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Venter A, Vorster I, Nkosi NF, Sibeko-Matjila KP, Bhoora RV. Molecular genotyping of Babesia caballi. Vet Parasitol 2024; 329:110214. [PMID: 38823187 DOI: 10.1016/j.vetpar.2024.110214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2024] [Revised: 05/20/2024] [Accepted: 05/21/2024] [Indexed: 06/03/2024]
Abstract
Babesia caballi is an intra-erythrocytic parasite causing equine piroplasmosis. Three B. caballi genotypes (A, B, and C) have been identified based on the 18 S rRNA and rhoptry-associated protein (rap-1) gene sequences. These variant parasite genotypes compromise the diagnostic utility of the WOAH-recommended serological assays in declaring horses free of equine piroplasmosis. Although a gene encoding a spherical body protein 4 (sbp4) has recently been identified as a potential antigen for the serological detection of B. caballi, the ability of this antigen to detect the different geographical strains has not been determined. The molecular distinction between variant B. caballi genotypes is limited and therefore we developed molecular typing assays for the rapid detection and quantification of distinct parasite genotypes. Field samples were screened for the presence of B. caballi using an established multiplex equine piroplasmosis qPCR assay. In this study, B. caballi genotype A was not detected in any field samples screened. However, phylogenetic analysis of the amplified sbp4 and 18 S rRNA genes confirmed the phylogenetic groupings of the South African isolates into either B. caballi genotypes B or C. A multiple sequence alignment of the sbp4 gene sequences obtained in this study together with the published sbp4 sequences representing B. caballi genotype A, were used to identify conserved regions within the gene to design three primer pairs and three genotype-specific TaqMan minor-groove binder (MGB™) probes. The qPCR assays were shown to be specific and efficient in the detection and differentiation between B. caballi genotypes A, B, and C and could be used as a diagnostic assay to prevent the unintentional spread of variant B. caballi genotypes globally.
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Affiliation(s)
- Alicia Venter
- Department of Veterinary Tropical Diseases, Faculty of Veterinary Science, University of Pretoria, Private Bag X04, Onderstepoort 0110, South Africa
| | - Ilse Vorster
- Department of Veterinary Tropical Diseases, Faculty of Veterinary Science, University of Pretoria, Private Bag X04, Onderstepoort 0110, South Africa
| | - Nokuzola Faith Nkosi
- Department of Veterinary Tropical Diseases, Faculty of Veterinary Science, University of Pretoria, Private Bag X04, Onderstepoort 0110, South Africa
| | - Kgomotso Penelope Sibeko-Matjila
- Department of Veterinary Tropical Diseases, Faculty of Veterinary Science, University of Pretoria, Private Bag X04, Onderstepoort 0110, South Africa
| | - Raksha Vasantrai Bhoora
- Department of Veterinary Tropical Diseases, Faculty of Veterinary Science, University of Pretoria, Private Bag X04, Onderstepoort 0110, South Africa.
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Sevinc F, Zhou M, Cao S, Ceylan O, Ulucesme MC, Ozubek S, Aktas M, Xuan X. Babesia ovis secreted antigen-1 is a diagnostic marker during the active Babesia ovis infections in sheep. Front Cell Infect Microbiol 2023; 13:1238369. [PMID: 37662014 PMCID: PMC10468981 DOI: 10.3389/fcimb.2023.1238369] [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: 06/11/2023] [Accepted: 07/24/2023] [Indexed: 09/05/2023] Open
Abstract
Ovine babesiosis caused by Babesia ovis is an economically significant disease. Recently, a few B. ovis-specific proteins, including recombinant B. ovis secreted antigen-1 (rBoSA1), have been identified. Immunological analyses revealed that rBoSA1 resides within the cytoplasm of infected erythrocytes and exhibits robust antigenic properties for detecting anti-B. ovis antibodies. This protein is released into the bloodstream during the parasite's development. It would be possible to diagnose active infections by detecting this secretory protein. For this purpose, a rBoSA1-specific polyclonal antibody-based sandwich ELISA was optimized in this study. Blood samples taken from the naturally (n: 100) and experimentally (n: 15) infected sheep were analyzed for the presence of native BoSA1. The results showed that native BoSA1 was detectable in 98% of naturally infected animals. There was a positive correlation between parasitemia level in microscopy and protein density in sandwich ELISA. Experimentally infected animals showed positive reactions from the first or second day of inoculations. However, experimental infections carried out by Rhipicephalus bursa ticks revealed the native BoSA1 was detectable from the 7th day of tick attachment when the parasite began to be seen microscopically. Sandwich ELISA was sensitive enough to detect rBoSA1 protein at a 1.52 ng/ml concentration. Additionally, no serological cross-reactivity was observed between animals infected with various piroplasm species, including Babesia bovis, B. bigemina, B. caballi, B. canis, B. gibsoni, Theileria equi, and T. annulata. Taken collectively, the findings show that the rBoSA1-specific polyclonal antibody-based sandwich ELISA can be successfully used to diagnose clinical B. ovis infections in sheep at the early stage.
