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Shock BC, Jones HH, Garrett KB, Hernandez SM, Burchfield HJ, Haman K, Schwantje H, Telford SR, Cunningham MW, Yabsley MJ. Description of B abesia coryicola sp. nov. from Florida pumas ( Puma concolor coryi) from southern Florida, USA. Int J Parasitol Parasites Wildl 2024; 24:100963. [PMID: 39169986 PMCID: PMC11337720 DOI: 10.1016/j.ijppaw.2024.100963] [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: 05/31/2024] [Revised: 07/03/2024] [Accepted: 07/05/2024] [Indexed: 08/23/2024]
Abstract
Previously, a high prevalence of piroplasms has been reported from Florida pumas (Puma concolor coryi) from southern Florida. In the current study, we describe the biological characteristics of a novel Babesia species in Florida pumas. Ring-stage trophozoites were morphologically similar to trophozoites of numerous small babesids of felids including B. leo, B. felis, and Cytauxzoon felis. Parasitemias in Florida pumas were very low (<1%) and hematologic values of 25 Babesia-infected Florida pumas were within normal ranges for P. concolor. Phylogenetic analysis of near full-length 18S rRNA gene, β-tubulin, cytochrome c oxidase subunit I, cytochrome c oxidase subunit III, and cytochrome b gene sequences indicated that this Babesia species is a member of the Babesia sensu stricto clade and is related to groups of Babesia spp. from carnivores or ungulates, although the closest group varied by gene target. Internal transcribed spacer (ITS)-1 region sequences from this Babesia sp. from 19 Florida pumas were 85.7-99.5% similar to each other and ∼88% similar to B. odocoilei. Similarly, an ITS-2 sequence from one puma was 96% similar to B. bigemina and 92% similar to a Babesia sp. from a red panda (Ailurus fulgens). Infected pumas were positive for antibodies that reacted with B. odocoilei, B. canis, and B. bovis antigens with titers of 1:256, 1:128, and 1:128, respectively. No serologic reactivity was noted for Theileria equi. No molecular evidence of congenital infection was detected in 24 kittens born to 11 Babesia-infected female pumas. Pumas from other populations in the United States [Louisiana (n = 1), North Dakota (n = 5) and Texas (n = 28)], British Columbia, Canada (n = 9), and Costa Rica (n = 2) were negative for this Babesia sp. Collectively, these data provide morphologic, serologic, genetic, and natural history data for this novel Babesia sp. which we propose the name Babesia coryicola sp. nov. sp. This is the first description of a felid-associated Babesia species in North America.
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Affiliation(s)
- Barbara C. Shock
- Warnell School of Forestry and Natural Resources, University of Georgia, Athens, GA, 30602, USA
- Southeastern Cooperative Wildlife Disease Study, Department of Population Health, College of Veterinary Medicine, University of Georgia, Athens, GA, 30602, USA
| | - Håkon H. Jones
- Southeastern Cooperative Wildlife Disease Study, Department of Population Health, College of Veterinary Medicine, University of Georgia, Athens, GA, 30602, USA
| | - Kayla B. Garrett
- Warnell School of Forestry and Natural Resources, University of Georgia, Athens, GA, 30602, USA
- Southeastern Cooperative Wildlife Disease Study, Department of Population Health, College of Veterinary Medicine, University of Georgia, Athens, GA, 30602, USA
| | - Sonia M. Hernandez
- Warnell School of Forestry and Natural Resources, University of Georgia, Athens, GA, 30602, USA
- Southeastern Cooperative Wildlife Disease Study, Department of Population Health, College of Veterinary Medicine, University of Georgia, Athens, GA, 30602, USA
| | - Holly J. Burchfield
- Southeastern Cooperative Wildlife Disease Study, Department of Population Health, College of Veterinary Medicine, University of Georgia, Athens, GA, 30602, USA
| | - Katie Haman
- Wildlife Program, Washington Department of Fish and Wildlife, 1111 Washington Street SE, Olympia, WA, 98504, USA
| | - Helen Schwantje
- British Columbia Ministry of Forests, Lands and Natural Resource Operations, Nanaimo, British Columbia, Canada
| | - Sam R. Telford
- Tufts University Cummings School of Veterinary Medicine, North Grafton, MA, USA
| | - Mark W. Cunningham
- Florida Fish and Wildlife Conservation Commission, Gainesville, FL, 32601, USA
| | - Michael J. Yabsley
- Warnell School of Forestry and Natural Resources, University of Georgia, Athens, GA, 30602, USA
- Southeastern Cooperative Wildlife Disease Study, Department of Population Health, College of Veterinary Medicine, University of Georgia, Athens, GA, 30602, USA
- Center for Ecology of Infectious Diseases, University of Georgia, Athens, GA, 30602, USA
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Liu Y, Niu J, Cui J, Rao H, Yu J. Prevalence and molecular detection of Babesia microti in rodents in Southeastern Shanxi, China. PLoS One 2024; 19:e0306181. [PMID: 38959227 PMCID: PMC11221649 DOI: 10.1371/journal.pone.0306181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2024] [Accepted: 06/12/2024] [Indexed: 07/05/2024] Open
Abstract
Babesia is a tick-transmitted parasite that infects wild and domestic animals, causes babesiosis in humans, and is an increasing public health concern. Here, we investigated the prevalence and molecular characteristics of Babesia infections in the rodents in Southeastern Shanxi, China. Small rodents were captured, and the liver and spleen tissues were used for Babesia detection using traditional PCR and sequencing of the partial 18S rRNA gene. The analysis revealed that 27 of 252 small rodents were positive for Babesia, with an infection rate of 10.71%. The infection rates in different sexes and rodent tissues were not statistically different, but those in different rodent species, habitats, and sampling sites were statistically different. The highest risk of Babesia infection was observed in Niviventer confucianus captured from the forests in Huguan County. Forty-three sequences from 27 small rodents positive for Babesia infection were identified as Babesia microti, including 42 sequences from 26 N. confucianus, and one sequence from Apodemus agrarius. Phylogenetic analysis showed that all sequences were clustered together and had the closest genetic relationship with Babesia microti strains isolated from Rattus losea and N. confucianus in China, and belonged to the Kobe-type, which is pathogenic to humans. Compared to other Kobe-type strains based on the nearly complete 18S rRNA gene, the sequences obtained in this study showed the difference by 1-3 bp. Overall, a high prevalence of Babesia microti infection was observed in small rodents in Southeastern Shanxi, China, which could benefit us to take the implementation of relevant prevention and control measures in this area.
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Affiliation(s)
- Yiping Liu
- Department of Basic Medical Sciences, Changzhi Medical College, Changzhi, China
| | - Jingrong Niu
- Department of Basic Medical Sciences, Changzhi Medical College, Changzhi, China
| | - Jia Cui
- Department of Basic Medical Sciences, Changzhi Medical College, Changzhi, China
| | - Huaxiang Rao
- Department of Public Health and Preventive Medicine, Changzhi Medical College, Changzhi, China
| | - Juan Yu
- Department of Basic Medical Sciences, Changzhi Medical College, Changzhi, China
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Kim HJ, Han B, Lee HI, Ju JW, Shin HI. Current Status of Trypanosoma grosi and Babesia microti in Small Mammals in the Republic of Korea. Animals (Basel) 2024; 14:989. [PMID: 38612228 PMCID: PMC11010837 DOI: 10.3390/ani14070989] [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: 02/04/2024] [Revised: 03/13/2024] [Accepted: 03/21/2024] [Indexed: 04/14/2024] Open
Abstract
Small mammals, such as rodents and shrews, are natural reservoir hosts of zoonotic diseases, including parasitic protozoa. To assess the risk of rodent-borne parasitic protozoa in the Republic of Korea (ROK), this study investigated the status of parasitic protozoa, namely Trypanosoma, Babesia, and Theileria, in small mammals. In total, 331 blood samples from small mammals were analyzed for parasites using PCR and sequenced. Samples were positive for Trypanosoma grosi (23.9%; n = 79) and Babesia microti (10%; n = 33) but not Theileria. Small mammals from Seogwipo-si showed the highest infection rate of T. grosi (48.4%), while the highest B. microti infection rate was observed in those from Gangneung-si (25.6%). Sequence data revealed T. grosi to be of the AKHA strain. Phylogenetic analysis of B. microti revealed the US and Kobe genotypes. B. microti US-type-infected small mammals were detected throughout the country, but the Kobe type was only detected in Seogwipo-si. To our knowledge, this is the first nationwide survey that confirmed T. grosi and B. microti infections at the species level in small mammals in the ROK and identified the Kobe type of B. microti. These results provide valuable information for further molecular epidemiological studies on these parasites.
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Affiliation(s)
| | | | | | | | - Hyun-Il Shin
- Division of Vectors and Parasitic Diseases, Korea Disease Control and Prevention Agency, 187 Osongsaenmyeong 2-ro, Osong-eup, Heungdeok-gu, Cheongju 28159, Republic of Korea; (H.J.K.); (B.H.); (H.-I.L.); (J.-W.J.)
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Zamoto-Niikura A, Saigo A, Sato M, Kobayashi H, Sasaki M, Nakao M, Suzuki T, Morikawa S. The presence of Ixodes pavlovskyi and I. pavlovskyi-borne microorganisms in Rishiri Island: an ecological survey. mSphere 2023; 8:e0021323. [PMID: 37930050 PMCID: PMC10871164 DOI: 10.1128/msphere.00213-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Accepted: 09/25/2023] [Indexed: 11/07/2023] Open
Abstract
IMPORTANCE Understanding the ecology of ticks and tick-borne microorganisms is important to assess the risk of emerging tick-borne diseases. Despite the fact that the Ixodes pavlovskyi tick bites humans, we lack information including population genetics and the reason for the inadequate distribution in Japan. A 5-year survey revealed that Rishiri Island, the main stopover in the East Asian Flyway of wild birds in the northern Sea of Japan, was a refuge of I. pavlovskyi. The I. pavlovskyi included two haplogroups, which were supposed to diverge a long time before the island separated from the continent and Hokkaido mainland. The detection of microorganisms from wildlife revealed that wild birds and rodents play a role in diffusion and settlement, respectively, of not only I. pavlovskyi but also I. pavlovskyi-borne microorganisms including Candidatus Ehrlichia khabarensis and Babesia microti US lineage. Various island-specific factors control I. pavlovskyi dominance and tick-borne pathogen maintenance. The results may enable us to explain how tick-borne infectious microorganisms are transported.
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Affiliation(s)
- Aya Zamoto-Niikura
- Management Department of Biosafety, Laboratory Animal and Pathogen Bank, National Institute of Infectious Diseases, Tokyo, Japan
| | - Akiko Saigo
- Management Department of Biosafety, Laboratory Animal and Pathogen Bank, National Institute of Infectious Diseases, Tokyo, Japan
| | | | - Hirotaka Kobayashi
- Department of Pathology, National Institute of Infectious Diseases, Tokyo, Japan
| | | | | | - Tadaki Suzuki
- Department of Pathology, National Institute of Infectious Diseases, Tokyo, Japan
| | - Shigeru Morikawa
- Department of Veterinary Medicine, Okayama University of Science, Okayama, Japan
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Calchi AC, Yogui DR, Alves MH, Desbiez ALJ, Kluyber D, Vultão JG, Arantes PVC, de Santi M, Werther K, Teixeira MMG, Machado RZ, André MR. Molecular detection of piroplasmids in mammals from the Superorder Xenarthra in Brazil. Parasitol Res 2023; 122:3169-3180. [PMID: 37848747 DOI: 10.1007/s00436-023-08008-w] [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: 05/21/2023] [Accepted: 10/10/2023] [Indexed: 10/19/2023]
Abstract
Xenarthra mammals can be found from southern North America to southern South America, including all Brazilian biomes. Although it has been shown that Xenarthra mammals can play a role as reservoirs for several zoonotic agents, few studies investigate the diversity of piroplasmids (Apicomplexa: Piroplasmida) in this group of mammals. Taking into account that piroplasmids can cause disease in animals and humans, understanding the prevalence and diversity of piroplasmids in Xenarthra mammals would contribute to conservation efforts for this group of animals as well as to infer risk areas for transmission of emergent zoonosis. The present study aimed to investigate the occurrence and molecular identity of piroplasmids in free-living mammals of the Superorder Xenarthra from four Brazilian states (Mato Grosso do Sul, São Paulo, Rondônia, and Pará). For this, DNA was extracted from blood or spleen samples from 455 animals. A nested PCR based on the 18S rRNA gene was used as screening for piroplasmids. Of the 455 samples analyzed, 25 (5.5%) were positive. Additionally, PCR assays based on 18S rRNA near-complete, cox-1, cox-3, hsp70, cytB, β-tubulin genes and the ITS-1 intergenic region were performed. Five out of 25 positive samples also tested positive for ITS-1-based PCR. The phylogenetic analysis positioned three 18S rRNA sequences detected in Priodontes maximus into the same clade of Babesia sp. detected in marsupials (Didelphis albiventris, Didelphis marsupialis, and Monodelphis domestica) and Amblyomma dubitatum collected from opossums and coatis in Brazil. On the other hand, the 18S rRNA sequence obtained from Dasypus novemcinctus was closely related to a Theileria sp. sequence previously detected in armadillos from Mato Grosso State, grouping in a subclade within the Theileria sensu stricto clade. In the phylogenetic analysis based on the ITS-1 region, the sequences obtained from Myrmecophaga tridactyla and Tamandua tetradactyla were placed into a single clade, apart from the other piroplasmid clades. The present study demonstrated the molecular occurrence of Piroplasmida in anteaters and Babesia sp. and Theileria sp. in armadillos from Brazil.
