1
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Zhao Y, Zhang WY, Wang RL, Niu DL. Divergent domains of 28S ribosomal RNA gene: DNA barcodes for molecular classification and identification of mites. Parasit Vectors 2020; 13:251. [PMID: 32404192 PMCID: PMC7222323 DOI: 10.1186/s13071-020-04124-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Accepted: 05/06/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The morphological and molecular identification of mites is challenging due to the large number of species, the microscopic size of the organisms, diverse phenotypes of the same species, similar morphology of different species and a shortage of molecular data. METHODS Nine medically important mite species belonging to six families, i.e. Demodex folliculorum, D. brevis, D. canis, D. caprae, Sarcoptes scabiei canis, Psoroptes cuniculi, Dermatophagoides farinae, Cheyletus malaccensis and Ornithonyssus bacoti, were collected and subjected to DNA barcoding. Sequences of cox1, 16S and 12S mtDNA, as well as ITS, 18S and 28S rDNA from mites were retrieved from GenBank and used as candidate genes. Sequence alignment and analysis identified 28S rDNA as the suitable target gene. Subsequently, universal primers of divergent domains were designed for molecular identification of 125 mite samples. Finally, the universality of the divergent domains with high identification efficiency was evaluated in Acari to screen DNA barcodes for mites. RESULTS Domains D5 (67.65%), D6 (62.71%) and D8 (77.59%) of the 28S rRNA gene had a significantly higher sequencing success rate, compared to domains D2 (19.20%), D3 (20.00%) and D7 (15.12%). The successful divergent domains all matched the closely-related species in GenBank with an identity of 74-100% and a coverage rate of 92-100%. Phylogenetic analysis also supported this result. Moreover, the three divergent domains had their own advantages. D5 had the lowest intraspecies divergence (0-1.26%), D6 had the maximum barcoding gap (10.54%) and the shortest sequence length (192-241 bp), and D8 had the longest indels (241 bp). Further universality analysis showed that the primers of the three divergent domains were suitable for identification across 225 species of 40 families in Acari. CONCLUSIONS This study confirmed that domains D5, D6 and D8 of 28S rDNA are universal DNA barcodes for molecular classification and identification of mites. 28S rDNA, as a powerful supplement for cox1 mtDNA 5'-end 648-bp fragment, recommended by the International Barcode of Life (IBOL), will provide great potential in molecular identification of mites in future studies because of its universality.
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Affiliation(s)
- Yae Zhao
- Department of Pathogen Biology and Immunology, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, People's Republic of China.
| | - Wan-Yu Zhang
- Department of Pathogen Biology and Immunology, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, People's Republic of China
| | - Rui-Ling Wang
- Assisted Reproduction Center, Northwest Women's and Children's Hospital, Xi'an, 710003, Shaanxi, People's Republic of China
| | - Dong-Ling Niu
- Department of Pathogen Biology and Immunology, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, People's Republic of China
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2
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The complete mitochondrial genome of Sarcoptes scabiei var. nyctereutis from the Japanese raccoon dog: Prediction and detection of two transfer RNAs (tRNA-A and tRNA-Y). Genomics 2019; 111:1183-1191. [DOI: 10.1016/j.ygeno.2018.09.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Revised: 08/21/2018] [Accepted: 09/04/2018] [Indexed: 11/20/2022]
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3
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Hyun J, Jang H, Hwang C, Yeon S. Clinical efficacy of orally administered fluralaner for treatment of scabies in six free‐ranging raccoon dogs (
Nyctereutes procyonoides
). Vet Dermatol 2019; 30:267-e81. [DOI: 10.1111/vde.12741] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/06/2019] [Indexed: 11/29/2022]
Affiliation(s)
- Jae‐Eun Hyun
- Laboratory of Veterinary Dermatology Research Institute for Veterinary Science College of Veterinary Medicine Seoul National University 1 Gwanak‐ro, Gwanak‐gu Seoul 08826 Republic of Korea
| | - Hyun‐Kyu Jang
- Seoul Wildlife Center 1 Gwanak‐ro, Gwanak‐gu Seoul 08826 Republic of Korea
| | - Cheol‐Yong Hwang
- Laboratory of Veterinary Dermatology Research Institute for Veterinary Science College of Veterinary Medicine Seoul National University 1 Gwanak‐ro, Gwanak‐gu Seoul 08826 Republic of Korea
| | - Seong‐Chan Yeon
- Seoul Wildlife Center 1 Gwanak‐ro, Gwanak‐gu Seoul 08826 Republic of Korea
- Laboratory of Wildlife Medicine and the Research Institute for Veterinary Science College of Veterinary Medicine Seoul National University 1 Gwanak‐ro, Gwanak‐gu Seoul 08826 Republic of Korea
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4
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Li CY, Sun Y, Xie Y, Zhou X, Gu XB, Lai WM, Peng XR, Yang G. Genetic variability of wildlife-derived Sarcoptes scabiei determined by the ribosomal ITS-2 and mitochondrial 16S genes. EXPERIMENTAL & APPLIED ACAROLOGY 2018; 76:53-70. [PMID: 30238307 DOI: 10.1007/s10493-018-0290-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Accepted: 08/23/2018] [Indexed: 06/08/2023]
