10.1186/s12864-018-4701-2] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Accepted: 04/18/2018] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Theileria orientalis (Apicomplexa: Piroplasmida) has caused clinical disease in cattle of Eastern Asia for many years and its recent rapid spread throughout Australian and New Zealand herds has caused substantial economic losses to production through cattle deaths, late term abortion and morbidity. Disease outbreaks have been linked to the detection of a pathogenic genotype of T. orientalis, genotype Ikeda, which is also responsible for disease outbreaks in Asia. Here, we sequenced and compared the draft genomes of one pathogenic (Ikeda) and two apathogenic (Chitose, Buffeli) isolates of T. orientalis sourced from Australian herds. RESULTS Using de novo assembled sequences and a single nucleotide variant (SNV) analysis pipeline, we found extensive genetic divergence between the T. orientalis genotypes. A genome-wide phylogeny reconstructed to address continued confusion over nomenclature of this species displayed concordance with prior phylogenetic studies based on the major piroplasm surface protein (MPSP) gene. However, average nucleotide identity (ANI) values revealed that the divergence between isolates is comparable to that observed between other theilerias which represent distinct species. Analysis of SNVs revealed putative recombination between the Chitose and Buffeli genotypes and also between Australian and Japanese Ikeda isolates. Finally, to inform future vaccine studies, dN/dS ratios and surface location predictions were analysed. Six predicted surface protein targets were confirmed to be expressed during the piroplasm phase of the parasite by mass spectrometry. CONCLUSIONS We used whole genome sequencing to demonstrate that the T. orientalis Ikeda, Chitose and Buffeli variants show substantial genetic divergence. Our data indicates that future researchers could potentially consider disease-associated Ikeda and closely related genotypes as a separate species from non-pathogenic Chitose and Buffeli.
Collapse
Affiliation(s)
- Daniel R Bogema
- NSW Department of Primary Industries, Elizabeth Macarthur Agricultural Institute, Menangle, NSW, Australia
| | - Melinda L Micallef
- NSW Department of Primary Industries, Elizabeth Macarthur Agricultural Institute, Menangle, NSW, Australia
| | - Michael Liu
- The ithree institute, University of Technology Sydney, Ultimo, NSW, Australia
| | - Matthew P Padula
- The ithree institute, University of Technology Sydney, Ultimo, NSW, Australia
| | - Steven P Djordjevic
- The ithree institute, University of Technology Sydney, Ultimo, NSW, Australia
| | - Aaron E Darling
- The ithree institute, University of Technology Sydney, Ultimo, NSW, Australia
| | - Cheryl Jenkins
- NSW Department of Primary Industries, Elizabeth Macarthur Agricultural Institute, Menangle, NSW, Australia.
| |
Collapse
|
19
|
Kim S, Yu DH, Chae JB, Choi KS, Kim HC, Park BK, Chae JS, Park J. Pathogenic genotype of major piroplasm surface protein associated with anemia in Theileria orientalis infection in cattle. Acta Vet Scand 2017; 59:51. [PMID: 28750636 PMCID: PMC5532781 DOI: 10.1186/s13028-017-0318-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Accepted: 07/19/2017] [Indexed: 11/10/2022] Open
Abstract
Serious disease outbreaks in cattle caused by Theileria orientalis have emerged in the Asia-Pacific region. Genetic variables of the major piroplasm surface protein (MPSP) expressed on the surface of the piroplasm inside T. orientalis-infected erythrocytes are considered to be associated with variation in the pathogenicity of T. orientalis. Our study describes the clinically relevant MPSP types associated with anemia in Theileria-infected cattle. These results revealed that MPSP expression plays an important role in hematological alterations in Theileria-infected cattle, and that MPSP type 1 is strongly associated with bovine anemia, which can be a potential target for the prevention of bovine theileriosis.