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Affiliation(s)
- Ana Cláudia Calchi
- Vector-Borne Bioagents Laboratory (VBBL), Department of Pathology, Reproduction and One Health, School of Agricultural and Veterinarian Sciences (FCAV), São Paulo State University (UNESP), Campus de Jaboticabal, Via de Acesso Prof. Paulo Donato Castellane, s/n, Zona Rural, CEP, Jaboticabal, SP, 14884-900, Brazil
| | - Débora Regina Yogui
- ICAS - Instituto de Conservação de Animais Silvestres - Projeto Bandeiras e Rodovias, Campo Grande, Mato Grosso do Sul, MS, Brazil
- Nashville Zoo at Grassmere, Nashville, TN, USA
| | - Mario Henrique Alves
- ICAS - Instituto de Conservação de Animais Silvestres - Projeto Bandeiras e Rodovias, Campo Grande, Mato Grosso do Sul, MS, Brazil
- Postgraduate Program in Ecology and Conservation (PPGEC), Federal University of Mato Grosso do Sul, Campo Grande, Mato Grosso do Sul, 79070-900, Brazil
| | - Arnaud Leonard Jean Desbiez
- ICAS - Instituto de Conservação de Animais Silvestres - Projeto Bandeiras e Rodovias, Campo Grande, Mato Grosso do Sul, MS, Brazil
- RZSS - The Royal Zoological Society of Scotland, Murrayfield, Edinburgh, EH12, UK
| | - Danilo Kluyber
- ICAS - Instituto de Conservação de Animais Silvestres - Projeto Bandeiras e Rodovias, Campo Grande, Mato Grosso do Sul, MS, Brazil
- Naples Zoo at the Caribbean Gardens, Naples, FL, USA
| | | | - Paulo Vitor Cadina Arantes
- Vector-Borne Bioagents Laboratory (VBBL), Department of Pathology, Reproduction and One Health, School of Agricultural and Veterinarian Sciences (FCAV), São Paulo State University (UNESP), Campus de Jaboticabal, Via de Acesso Prof. Paulo Donato Castellane, s/n, Zona Rural, CEP, Jaboticabal, SP, 14884-900, Brazil
| | - Mariele de Santi
- Vector-Borne Bioagents Laboratory (VBBL), Department of Pathology, Reproduction and One Health, School of Agricultural and Veterinarian Sciences (FCAV), São Paulo State University (UNESP), Campus de Jaboticabal, Via de Acesso Prof. Paulo Donato Castellane, s/n, Zona Rural, CEP, Jaboticabal, SP, 14884-900, Brazil
| | - Karin Werther
- Wildlife Pathology Service, Department of Pathology, Reproduction and One Health, School of Agricultural and Veterinarian Sciences (FCAV), São Paulo State University (UNESP), Jaboticabal, SP, Brazil
| | | | - Rosangela Zacarias Machado
- Vector-Borne Bioagents Laboratory (VBBL), Department of Pathology, Reproduction and One Health, School of Agricultural and Veterinarian Sciences (FCAV), São Paulo State University (UNESP), Campus de Jaboticabal, Via de Acesso Prof. Paulo Donato Castellane, s/n, Zona Rural, CEP, Jaboticabal, SP, 14884-900, Brazil
| | - Marcos Rogério André
- Vector-Borne Bioagents Laboratory (VBBL), Department of Pathology, Reproduction and One Health, School of Agricultural and Veterinarian Sciences (FCAV), São Paulo State University (UNESP), Campus de Jaboticabal, Via de Acesso Prof. Paulo Donato Castellane, s/n, Zona Rural, CEP, Jaboticabal, SP, 14884-900, Brazil.
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Molecular detection of Babesia spp. and Rickettsia spp. in coatis (Nasua nasua) and associated ticks from midwestern Brazil. Parasitol Res 2023; 122:1151-1158. [PMID: 36890298 DOI: 10.1007/s00436-023-07815-5] [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: 01/29/2023] [Accepted: 03/02/2023] [Indexed: 03/10/2023]
Abstract
Procyonids are reservoirs of many zoonotic infectious diseases, including tick-borne pathogens. The role of coatis (Nasua nasua) in the epidemiology of piroplasmids and Rickettsia has not been fully addressed in Brazil. To molecularly study these agents in coatis and associated ticks, animals were sampled in two urban areas in Midwestern Brazil. Blood (n = 163) and tick (n = 248) DNA samples were screened by PCR assays targeting the 18S rRNA and gltA genes of piroplasmids and Rickettsia spp., respectively. Positive samples were further molecularly tested targeting cox-1, cox-3, β-tubulin, cytB, and hsp70 (piroplasmid) and ompA, ompB, and htrA 17-kDa (Rickettsia spp.) genes, sequenced and phylogenetically analyzed. All coatis' blood samples were negative for piroplasmids, whereas five pools of ticks (2%) were positive for two different sequences of Babesia spp.. The first from Amblyomma sculptum nymphs was close (i.e., ≥ 99% nucleotide identity) to a Babesia sp. previously found in capybaras (Hydrochoerus hydrochaeris); the second from Amblyomma dubitatum nymphs and Amblyomma spp. larvae was identical (100% nucleotide identity) to a Babesia sp. detected in opossums (Didelphis albiventris) and associated ticks. Four samples (0.8%) were positive by PCR to two different Rickettsia spp. sequences, being the first from Amblyomma sp. larva identical to Rickettsia belli and the second from A. dubitatum nymph identical to Rickettsia species from Spotted Fever Group (SFG). The detection of piroplasmids and SFG Rickettsia sp. highlights the importance of Amblyomma spp. in the maintenance of tick-borne agents in urban parks where humans and wild and domestic animals are living in sympatry.
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Advances in Babesia Vaccine Development: An Overview. Pathogens 2023; 12:pathogens12020300. [PMID: 36839572 PMCID: PMC9962624 DOI: 10.3390/pathogens12020300] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 02/06/2023] [Accepted: 02/09/2023] [Indexed: 02/15/2023] Open
Abstract
Babesiosis is a tick-borne zoonotic disease, which is caused by various species of intracellular Babesia parasite. It is a problem not only for the livestock industry but also for global health. Significant global economic losses, in particular in cattle production, have been observed. Since the current preventive measures against babesiosis are insufficient, there is increasing pressure to develop a vaccine. In this review, we survey the achievements and recent advances in the creation of antibabesiosis vaccine. The scope of this review includes the development of a vaccine against B. microti, B. bovis, B. bigemina, B. orientalis and B. divergens. Here, we present different strategies in their progress and evaluation. Scientists worldwide are still trying to find new targets for a vaccine that would not only reduce symptoms among animals but also prevent the further spread of the disease. Molecular candidates for the production of a vaccine against various Babesia spp. are presented. Our study also describes the current prospects of vaccine evolution for successful Babesia parasites elimination.
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Mongruel ACB, Medici EP, da Costa Canena A, Calchi AC, Perles L, Rodrigues BCB, Soares JF, Machado RZ, André MR. Theileria terrestris nov. sp.: A Novel Theileria in Lowland Tapirs ( Tapirus terrestris) from Two Different Biomes in Brazil. Microorganisms 2022; 10:microorganisms10122319. [PMID: 36557572 PMCID: PMC9784709 DOI: 10.3390/microorganisms10122319] [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: 09/26/2022] [Revised: 11/09/2022] [Accepted: 11/14/2022] [Indexed: 11/25/2022] Open
Abstract
The low-land tapir (Tapirus terrestris) is the largest wild terrestrial mammal found in Brazil. Although T. terrestris has been already reported as a host of hemoparasites, the occurrence and genetic identity of Piroplasmida agents in this species is still cloudy. Although it is reported that Theileria equi, an endemic equid-infective agent in Brazil, is occurring in lowland tapirs, these reports are probably misconceived diagnoses since they are solely based on small fragments of 18S rRNA that may not achieve accurate topologies on phylogenetic analyses. The present study aimed to detect and investigate the identity of Theileria spp. in tapirs from Pantanal and Cerrado biomes. Blood-DNA samples from tapirs were screened for a partial (~800 bp) 18S rRNA gene fragment from Piroplasmida and 64 (64/122; 52.46% CI: 43.66-61.11%) presented bands of expected size. Samples were submitted to different protocols for molecular characterization, including near-full length 18S rRNA gene (~1500 bp), and the ema-1 gene from T. equi. Eight sequences were obtained for extended fragments (1182-1473 bp) from the 18S rRNA gene. Moreover, three sequences from partial cox-1 and five from partial hsp70 gene were obtained. None of the samples presented amplifications for the ema-1 gene. Phylogenetic and distance analyses from the 18S rRNA sequences obtained demonstrated a clear separation from tapirs' Theileria spp. and T. equi. Phylogenetic analyses of cox-1 and hsp70 sequences obtained herein also showed a unique clade formed by tapir's Theileria spp. Theileria terrestris sp. nov. is positioned apart from all other Theileria species in 18S rRNA, cox-1, and hps70 phylogenetic analyses. This novel proposed species represents a new Piroplasmida clade, yet to be characterized regarding biological features, vectors involved in the transmission cycles, additional vertebrate hosts, and pathogenicity.
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Affiliation(s)
- Anna Claudia Baumel Mongruel
- Vector-Borne Bioagents Laboratory (VBBL), Departamento de Patologia, Reprodução e Saúde Única—Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, UNESP, Jaboticabal 14884-900, SP, Brazil
| | - Emília Patrícia Medici
- Iniciativa Nacional para a Conservação da Anta Brasileira (INCAB), Instituto de Pesquisas Ecológicas (IPÊ), Campo Grande 79046-150, MS, Brazil
- Escola Superior de Conservação Ambiental e Sustentabilidade (ESCAS/IPÊ), Nazaré Paulista 12960-000, SP, Brazil
- IUCN SSC Tapir Specialist Group (TSG), Campo Grande 79046-150, MS, Brazil
| | - Ariel da Costa Canena
- Iniciativa Nacional para a Conservação da Anta Brasileira (INCAB), Instituto de Pesquisas Ecológicas (IPÊ), Campo Grande 79046-150, MS, Brazil
| | - Ana Cláudia Calchi
- Vector-Borne Bioagents Laboratory (VBBL), Departamento de Patologia, Reprodução e Saúde Única—Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, UNESP, Jaboticabal 14884-900, SP, Brazil
| | - Lívia Perles
- Vector-Borne Bioagents Laboratory (VBBL), Departamento de Patologia, Reprodução e Saúde Única—Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, UNESP, Jaboticabal 14884-900, SP, Brazil
| | - Bianca Cardenal Balla Rodrigues
- Vector-Borne Bioagents Laboratory (VBBL), Departamento de Patologia, Reprodução e Saúde Única—Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, UNESP, Jaboticabal 14884-900, SP, Brazil
| | - João Fabio Soares
- Laboratório de Protozoologia e Rickettsioses Vetoriais (ProtoZooVet), Departamento de Patologia Clínica Veterinária, Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul, Porto Alegre 90010-150, RS, Brazil
| | - Rosangela Zacarias Machado
- Vector-Borne Bioagents Laboratory (VBBL), Departamento de Patologia, Reprodução e Saúde Única—Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, UNESP, Jaboticabal 14884-900, SP, Brazil
| | - Marcos Rogério André
- Vector-Borne Bioagents Laboratory (VBBL), Departamento de Patologia, Reprodução e Saúde Única—Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, UNESP, Jaboticabal 14884-900, SP, Brazil
- Correspondence: ; Tel.: +55-16-3209-7302; Fax: +55-16-3202-4275
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André MR, Calchi AC, Furquim MEC, de Andrade I, Arantes PVC, de Melo Lopes LC, Demarchi IKLDN, Figueiredo MAP, de Paula Lima CA, Machado RZ. Molecular Detection of Tick-Borne Agents in Cats from Southeastern and Northern Brazil. Pathogens 2022; 11:106. [PMID: 35056054 PMCID: PMC8781600 DOI: 10.3390/pathogens11010106] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 01/13/2022] [Accepted: 01/14/2022] [Indexed: 12/18/2022] Open
Abstract
Even though the epidemiology of tick-borne agents (TBA) in dogs has been extensively investigated around the world, the occurrence, vectors involved, and molecular identity of these agents in cats remains elusive in many regions. Among TBA, Ehrlichia, Anaplasma, Babesia, Cytauxzoon, and Hepatozoon are responsible for diseases with non-specific clinical signs in cats, making essential the use of molecular techniques for accurate diagnosis and proper treatment. The present work aimed to investigate the occurrence and molecular identity of tick-borne agents (Ehrlichia, Anaplasma, Babesia/Theileria, Cytauxzoon, and Hepatozoon) in cats from southeastern (states of São Paulo (SP) and Minas Gerais (MG)) and northern (state of Rondônia (RO)) Brazil. For this purpose, 390 blood samples were collected from domiciled cats in MG (n = 155), SP (n = 151), and RO(n = 84) states, submitted to DNA extraction and PCR assays for Ehrlichia spp. (dsb gene), Anaplasma spp. (rrs gene), piroplasmids (18S rRNA gene), and Hepatozoon spp. (18S rRNA gene), sequencing, and phylogenetic inferences. The overall positivity for Anaplasma spp., Ehrlichia spp., Babesia/Theileria spp., Cytauxzoon spp., and Hepatozoon spp. were 7.4% (12.3% (MG) and 6.6% (SP)), 2% (4.5% (MG) and 0.6% (SP)), 0.7% (0.6% (MG), 0.6% (SP) and 1.2% (RO)), 27.2% (41.9% (MG), 24.5% (SP) and 4.8% (RO), and 0%, respectively. The phylogenetic analysis grouped the obtained sequences with 'Candidatus Anaplasma amazonensis', A. platys, B. vogeli, and Cytauxzoon sp. previously detected in wild felids from Brazil. qPCR specific for E. canis based on the dsb gene confirmed the molecular identity of the detected ehrlichial agent. The present study expanded the list and geographical distribution of hemoparasites in cats. 'Candidatus Anaplasma amazonensis', recently detected in sloths from northern Brazil, was described for the first time in cats. This is the first report of piroplasmids infecting cats in northern Brazil. Coinfection by Cytauxzoon and other TBA (Ehrlichia, Anaplasma, and B. vogeli) reported in the present study raises the need for veterinary practitioners' awareness of cats parasitized by multiple TBA.