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Affiliation(s)
- Ferda Sevinc
- Department of Parasitology, Faculty of Veterinary Medicine, University of Selcuk, Konya, Türkiye
| | - Mo Zhou
- Jiangsu Key Laboratory for High-tech Research and Development of Veterinary Biopharmaceuticals, Jiangsu Agri-animal Husbandry Vocational College, Taizhou, China
| | - Shinuo Cao
- Engineering Technology Research Center for Modern Animal Science and Novel Veterinary Pharmaceutic Development, Jiangsu Agri-animal Husbandry Vocational College, Taizhou, China
| | - Onur Ceylan
- Department of Parasitology, Faculty of Veterinary Medicine, University of Selcuk, Konya, Türkiye
| | - Mehmet Can Ulucesme
- Department of Parasitology, Faculty of Veterinary Medicine, University of Firat, Elazig, Türkiye
| | - Sezayi Ozubek
- Department of Parasitology, Faculty of Veterinary Medicine, University of Firat, Elazig, Türkiye
| | - Munir Aktas
- Department of Parasitology, Faculty of Veterinary Medicine, University of Firat, Elazig, Türkiye
| | - Xuenan Xuan
- National Research Center for Protozoan Diseases, Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Japan
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Capelli-Peixoto J, Saelao P, Johnson WC, Kappmeyer L, Reif KE, Masterson HE, Taus NS, Suarez CE, Brayton KA, Ueti MW. Comparison of high throughput RNA sequences between Babesia bigemina and Babesia bovis revealed consistent differential gene expression that is required for the Babesia life cycle in the vertebrate and invertebrate hosts. Front Cell Infect Microbiol 2022; 12:1093338. [PMID: 36601308 PMCID: PMC9806345 DOI: 10.3389/fcimb.2022.1093338] [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: 11/08/2022] [Accepted: 12/05/2022] [Indexed: 12/23/2022] Open
Abstract
Bovine babesiosis caused by Babesia bigemina and Babesia bovis is an economically important disease that affects cattle worldwide. Both B. bigemina and B. bovis are transovarially transmitted by Rhipicephalus ticks. However, little is known regarding parasite gene expression during infection of the tick vector or mammalian host, which has limited the development of effective control strategies to alleviate the losses to the cattle industry. To understand Babesia gene regulation during tick and mammalian host infection, we performed high throughput RNA-sequencing using samples collected from calves and Rhipicephalus microplus ticks infected with B. bigemina. We evaluated gene expression between B. bigemina blood-stages and kinetes and compared them with previous B. bovis RNA-seq data. The results revealed similar patterns of gene regulation between these two tick-borne transovarially transmitted Babesia parasites. Like B. bovis, the transcription of several B. bigemina genes in kinetes exceeded a 1,000-fold change while a few of these genes had a >20,000-fold increase. To identify genes that may have important roles in B. bigemina and B. bovis transovarial transmission, we searched for genes upregulated in B. bigemina kinetes in the genomic datasets of B. bovis and non-transovarially transmitted parasites, Theileria spp. and Babesia microti. Using this approach, we identify genes that may be potential markers for transovarial transmission by B. bigemina and B. bovis. The findings presented herein demonstrate common Babesia genes linked to infection of the vector or mammalian host and may contribute to elucidating strategies used by the parasite to complete their life cycle.