Collapse
|
20
|
Swilks E, Jenkins C, Poynting A, Collins D, Krebs GL. Prevalence and effect of Theileria orientalis
infection in homebred calves in the Gloucester region of New South Wales, Australia. Aust Vet J 2017; 95:211-216. [DOI: 10.1111/avj.12593] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2015] [Revised: 07/27/2016] [Accepted: 07/28/2016] [Indexed: 11/26/2022]
Affiliation(s)
- E Swilks
- School of Animal and Veterinary Sciences; Charles Sturt University; Locked Bag 588 Wagga Wagga New South Wales 2678 Australia
| | - C Jenkins
- NSW Department of Primary Industries; Elizabeth Macarthur Agricultural Institute; Camden NSW Australia
| | - A Poynting
- Gloucester Veterinary Hospital; Gloucester NSW Australia
| | - D Collins
- NSW Department of Primary Industries; Elizabeth Macarthur Agricultural Institute; Camden NSW Australia
| | - GL Krebs
- School of Animal and Veterinary Sciences; Charles Sturt University; Locked Bag 588 Wagga Wagga New South Wales 2678 Australia
| |
Collapse
|
21
|
Swilks E, Fell SA, Hammer JF, Sales N, Krebs GL, Jenkins C. Transplacental transmission of Theileria orientalis occurs at a low rate in field-affected cattle: infection in utero does not appear to be a major cause of abortion. Parasit Vectors 2017; 10:227. [PMID: 28482923 PMCID: PMC5423014 DOI: 10.1186/s13071-017-2166-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Accepted: 05/02/2017] [Indexed: 01/08/2023] Open
Abstract
Background Bovine theileriosis, caused by the haemoprotozoan Theileria orientalis, is an emerging disease in East Asia and Australasia. Previous studies have demonstrated transplacental transmission of various Theileria spp. but molecular confirmation of transplacental transmission of T. orientalis has never been confirmed in the field. In this study, cow-calf (< 48 h old) pairs were sampled across 3 herds; opportunistic samples from aborted foetuses or stillborn calves were also examined. Molecular (multiplex qPCR) and serological (ELISA) methods were used to determine infection prevalence and the presence of anti-Theileria antibodies in each herd. In addition, pregnant heifers and foetal calves were sampled at abattoir and tested for the presence of T. orientalis by qPCR. Results The qPCR results indicated that, even though there was a high prevalence of T. orientalis infection in cows, the rate of transplacental transmission to their calves was low, with only one newborn calf from one herd and one foetus from the abattoir testing positive for T. orientalis DNA. Five aborted foetuses and stillborn calves, 3 of which were derived from a herd experiencing a high number of clinical theileriosis cases at the time of sampling, all tested negative for T. orientalis by qPCR. This suggests that in utero infection of calves with T. orientalis may not be a major driver of abortions during theileriosis outbreaks. Temporal monitoring of 20 calves born to T. orientalis-positive mothers indicated that T. orientalis was detectable in most calves between 10 and 27 days post-partum, consistent with prior field studies on adult cattle introduced to Theileria-affected herds. There was a positive correlation between the ELISA ratio of newborn calves and their mothers within 48 h of calving; however, maternal antibodies were only detectable in some calves and only for 4–4.5 weeks post-partum. All calves displayed high parasite loads peaking at 4–8 weeks post-partum, with only some calves subsequently mounting a detectable adaptive antibody response. Conclusions These findings indicate transplacental transmission of T. orientalis appears to play only a minor role in persistence of T. orientalis infection in the field; however calves are highly susceptible to developing high level T. orientalis infections at 4–8 weeks of age regardless of whether maternal antibodies are present post-partum. Electronic supplementary material The online version of this article (doi:10.1186/s13071-017-2166-9) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Emma Swilks
- School of Animal and Veterinary Sciences, Charles Sturt University, Locked Bag 588, Wagga Wagga, NSW, 2678, Australia
| | - Shayne A Fell
- NSW Department of Primary Industries, Elizabeth Macarthur Agricultural Institute, Woodbridge Rd, Menangle, NSW, 2568, Australia
| | - Jade F Hammer
- Main Street Veterinary Clinic, 325 Main Street, Bairnsdale, Vic, 3875, Australia
| | - Narelle Sales
- NSW Department of Primary Industries, Elizabeth Macarthur Agricultural Institute, Woodbridge Rd, Menangle, NSW, 2568, Australia
| | - Gaye L Krebs
- School of Animal and Veterinary Sciences, Charles Sturt University, Locked Bag 588, Wagga Wagga, NSW, 2678, Australia
| | - Cheryl Jenkins
- NSW Department of Primary Industries, Elizabeth Macarthur Agricultural Institute, Woodbridge Rd, Menangle, NSW, 2568, Australia.