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Affiliation(s)
- Marcos Rogério André
- Laboratório de Imunoparasitologia, Departamento de Patologia, Reprodução e Saúde Única—Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, UNESP, Jaboticabal 14884-900, SP, Brazil; (A.C.C.); (M.E.C.F.); (I.d.A.); (P.V.C.A.); (L.C.d.M.L.); (R.Z.M.)
| | - Ana Cláudia Calchi
- Laboratório de Imunoparasitologia, Departamento de Patologia, Reprodução e Saúde Única—Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, UNESP, Jaboticabal 14884-900, SP, Brazil; (A.C.C.); (M.E.C.F.); (I.d.A.); (P.V.C.A.); (L.C.d.M.L.); (R.Z.M.)
| | - Maria Eduarda Chiaradia Furquim
- Laboratório de Imunoparasitologia, Departamento de Patologia, Reprodução e Saúde Única—Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, UNESP, Jaboticabal 14884-900, SP, Brazil; (A.C.C.); (M.E.C.F.); (I.d.A.); (P.V.C.A.); (L.C.d.M.L.); (R.Z.M.)
| | - Isabela de Andrade
- Laboratório de Imunoparasitologia, Departamento de Patologia, Reprodução e Saúde Única—Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, UNESP, Jaboticabal 14884-900, SP, Brazil; (A.C.C.); (M.E.C.F.); (I.d.A.); (P.V.C.A.); (L.C.d.M.L.); (R.Z.M.)
| | - Paulo Vitor Cadina Arantes
- Laboratório de Imunoparasitologia, Departamento de Patologia, Reprodução e Saúde Única—Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, UNESP, Jaboticabal 14884-900, SP, Brazil; (A.C.C.); (M.E.C.F.); (I.d.A.); (P.V.C.A.); (L.C.d.M.L.); (R.Z.M.)
| | - Lara Cristina de Melo Lopes
- Laboratório de Imunoparasitologia, Departamento de Patologia, Reprodução e Saúde Única—Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, UNESP, Jaboticabal 14884-900, SP, Brazil; (A.C.C.); (M.E.C.F.); (I.d.A.); (P.V.C.A.); (L.C.d.M.L.); (R.Z.M.)
| | - Iuri Kauan Lins do Nascimento Demarchi
- Laboratório de Parasitologia, Entomologia e Biologia Molecular Aplicada à Saúde Única, Universidade Federal de Rondônia, Rolim de Moura 76940-000, RO, Brazil; (I.K.L.d.N.D.); (M.A.P.F.)
| | - Mayra Araguaia Pereira Figueiredo
- Laboratório de Parasitologia, Entomologia e Biologia Molecular Aplicada à Saúde Única, Universidade Federal de Rondônia, Rolim de Moura 76940-000, RO, Brazil; (I.K.L.d.N.D.); (M.A.P.F.)
| | | | - Rosangela Zacarias Machado
- Laboratório de Imunoparasitologia, Departamento de Patologia, Reprodução e Saúde Única—Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, UNESP, Jaboticabal 14884-900, SP, Brazil; (A.C.C.); (M.E.C.F.); (I.d.A.); (P.V.C.A.); (L.C.d.M.L.); (R.Z.M.)
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10
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Kim TY, Kim SY, Kim TK, Lee HI, Cho SH, Lee WG, Kim H. Molecular evidence of zoonotic Babesia species, other than B. microti, in ixodid ticks collected from small mammals in the Republic of Korea. Vet Med Sci 2021; 7:2427-2433. [PMID: 34492740 PMCID: PMC8604135 DOI: 10.1002/vms3.581] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
The occurrence of tick‐borne infectious diseases, including zoonotic babesiosis, has become a serious concern in recent years. In this study, we detected Babesia spp. using polymerase chain reaction (PCR) amplification of the 18S rRNA of the parasites isolated from ixodid ticks collected from small mammals in the Republic of Korea (ROK). Sequence analysis of the PCR amplicon revealed the presence of B. duncani, B. venatorum, B. capreoli/divergens, and, the most prevalent, B. microti in the ticks. The molecular phylogenetic analysis showed that the four species‐specific18S rRNA sequences clustered in four distinct clades. This is the first study to provide molecular evidence for the presence of zoonotic Babesia spp. other than B. microti in ticks in the ROK.
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Affiliation(s)
- Tae Yun Kim
- Division of Vectors and Parasitic Disease, Korea Disease Control and Prevention Agency, Cheongju-Si, Chungcheongbuk-Do, the Republic of Korea
| | - Seong Yoon Kim
- Division of Vectors and Parasitic Disease, Korea Disease Control and Prevention Agency, Cheongju-Si, Chungcheongbuk-Do, the Republic of Korea
| | - Tae-Kyu Kim
- Division of Vectors and Parasitic Disease, Korea Disease Control and Prevention Agency, Cheongju-Si, Chungcheongbuk-Do, the Republic of Korea
| | - Hee Il Lee
- Division of Vectors and Parasitic Disease, Korea Disease Control and Prevention Agency, Cheongju-Si, Chungcheongbuk-Do, the Republic of Korea
| | - Shin-Hyeong Cho
- Division of Vectors and Parasitic Disease, Korea Disease Control and Prevention Agency, Cheongju-Si, Chungcheongbuk-Do, the Republic of Korea
| | - Wook-Gyo Lee
- Division of Vectors and Parasitic Disease, Korea Disease Control and Prevention Agency, Cheongju-Si, Chungcheongbuk-Do, the Republic of Korea
| | - Hyunwoo Kim
- Division of Vectors and Parasitic Disease, Korea Disease Control and Prevention Agency, Cheongju-Si, Chungcheongbuk-Do, the Republic of Korea
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11
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Molecular detection of piroplasmids in synanthropic rodents, marsupials, and associated ticks from Brazil, with phylogenetic inference of a putative novel Babesia sp. from white-eared opossum (Didelphis albiventris). Parasitol Res 2021; 120:3537-3546. [PMID: 34448058 DOI: 10.1007/s00436-021-07284-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Accepted: 08/09/2021] [Indexed: 10/20/2022]
Abstract
The order Piroplasmida encompasses tick-borne pathogens of veterinary and medical importance positioned in two main families: Babesiidae and Theileriidae. Even though previous studies carried out in Brazil recorded the occurrence of piroplasmid species circulating in small mammals, 18S RNA gene sequences were only partially sequenced, preventing the assessment of their phylogenetic positioning. The current study aimed to detect and characterize, using morphological, molecular, and bioinformatic approaches, piroplasmids from wild mammals and associated ticks sampled in Central-Western Brazil. Out of 67 Didelphis albiventris sampled, 22 (16.4%) were positive for piroplasmids by PCR. In contrast, none of the 48 small rodents and 14 capybaras (Hydrochoerus hydrochaeris) was PCR-positive. Four Amblyomma dubitatum ticks-one from Rattus rattus, one from H. hydrochaeris, and two from D. albiventris-out of 114 Amblyomma spp. DNA samples were positive for piroplasmids by PCR. The phylogenetic inference performed using the near-complete 18S rRNA gene positioned the putative novel piroplasmid species detected in D. albiventris and associated A. dubitatum ticks near to Babesia sensu lato clade (Western group-cluster III) and distant from the Australian marsupial-associated piroplasms. Phylogenetic inferences based on two additional molecular markers, namely hsp-70 and cox-1, supported the near-complete 18S rRNA gene phylogenetic inference. Finally, the partial 18S rRNA gene sequences detected in ticks from rodents (R. rattus and H. hydrochaeris) showed 97.2-99.4% identity with the Piroplasmida previously detected in a capybara from Brazil, raising evidence that a still uncharacterized piroplasmid species has been identified in the capybara, the largest rodent species from South America.
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12
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First molecular detection of piroplasmids in non-hematophagous bats from Brazil, with evidence of putative novel species. Parasitol Res 2020; 120:301-310. [PMID: 33244622 DOI: 10.1007/s00436-020-06985-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Accepted: 11/22/2020] [Indexed: 10/22/2022]
Abstract
Piroplasmida is an order of the phylum Apicomplexa that comprises the Babesia, Cytauxzoon, and Theileria genera. These hemoparasites infect vertebrate blood cells and may cause serious diseases in animals and humans. Even though previous studies have shown that bats are infected by different species of piroplasmids, the occurrence and diversity of these hemoparasites have not been investigated in this group of mammals in Brazil. Therefore, the present work aimed to investigate the occurrence and assess the phylogenetic placement of piroplasmids infecting bats sampled in a peri-urban area from Central-Western Brazil. Seventeen (12.6%) out of 135 animals were positive by nested PCR assay for the detection of Babesia/Theileria targeting the 18S rRNA gene. Eleven sequences of the 17 positive samples could be analyzed and showed an identity of 91.8-100% with Theileria bicornis, Babesia vogeli, a Babesia sp. identified in a small rodent (Thrichomys pachyurus) from the Brazilian Pantanal and a Babesia sp. identified in a dog from Thailand as assessed by nBLAST. A phylogenetic tree was constructed from an alignment of 1399 bp length using analyzed and known piroplasmid 18S rRNA sequences. In this tree, piroplasmid 18S rRNA sequences detected in three specimens of Phyllostomus discolor (Piroplasmid n. sp., P. discolor) were placed as a sister taxon to Theileria sensu stricto (Clade V) and Babesia sensu stricto (Clade VI). An additional phylogenetic tree was generated from a shorter alignment of 524 bp length including analyzed piroplasmid 18S rRNA sequences of bat species Artibeus planirostris and A. lituratus (Piroplasmid sp., Artibeus spp.). The two 18S rRNA sequences detected in Artibeus spp. (Piroplasmid n. sp., Artibeus spp.) were placed within Babesia sensu stricto (Clade VI) into a strongly supported clade (bootstrap: 100) that included Babesia vogeli. The two 18S rRNA sequences of Piroplasmid sp., Artibeus spp. showed a single and a two-nucleotide differences, respectively, with respect to B. vogeli in a 709 pb length alignment. For the first time, the present study shows the occurrence of putative new piroplasmid species in non-hematophagous bats from Brazil.
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13
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Wei CY, Wang XM, Wang ZS, Wang ZH, Guan ZZ, Zhang LH, Dou XF, Wang H. High prevalence of Babesia microti in small mammals in Beijing. Infect Dis Poverty 2020; 9:155. [PMID: 33176879 PMCID: PMC7661193 DOI: 10.1186/s40249-020-00775-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Accepted: 11/02/2020] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND Babesiosis is an emerging tick-borne zoonotic infectious disease. Babesia microti is responsible for most cases of human babesiosis globally. It is important to investigate the prevalence of B. microti in the mammalian host population of a specific region in order to elucidate mechanisms of pathogen transmission and to define geographic areas where humans face the greatest risk of exposure. The aim of this study is to understand the prevalence and genotypes of B. microti in the small mammals that are found in Beijing, China. METHODS We trapped small mammals from all of the 16 urban, suburban, and outer suburban districts of Beijing during the years 2014, 2017 and 2018. Genomic DNA was extracted from the heart tissues individually and the Babesia 18S rRNA gene was detected by PCR. The genotypes of B. microti were identified based on sequence alignments and phylogenetic analysis. The morphology of the parasites was observed under light microscopy. The risk factors were analyzed statistically based on both univariate analyses and multivariate logistic regression. RESULTS A total of 1391 small mammals were collected. Positive infection of B. microti was detected in 12.1% (168/1391) of small mammals from 15 out of the 16 districts. Both Kobe-type and U.S.-type B. microti, accounting for 9.5% and 2.7%, respectively, were identified. Classic diverse morphologic forms of B. microti were observed. Specific types of ecological habitats including shrub areas, broad-leaved forest, and cropland were revealed to be risk factors associated with B. microti infection. CONCLUSIONS This study demonstrated the wide prevalence of B. microti infection in eight species of small mammals in Beijing, with Kobe-type more prevalent than U.S.-type. This study provides fundamental information for the development of informed prevention and control measures by public health authorities; the data gathered indicates a need for further monitoring of both clinical diseases in individuals presenting with babesiosis-like symptoms, as well as the infection status of ticks in high risk areas.
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Affiliation(s)
- Chun-Yan Wei
- Department of Microbiology and Parasitology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences & School of Basic Medicine, Peking Union Medical College, 5# Dong Dan San Tiao, Dongcheng District, Beijing, 100005, China
| | - Xiao-Mei Wang
- Institute for Infectious Disease and Endemic Disease Control, Beijing Center for Diseases Prevention and Control (Beijing Center for Preventive Medical Research), No. 16 Hepingli Middle Street, Dongcheng District, Beijing, 100013, China
| | - Zhen-Sheng Wang
- Department of Microbiology and Parasitology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences & School of Basic Medicine, Peking Union Medical College, 5# Dong Dan San Tiao, Dongcheng District, Beijing, 100005, China
| | - Zhi-Hua Wang
- Department of Microbiology and Parasitology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences & School of Basic Medicine, Peking Union Medical College, 5# Dong Dan San Tiao, Dongcheng District, Beijing, 100005, China.,Department of Immunology, Guilin Medical University, Guilin, 541000, Guangxi, China
| | - Zeng-Zhi Guan
- Institute for Infectious Disease and Endemic Disease Control, Beijing Center for Diseases Prevention and Control (Beijing Center for Preventive Medical Research), No. 16 Hepingli Middle Street, Dongcheng District, Beijing, 100013, China
| | - Lian-Hui Zhang
- Department of Microbiology and Parasitology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences & School of Basic Medicine, Peking Union Medical College, 5# Dong Dan San Tiao, Dongcheng District, Beijing, 100005, China
| | - Xiang-Feng Dou
- Institute for Infectious Disease and Endemic Disease Control, Beijing Center for Diseases Prevention and Control (Beijing Center for Preventive Medical Research), No. 16 Hepingli Middle Street, Dongcheng District, Beijing, 100013, China.
| | - Heng Wang
- Department of Microbiology and Parasitology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences & School of Basic Medicine, Peking Union Medical College, 5# Dong Dan San Tiao, Dongcheng District, Beijing, 100005, China.
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14
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Moustafa MAM, Sasaki A, Shimozuru M, Nakao R, Sashika M, Yamazaki K, Koike S, Tanaka J, Tamatani H, Yamanaka M, Ishinazaka T, Tsubota T. Molecular detection of apicomplexan protozoa in Hokkaido brown bears (Ursus arctos yesoensis) and Japanese black bears (Ursus thibetanus japonicus). Parasitol Res 2020; 119:3739-3753. [PMID: 33000433 DOI: 10.1007/s00436-020-06873-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Accepted: 08/30/2020] [Indexed: 11/27/2022]
Abstract
Many tick-borne pathogens (TBPs) are present in wildlife. The objective of this study is to reveal the role of wild bears in maintaining TBPs. A total of 49 brown bears (Ursus arctos yesoensis) from Hokkaido, and 18 Japanese black bears (Ursus thibetanus japonicus) from Tochigi, and 66 Japanese black bears from Nagano were examined by two molecular methods, reverse line blot (RLB) hybridization, and nested PCR. A total of 5 TBPs (Hepatozoon ursi, Babesia sp. UR2-like group, Cytauxzoon sp. UR1, Babesia sp. UR1, and Babesia microti) were detected from bear blood DNA samples. B. microti was detected from blood DNA samples of Japanese black bear for the first time, with the prevalence of 6.0% (5/84). Out of detected pathogens, H. ursi, Babesia sp. UR2-like pathogens, and Cytauxzoon sp. UR1 were considered as three of the most prevalent TBPs in bears. The prevalence of H. ursi were significantly higher in Japanese black bear (0% vs 96.4%) while that of Babesia sp. UR2-like group was higher in Hokkaido brown bears (89.8% vs 40.5%). The prevalence of Babesia sp. UR1 were significantly higher in Japanese black bears from Tochigi (44.4%), comparing with those from Nagano (18.2%). The prevalence of the detected TBPs were significantly higher in adult bears, comparing with those in younger bears. The present study suggests that Japanese bear species contribute in the transmission of several TBPs in Japan. The expanding distribution of bears might cause the accidental transmission of TBPs to humans and domestic animals.