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Affiliation(s)
- Janaina Capelli-Peixoto
- Program in Vector-Borne Diseases, Department of Veterinary Microbiology and Pathology, College of Veterinary Medicine, Washington State University, Pullman, WA, United States,*Correspondence: Janaina Capelli-Peixoto,
| | - Perot Saelao
- Veterinary Pest Genetic Research Unit, USDA-ARS, Kerrville, TX, United States
| | | | - Lowell Kappmeyer
- Animal Disease Research Unit, USDA-ARS, Pullman, WA, United States
| | - Kathryn E. Reif
- Program in Vector-Borne Diseases, Department of Veterinary Microbiology and Pathology, College of Veterinary Medicine, Washington State University, Pullman, WA, United States
| | - Hayley E. Masterson
- Program in Vector-Borne Diseases, Department of Veterinary Microbiology and Pathology, College of Veterinary Medicine, Washington State University, Pullman, WA, United States
| | - Naomi S. Taus
- Program in Vector-Borne Diseases, Department of Veterinary Microbiology and Pathology, College of Veterinary Medicine, Washington State University, Pullman, WA, United States,Animal Disease Research Unit, USDA-ARS, Pullman, WA, United States
| | - Carlos E. Suarez
- Program in Vector-Borne Diseases, Department of Veterinary Microbiology and Pathology, College of Veterinary Medicine, Washington State University, Pullman, WA, United States,Animal Disease Research Unit, USDA-ARS, Pullman, WA, United States
| | - Kelly A. Brayton
- Program in Vector-Borne Diseases, Department of Veterinary Microbiology and Pathology, College of Veterinary Medicine, Washington State University, Pullman, WA, United States
| | - Massaro W. Ueti
- Program in Vector-Borne Diseases, Department of Veterinary Microbiology and Pathology, College of Veterinary Medicine, Washington State University, Pullman, WA, United States,Animal Disease Research Unit, USDA-ARS, Pullman, WA, United States
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4
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The GP-45 Protein, a Highly Variable Antigen from Babesia bigemina, Contains Conserved B-Cell Epitopes in Geographically Distant Isolates. Pathogens 2022; 11:pathogens11050591. [PMID: 35631112 PMCID: PMC9144247 DOI: 10.3390/pathogens11050591] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Revised: 05/06/2022] [Accepted: 05/08/2022] [Indexed: 01/25/2023] Open
Abstract
In B. bigemina, the 45 kilodaltons glycoprotein (GP-45) is the most studied. GP-45 is exposed on the surface of the B. bigemina merozoite, it is believed to play a role in the invasion of erythrocytes, and it is characterized by a high genetic and antigenic polymorphism. The objective of this study was to determine if GP-45 contains conserved B-cell epitopes, and if they would induce neutralizing antibodies. The comparative analysis of nucleotide and amino acids sequences revealed a high percentage of similarity between field isolates. Antibodies against peptides containing conserved B-cell epitopes of GP-45 were generated. Antibodies present in the sera of mice immunized with GP-45 peptides specifically recognize B. bigemina by the IFAT. More than 95% of cattle naturally infected with B. bigemina contained antibodies against conserved GP-45 peptides tested by ELISA. Finally, sera from rabbits immunized with GP-45 peptides were evaluated in vitro neutralization tests and it was shown that they reduced the percentage of parasitemia compared to sera from rabbits immunized with adjuvant. GP-45 from geographically distant isolates of B. bigemina contains conserved B-cell epitopes that induce neutralizing antibodies suggesting that this gene and its product play a critical role in the survival of the parasite under field conditions.
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Ueti MW, Johnson WC, Kappmeyer LS, Herndon DR, Mousel MR, Reif KE, Taus NS, Ifeonu OO, Silva JC, Suarez CE, Brayton KA. Transcriptome dataset of Babesia bovis life stages within vertebrate and invertebrate hosts. Data Brief 2020; 33:106533. [PMID: 33294524 PMCID: PMC7701181 DOI: 10.1016/j.dib.2020.106533] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Revised: 11/09/2020] [Accepted: 11/10/2020] [Indexed: 11/28/2022] Open
Abstract
Babesia bovis is a hemoprotozoan parasite of cattle that has a complex life cycle within vertebrate and invertebrate hosts. In the mammalian host, B. bovis undergoes asexual reproduction while in the tick midgut, gametes are induced, fuse, and form zygotes. The zygote infects tick gut epithelial cells and transform into kinetes that are released into the hemolymph and invade other tick tissues such as the ovaries, resulting in transovarial transmission to tick offspring. To compare gene regulation between different B. bovis life stages, we collected parasites infecting bovine erythrocytes and tick hemolymph. Total RNA samples were isolated, and multiplexed libraries sequenced using paired-end 100 cycle reads of a HiSeq 2500. The data was normalized using the TMM method and analysed for significant differential expression using the generalized linear model likelihood ratio test (GLM LRT) in edgeR. To validate our datasets, ten genes were selected using NormFinder. Genes that had no significant fold change between the blood and tick stages in the RNA-Seq datasets were tested by quantitative PCR to determine their suitability as “housekeeping” genes. The normalized RNA-Seq data revealed genes upregulated during infection of the mammalian host or tick vector and six upregulated genes were validated by quantitative PCR. These datasets can help identify useful targets for controlling bovine babesiosis.