| |
Collapse
|
22
|
Gebrekidan H, Abbas T, Wajid M, Ali A, Gasser RB, Jabbar A. Molecular characterisation of Theileria orientalis in imported and native bovines from Pakistan. INFECTION GENETICS AND EVOLUTION 2016; 47:19-25. [PMID: 27838527 DOI: 10.1016/j.meegid.2016.11.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Revised: 11/05/2016] [Accepted: 11/05/2016] [Indexed: 11/16/2022]
Abstract
The epidemiological aspects of Theileria orientalis in Pakistan are unknown; therefore, investigations using sensitive and precise molecular techniques are required. This study reports the first molecular characterisation of T. orientalis detected from imported (Bos taurus) and native cattle (Bos indicus×Bos taurus) and buffaloes (Bubalus bubalis) selected from four districts of Punjab, Pakistan. DNA samples from blood (n=246) were extracted and tested using conventional PCR utilising the major piroplasm surface protein (MPSP) gene and multiplexed tandem PCR (MT-PCR). Theileria orientalis DNA was detected (15%; 22/147) only in imported cattle by conventional PCR, whereas 24.5% (36/147), 6% (3/50) and 6.1% (3/49) of the imported cattle and native Pakistani cattle and buffaloes, respectively were test-positive for T. orientalis using MT-PCR. Using MT-PCR, the prevalence of T. orientalis was significantly higher (P<0.0001) in imported cattle compared to that of detected in native Pakistani bovines. The prevalence of T. orientalis and DNA copies of chitose and ikeda were significantly higher (P<0.05) in imported cattle than those detected in native Pakistani bovines. DNA sequencing of amplicons of the conventional PCR revealed the presence of buffeli, chitose and ikeda genotypes of T. orientalis. Phylogenetic analysis revealed that the MPSP sequences of buffeli, chitose and ikeda from imported cattle were closely related to those sequences reported previously from Australia and other regions. This study provides the first survey of T. orientalis infection in imported and native bovines in Pakistan, and highlights the need for future studies to understand the spread of transboundary animal diseases.
Collapse
Affiliation(s)
- Hagos Gebrekidan
- Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Werribee, Victoria, Australia.
| | - Tariq Abbas
- University College of Veterinary and Animal Sciences, The Islamia University of Bahawalpur, Bahawalpur, Punjab, Pakistan
| | - Muhammad Wajid
- Health Biotechnology Division, National Institute for Biotechnology and Genetic Engineering, Faisalabad, Punjab, Pakistan
| | - Aamir Ali
- Health Biotechnology Division, National Institute for Biotechnology and Genetic Engineering, Faisalabad, Punjab, Pakistan
| | - Robin B Gasser
- Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Werribee, Victoria, Australia
| | - Abdul Jabbar
- Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Werribee, Victoria, Australia.
| |
Collapse
|
23
|
Masatani T, Yoshihara S, Matsubara A, Gotoh T, Takahashi H, Tanaka T, Andoh M, Endo Y, Matsuo T. Dynamics of Theileria orientalis genotype population in cattle in a year-round grazing system. Acta Parasitol 2016; 61:419-24. [PMID: 27078669 DOI: 10.1515/ap-2016-0056] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2015] [Accepted: 01/19/2016] [Indexed: 11/15/2022]
Abstract
Theirelia orientalis is a tick-borne haemoprotozoan parasite, and infection with this parasite is one of the most important diseases for grazing cattle. Co-infection of cattle with different genotypes of T. orientalis often occurs. In this study, we investigated the temporal dynamics of genotypes in cattle in a year-round grazing system in Japan. Genotype-specific PCR assays to determine major piroplasm surface protein (MPSP) genotypes (types 1 to 5) of T. orientalis were performed by using time-course blood samples collected from grazing cattle and ticks in a pasture. All 20 cattle investigated in this study were infected with T. orientalis. By using genotype-specific PCR, we detected the combination of genotypes of T. orientalis (types 1 to 5) from each cattle. These multiple genotypes of T. orientalis were also confirmed in ticks. Notably, each genotype of T. orientalis in cattle was temporally detected from cattle and more variable genotypes were found in summer. The observed temporal dynamics of the MPSP genotypes of T. orientalis in cattle could be explained by host immunity against the parasites or genetic recombination of parasite in ticks.