Abstract
Infestation by the ectoparasitic mite Sarcoptes scabiei (Acari: Sarcoptidae) has important implications for global wildlife conservation and both animal and human health. Ribosomal and mitochondrial DNA sequences of parasites are useful to determine genetic diversity and to describe their likely dynamic evolution. In this study, we described the genetic diversity of S. scabiei individuals collected from wild animals in China by sequencing the ribosomal ITS-2 and mitochondrial 16S rRNA genes. A total of 13 Sarcoptes isolates of wildlife, coupled with one of rabbit origin, were subjected to genetic characteristics. After cloning and sequencing, 14 ITS-2 sequences and 12 16S rRNA sequences were obtained and analyzed. Further analysis of haplotype network and population genetic structure revealed that there were 79 haplotypes in ITS-2 (main haplotype H2) and 31 haplotypes in 16S rRNA (main haplotype C10). The phylogenetic trees showed some partial clustering by location and host, and the analysis of gene polymorphism may prompt that all isolates of S. scabiei have a similar origin. We speculate that the genetic evolution of S. scabiei may be related with that of the hosts, but more research is necessary to better understand the host-parasite co-evolutionary relationship in S. scabiei. These results provide new insights into understanding the population genetics and evolutionary biology of S. scabiei and therefore a better understanding of controlling its infestation pathways worldwide.
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Affiliation(s)
- Chun-Yan Li
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, Chengdu, 611130, Sichuan Province, China
| | - Yin Sun
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, Chengdu, 611130, Sichuan Province, China
| | - Yue Xie
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, Chengdu, 611130, Sichuan Province, China
| | - Xuan Zhou
- Institute of Animal Genetics and Breeding, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, 611130, China
| | - Xiao-Bin Gu
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, Chengdu, 611130, Sichuan Province, China
| | - Wei-Ming Lai
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, Chengdu, 611130, Sichuan Province, China
| | - Xue-Rong Peng
- Department of Chemistry, College of Life and Basic Science, Sichuan Agricultural University, Wenjiang, China
| | - Guangyou Yang
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, Chengdu, 611130, Sichuan Province, China.
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5
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Fraser TA, Carver S, Martin AM, Mounsey K, Polkinghorne A, Jelocnik M. A Sarcoptes scabiei specific isothermal amplification assay for detection of this important ectoparasite of wombats and other animals. PeerJ 2018; 6:e5291. [PMID: 30065882 PMCID: PMC6065476 DOI: 10.7717/peerj.5291] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Accepted: 07/02/2018] [Indexed: 11/20/2022] Open
Abstract
Background The globally distributed epidermal ectoparasite, Sarcoptes scabiei, is a serious health and welfare burden to at-risk human and animal populations. Rapid and sensitive detection of S. scabiei infestation is critical for intervention strategies. While direct microscopy of skin scrapings is a widely utilised diagnostic method, it has low sensitivity. PCR, alternatively, has been shown to readily detect mite DNA even in microscopy-negative skin scrapings. However, a limitation to the latter method is the requirements for specialised equipment and reagents. Such resources may not be readily available in regional or remote clinical settings and are an important consideration in diagnosis of this parasitic disease. Methodology A Loop Mediated Isothermal Amplification (LAMP) assay targeting the ITS-2 gene for S. scabiei was developed and evaluated on clinical samples from various hosts, previously screened with conventional S. scabies-specific PCR. Species specificity of the newly developed LAMP assay was tested against a range of DNA samples from other arthropods. The LAMP assays were performed on a real-time fluorometer as well as thermal cycler to evaluate an end-point of detection. Using skin scrapings, a rapid sample processing method was assessed to eliminate extensive processing times involved with DNA extractions prior to diagnostic assays, including LAMP. Results The S. scabiei LAMP assay was demonstrated to be species-specific and able to detect DNA extracted from a single mite within a skin scraping in under 30 minutes. Application of this assay to DNA extracts from skin scrapings taken from a range of hosts revealed 92.3% congruence (with 92.50% specificity and 100% sensitivity) to the conventional PCR detection of S. scabiei. Preliminary results have indicated that diagnostic outcome from rapidly processed dry skin scrapings using our newly developed LAMP is possible in approximately 40 minutes. Discussion We have developed a novel, rapid and robust molecular assay for detecting S. scabiei infesting humans and animals. Based on these findings, we anticipate that this assay will serve an important role as an ancillary diagnostic tool at the point-of-care, complementing existing diagnostic protocols for S. scabiei.