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Affiliation(s)
- Massaro W. Ueti
- Animal Disease Research Unit, USDA-ARS, Pullman, WA, United States
- Program in Vector-borne Disease, Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, WA, United States
- Paul G. Allen School for Global Animal Health, Washington State University, Pullman, WA, United States
- Corresponding author at: Animal Diseases Research Unit, USDA-ARS, Pullman, WA 99164-6630, United States.
| | | | | | - David R. Herndon
- Animal Disease Research Unit, USDA-ARS, Pullman, WA, United States
| | - Michelle R. Mousel
- Animal Disease Research Unit, USDA-ARS, Pullman, WA, United States
- Paul G. Allen School for Global Animal Health, Washington State University, Pullman, WA, United States
| | - Kathryn E. Reif
- Animal Disease Research Unit, USDA-ARS, Pullman, WA, United States
- Program in Vector-borne Disease, Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, WA, United States
| | - Naomi S. Taus
- Animal Disease Research Unit, USDA-ARS, Pullman, WA, United States
- Program in Vector-borne Disease, Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, WA, United States
| | - Olukemi O. Ifeonu
- Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, MD, United States
| | - Joana C. Silva
- Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, MD, United States
- Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, MD, United States
| | - Carlos E. Suarez
- Animal Disease Research Unit, USDA-ARS, Pullman, WA, United States
- Program in Vector-borne Disease, Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, WA, United States
| | - Kelly A. Brayton
- Program in Vector-borne Disease, Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, WA, United States
- Paul G. Allen School for Global Animal Health, Washington State University, Pullman, WA, United States
- Corresponding author at: Program in Vector-borne Disease, Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, WA 99164-7040, United States.
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6
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Ueti MW, Johnson WC, Kappmeyer LS, Herndon DR, Mousel MR, Reif KE, Taus NS, Ifeonu OO, Silva JC, Suarez CE, Brayton KA. Comparative analysis of gene expression between Babesia bovis blood stages and kinetes allowed by improved genome annotation. Int J Parasitol 2020; 51:123-136. [PMID: 33069745 DOI: 10.1016/j.ijpara.2020.08.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Revised: 07/29/2020] [Accepted: 08/04/2020] [Indexed: 12/23/2022]
Abstract
Throughout their life cycle, Babesia parasites alternate between a mammalian host, where they cause babesiosis, and the tick vector. Transition between hosts results in distinct environmental signals that influence patterns of gene expression, consistent with the morphological and functional changes operating in the parasites during their life stages. In addition, comparing differential patterns of gene expression among mammalian and tick parasite stages can provide clues for developing improved methods of control. Hereby, we upgraded the genome assembly of Babesia bovis, a bovine hemoparasite, closing a 139 kbp gap, and used RNA-Seq datasets derived from mammalian blood and tick kinete stages to update the genome annotation. Of the originally annotated genes, 1,254 required structural changes, and 326 new genes were identified, leading to a different predicted proteome compared to the original annotation. Next, the RNA-Seq data was used to identify B. bovis genes that were differentially expressed in the vertebrate and arthropod hosts. In blood stages, 28% of the genes were upregulated up to 300 fold, whereas 26% of the genes in kinetes, a tick stage, were upregulated up to >19,000 fold. We thus discovered differentially expressed genes that may play key biological roles and serve as suitable targets for the development of vaccines to control bovine babesiosis.