Collapse
|
24
|
Jenkins C, Bogema DR. Factors associated with seroconversion to the major piroplasm surface protein of the bovine haemoparasite Theileria orientalis. Parasit Vectors 2016; 9:106. [PMID: 26912048 PMCID: PMC4766684 DOI: 10.1186/s13071-016-1395-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2015] [Accepted: 02/20/2016] [Indexed: 11/19/2022] Open
Abstract
Background Bovine theileriosis caused by Theileria orientalis is an emerging disease of cattle in the Asia-Pacific region where it causes a significant economic burden to meat and milk production. While host immunological responses to the lymphocyte-transforming species of Theileria, T. parva and T. annulata, have been well studied, little is known about the immune response to this non-transforming species. Methods We developed a recombinant antigen ELISA based on the major piroplasm surface protein (MPSP) of T. orientalis and investigated whether seroconversion to the MPSP was associated with clinical factors (anaemia), parasite burden and parasite genotype. We also examined the dynamics of seroconversion in animals acutely infected with T. orientalis. Results In cattle testing qPCR positive for T. orientalis, seroconversion was more frequent in anaemic compared to normal cattle (P < 0.0001). The ELISA ratio (ER) was highly correlated with total parasite burden as measured by qPCR (r = 0.69; P < 0.0001); however when loads of individual genotypes of the parasite were examined, only the pathogenic Ikeda genotype was highly correlated with ER. Conversely, seroconversion was less frequently detected in the presence of benign T. orientalis genotypes. Temporal measurement of the serological response, parasite burden and packed cell volume (PCV) in acutely infected animals revealed that seroconversion to the MPSP occurs within 2-3 weeks of the initial qPCR detection of the parasite and coincides with a peak in infection intensity and a declining PCV. Conclusion Whether the serological response to the MPSP is immunoprotective against re-infection or recrudescence requires further investigation; however the MPSP represents a promising target for a subunit vaccine given that genetic variability within the MPSP results in differential pathogenicity of T. orientalis.
Collapse
Affiliation(s)
- Cheryl Jenkins
- NSW Department of Primary Industries, Elizabeth Macarthur Agricultural Institute, Menangle, NSW, 2568, Australia.
| | - Daniel R Bogema
- NSW Department of Primary Industries, Elizabeth Macarthur Agricultural Institute, Menangle, NSW, 2568, Australia. .,The ithree institute, University of Technology, Sydney, Ultimo, NSW, 2007, Australia.
| |
Collapse
|
25
|
Hammer JF, Jenkins C, Bogema D, Emery D. Mechanical transfer of Theileria orientalis: possible roles of biting arthropods, colostrum and husbandry practices in disease transmission. Parasit Vectors 2016; 9:34. [PMID: 26793977 PMCID: PMC4722681 DOI: 10.1186/s13071-016-1323-x] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2015] [Accepted: 01/19/2016] [Indexed: 11/15/2022] Open
Abstract
Background The intracellular protozoal parasite Theileria orientalis has rapidly spread across South-eastern Australia, substantially impacting local cattle industries since 2006. Haemaphysalis longicornis appears to be a biological vector in the endemic regions. Mechanical transfer of blood by biting arthropods, in colostrum or iatrogenic transmission though husbandry procedures is another possible mode of transmission. This study assesses the risk of these mechanical modes of transmission. Methods Blood was collected from a T. orientalis Ikeda positive Angus steer, and was inoculated into the jugular vein of 9 calves in 3 treatment groups, each with 3 animals. Calves in Group 1 received 10 ml of cryopreserved blood, while those in Groups 2 and 3 received 1 ml (fresh blood) and 0.1 ml (cryopreserved), respectively. An additional three animals remained as negative controls and the donor calf was also followed as a positive control. Blood was collected over 3 months, and analysed via qPCR for the presence of the parasite. Samples of the sucking louse Linognathus vituli were collected opportunistically from calves 5 months after inoculation and tested for T. orientalis. For the colostral transmission study, 30 samples of blood and colostrum were collected from cows at calving in an endemic herd. These samples along with blood from their calves were tested by qPCR for T. orientalis and for antibodies to the major piroplasm surface protein (MPSP). Results Eight of the nine inoculated calves became positive for T. orientalis. The prepatent period of these infections was inversely correlated with inoculation dose. All negative control calves remained negative and the positive control calf remained positive. Samples of L. vituli tested positive for T. orientalis Ikeda, while some samples of colostrum were also shown to be qPCR and anti-MPSP positive. All calves in the colostral study tested qPCR negative although one was antibody-positive. Conclusions T. orientalis is capable of being mechanically transferred by intravenous inoculation with small volumes of blood and is detectable up to 5 months post-infection. Animals infected by this means may play a significant role in the transmission of the disease by acting as asymptomatic carriers. Other modes of blood transfer, including biting arthropods and colostral transfer are also possible modes of disease transmission.