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Affiliation(s)
- Mohamed Abdallah Mohamed Moustafa
- Laboratory of Parasitology, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, Hokkaido, Japan.,Department of Animal Medicine, Faculty of Veterinary Medicine, South Valley University, Qena, Egypt
| | - Ayaka Sasaki
- Laboratory of Wildlife Biology and Medicine, Department of Environmental Veterinary Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, Japan
| | - Michito Shimozuru
- Laboratory of Wildlife Biology and Medicine, Department of Environmental Veterinary Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, Japan
| | - Ryo Nakao
- Laboratory of Parasitology, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Mariko Sashika
- Laboratory of Wildlife Biology and Medicine, Department of Environmental Veterinary Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, Japan
| | - Koji Yamazaki
- Department of Forest Science, Tokyo University of Agriculture, Tokyo, Japan
| | - Shinsuke Koike
- Institute of Global Innovation Research, Tokyo University of Agriculture and Technology, Tokyo, Japan.,United Graduate School of Agriculture Science, Tokyo University of Agriculture and Technology, Tokyo, Japan
| | - Junpei Tanaka
- Picchio Wildlife Research Center, Karuizawa, Nagano, Japan
| | - Hiroo Tamatani
- Picchio Wildlife Research Center, Karuizawa, Nagano, Japan
| | | | | | - Toshio Tsubota
- Laboratory of Wildlife Biology and Medicine, Department of Environmental Veterinary Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, Japan.
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Yu L, Zhan X, Liu Q, Sun Y, Li M, Zhao Y, An X, Tian Y, He L, Zhao J. Identifying the Naphthalene-Based Compound 3,5-Dihydroxy 2-Napthoic Acid as a Novel Lead Compound for Designing Lactate Dehydrogenase-Specific Antibabesial Drug. Front Pharmacol 2020; 10:1663. [PMID: 32116673 PMCID: PMC7025647 DOI: 10.3389/fphar.2019.01663] [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: 08/01/2019] [Accepted: 12/19/2019] [Indexed: 01/28/2023] Open
Abstract
Human babesiosis is caused by apicomplexan Babesia parasites, including Babesia microti, Babesia crassa, Babesia sp. MOI, Babesia divergens, Babesia duncani, and Babesia venatorum. Among them, B. microti is the most common cause of human and rodent babesiosis. Currently, no vaccine is available, and drugs for the treatment have high failure rates and side effects. Due to lack of a traditional tricarboxylic acid cycle (TCA cycle) and its dominant dependence on anaerobic metabolism to produce ATP, B. microti lactate dehydrogenase (BmLDH) was assumed to play a critical role in B. microti ATP supply. Our previous study demonstrated that BmLDH is a potential drug target and Arg99 is a crucial site. Herein, a molecular docking was performed based on the crystal structure of BmLDH from a series of gossypol derivatives or structural analogs to find the potent inhibitors interacting with the residue Arg99, and three naphthalene-based compounds 2,6-naphthalenedicarboxylic acid (NDCA), 1,6-dibromo-2-hydroxynapthalene 3-carboxylic acid (DBHCA), and 3,5-dihydroxy 2-napthoic acid (DHNA) were selected for further tests. Enzyme activity inhibitory experiments show that DBHCA and DHNA inhibit recombinant BmLDH (rBmLDH) catalysis with ~109-fold and ~5,000-fold selectivity over human LDH, respectively. Surface plasmon resonance (SPR) assays demonstrate that DHNA has a lower K D value to BmLDH (3.766 x 10-5 M), in contrast to a higher value for DBHCA (3.988 x 10-8 M). A comparison of the kinetic parameters [association constant (k a) and dissociation constant (k d) values] reveals that DBHCA can bind the target faster than DHNA, while the complex of DHNA with the target dissociates slower than that of DBHCA. Both DBHCA and DHNA can inhibit the growth of B. microti in vitro with half-maximal inhibitory concentration (IC50) values of 84.83 and 85.65 μM, respectively. Cytotoxicity tests in vitro further indicate that DBHCA and DHNA have selectivity indexes (SI) of 2.6 and 22.1 between B. microti and Vero cells, respectively. Although the two naphthalene-based compounds only display modest inhibitory activity against both rBmLDH and the growth of B. microti, the compound DHNA features high selectivity and could serve as a novel lead compound for designing LDH-specific antibabesial drug.
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Affiliation(s)
- Long Yu
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China.,Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Huazhong Agricultural University, Wuhan, China
| | - Xueyan Zhan
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China.,Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Huazhong Agricultural University, Wuhan, China
| | - Qin Liu
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China.,Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Huazhong Agricultural University, Wuhan, China
| | - Yali Sun
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China.,Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Huazhong Agricultural University, Wuhan, China
| | - Muxiao Li
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China.,Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Huazhong Agricultural University, Wuhan, China
| | - Yangnan Zhao
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China.,Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Huazhong Agricultural University, Wuhan, China
| | - Xiaomeng An
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China.,Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Huazhong Agricultural University, Wuhan, China
| | - Yu Tian
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
| | - Lan He
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China.,Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Huazhong Agricultural University, Wuhan, China.,Key Laboratory of Animal Epidemical Disease and Infectious Zoonoses, Ministry of Agriculture, Huazhong Agricultural University, Wuhan, China
| | - Junlong Zhao
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China.,Key Laboratory of Preventive Veterinary Medicine in Hubei Province, Huazhong Agricultural University, Wuhan, China.,Key Laboratory of Animal Epidemical Disease and Infectious Zoonoses, Ministry of Agriculture, Huazhong Agricultural University, Wuhan, China
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Hong SH, Kim SY, Song BG, Rho JR, Cho CR, Kim CN, Um TH, Kwak YG, Cho SH, Lee SE. Detection and characterization of an emerging type of Babesia sp. similar to Babesia motasi for the first case of human babesiosis and ticks in Korea. Emerg Microbes Infect 2019; 8:869-878. [PMID: 31179860 PMCID: PMC6566668 DOI: 10.1080/22221751.2019.1622997] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Babesiosis is a tick-transmitted intraerythrocytic zoonosis. In Korea, the first mortalities were reported in 2005 due to Babesia sp. detection in sheep; herein we report epidemiological and genetic characteristics of a second case of babesiosis. Microscopic analysis of patient blood revealed polymorphic merozoites. To detect Babesia spp., PCR was performed using Babesia specific primers for β-tubulin, 18S rDNA, COB, and COX3 gene fragments. 18S rDNA analysis for Babesia sp., showed 98% homology with ovine Babesia sp. and with Babesia infections in Korea in 2005. Moreover, phylogenetic analysis of 18S rDNA, COB, and COX3 revealed close associations with B. motasi. For identifying the infectious agent, Haemaphysalis longicornis (296) and Haemaphysalis flava (301) were collected around the previous residence of the babesiosis patient. Babesia genes were identified in three H. longicornis: one sample was identified as B. microti and two samples were 98% homologous to B. motasi. Our study is the first direct confirmation of the infectious agent for human babesiosis. This case most likely resulted from tick bites from ticks near the patient house of the babesiosis patient. H. longicornis has been implicated as a vector of B. microti and other Babesia sp. infections.
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Affiliation(s)
- Sung-Hee Hong
- a Division of Vectors and Parasitic Diseases , Korea Center for Disease Control and Prevention , Cheongju , Korea
| | - Seong-Yoon Kim
- a Division of Vectors and Parasitic Diseases , Korea Center for Disease Control and Prevention , Cheongju , Korea
| | - Bong Goo Song
- a Division of Vectors and Parasitic Diseases , Korea Center for Disease Control and Prevention , Cheongju , Korea
| | - Jong-Rul Rho
- a Division of Vectors and Parasitic Diseases , Korea Center for Disease Control and Prevention , Cheongju , Korea
| | - Chong Rae Cho
- b Department of Laboratory Medicine , Inje University Ilsan Paik Hospital , Goyang , Korea
| | - Chul-Nam Kim
- c Department of Surgery , Inje University Ilsan Paik Hospital , Goyang , Korea
| | - Tae-Hyun Um
- b Department of Laboratory Medicine , Inje University Ilsan Paik Hospital , Goyang , Korea
| | - Yee Gyung Kwak
- d Department of Internal Medicine , Inje University Ilsan Paik Hospital , Goyang , Korea
| | - Shin-Hyeong Cho
- a Division of Vectors and Parasitic Diseases , Korea Center for Disease Control and Prevention , Cheongju , Korea
| | - Sang-Eun Lee
- a Division of Vectors and Parasitic Diseases , Korea Center for Disease Control and Prevention , Cheongju , Korea
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Inácio EL, Pérez-Macchi S, Alabi A, Bittencourt P, Müller A. Prevalence and molecular characterization of piroplasmids in domestic dogs from Paraguay. Ticks Tick Borne Dis 2019; 10:321-327. [DOI: 10.1016/j.ttbdis.2018.11.009] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Revised: 10/23/2018] [Accepted: 11/11/2018] [Indexed: 10/27/2022]
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Sayama Y, Zamoto-Niikura A, Matsumoto C, Saijo M, Ishihara C, Matsubayashi K, Nagai T, Satake M. Analysis of antigen-antibody cross-reactivity among lineages and sublineages of Babesia microti parasites using human babesiosis specimens. Transfusion 2018. [PMID: 29524239 DOI: 10.1111/trf.14558] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Human babesiosis is caused mainly by Babesia microti and has recently become a public health concern due to an increase in transfusion-transmitted infection. Thus, the development of an antibody detection method with high specificity and sensitivity is a priority. Seroreactivity against B. microti has been reported to be highly specific not only to B. microti lineages but also to sublineages. This study aimed to elucidate the human antibody reactivity against various lineages, including US, Kobe, and Hobetsu, and sublineages (North America and East Asia) in the US lineage. STUDY DESIGN AND METHODS Twenty samples obtained from individuals infected with B. microti in the United States were tested for the presence of anti-B. microti antibodies using indirect immunofluorescence assay (IFA) and Western blotting (WB) to indicate antigens of each (sub-)lineage. RESULTS By IFA, 20 samples showed reactivity to the North America sublineage (titer range, 64-4096), 16 to the East Asia sublineage (64-512), 10 to the Kobe (64-128), and five to the Hobetsu (64). Antibody titers to the East Asia sublineage, Kobe, and Hobetsu were significantly lower than those to the North America sublineage (p < 0.01). By WB, in parallel with the IFA results, 18 samples showed strong reactions to the North America sublineage, weak reactions to the East Asia sublineage, and near-zero reactions to the Kobe and Hobetsu. CONCLUSION Human antibodies induced by B. microti infection are highly specific against B. microti lineages and sublineages with low cross-reactivity. Developing a precise antibody detection method may require specific antigens based on B. microti lineages and sublineages.
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Affiliation(s)
- Yusuke Sayama
- Central Blood Institute, Blood Service Headquarters, Japanese Red Cross Society, National Institute of Infectious Diseases, Tokyo, Japan.,Department of Virology I, National Institute of Infectious Diseases, Tokyo, Japan
| | - Aya Zamoto-Niikura
- Division of Experimental Animal Diseases, National Institute of Infectious Diseases, Tokyo, Japan
| | - Chieko Matsumoto
- Central Blood Institute, Blood Service Headquarters, Japanese Red Cross Society, National Institute of Infectious Diseases, Tokyo, Japan
| | - Masayuki Saijo
- Department of Virology I, National Institute of Infectious Diseases, Tokyo, Japan
| | - Chiaki Ishihara
- School of Veterinary Medicine, Rakuno-Gakuen University, Ebetsu, Japan
| | - Keiji Matsubayashi
- Central Blood Institute, Blood Service Headquarters, Japanese Red Cross Society, National Institute of Infectious Diseases, Tokyo, Japan
| | - Tadashi Nagai
- Central Blood Institute, Blood Service Headquarters, Japanese Red Cross Society, National Institute of Infectious Diseases, Tokyo, Japan
| | - Masahiro Satake
- Central Blood Institute, Blood Service Headquarters, Japanese Red Cross Society, National Institute of Infectious Diseases, Tokyo, Japan
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Hong SH, Kim HJ, Jeong YI, Cho SH, Lee WJ, Kim JT, Lee SE. Serological and Molecular Detection of Toxoplasma gondii and Babesia microti in the Blood of Rescued Wild Animals in Gangwon-do (Province), Korea. THE KOREAN JOURNAL OF PARASITOLOGY 2017; 55:207-212. [PMID: 28506045 PMCID: PMC5450965 DOI: 10.3347/kjp.2017.55.2.207] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Revised: 02/25/2017] [Accepted: 03/18/2017] [Indexed: 11/25/2022]
Abstract
Infections of Toxoplasma gondii and Babesia microti are reported in many wild animals worldwide, but information on their incidence and molecular detection in Korean wild fields is limited. In this study, the prevalence of T. gondii and B. microti infection in blood samples of 5 animal species (37 Chinese water deer, 23 raccoon dogs, 6 roe deer, 1 wild boar, and 3 Eurasian badgers) was examined during 2008–2009 in Gangwon-do (Province), the Republic of Korea (=Korea) by using serological and molecular tests. The overall seropositivity of T. gondii was 8.6% (6/70); 10.8% in Chinese water deer, 4.3% in raccoon dogs, and 16.7% in roe deer. PCR revealed only 1 case of T. gondii infection in Chinese water deer, and phylogenic analysis showed that the positive isolate was practically identical to the highly pathogenetic strain type I. In B. microti PCR, the positive rate was 5.7% (4/70), including 2 Chinese water deer and 2 Eurasian badgers. Phylogenetic analysis results of 18S rRNA and the β-tubulin gene showed that all positive isolates were US-type B. microti. To our knowledge, this is the first report of B. microti detected in Chinese water deer and Eurasian badger from Korea. These results indicate a potentially high prevalence of T. gondii and B. microti in wild animals of Gangwon-do, Korea. Furthermore, Chinese water deer might act as a reservoir for parasite infections of domestic animals.