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Affiliation(s)
- Massaro W Ueti
- Animal Diseases Research Unit, USDA-ARS, Pullman, Washington, USA; Program in Vector-borne Diseases, Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, Washington, USA; Paul G. Allen School for Global Animal Health, Washington State University, Pullman, Washington, USA.
| | | | | | - David R Herndon
- Animal Diseases Research Unit, USDA-ARS, Pullman, Washington, USA
| | - Michelle R Mousel
- Animal Diseases Research Unit, USDA-ARS, Pullman, Washington, USA; Paul G. Allen School for Global Animal Health, Washington State University, Pullman, Washington, USA
| | - Kathryn E Reif
- Animal Diseases Research Unit, USDA-ARS, Pullman, Washington, USA; Program in Vector-borne Diseases, Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, Washington, USA
| | - Naomi S Taus
- Animal Diseases Research Unit, USDA-ARS, Pullman, Washington, USA; Program in Vector-borne Diseases, Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, Washington, USA
| | - Olukemi O Ifeonu
- Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Joana C Silva
- Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, Maryland, USA; Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Carlos E Suarez
- Animal Diseases Research Unit, USDA-ARS, Pullman, Washington, USA; Program in Vector-borne Diseases, Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, Washington, USA
| | - Kelly A Brayton
- Program in Vector-borne Diseases, Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, Washington, USA; Paul G. Allen School for Global Animal Health, Washington State University, Pullman, Washington, USA.
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Mahmoud MS, Kandil OM, Abu El-Ezz NT, Hendawy SHM, Elsawy BSM, Knowles DP, Bastos RG, Kappmeyer LS, Laughery JM, Alzan HF, Suarez CE. Identification and antigenicity of the Babesia caballi spherical body protein 4 (SBP4). Parasit Vectors 2020; 13:369. [PMID: 32698835 PMCID: PMC7376649 DOI: 10.1186/s13071-020-04241-9] [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: 03/10/2020] [Accepted: 07/15/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The tick-borne intra-erythrocytic apicomplexan Babesia caballi is one of the etiological agents of equine babesiosis, an economically important disease of equids in most tropical and subtropical areas of the world. Discovering candidate antigens for improved diagnostic tools and vaccines remains needed for controlling equine babesiosis. This study describes the B. caballi sbp4 (Bcsbp4) gene and protein (BcSBP4) and analyzes its antigenicity in infected equids. METHODS BLAST searches of an uncurated B. caballi assembly genome using the B. bovis SBP4 as a query were carried out, followed by PCR amplification and sequencing of a newly identified BcSBP4. Characterization of this novel gene and protein was performed by bioinformatics analysis, western blots, immunofluorescence (IFA) and an in vitro neutralization test using anti SBP4 peptide antibodies. Antigenicity of recombinant BcSBP4 (rBcSBP4) was tested with sera from field animals (n = 18) using an indirect ELISA (iELISA). RESULTS Babesia caballi genome searches using B. bovis SBP4 as a query allowed identification of a novel gene termed Bcsbp4. The Bcsbp4 gene encodes for a protein of 30.58 kDa, which is fully conserved among B. caballi isolates from USA and Egypt. Bioinformatics analysis indicates that BcSBP4 contains a signal peptide and lacks additional transmembrane domains. Expression of BcSBP4 in blood stages of B. caballi was confirmed by western blot and IFA using antibodies against synthetic peptides representing putative B-cell epitopes of BcSBP4 predicted by in silico analysis. In vitro neutralization tests using anti-BcSBP4 peptide antibodies showed a marginal, but statistically significant inhibitory effect on the infectivity of B. caballi merozoites in horse red blood cells. Sera from eight B. caballi-infected equids, but none out of ten negative equid control sera, gave a positive signal in an rBcSBP4 based iELISA. CONCLUSIONS The Bcsbp4 gene is expressed in B. caballi blood stages. The BcSBP4 protein is a potential candidate for developing a novel serological test that could detect B. caballi infection in equids in tropical and subtropical countries worldwide.
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Affiliation(s)
- Mona S Mahmoud
- Parasitology and Animal Diseases Department, National Research Center, Dokki, Giza, Egypt
| | - Omnia M Kandil
- Parasitology and Animal Diseases Department, National Research Center, Dokki, Giza, Egypt
| | - Nadia T Abu El-Ezz
- Parasitology and Animal Diseases Department, National Research Center, Dokki, Giza, Egypt
| | - Seham H M Hendawy
- Parasitology and Animal Diseases Department, National Research Center, Dokki, Giza, Egypt
| | - Bassma S M Elsawy
- Parasitology and Animal Diseases Department, National Research Center, Dokki, Giza, Egypt
| | - Donald P Knowles
- Department of Veterinary Microbiology and Pathology, College of Veterinary Medicine, Washington State University, Pullman, WA, USA
| | - Reginaldo G Bastos
- Department of Veterinary Microbiology and Pathology, College of Veterinary Medicine, Washington State University, Pullman, WA, USA
| | - Lowell S Kappmeyer
- Animal Disease Research Unit, United States Department of Agricultural-Agricultural Research Service, Pullman, WA, USA
| | - Jacob M Laughery
- Department of Veterinary Microbiology and Pathology, College of Veterinary Medicine, Washington State University, Pullman, WA, USA
| | - Heba F Alzan
- Parasitology and Animal Diseases Department, National Research Center, Dokki, Giza, Egypt. .,Department of Veterinary Microbiology and Pathology, College of Veterinary Medicine, Washington State University, Pullman, WA, USA.