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Affiliation(s)
- Tamieka A Fraser
- USC Animal Research Centre, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Sippy Downs, Australia.,Department of Biological Sciences, University of Tasmania, Sandy Bay, Australia
| | - Scott Carver
- Department of Biological Sciences, University of Tasmania, Sandy Bay, Australia
| | - Alynn M Martin
- Department of Biological Sciences, University of Tasmania, Sandy Bay, Australia
| | - Kate Mounsey
- USC Animal Research Centre, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Sippy Downs, Australia.,School of Health and Sport Sciences, University of the Sunshine Coast, Sippy Downs, Australia
| | - Adam Polkinghorne
- USC Animal Research Centre, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Sippy Downs, Australia
| | - Martina Jelocnik
- USC Animal Research Centre, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Sippy Downs, Australia
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6
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Fraser TA, Shao R, Fountain-Jones NM, Charleston M, Martin A, Whiteley P, Holme R, Carver S, Polkinghorne A. Mitochondrial genome sequencing reveals potential origins of the scabies mite Sarcoptes scabiei infesting two iconic Australian marsupials. BMC Evol Biol 2017; 17:233. [PMID: 29183283 PMCID: PMC5706379 DOI: 10.1186/s12862-017-1086-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Accepted: 11/21/2017] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND Debilitating skin infestations caused by the mite, Sarcoptes scabiei, have a profound impact on human and animal health globally. In Australia, this impact is evident across different segments of Australian society, with a growing recognition that it can contribute to rapid declines of native Australian marsupials. Cross-host transmission has been suggested to play a significant role in the epidemiology and origin of mite infestations in different species but a chronic lack of genetic resources has made further inferences difficult. To investigate the origins and molecular epidemiology of S. scabiei in Australian wildlife, we sequenced the mitochondrial genomes of S. scabiei from diseased wombats (Vombatus ursinus) and koalas (Phascolarctos cinereus) spanning New South Wales, Victoria and Tasmania, and compared them with the recently sequenced mitochondrial genome sequences of S. scabiei from humans. RESULTS We found unique S. scabiei haplotypes among individual wombat and koala hosts with high sequence similarity (99.1% - 100%). Phylogenetic analysis of near full-length mitochondrial genomes revealed three clades of S. scabiei (one human and two marsupial), with no apparent geographic or host species pattern, suggestive of multiple introductions. The availability of additional mitochondrial gene sequences also enabled a re-evaluation of a range of putative molecular markers of S. scabiei, revealing that cox1 is the most informative gene for molecular epidemiological investigations. Utilising this gene target, we provide additional evidence to support cross-host transmission between different animal hosts. CONCLUSIONS Our results suggest a history of parasite invasion through colonisation of Australia from hosts across the globe and the potential for cross-host transmission being a common feature of the epidemiology of this neglected pathogen. If this is the case, comparable patterns may exist elsewhere in the 'New World'. This work provides a basis for expanded molecular studies into mange epidemiology in humans and animals in Australia and other geographic regions.