Collapse
Affiliation(s)
| | - Cheryl Jenkins
- Elizabeth Macarthur Institute, New South Wales Department of Primary Industries, Menangle, NSW, Australia.
| | - Daniel Bogema
- The Ithree Institute, University of Technology Sydney, Broadway, NSW, Australia.
| | - David Emery
- Faculty of Veterinary Science, University of Sydney, Sydney, NSW, Australia.
| |
Collapse
|
26
|
Kakati P, Sarmah PC, Ray D, Bhattacharjee K, Sharma RK, Barkalita LM, Sarma DK, Baishya BC, Borah P, Stanley B. Emergence of oriental theileriosis in cattle and its transmission through Rhipicephalus (Boophilus) microplus in Assam, India. Vet World 2015; 8:1099-104. [PMID: 27047205 PMCID: PMC4774779 DOI: 10.14202/vetworld.2015.1099-1104] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2015] [Revised: 08/12/2015] [Accepted: 08/20/2015] [Indexed: 11/16/2022] Open
Abstract
Aim: The aim of the present study was to investigate the presence of Theileria in blood samples of crossbred and indigenous adult cows raised under unorganized small scale farming system in a Babesia and Anaplasma endemic geographical area from Assam, India and to see its transmission through Rhipicephalus (Boophilus) microplus ticks. Materials and Methods: For the present study, 57 clinical cases of cattle suspected to be of hemoparasitic infections were taken into consideration. The parasites were identified based on morphology in giemsa stained blood smear followed by polymerase chain reaction (PCR). Sera samples were tested for T. annulata antibodies in plate and Dot-ELISA. PCR was also conducted in eggs of Rhipicephalus (Boophilus) microplus tick collected from a Theileria orientalis positive animal. Results: PCR amplified 1124, 776, and 160 bp DNA fragments of B. bigemina (64.91%), T. orientalis (21.05%) and A. marginale (14.03%), respectively. This assay further conducted in 12 T. orientalis positive blood samples with primers of Buffeli, Chitose, and Ikeda variants of T. orientalis showed 3 samples positive to Ikeda type and none for Buffeli and Chitose. Babesia bovis and Theileria annulata specific primers also did not amplify any fragment during the PCR assay of the blood samples. Further, all sera samples tested negative to T. annulata antibodies in Plate and Dot-ELISA. PCR conducted in eggs of R (B).microplus tick collected from a T. orientalis positive animal revealed presence of the parasite DNA. Gradual improvement in physical condition leading to complete recovery in 10 out of 12 T. orientalis infected clinical cases treated with buparvaquone(at 2.5mg/kg.b.wt I/M) was the feedback obtained from field veterinarians and the cattle owners. Conclusion: The present investigation represents the first report of occurrence of T. orientalis in cattle of Assam with involvement of pathogenic Ikeda strain in clinical outbreaks and its possible natural transmission by R (B). microplus through the transovarian mode.