| | - Carlos E Suarez
- Department of Veterinary Microbiology and Pathology, College of Veterinary Medicine, Washington State University, Pullman, WA, USA.,Animal Disease Research Unit, United States Department of Agricultural-Agricultural Research Service, Pullman, WA, USA
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SIVAKUMAR T, LAN DTB, LONG PT, VIET LQ, WEERASOORIYA G, KUME A, SUGANUMA K, IGARASHI I, YOKOYAMA N. Serological and molecular surveys of Babesia bovis and Babesia bigemina among native cattle and cattle imported from Thailand in Hue, Vietnam. J Vet Med Sci 2018; 80:333-336. [PMID: 29249730 PMCID: PMC5836773 DOI: 10.1292/jvms.17-0549] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Accepted: 11/26/2017] [Indexed: 01/15/2023] Open
Abstract
Serum and DNA from blood samples collected from Vietnamese yellow cattle (n=101) and cattle imported from Thailand (n=54) at a Vietnamese slaughter house were screened for Babesia bovis and Babesia bigemina infections by enzyme-linked immunosorbent assay (ELISA) and PCR. The positive rates determined by ELISA (B. bovis and B. bigemina) or PCR (B. bigemina) in the Vietnamese cattle were significantly higher than those found in Thai cattle. Some PCR-positive Vietnamese animals were ELISA-negative, whereas all PCR-positive Thai cattle were ELISA-positive, suggesting that the animals were infected in Thailand. Importing Babesia-infected cattle may lead to the introduction of new parasite strains, possibly compromising the development of anti-Babesia immune control strategies in Vietnam.
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Affiliation(s)
- Thillaiampalam SIVAKUMAR
- National Research Center for Protozoan Diseases, Obihiro
University of Agriculture and Veterinary Medicine, Inada-cho, Obihiro, Hokkaido 080-8555,
Japan
| | - Dinh Thi Bich LAN
- Hue University Institute of Biotechnology, Phu Thuong
Commune, Phu Vang District, Thua Thien Hue Province 47000, Vietnam
| | - Phung Thang LONG
- University of Agriculture and Forestry, Hue University, 102
Phung Hung Street, Hue 47000, Vietnam
| | - Le Quoc VIET
- Hue University Institute of Biotechnology, Phu Thuong
Commune, Phu Vang District, Thua Thien Hue Province 47000, Vietnam
| | - Gayani WEERASOORIYA
- National Research Center for Protozoan Diseases, Obihiro
University of Agriculture and Veterinary Medicine, Inada-cho, Obihiro, Hokkaido 080-8555,
Japan
- Veterinary Research Institute, P.O. Box 28, Peradeniya, Sri
Lanka
| | - Aiko KUME
- National Research Center for Protozoan Diseases, Obihiro
University of Agriculture and Veterinary Medicine, Inada-cho, Obihiro, Hokkaido 080-8555,
Japan
| | - Keisuke SUGANUMA
- National Research Center for Protozoan Diseases, Obihiro
University of Agriculture and Veterinary Medicine, Inada-cho, Obihiro, Hokkaido 080-8555,
Japan
- Research Center for Global Agromedicine, Obihiro University
of Agriculture and Veterinary Medicine, Inada, Obihiro, Hokkaido 080-8555, Japan
| | - Ikuo IGARASHI
- National Research Center for Protozoan Diseases, Obihiro
University of Agriculture and Veterinary Medicine, Inada-cho, Obihiro, Hokkaido 080-8555,
Japan
| | - Naoaki YOKOYAMA
- National Research Center for Protozoan Diseases, Obihiro
University of Agriculture and Veterinary Medicine, Inada-cho, Obihiro, Hokkaido 080-8555,
Japan
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