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Affiliation(s)
- Sung-Hee Hong
- Division of Malaria and Parasitc Diseases, Korea National Institute of Health, Korea Center for Disease Control and Prevention, Cheongju 28159, Korea
| | - Hee-Jong Kim
- Colleage of Veterinary Medicine, Gangwon National University, Chuncheon 24341, Korea
| | - Young-Il Jeong
- Division of Malaria and Parasitc Diseases, Korea National Institute of Health, Korea Center for Disease Control and Prevention, Cheongju 28159, Korea
| | - Shin-Hyeong Cho
- Division of Malaria and Parasitc Diseases, Korea National Institute of Health, Korea Center for Disease Control and Prevention, Cheongju 28159, Korea
| | - Won-Ja Lee
- Division of Malaria and Parasitc Diseases, Korea National Institute of Health, Korea Center for Disease Control and Prevention, Cheongju 28159, Korea
| | - Jong-Tak Kim
- Colleage of Veterinary Medicine, Gangwon National University, Chuncheon 24341, Korea
| | - Sang-Eun Lee
- Division of Malaria and Parasitc Diseases, Korea National Institute of Health, Korea Center for Disease Control and Prevention, Cheongju 28159, Korea
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Ixodes persulcatus Ticks as Vectors for the Babesia microti U.S. Lineage in Japan. Appl Environ Microbiol 2016; 82:6624-6632. [PMID: 27590815 DOI: 10.1128/aem.02373-16] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Accepted: 08/26/2016] [Indexed: 12/19/2022] Open
Abstract
The U.S. lineage, one of the major clades in the Babesia microti group, is known as a causal agent of human babesiosis mostly in the northeastern and upper midwestern United States. This lineage, however, also is distributed throughout the temperate zone of Eurasia with several reported human cases, although convincing evidence of the identity of the specific vector(s) in this area is lacking. Here, the goal was to demonstrate the presence of infectious parasites directly in salivary glands of Ixodes persulcatus, from which U.S. lineage genetic sequences have been detected in Asia, and to molecularly characterize the isolates. Five PCR-positive specimens were individually inoculated into hamsters, resulting in infections in four; consequently, four strains were newly established. Molecular characterization, including 18S rRNA, β-tubulin, and CCT7 gene sequences, as well as Western blot analysis and indirect fluorescent antibody assay, revealed that all four strains were identical to each other and to the U.S. lineage strains isolated from rodents captured in Japan. The 18S rRNA gene sequence from the isolates was identical to those from I. persulcatus in Russia and China, but the genetic and antigenic profiles of the Japanese parasites differ from those in the United States and Europe. Together with previous epidemiological and transmission studies, we conclude that I. persulcatus is likely the principal vector for the B. microti U.S. lineage in Japan and presumably in northeastern Eurasia. IMPORTANCE The major cause of human babesiosis, the tick-borne blood parasite Babesia microti, U.S. lineage, is widely distributed in the temperate Northern Hemisphere. However, the specific tick vector(s) remains unidentified in Eurasia, where there are people with antibodies to the B. microti U.S. lineage and cases of human babesiosis. In this study, the first isolation of B. microti U.S. lineage from Ixodes persulcatus ticks, a principal vector for many tick-borne diseases, is described in Japan. Limited antigenic cross-reaction was found between the Japan and United States isolates. Thus, current serological tests based on U.S. isolates may underestimate B. microti occurrence outside the United States. This study and previous studies indicate that I. persulcatus is part of the B. microti U.S. lineage life cycle in Japan and, presumably, northeastern Eurasia. This report will be important for public health, especially since infection may occur through transfusion, and also to researchers in the field of parasitology.
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High prevalence of Babesia microti ‘Munich’ type in small mammals from an Ixodes persulcatus/Ixodes trianguliceps sympatric area in the Omsk region, Russia. Parasitol Res 2016; 115:3619-29. [DOI: 10.1007/s00436-016-5128-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2016] [Accepted: 05/12/2016] [Indexed: 02/07/2023]
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Li LH, Zhu D, Zhang CC, Zhang Y, Zhou XN. Experimental transmission of Babesia microti by Rhipicephalus haemaphysaloides. Parasit Vectors 2016; 9:231. [PMID: 27112141 PMCID: PMC4845380 DOI: 10.1186/s13071-016-1517-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Accepted: 04/18/2016] [Indexed: 12/22/2022] Open
Abstract
Background Human babesiosis is considered an emerging threat in China. Dozens of human infections with Babesia microti have been reported recently, especially in southern China. However, the transmission vectors of this parasite in these areas are not well understood. Rhipicephalus haemaphysaloides, which is one of the dominant tick species in southern China, is a major vector of bovine babesiosis in China. However, whether this tick has the potential to transmit B. microti has not been tested. The present study experimentally investigated the transmission competence of B. microti through R. haemaphysaloides ticks. Methods Larvae and nymphs of R. haemaphysaloides ticks were fed on laboratory mice infected by B. microti. The infection was detected by PCR at 4 weeks post-molting. BALB/c and NOD/SCID mice were infested by nymphs molting from larvae that ingested the blood of infective mice, and blood samples were then analyzed by PCR. Results Experimental transstadial transmission of R. haemaphysaloides for B. microti was proved in both the larvae to nymph and the nymph to adult transstadial routes. The positive rate of B. microti was 43.8 % in nymphs developed from larvae consumed infected mice and 96.7 % in adults developed from nymphs exposed to positive mice. Among the mice infested by infective nymphs, B. microti was detected in 16.7 % (2/12) of the BALB/c mice and in all of the NOD/SCID (6/6). However, the parasite was not observed to persist beyond more than one molt, and transovarial transmission did not occur. Conclusions This is the first study to demonstrate that B. microti can be transmitted artificially by R. haemaphysaloides. This tick species might be a potential vector of human babesiosis in southern China, which represents a public health concern.
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Affiliation(s)
- Lan-Hua Li
- Key Laboratory of Parasite & Vector Biology, Ministry of Health, National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, WHO Collaborating Centre for Malaria, Schistosomiasis and Filariasis, Shanghai, 200025, People's Republic of China.,School of Publish Health and Management, Weifang Medical University, Weifang, 261053, PR China
| | - Dan Zhu
- Key Laboratory of Parasite & Vector Biology, Ministry of Health, National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, WHO Collaborating Centre for Malaria, Schistosomiasis and Filariasis, Shanghai, 200025, People's Republic of China
| | - Chen-Chen Zhang
- Key Laboratory of Parasite & Vector Biology, Ministry of Health, National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, WHO Collaborating Centre for Malaria, Schistosomiasis and Filariasis, Shanghai, 200025, People's Republic of China
| | - Yi Zhang
- Key Laboratory of Parasite & Vector Biology, Ministry of Health, National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, WHO Collaborating Centre for Malaria, Schistosomiasis and Filariasis, Shanghai, 200025, People's Republic of China.
| | - Xiao-Nong Zhou
- Key Laboratory of Parasite & Vector Biology, Ministry of Health, National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, WHO Collaborating Centre for Malaria, Schistosomiasis and Filariasis, Shanghai, 200025, People's Republic of China.
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23
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The PCR detection and phylogenetic characterization of Babesia microti in questing ticks in Mongolia. Parasitol Int 2015. [DOI: 10.1016/j.parint.2015.07.007] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Bajer A, Alsarraf M, Bednarska M, Mohallal EME, Mierzejewska EJ, Behnke-Borowczyk J, Zalat S, Gilbert F, Welc-Falęciak R. Babesia behnkei sp. nov., a novel Babesia species infecting isolated populations of Wagner's gerbil, Dipodillus dasyurus, from the Sinai Mountains, Egypt. Parasit Vectors 2014; 7:572. [PMID: 25487227 PMCID: PMC4271447 DOI: 10.1186/s13071-014-0572-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2014] [Accepted: 11/25/2014] [Indexed: 11/23/2022] Open
Abstract
Background Although a number of new species of Babesia/Theileria have been described recently, there are still relatively few reports of species from Africa. In this study based on the evaluation of morphology and phylogenetic relationships, we describe a novel species from Wagner’s gerbil, Babesia behnkei n. sp. Methods Rodents (n = 1021) were sampled in four montane valleys (wadies) in 2000, 2004, 2008 and 2012 in the Sinai Mountains, Egypt. The overall prevalence of Babesia spp. was highest in the Wagner’s gerbil (Dipodillus dasyurus; 38.7%) in comparison to the prevalence in the spiny mice species, Acomys dimidiatus and A. russatus. Morphological investigations were conducted for the comparison of trophozoites of the novel species of Babesia with the B. microti King’s 67 reference strain. Thirty-two isolates derived from D. dasyurus over a 9 year period (2004-2012) from two wadies (29 isolates from Wadi Gebel and 3 from Wadi El-Arbaein) were investigated by microscopic, molecular and phylogenetic analysis. A near-full-length sequence of the 18S rRNA gene and the second internal transcribed spacer (ITS2) region were amplified, sequenced and used for the construction of phylogenetic trees. Results A novel species of Babesia was identified in two isolated populations of D. dasyurus. Phylogenetic analysis of 18S rDNA and ITS2 sequences revealed that B. behnkei n. sp. is most closely related to B. lengau from cheetahs from South Africa and to Nearctic species found only in North America (the pathogenic B. duncani and B. conradae) and that it is more distant to the cosmopolitan rodent parasite B. microti. Trophozoites of B. behnkei were smaller and less polymorphic than trophozoites of B. microti. Conclusion Babesia behnkei n. sp. is a novel species of the ‘Duncani group’ maintained in isolated populations of Dipodillus dasyurus occurring in the Sinai Mountains of Egypt. Electronic supplementary material The online version of this article (doi:10.1186/s13071-014-0572-9) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Anna Bajer
- Department of Parasitology, Institute of Zoology, Faculty of Biology, University of Warsaw, 1 Miecznikowa Street, 02-096, Warsaw, Poland.
| | - Mohammed Alsarraf
- Department of Parasitology, Institute of Zoology, Faculty of Biology, University of Warsaw, 1 Miecznikowa Street, 02-096, Warsaw, Poland.
| | - Małgorzata Bednarska
- Department of Parasitology, Institute of Zoology, Faculty of Biology, University of Warsaw, 1 Miecznikowa Street, 02-096, Warsaw, Poland.
| | | | - Ewa J Mierzejewska
- Department of Parasitology, Institute of Zoology, Faculty of Biology, University of Warsaw, 1 Miecznikowa Street, 02-096, Warsaw, Poland.
| | - Jolanta Behnke-Borowczyk
- Department of Forest Phytopathology, Faculty of Forestry, Poznań University of Life Sciences, Poznań, Poland.
| | - Sammy Zalat
- Department of Zoology, Suez Canal University, Ismailia, Egypt.
| | - Francis Gilbert
- Faculty of Medicine & Health Sciences, School of Biology, University of Nottingham, Nottingham, UK.
| | - Renata Welc-Falęciak
- Department of Parasitology, Institute of Zoology, Faculty of Biology, University of Warsaw, 1 Miecznikowa Street, 02-096, Warsaw, Poland.
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Zhou X, Xia S, Huang JL, Tambo E, Zhuge HX, Zhou XN. Human babesiosis, an emerging tick-borne disease in the People's Republic of China. Parasit Vectors 2014; 7:509. [PMID: 25403908 PMCID: PMC4254216 DOI: 10.1186/s13071-014-0509-3] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2014] [Accepted: 10/28/2014] [Indexed: 12/15/2022] Open
Abstract
Babesiosis is a typical zoonotic, emerging disease caused by a tick-borne intraerythrocytic protozoan of Babesia spp. that also can be transmitted by blood transfusion. Babesiosis imposes an increasing public-health threat. We reviewed and mapped epidemiological studies on Babesia in vectors and/or rodents in the People’s Republic of China (P.R. China) and found that B. microti was the predominant species detected in the investigated regions such as Heilongjiang, Zhejiang, Fujian provinces and Taiwan island. We reviewed a series of sporadic human babesiosis cases collected from 1940’s to 2013, in Yunnan, Inner Mongolia, Taiwan and Zhejiang and other regions including a main endemic area of malaria on the China-Myanmar border areas in P.R. China. Clinical manifestations of human babesiosis were also reviewed. Human babesiosis may have previously been overlooked in P.R. China due to a lack of medical awareness and the limitation of clinical diagnostic methods.
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Affiliation(s)
- Xia Zhou
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, WHO Collaborating Centre for Malaria, Schistosomiasis and Filariasis; Key Laboratory of Parasite & Vector Biology, Ministry of Health, Shanghai, 200025, People's Republic of China. .,Department of Parasitology, Medical College of Soochow University, No.199 Renai Road, Suzhou, 215123, People's Republic of China.
| | - Shang Xia
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, WHO Collaborating Centre for Malaria, Schistosomiasis and Filariasis; Key Laboratory of Parasite & Vector Biology, Ministry of Health, Shanghai, 200025, People's Republic of China.
| | - Ji-Lei Huang
- Department of Parasitology, Medical College of Soochow University, No.199 Renai Road, Suzhou, 215123, People's Republic of China.
| | - Ernest Tambo
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, WHO Collaborating Centre for Malaria, Schistosomiasis and Filariasis; Key Laboratory of Parasite & Vector Biology, Ministry of Health, Shanghai, 200025, People's Republic of China. .,Biochemistry Department, Centers for Sustainable Malaria Control, Faculty of Natural & Agricultural Sciences, University of Pretoria, Pretoria, South Africa.
| | - Hong-Xiang Zhuge
- Department of Parasitology, Medical College of Soochow University, No.199 Renai Road, Suzhou, 215123, People's Republic of China.
| | - Xiao-Nong Zhou
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, WHO Collaborating Centre for Malaria, Schistosomiasis and Filariasis; Key Laboratory of Parasite & Vector Biology, Ministry of Health, Shanghai, 200025, People's Republic of China.