Collapse
Affiliation(s)
- Parikshit Kakati
- Department of Parasitology, College of Veterinary Science, Assam Agricultural University, Guwahati, Assam, India
| | - Prabhat Chandra Sarmah
- Department of Parasitology, College of Veterinary Science, Assam Agricultural University, Guwahati, Assam, India
| | - Debdatta Ray
- Division of Parasitology, Indian Veterinary Research Institute, Izatnagar, Uttar Pradesh, India
| | - Kanta Bhattacharjee
- Department of Parasitology, College of Veterinary Science, Assam Agricultural University, Guwahati, Assam, India
| | - Rajeev Kumar Sharma
- Department of Microbiology, College of Veterinary Science, Assam Agricultural University, Assam, India
| | - Luit Moni Barkalita
- Department of Animal Biotechnology, College of Veterinary Science, Assam Agricultural University, Assam, India
| | - Dipak Kumar Sarma
- Teaching Veterinary Clinical Complex, College of Veterinary Science, Assam Agricultural University, Assam, India
| | - Bhaben Chandra Baishya
- Teaching Veterinary Clinical Complex, College of Veterinary Science, Assam Agricultural University, Assam, India
| | - Pranjal Borah
- Goat Research Station, Burnihat, Assam Agricultural University, Assam, India
| | - Bobitha Stanley
- Division of Parasitology, Indian Veterinary Research Institute, Izatnagar, Uttar Pradesh, India
| |
Collapse
|
27
|
Bogema D, Fell S, O'Rourke B, Collins D, Eamens G, Jenkins C. Development and validation of an inexpensive and efficient method for the extraction of Theileria orientalis DNA from blood. Vet Parasitol 2015; 212:379-81. [DOI: 10.1016/j.vetpar.2015.08.014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Revised: 08/06/2015] [Accepted: 08/14/2015] [Indexed: 10/23/2022]
|
28
|
Hammer JF, Emery D, Bogema DR, Jenkins C. Detection of Theileria orientalis genotypes in Haemaphysalis longicornis ticks from southern Australia. Parasit Vectors 2015; 8:229. [PMID: 25889204 PMCID: PMC4404262 DOI: 10.1186/s13071-015-0839-9] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2015] [Accepted: 04/01/2015] [Indexed: 11/20/2022] Open
Abstract
Background Theileria are blood-borne intracellular protozoal parasites belonging to the phylum Apicomplexa. Previously considered a benign parasite in Australia, outbreaks of clinical disease resulting from Theileria orientalis genotypes have been reported in Australia since 2006. Since this time, outbreaks have become widespread in south-eastern Australia, resulting in significant adverse impacts on local dairy and beef industries. This paper provides the first investigation into the possible biological and mechanical vectors involved in the rapid spread of the parasite. Methods To identify possible vectors for disease, ticks, biting flies and mosquitoes were collected within active outbreak regions of Gippsland, Victoria. Ticks were collected from cattle and wildlife, and mosquitoes and biting flies were collected in traps in close proximity to outbreak herds. Ticks were identified via DNA barcoding of the mitochondrial cytochrome oxidase I gene. Barcoded ticks were pooled according to species or phylogenetic group and tested for the presence of T. orientalis and the genotypes Ikeda, Chitose and Buffeli using real-time PCR. Results DNA barcoding and phylogenetic analysis identified ticks from the following species: Haemaphysalis longicornis, Ixodes holocyclus, Ixodes cornuatus, Ixodes hirsti, and Bothriocroton concolor. Additional Haemaphysalis, Ixodes and Bothriocroton spp. were also identified. Of the ticks investigated, only H. longicornis ticks from cattle carried theilerial DNA, with the genotypes Ikeda, Chitose and Buffeli represented. Mosquitoes collected in close proximity to outbreak herds included; Aedes camptorhynchus, Aedes notoscriptus, Coquillettidia linealis, Culex australicus, and Culex molestus. Low levels of T. orientalis Buffeli genotype were detected in some mosquitoes. The haematophagous flies tested negative. Conclusions This is the first demonstration of a potential vector for T. orientalis in the current Australasian disease outbreak.
Collapse
Affiliation(s)
| | - David Emery
- Faculty of Veterinary Science, University of Sydney, Sydney, NSW, AUS.
| | - Daniel Ross Bogema
- The ithree institute, University of Technology Sydney, Broadway, Sydney, NSW, AUS. .,Elizabeth Macarthur Agricultural Institute, New South Wales Department of Primary Industries, Menangle, NSW, AUS.
| | - Cheryl Jenkins
- Elizabeth Macarthur Agricultural Institute, New South Wales Department of Primary Industries, Menangle, NSW, AUS.
| |
Collapse
|