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Nakayima J, Hayashida K, Nakao R, Ishii A, Ogawa H, Nakamura I, Moonga L, Hang'ombe BM, Mweene AS, Thomas Y, Orba Y, Sawa H, Sugimoto C. Detection and characterization of zoonotic pathogens of free-ranging non-human primates from Zambia. Parasit Vectors 2014; 7:490. [PMID: 25358853 PMCID: PMC4221724 DOI: 10.1186/s13071-014-0490-x] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2014] [Accepted: 10/13/2014] [Indexed: 11/13/2022] Open
Abstract
Background Wildlife may harbor infectious pathogens that are of zoonotic concern acting as a reservoir of diseases transmissible to humans and domestic animals. This is due to human-wildlife conflicts that have become more frequent and severe over recent decades, competition for the available natural habitats and resources leading to increased human encroachment on previously wild and uninhabited areas. Methods A total of 88 spleen DNA samples from baboons and vervet monkeys from Zambia were tested for zoonotic pathogens using genus or species-specific PCR. The amplified products were then subjected to sequencing analysis. Results We detected three different pathogenic agents, including Anaplasma phagocytophilum in 12 samples (13.6%), Rickettsia spp. in 35 samples (39.8%) and Babesia spp. in 2 samples (2.3%). Conclusion The continuously increasing contacts between humans and primate populations raise concerns about transmission of pathogens between these groups. Therefore, increased medical and public awareness and public health surveillance support will be required to detect and control infections caused by these agents at the interface between humans and wildlife.
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Affiliation(s)
- Jesca Nakayima
- Division of Collaboration and Education, Research Center for Zoonosis Control, Hokkaido University, Kita 20, Nishi 10, Kita-ku, Sapporo, Hokkaido, 001-0020, Japan. .,National Livestock Resources Research Institute (NaLIRRI), P.O. Box 96, Tororo, Uganda.
| | - Kyoko Hayashida
- Division of Collaboration and Education, Research Center for Zoonosis Control, Hokkaido University, Kita 20, Nishi 10, Kita-ku, Sapporo, Hokkaido, 001-0020, Japan.
| | - Ryo Nakao
- Unit of Risk Analysis and Management, Research Center for Zoonosis Control, Hokkaido University, Kita 20, Nishi 10, Kita-ku, Sapporo, Hokkaido, 001-0020, Japan.
| | - Akihiro Ishii
- Hokudai Center for Zoonosis Control in Zambia, School of Veterinary Medicine, University of Zambia, PO Box 32379, Lusaka, Zambia.
| | - Hirohito Ogawa
- Hokudai Center for Zoonosis Control in Zambia, School of Veterinary Medicine, University of Zambia, PO Box 32379, Lusaka, Zambia.
| | - Ichiro Nakamura
- Division of Collaboration and Education, Research Center for Zoonosis Control, Hokkaido University, Kita 20, Nishi 10, Kita-ku, Sapporo, Hokkaido, 001-0020, Japan.
| | - Ladslav Moonga
- Department of Paraclinical Studies, School of Veterinary Medicine, University of Zambia, PO Box 32379, Lusaka, Zambia.
| | - Bernard M Hang'ombe
- Department of Paraclinical Studies, School of Veterinary Medicine, University of Zambia, PO Box 32379, Lusaka, Zambia.
| | - Aaron S Mweene
- Department of Disease Control, School of Veterinary Medicine, University of Zambia, PO Box 32379, Lusaka, Zambia.
| | - Yuka Thomas
- Hokudai Center for Zoonosis Control in Zambia, School of Veterinary Medicine, University of Zambia, PO Box 32379, Lusaka, Zambia.
| | - Yasuko Orba
- Division of Molecular Pathobiology, Research Center for Zoonosis Control, Hokkaido University, N20, W10, Kita-ku, Sapporo, 001-0020, Japan.
| | - Hirofumi Sawa
- Division of Molecular Pathobiology, Research Center for Zoonosis Control, Hokkaido University, N20, W10, Kita-ku, Sapporo, 001-0020, Japan.
| | - Chihiro Sugimoto
- Division of Collaboration and Education, Research Center for Zoonosis Control, Hokkaido University, Kita 20, Nishi 10, Kita-ku, Sapporo, Hokkaido, 001-0020, Japan.
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Rar VA, Epikhina TI, Suntsova OV, Kozlova IV, Lisak OV, Pukhovskaya NM, Vysochina NP, Ivanov LI, Tikunova NV. Genetic variability of Babesia parasites in Haemaphysalis spp. and Ixodes persulcatus ticks in the Baikal region and Far East of Russia. INFECTION GENETICS AND EVOLUTION 2014; 28:270-5. [PMID: 25460820 DOI: 10.1016/j.meegid.2014.10.010] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2014] [Revised: 08/22/2014] [Accepted: 10/12/2014] [Indexed: 10/24/2022]
Abstract
To study Babesia diversity in Ixodid ticks in Russia, Ixodes persulcatus, Haemaphysalis japonica, Haemaphysalisconcinna, Dermacentor silvarum, and Dermacentor nuttalli ticks collected in the Far East and Baikal region were assayed for the presence of Babesia spp. using nested PCR. In total, Babesia DNA was detected in 30 of the 1125 (2.7%) I. persulcatus, 17 of the 573 (3.0%) H. concinna, and 12 of the 543 (2.2%) H. japonica but was undetectable in any of the 294 analyzed Dermacentor spp. Partial 18S rRNA gene sequences were determined for all of the positive samples. Among the positive ticks, nine I. persulcatus were infected by Babesia microti 'US'-type, five I. persulcatus were infected by Babesia divergens-like parasites, and 11 I. persulcatus were infected by Babesia venatorum. For all three of these species, the determined 18S rRNA gene sequences were identical to those of the Babesia genetic variants found previously in I. persulcatus in Russia. In addition, five I. persulcatus from the Baikal region and all of the positive Haemaphysalis spp. ticks carried 13 different sequence variants of Babesia sensu stricto belonging to distinct phylogenetic clusters. Babesia spp. from 29 ticks of different species collected in distinct locations belonged to the cluster of cattle and ovine parasites (Babesia crassa, Babesiamajor, Babesiamotasi, Babesiabigemina, etc.). Babesia spp. from four H. japonica ticks in the Far East belonged to the cluster formed by parasites of carnivores. One more Babesia sequence variant detected in an I. persulcatus tick from the Baikal region belonged to the cluster formed by parasites of cattle and wild cervids (B. divergens, Babesiacapreoli, B. venatorum, Babesiaodocoilei, etc.).
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Affiliation(s)
- V A Rar
- Institute of Chemical Biology and Fundamental Medicine, SB RAS, Novosibirsk, Russian Federation.
| | - T I Epikhina
- Institute of Chemical Biology and Fundamental Medicine, SB RAS, Novosibirsk, Russian Federation
| | - O V Suntsova
- Scientific Center of Family Health and Human Reproduction Problems, SB RAMS, Irkutsk, Russian Federation
| | - I V Kozlova
- Scientific Center of Family Health and Human Reproduction Problems, SB RAMS, Irkutsk, Russian Federation
| | - O V Lisak
- Scientific Center of Family Health and Human Reproduction Problems, SB RAMS, Irkutsk, Russian Federation
| | - N M Pukhovskaya
- Khabarovsk Antiplague Station, Khabarovsk, Russian Federation
| | - N P Vysochina
- Khabarovsk Antiplague Station, Khabarovsk, Russian Federation
| | - L I Ivanov
- Khabarovsk Antiplague Station, Khabarovsk, Russian Federation
| | - N V Tikunova
- Institute of Chemical Biology and Fundamental Medicine, SB RAS, Novosibirsk, Russian Federation
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Hong SH, Lee SE, Jeong YI, Kim HC, Chong ST, Klein TA, Song JW, Gu SH, Cho SH, Lee WJ. Prevalence and molecular characterizations of Toxoplasma gondii and Babesia microti from small mammals captured in Gyeonggi and Gangwon Provinces, Republic of Korea. Vet Parasitol 2014; 205:512-7. [PMID: 25178555 DOI: 10.1016/j.vetpar.2014.07.032] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2014] [Revised: 07/28/2014] [Accepted: 07/30/2014] [Indexed: 10/24/2022]
Abstract
A survey was conducted to determine the distribution and prevalence of Toxoplasma gondii and Babesia microti infections in small mammals captured in Gyeonggi and Gangwon Provinces, Republic of Korea (ROK). The serological prevalence of T. gondii (ELISA) and B. microti (IFAT) was 2.3% (15/667) and 2.1% (14/667), respectively. DNA extracts from small mammal heart tissues were screened by PCR for T. gondii and B. microti targeting regions of the GRA5 gene and the 18S rRNA and β-tubulin genes, respectively. Only 0.17% (1/578) of Apodemus agrarius was positive of T. gondii by PCR, while 0.52% (3/578) was positive of B. microti. All other small mammal species [Micromys minutus (16), Mus musculus (3), Myodes regulus (22), Microtus fortis (6), and Crocidura lasiura (42)] were negative for both T. gondii and B. microti. Based on sequence polymorphism and phylogenetic analysis, T. gondii closely aligned with Type I, a highly virulent strain, while B. microti positive samples closely aligned with US-type B. microti and others observed in the ROK, Russia, and Japan. These results indicate that A. agrarius is a reservoir for both T. gondii and B. microti in the ROK.
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Affiliation(s)
- Sung-Hee Hong
- Division of Malaria & Parasite Diseases, Korea National Institute of Health, Korea Centers for Disease Control and Prevention, 187 Osongsaengmyeong2-ro, Osong-up, Cheongwon-gun, Chungbuk Province 363-951, Republic of Korea
| | - Sang-Eun Lee
- Division of Malaria & Parasite Diseases, Korea National Institute of Health, Korea Centers for Disease Control and Prevention, 187 Osongsaengmyeong2-ro, Osong-up, Cheongwon-gun, Chungbuk Province 363-951, Republic of Korea
| | - Young-Il Jeong
- Division of Malaria & Parasite Diseases, Korea National Institute of Health, Korea Centers for Disease Control and Prevention, 187 Osongsaengmyeong2-ro, Osong-up, Cheongwon-gun, Chungbuk Province 363-951, Republic of Korea
| | - Heung-Chul Kim
- 5th Medical Detachment, 168th Multifunctional Medical Battalion, 65th Medical Brigade, Unit 15247, APO AP 96205-5247, USA
| | - Sung-Tae Chong
- 5th Medical Detachment, 168th Multifunctional Medical Battalion, 65th Medical Brigade, Unit 15247, APO AP 96205-5247, USA
| | - Terry A Klein
- Public Health Command Region-Pacific, Camp Zama, Japan, 65th Medical Brigade, Unit 15281, APO AP 96205-5281, USA
| | - Jin-Won Song
- Department of Microbiology, College of Medicine, Korea University, Seoul 136-705, Republic of Korea
| | - Se Hun Gu
- Department of Microbiology, College of Medicine, Korea University, Seoul 136-705, Republic of Korea; Pacific Center for Emerging Infectious Diseases Research, John A. Burns School of Medicine, University of Hawaii at Manoa, 651 Ilalo Street, Honolulu, HI 96813, USA
| | - Shin-Hyeong Cho
- Division of Malaria & Parasite Diseases, Korea National Institute of Health, Korea Centers for Disease Control and Prevention, 187 Osongsaengmyeong2-ro, Osong-up, Cheongwon-gun, Chungbuk Province 363-951, Republic of Korea
| | - Won-Ja Lee
- Division of Malaria & Parasite Diseases, Korea National Institute of Health, Korea Centers for Disease Control and Prevention, 187 Osongsaengmyeong2-ro, Osong-up, Cheongwon-gun, Chungbuk Province 363-951, Republic of Korea.
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29
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Emergence of human babesiosis along the border of China with Myanmar: detection by PCR and confirmation by sequencing. Emerg Microbes Infect 2014; 3:e55. [PMID: 26038750 PMCID: PMC4150284 DOI: 10.1038/emi.2014.55] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2014] [Revised: 04/17/2014] [Accepted: 06/13/2014] [Indexed: 12/17/2022]
Abstract
Babesiosis is a tick-borne, zoonotic disease caused by Babesia spp. Two cases of babesiosis were detected by nested polymerase chain reaction (PCR) in Yunnan province, China, and further confirmed by molecular assay. The blood smears showed intraerythrocytic ring form and tetrads typical of small B. microti. In both cases, the rapid diagnostic test (RDT) ruled out the possibility of co-infections with malaria. Neither case was initially diagnosed because of the low Babesia parasitemia. These two cases of babesiosis in areas along the Myanmar–China border pose the question of the emergence of this under recognized infection in countries or areas where malaria is endemic.
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Vudriko P, Masatani T, Cao S, Terkawi MA, Kamyingkird K, Mousa AA, Adjou Moumouni PF, Nishikawa Y, Xuan X. Molecular and Kinetic Characterization of Babesia microti Gray Strain Lactate Dehydrogenase as a Potential Drug Target. Drug Target Insights 2014; 8:31-8. [PMID: 25125971 PMCID: PMC4125376 DOI: 10.4137/dti.s16504] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2014] [Revised: 05/27/2014] [Accepted: 06/03/2014] [Indexed: 01/09/2023] Open
Abstract
Babesia microti is an emerging zoonotic protozoan organism that causes “malaria-like” symptoms that can be fatal in immunocompromised people. Owing to lack of specific therapeutic regiment against the disease, we cloned and characterized B. microti lactate dehydrogenase (BmLDH) as a potential molecular drug receptor. The in vitro kinetic properties of BmLDH enzyme was evaluated using nicotinamide adenine dinucleotide (NAD+) as a co-factor and lactate as a substrate. Inhibitory assay was also done using gossypol as BmLDH inhibitor to determine the inhibitory concentration 50 (IC50). The result showed that the 0.99 kbp BmLDH gene codes for a barely soluble 36 kDa protein (332 amino acids) localized in both the cytoplasm and nucleus of the parasite. In vitro enzyme kinetic studies further revealed that BmLDH is an active enzyme with a high catalytic efficiency at optimal pH of 10.2. The Km values of NAD+ and lactate were 8.7 ± 0.57 mM and 99.9 ± 22.33 mM, respectively. The IC50 value for gossypol was 0.345 μM, while at 2.5 μM, gossypol caused 100% inhibition of BmLDH catalytic activity. These findings, therefore, provide initial evidence that BmLDH could be a potential drug target, although further in vivo studies are needed to validate the practical application of lactate dehydrogenase inhibitors against B. microti infection.
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Affiliation(s)
- Patrick Vudriko
- National Research Center for Protozoan Diseases (NRCPD), Obihiro University of Agriculture and Veterinary Medicine, Inada-cho, Obihiro, Hokkaido, Japan. ; Department of Veterinary Pharmacy, Clinics and Comparative Medicine, College of Veterinary Medicine, Animal Resources and Biosecurity, Makerere University, Kampala, Uganda
| | - Tatsunori Masatani
- National Research Center for Protozoan Diseases (NRCPD), Obihiro University of Agriculture and Veterinary Medicine, Inada-cho, Obihiro, Hokkaido, Japan
| | - Shinuo Cao
- National Research Center for Protozoan Diseases (NRCPD), Obihiro University of Agriculture and Veterinary Medicine, Inada-cho, Obihiro, Hokkaido, Japan
| | - Mohamad Alla Terkawi
- National Research Center for Protozoan Diseases (NRCPD), Obihiro University of Agriculture and Veterinary Medicine, Inada-cho, Obihiro, Hokkaido, Japan
| | - Ketsarin Kamyingkird
- National Research Center for Protozoan Diseases (NRCPD), Obihiro University of Agriculture and Veterinary Medicine, Inada-cho, Obihiro, Hokkaido, Japan
| | - Ahmed A Mousa
- National Research Center for Protozoan Diseases (NRCPD), Obihiro University of Agriculture and Veterinary Medicine, Inada-cho, Obihiro, Hokkaido, Japan
| | - Paul F Adjou Moumouni
- National Research Center for Protozoan Diseases (NRCPD), Obihiro University of Agriculture and Veterinary Medicine, Inada-cho, Obihiro, Hokkaido, Japan
| | - Yoshifumi Nishikawa
- National Research Center for Protozoan Diseases (NRCPD), Obihiro University of Agriculture and Veterinary Medicine, Inada-cho, Obihiro, Hokkaido, Japan
| | - Xuenan Xuan
- National Research Center for Protozoan Diseases (NRCPD), Obihiro University of Agriculture and Veterinary Medicine, Inada-cho, Obihiro, Hokkaido, Japan
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31
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Yabsley MJ, Shock BC. Natural history of Zoonotic Babesia: Role of wildlife reservoirs. Int J Parasitol Parasites Wildl 2013; 2:18-31. [PMID: 24533312 PMCID: PMC3862492 DOI: 10.1016/j.ijppaw.2012.11.003] [Citation(s) in RCA: 157] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2012] [Revised: 10/25/2012] [Accepted: 11/06/2012] [Indexed: 11/02/2022]
Abstract
Babesiosis is an emerging zoonotic disease on all inhabited continents and various wildlife species are the principal reservoir hosts for zoonotic Babesia species. The primary vectors of Babesia are Ixodid ticks, with the majority of zoonotic species being transmitted by species in the genus Ixodes. Species of Babesia vary in their infectivity, virulence and pathogenicity for people. Various factors (e.g., increased interactions between people and the environment, increased immunosuppression, changes in landscape and climate, and shifts in host and vector species abundance and community structures) have led to an increase in tick-borne diseases in people, including babesiosis. Furthermore, because babesiosis is now a reportable disease in several states in the United States, and it is the most common blood transfusion-associated parasite, recognized infections are expected to increase. Because of the zoonotic nature of these parasites, it is essential that we understand the natural history (especially reservoirs and vectors) so that appropriate control and prevention measures can be implemented. Considerable work has been conducted on the ecology of Babesia microti and Babesia divergens, the two most common causes of babesiosis in the United States and Europe, respectively. However, unfortunately, for many of the zoonotic Babesia species, the reservoir(s) and/or tick vector(s) are unknown. We review the current knowledge regarding the ecology of Babesia among their reservoir and tick hosts with an emphasis of the role on wildlife as reservoirs. We hope to encourage the molecular characterization of Babesia from potential reservoirs and vectors as well from people. These data are necessary so that informed decisions can be made regarding potential vectors and the potential role of wildlife in the ecology of a novel Babesia when it is detected in a human patient.
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Affiliation(s)
- Michael J. Yabsley
- Corresponding author. Address: The Southeastern Cooperative Wildlife Disease Study, Department of Population Health, 589 DW Brooks Drive, College of Veterinary Medicine, University of Georgia, Athens, GA 30602, USA. Tel.: +1 706 542 1741; fax: +1 706 542 5865.
| | - Barbara C. Shock
- Daniel B. Warnell School of Forestry and Natural Resources, University of Georgia, Athens, GA 30602, USA
- The Southeastern Cooperative Wildlife Disease Study, Department of Population Health, College of Veterinary Medicine, University of Georgia, Athens, GA 30602, USA
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32
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Saito-Ito A, Kasahara M, Kasai M, Dantrakool A, Kawai A, Fujita H, Yano Y, Kawabata H, Takada N. Survey ofBabesia microtiInfection in Field Rodents in Japan: Records of the Kobe-Type in New Foci and Findings of a New Type Related to the Otsu-Type. Microbiol Immunol 2013; 51:15-24. [PMID: 17237595 DOI: 10.1111/j.1348-0421.2007.tb03886.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Of 247 rodents comprising 5 genera and 7 species collected at 17 sites throughout Japan from 2003 to 2005, Babesia microti was detected microscopically and by polymerase chain reaction (PCR) in 36 rodents comprising 2 genera and 3 species from 12 sites. Based on the analysis of small subunit ribosomal RNA gene (SSUrDNA) sequences, the Kobe-type, the etiological type of the first Japanese case of human infection was found in Apodemus speciosus and Apodemus argenteus in Aomori, the northernmost prefecture of the Japanese mainland, while the U.S.-type was found on Hokkaido Island and the Otsu-type was widely distributed. In addition, a new Otsu-related type was detected exclusively in Eothenomys andersoni in Nagano, a prefecture in central Japan. The sequences of internal transcribed spacer 1 to 2 (ITS1/2) of the present Kobe- and Otsu-types were almost identical to those of the same types previously identified. The ITS1/2 sequence of the U.S.-type identified in Hokkaido in this survey was somewhat different from that of the U.S.-type strain originating from the U.S.A., with approximately 95% identity. This value was similar to the 94% identity found between the ITS1/2 sequences of the Otsu-type and the new Otsu-related type. The new Otsu-related type of B. microti was isolated as the Nagano strain, which was serologically differentiated from the other type strains of B. microti. The divergence and distribution of genotypes are important factors in investigating the epidemiology of human B. microti infection in Japan.
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MESH Headings
- Animals
- Babesia microti/classification
- Babesia microti/genetics
- Babesia microti/isolation & purification
- Babesiosis/epidemiology
- Babesiosis/parasitology
- Babesiosis/veterinary
- Cricetinae
- DNA, Intergenic/analysis
- DNA, Intergenic/chemistry
- DNA, Intergenic/genetics
- DNA, Protozoan/analysis
- DNA, Protozoan/chemistry
- DNA, Protozoan/genetics
- DNA, Ribosomal/analysis
- DNA, Ribosomal/chemistry
- DNA, Ribosomal/genetics
- Japan/epidemiology
- Molecular Epidemiology
- Molecular Sequence Data
- Phylogeny
- Polymerase Chain Reaction
- Rodent Diseases/epidemiology
- Rodent Diseases/parasitology
- Rodentia
- Sequence Analysis, DNA
- Sequence Homology, Nucleic Acid
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Affiliation(s)
- Atsuko Saito-Ito
- Section of Parasitology, Division of Microbiology, Kobe University Graduate School of Medicine, Japan.
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33
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Detection of tick-borne pathogens in roe deer (Capreolus capreolus), in questing ticks (Ixodes ricinus), and in ticks infesting roe deer in southern Germany. Ticks Tick Borne Dis 2013; 4:320-8. [DOI: 10.1016/j.ttbdis.2013.01.004] [Citation(s) in RCA: 88] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2012] [Revised: 01/09/2013] [Accepted: 01/13/2013] [Indexed: 01/20/2023]
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Hersh MH, Tibbetts M, Strauss M, Ostfeld RS, Keesing F. Reservoir competence of wildlife host species for Babesia microti. Emerg Infect Dis 2013; 18:1951-7. [PMID: 23171673 PMCID: PMC3557901 DOI: 10.3201/eid1812.111392] [Citation(s) in RCA: 84] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Competence data will aid understanding of the spread of human babesiosis. Human babesiosis is an increasing health concern in the northeastern United States, where the causal agent, Babesia microti, is spread through the bite of infected Ixodes scapularis ticks. We sampled 10 mammal and 4 bird species within a vertebrate host community in southeastern New York to quantify reservoir competence (mean percentage of ticks infected by an individual host) using real-time PCR. We found reservoir competence levels >17% in white-footed mice (Peromyscus leucopus), raccoons (Procyon lotor), short-tailed shrews (Blarina brevicauda), and eastern chipmunks (Tamias striatus), and <6% but >0% in all other species, including all 4 bird species. Data on the relative contributions of multiple host species to tick infection with B. microti and level of genetic differentiation between B. microti strains transmitted by different hosts will help advance understanding of the spread of human babesiosis.
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35
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Hirata H, Ishinabe S, Jinnai M, Asakawa M, Ishihara C. Molecular Characterization and Phylogenetic Analysis ofBabesiasp. NV-1 Detected from Wild American Mink (Neovison vison) in Hokkaido, Japan. J Parasitol 2013; 99:350-2. [DOI: 10.1645/ge-3185.1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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36
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Schnittger L, Rodriguez AE, Florin-Christensen M, Morrison DA. Babesia: a world emerging. INFECTION GENETICS AND EVOLUTION 2012; 12:1788-809. [PMID: 22871652 DOI: 10.1016/j.meegid.2012.07.004] [Citation(s) in RCA: 382] [Impact Index Per Article: 31.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2012] [Revised: 07/06/2012] [Accepted: 07/08/2012] [Indexed: 11/15/2022]
Abstract
Babesia are tick-transmitted hemoprotozooans that infect mammals and birds, and which are acknowledged for their major impact on farm and pet animal health and associated economic costs worldwide. Additionally, Babesia infections of wildlife can be fatal if associated with stressful management practices; and human babesiosis, also transmitted by blood transfusion, is an increasing public-health concern. Due to the huge diversity of species reported to serve as Babesia hosts, all vertebrates might be potential carriers, as long as they are adequate hosts for Babesia-vector ticks. We here provide a comprehensive overview of the most relevant Babesia species, and a discussion of the classical taxonomic criteria. Babesia, Cytauxzoon and Theileria parasites are closely related and collectively referred to as piroplasmids. A possible scenario for the history of piroplasmids is presented in the context of recent findings, and its implications for future research avenues are outlined. Phylogenetic trees of all available 18S rRNA and hsp70 genes were generated, based on which we present a thoroughly revised molecular classification, comprising five monophyletic Babesia lineages, one Cytauxzoon clade, and one Theileria clade. Updated 18S rRNA and beta-tubulin gene trees of the B. microti isolates agree with those previously reported. To reconcile estimates of the origin of piroplasmids and ticks (~300 Ma, respectively), and mammalian radiation (60 Ma), we hypothesize that the dixenous piroplasmid life cycle evolved with the origin of ticks. Thus, the observed time gap between tick origin and mammalian radiation indicates the existence of hitherto unknown piroplasmid lineages and/or species in extant vertebrate taxa, including reptiles and possibly amphibians. The development and current status of the molecular taxonomy of Babesia, with emphasis on human-infecting species, is discussed. Finally, recent results from population genetic studies of Babesia parasites, and their implications for the development of pathogenicity, drug resistance and vaccines, are summarized.
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Affiliation(s)
- Leonhard Schnittger
- Institute of Pathobiology, Center of Research in Veterinary and Agronomic Sciences, INTA-Castelar, Argentina.
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37
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Detection of two zoonotic Babesia microti lineages, the Hobetsu and U.S. lineages, in two sympatric tick species, ixodes ovatus and Ixodes persulcatus, respectively, in Japan. Appl Environ Microbiol 2012; 78:3424-30. [PMID: 22389378 DOI: 10.1128/aem.00142-12] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The species Babesia microti, commonly found in rodents, demonstrates a high degree of genetic diversity. Three lineages, U.S., Kobe, and Hobetsu, are known to have zoonotic potential, but their tick vector(s) in Japan remains to be elucidated. We conducted a field investigation at Nemuro on Hokkaido Island and at Sumoto on Awaji Island, where up to two of the three lineages occur with similar frequencies in reservoirs. By flagging vegetation at these spots and surrounding areas, 4,010 ticks, comprising six species, were collected. A nested PCR that detects the 18S rRNA gene of Babesia species revealed that Ixodes ovatus and I. persulcatus alone were positive. Lineage-specific PCR for rRNA-positive samples demonstrated that I. ovatus and I. persulcatus carried, respectively, the Hobetsu and U.S. parasites. No Kobe-specific DNA was detected. Infected I. ovatus ticks were found at multiple sites, including Nemuro and Sumoto, with minimum infection rates (MIR) of ∼12.3%. However, all I. persulcatus ticks collected within the same regions, a total of 535, were negative for the Hobetsu lineage, indicating that I. ovatus, but not I. persulcatus, was the vector for the lineage. At Nemuro, U.S. lineage was detected in 2 of 139 adult I. persulcatus ticks (MIR, 1.4%), for the first time, while 48 of I. ovatus ticks were negative for that lineage. Laboratory experiments confirmed the transmission of Hobetsu and U.S. parasites to hamsters via I. ovatus and I. persulcatus, respectively. Differences in vector capacity shown by MIRs at Nemuro, where the two species were equally likely to acquire either lineage of parasite, may explain the difference in distribution of Hobetsu throughout Japan and U.S. taxa in Nemuro. These findings are of importance in the assessment of the regional risk for babesiosis in humans.
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38
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Hirata H, Kawai S, Maeda M, Jinnai M, Fujisawa K, Katakai Y, Hikosaka K, Tanabe K, Yasutomi Y, Ishihara C. Identification and phylogenetic analysis of Japanese Macaque Babesia-1 (JM-1) detected from a Japanese Macaque (Macaca fuscata fuscata). Am J Trop Med Hyg 2011; 85:635-8. [PMID: 21976563 DOI: 10.4269/ajtmh.2011.11-0035] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
We demonstrate here the identification and phylogenetic characterization of Babesia microti (B. microti)-like parasite detected from a splenectomized Japanese macaque (Macaca fuscata fuscata) at a facility for laboratory animal science. On Day 133 after splenectomy, intra-erythrocytic parasites were found on light microscopic examination, and the level of parasitemia reached 0.3% on blood smear. Molecular characterization of the parasite using nested-polymerization chain reactions targeting the 18S rRNA, β-tubulin, and subunit 7 (eta) of the chaperonin-containing t-complex polypeptide 1 (CCT7) genes were identified as a B. microti-like parasite, designated the Japanese Macaque Babesia-1 (JM-1).
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Affiliation(s)
- Haruyuki Hirata
- School of Veterinary Medicine, Rakuno Gakuen University, Ebetsu, Japan.
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39
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Ohmori S, Kawai A, Takada N, Saito-Ito A. Development of real-time PCR assay for differential detection and quantification for multiple Babesia microti-genotypes. Parasitol Int 2011; 60:403-9. [PMID: 21723958 DOI: 10.1016/j.parint.2011.06.021] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2011] [Revised: 05/25/2011] [Accepted: 06/20/2011] [Indexed: 10/18/2022]
Abstract
We have developed a real-time PCR assay that can rapidly and differentially detect and quantify four genotypes of small subunit ribosomal RNA gene (SSUrDNA) of Babesia microti (Kobe-, Otsu-, Nagano- and US-types). In this assay, four genotype-specific pairs of primers targeted on internal transcribed spacer (ITS) 1 or 2 sequences were used and amplicons by each pair of primers were quantitatively detected by fluorescent SYBR Green I. The four genotype-specific pairs of primers displayed the high specificity for homologous genotype DNA. The standard curves of cycle threshold (Ct) values versus amount of target DNA per reaction (log) for all four genotypes were linear and the correlation coefficient (Rsq) values for the curves were from 0.970 to 0.997. The standard curves were almost identical even in the presence of heterologous genotype DNA. This assay could detect 10-30 fg purified DNA (equivalent to the amount of 1-5 parasite DNA) of each genotype B. microti. This assay could also detect each genotype B. microti infection in blood with 3×10(-6)%-1×10(-5)% parasitemia. This assay was applicable to field rodent and tick samples to reveal mixed infection in several samples, for which a single genotype of B. microti had been detected by direct sequencing analyses in our previous studies. This assay also seemed to be applicable to clinical human samples, showing Kobe-type positive results for the first Japanese babesiosis patient and the asymptomatic donor, both infected with Kobe-type B. microti.
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Affiliation(s)
- Shiho Ohmori
- Department of Pharmacy, School of Pharmacy, Hyogo University of Health Sciences, Kobe, Hyogo, Japan
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Samokhvalov MV, Kovalevskii YV, Korenberg EI, Morozov AV, Kuzikov IV, Sheftel’ BI. Small mammals as potential reservoir hosts of Babesia microti in the Middle Urals. BIOL BULL+ 2010. [DOI: 10.1134/s1062359010070113] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Jinnai M, Kawabuchi-Kurata T, Tsuji M, Nakajima R, Hirata H, Fujisawa K, Shiraki H, Asakawa M, Nasuno T, Ishihara C. Molecular evidence of the multiple genotype infection of a wild Hokkaido brown bear (Ursus arctos yesoensis) by Babesia sp. UR1. Vet Parasitol 2010; 173:128-33. [DOI: 10.1016/j.vetpar.2010.06.018] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2009] [Revised: 05/19/2010] [Accepted: 06/21/2010] [Indexed: 11/24/2022]
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Rar VA, Epikhina TI, Livanova NN, Panov VV, Pukhovskaya NM, Vysochina NP, Ivanov LI. Detection of Babesia DNA in small mammals and ixodid ticks in the North Urals, Western Siberia, and Far East of Russia. MOLECULAR GENETICS MICROBIOLOGY AND VIROLOGY 2010. [DOI: 10.3103/s0891416810030055] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Maamun JM, Suleman MA, Akinyi M, Ozwara H, Kariuki T, Carlsson HE. Prevalence of Babesia microti in free-ranging baboons and African green monkeys. J Parasitol 2010; 97:63-7. [PMID: 21348608 DOI: 10.1645/ge-2391.1] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Babesia microti-like parasites have been reported to infect captive non-human primates (NHPs). However, studies on the prevalence of Babesia spp. in free-ranging NHPs are lacking. This investigation aimed at determining the prevalence of B. microti in wild-caught Kenyan NHPs. In total, 125 animals were studied, including 65 olive baboons (Papio cynocephalus anubis) and 60 African green monkeys ([AGMs] Chlorocebus aethiops). Nested polymerase chain reaction targeting Babesia β-tubulin genes was used to diagnose infection prevalence. Results indicated a prevalence of 22% (27/125) B. microti infection in free-ranging NHPs in Kenya. There was no statistically significant difference in B. microti infection prevalence between baboons and AGMs or male and female animals. This is the first report of the presence and prevalence of B. microti in free-ranging Kenyan NHPs.
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Affiliation(s)
- Jeneby M Maamun
- Department of Tropical and Infectious Diseases, Institute of Primate Research, National Museums of Kenya, PO Box 24481-00502 Karen, Nairobi, Kenya.
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Genetic diversity ofBabesiainIxodes persulcatusand small mammals from North Ural and West Siberia, Russia. Parasitology 2010; 138:175-82. [DOI: 10.1017/s0031182010001162] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
SUMMARYObjective.The aim of this work was to study the prevalence and genetic diversity ofBabesiainIxodes persulcatusticks and small mammals from Ural and Siberia in Russia.Methods.In total, 481 small mammals and 922 questing adultI. persulcatusfrom North Ural (Sverdlovsk region) and West Siberia (Novosibirsk region) were examined for the presence ofBabesiaby nested PCR based on the 18S rRNA gene.Results.Babesia microtiof the ‘Munich’-type was found in 36·2% of blood samples of the small mammals from the Sverdlovsk region andB. microtiof the ‘US’-type in 5·3% of the animals from the Novosibirsk region.BabesiaDNA was not detected in 133 analysedI. persulcatusfrom the Sverdlovsk region; however, it was found in 24 of 789 ticks from the Novosibirsk region. Three distinctBabesiaspecies were detected inI. persulcatus. B. microti‘US’-type was identified in 10 ticks,Babesiaclosely related toB. divergens/B. capreoliin 2 ticks, andBabesiaclosely related toB. venatorum(EU1) in 12 ticks.Conclusion.To our knowledge, this is the first detection ofBabesia sensu strictoinI. persulcatusticks and ofB. microtiinI. persulcatusin the Asian part of Russia.
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Chausov EV, Ternovoi VA, Protopopova EV, Konovalova SN, Kononova YV, Pershikova NL, Moskvitina NS, Romanenko VN, Ivanova NV, Bolshakova NP, Moskvitin SS, Korobitsin IG, Gashkov SI, Tiutenkov OY, Kuranova VN, Kravchenko LB, Suchkova NG, Agulova LP, Loktev VB. Genetic diversity of tick-borne pathogenes in Tomsk and environs. ACTA ACUST UNITED AC 2010. [DOI: 10.1134/s0013873810020090] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Gray J, Zintl A, Hildebrandt A, Hunfeld KP, Weiss L. Zoonotic babesiosis: overview of the disease and novel aspects of pathogen identity. Ticks Tick Borne Dis 2009; 1:3-10. [PMID: 21771506 DOI: 10.1016/j.ttbdis.2009.11.003] [Citation(s) in RCA: 178] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2009] [Revised: 11/12/2009] [Accepted: 11/17/2009] [Indexed: 10/19/2022]
Abstract
Babesiosis is a zoonosis caused by tick-transmitted intraerythrocytic protozoa of the Phylum Apicomplexa. The disease mostly occurs in the USA, but cases have also been reported in several European countries, in Egypt, India, Japan, Korea, Taiwan, and South Africa. The main pathological event is lysis of erythrocytes resulting in haemolytic anaemia, which in severe cases may lead to organ failure and death, particularly in immunocompromised patients. The 2 groups of parasites involved, Babesia microti-like and Babesia sensu stricto (s.s.) species, differ in their life cycle characteristics and susceptibility to antibabesial drugs. Molecular taxonomy is now making a major contribution to the identification of novel pathogens within both groups. Effective treatment of severe cases was initially hampered by the lack of specific antibabesial drugs for human use, but increased use of supportive measures and of the recently developed antimalarial, atovaquone, particularly in combination with azithromycin, has improved the prospects for management of acute disease especially when caused by Babesia s.s. species. Prevention should be based primarily on increasing the awareness of physicians and the public to the risks, but infection from blood transfusions is particularly difficult to prevent. Expanding deer populations, resulting in wider distribution and greater abundance of ticks, heightened medical awareness, and growing numbers of immunocompromised patients are likely to result in a continuing rise of reported cases.
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Affiliation(s)
- Jeremy Gray
- UCD School of Biology and Environmental Science, University College Dublin, Belfield, Dublin 4, Ireland.
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Meerburg BG, Singleton GR, Kijlstra A. Rodent-borne diseases and their risks for public health. Crit Rev Microbiol 2009; 35:221-70. [DOI: 10.1080/10408410902989837] [Citation(s) in RCA: 455] [Impact Index Per Article: 30.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Nakajima R, Tsuji M, Oda K, Zamoto-Niikura A, Wei Q, Kawabuchi-Kurata T, Nishida A, Ishihara C. Babesia microti-group parasites compared phylogenetically by complete sequencing of the CCTeta gene in 36 isolates. J Vet Med Sci 2009; 71:55-68. [PMID: 19194077 DOI: 10.1292/jvms.71.55] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Babesia microti, the erythroparasitic cause of human babesiosis, has long been taken to be a single species because classification by parasite morphology and host spectrum blurred distinctions between the parasites. Phylogenetic analyses of the 18S ribosomal RNA gene (18S rDNA) and, more recently, the beta-tubulin gene have suggested inter-group heterogeneity. Intra-group relationships, however, remain unknown. This study was conducted to clarify the intra- and inter-group phylogenetic features of the B. microti-group parasites with the eta subunit of the chaperonin-containing t-complex polypeptide l (CCTeta) gene as a candidate genetic marker for defining the B. microti group. We prepared complete sequences of the CCTeta gene from 36 piroplasms and compared the phylogenetic trees. The B. microti-group parasites clustered in a monophyletic assemblage separate from the Babesia sensu stricto and Theileria genera and subdivided predominantly into 4 clades (U.S., Kobe, Hobetsu, Munich) with highly significant evolutionary distances between the clades. B. rodhaini branched at the base of the B. microti-group parasites. In addition, a unique intron presence/absence matrix not observable in 18S rDNA or beta-tubulin set the B. microti group entirely apart from either Babesia sensu stricto or Theileria. These results have strong implications for public health, suggesting that the B. microti-group parasites are a full-fledged genus comprising, for now, four core species, i.e., U.S., Kobe, Hobetsu, and Munich species nova. Furthermore, the CCTeta gene is an instructive and definitive genetic marker for analyzing B. microti and related parasites.
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Affiliation(s)
- Rui Nakajima
- School of Veterinary Medicine, Rakuno Gakuen University, 582-1 Bunkyodai Midorimachi, Ebetsu, Japan
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Jinnai M, Kawabuchi-Kurata T, Tsuji M, Nakajima R, Fujisawa K, Nagata S, Koide H, Matoba Y, Asakawa M, Takahashi K, Ishihara C. Molecular evidence for the presence of new Babesia species in feral raccoons (Procyon lotor) in Hokkaido, Japan. Vet Parasitol 2009; 162:241-7. [PMID: 19349121 DOI: 10.1016/j.vetpar.2009.03.016] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2008] [Revised: 02/24/2009] [Accepted: 03/03/2009] [Indexed: 11/29/2022]
Abstract
We recently reported that feral raccoons (Procyon lotor) with splenomegaly native to Japan were carriers of a Babesia microti-like parasite identical to that found in the United States, which was likely introduced to Japan from North America via raccoons imported as pets. Thus, we attempted extensive molecular survey for piroplasma infections of feral raccoon with normal spleen in Hokkaido, Japan using nested PCR that target broadly to 18S ribosomal RNA gene (SSU-rDNA) of all the parasites in the genus Babesia, Theileria, Cytauxzoon and B. microti group. Of the 348 raccoon samples analyzed, 9 gave positive signals. Cloning and phylogenetic analysis on SSU-rDNA sequences revealed that six of nine positives were found to be infected with Babesia and the remaining three with previously unreported Sarcocystis. Babesia sequences were further separated into two distantly related groups, those that reside in a novel phylogenetic group were consisted solely of four parasites found in this study, while those which included one identical sequence found in the three of our specimens were assembled together with both Babesia parasites of tick's in Japan and of raccoon's in U.S. These results may indicate that not only a B. microti-like parasite but also at least two yet undescribed Babesia species are being established in their new life cycles in the feral raccoon populations in Japan.
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Affiliation(s)
- Michio Jinnai
- School of Veterinary Medicine, Rakuno-Gakuen University, Ebetsu, Hokkaido 069-8501, Japan
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Gimenez C, Casado N, Criado-Fornelio A, de Miguel FA, Dominguez-Peñafiel G. A molecular survey of Piroplasmida and Hepatozoon isolated from domestic and wild animals in Burgos (northern Spain). Vet Parasitol 2009; 162:147-50. [PMID: 19297099 DOI: 10.1016/j.vetpar.2009.02.021] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2008] [Revised: 02/09/2009] [Accepted: 02/16/2009] [Indexed: 10/21/2022]
Abstract
This study reports a molecular survey of Hepatozoon species and of the order Piroplasmida in the Province of Burgos, northern Spain. The diagnostic techniques employed included PCR and the sequencing of the 18S rRNA gene. Eighty-nine blood samples from domestic animals plus 138 blood/coagulated blood samples from wild mammals were examined. Theilerid protozoa were found at relatively high frequencies in bovines (14.6%) and horses (36%). Theileria buffeli, T. sergenti and T. annulata were diagnosed in cows. T. equi was common in horses and T. annae was found in a donkey for the first time. A new piroplasmid was found in the European badger (20%). This appears to be distantly related to both T. annae and a piroplasmid isolated from Lontra canadensis. A moderate prevalence (14%) for T. annae was recorded in red foxes. A species of hepatozoon was found in one bank vole (17%), while 28% of the red foxes examined were found to be infected with H. canis. Twenty-five wild house mice were studied and found not to be carriers of piroplasmids or Hepatozoon species. Wild boars, roe deer, hares, Apodemus sp. and moles were also negative for haematozoan infection. The present study indicates that piroplasmid protozoa are present at a low to moderate frequency in some domestic herbivores in the Burgos area. They also infect certain wild mammalian species, which may act as zoonotic carriers.
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Affiliation(s)
- Consuelo Gimenez
- Departamento de Microbiología y Parasitología, Facultad de Farmacia, Universidad de Alcalá, Crta. Madrid-Barcelona, Km. 33,600, 28871 Alcalá de Henares, Spain
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