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Affiliation(s)
- Tamieka A. Fraser
- School of Biological Sciences, University of Tasmania, Sandy Bay, Hobart, TAS Australia
- Centre for Animal Health Innovation, School of Science and Engineering, University of the Sunshine Coast, Sippy Downs, QLD Australia
| | - Renfu Shao
- Centre for Animal Health Innovation, School of Science and Engineering, University of the Sunshine Coast, Sippy Downs, QLD Australia
| | | | - Michael Charleston
- School of Biological Sciences, University of Tasmania, Sandy Bay, Hobart, TAS Australia
- School of Information Technologies, University of Sydney, Camperdown, NSW Australia
| | - Alynn Martin
- School of Biological Sciences, University of Tasmania, Sandy Bay, Hobart, TAS Australia
| | - Pam Whiteley
- Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Werribee, VIC Australia
| | - Roz Holme
- Cedar Creek Wombat Rescue Inc. & Hospital, Cedar Creek, NSW Australia
| | - Scott Carver
- School of Biological Sciences, University of Tasmania, Sandy Bay, Hobart, TAS Australia
| | - Adam Polkinghorne
- Centre for Animal Health Innovation, School of Science and Engineering, University of the Sunshine Coast, Sippy Downs, QLD Australia
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7
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Abstract
The disease scabies is one of the earliest diseases of humans for which the cause was known. It is caused by the mite, Sarcoptes scabiei, that burrows in the epidermis of the skin of humans and many other mammals. This mite was previously known as Acarus scabiei DeGeer, 1778 before the genus Sarcoptes was established (Latreille 1802) and it became S. scabiei. Research during the last 40 years has tremendously increased insight into the mite’s biology, parasite-host interactions, and the mechanisms it uses to evade the host’s defenses. This review highlights some of the major advancements of our knowledge of the mite’s biology, genome, proteome, and immunomodulating abilities all of which provide a basis for control of the disease. Advances toward the development of a diagnostic blood test to detect a scabies infection and a vaccine to protect susceptible populations from becoming infected, or at least limiting the transmission of the disease, are also presented.
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Affiliation(s)
- Larry G Arlian
- Department of Biological Sciences, Wright State University, 3640 Colonel Glenn Hwy, Dayton, OH, 45435, USA.
| | - Marjorie S Morgan
- Department of Biological Sciences, Wright State University, 3640 Colonel Glenn Hwy, Dayton, OH, 45435, USA
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8
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Fraser TA, Charleston M, Martin A, Polkinghorne A, Carver S. The emergence of sarcoptic mange in Australian wildlife: an unresolved debate. Parasit Vectors 2016; 9:316. [PMID: 27255333 PMCID: PMC4890250 DOI: 10.1186/s13071-016-1578-2] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2016] [Accepted: 05/09/2016] [Indexed: 11/23/2022] Open
Abstract
Due to its suspected increase in host range and subsequent global diversification, Sarcoptes scabiei has important implications at a global scale for wildlife conservation and animal and human health. The introduction of this pathogen into new locations and hosts has been shown to produce high morbidity and mortality, a situation observed recently in Australian and North American wildlife. Of the seven native animal species in Australia known to be infested by S. scabiei, the bare-nosed wombat (Vombatus ursinus) suffers the greatest with significant population declines having been observed in New South Wales and Tasmania. The origins of sarcoptic mange in Australian native animals are poorly understood, with the most consistent conclusion being that mange was introduced by settlers and their dogs and subsequently becoming a major burden to native wildlife. Four studies exist addressing the origins of mange in Australia, but all Australian S. scabiei samples derive from only two of these studies. This review highlights this paucity of phylogenetic knowledge of S. scabiei within Australia, and suggests further research is needed to confidently determine the origin, or multiple origins, of this parasite. At the global scale, numerous genetic studies have attempted to reveal how the host species and host geographic location influence S. scabiei phylogenetics. This review includes an analysis of the global literature, revealing that inconsistent use of gene loci across studies significantly influences phylogenetic inference. Furthermore, by performing a contemporary analytical approach on existing data, it is apparent that (i) new S. scabiei samples, (ii) appropriate gene loci targets, and (iii) advanced phylogenetic approaches are necessary to more confidently comprehend the origins of mange in Australia. Advancing this field of research will aid in understanding the mechanisms of spillover for mange and other parasites globally.
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Affiliation(s)
- Tamieka A Fraser
- School of Biological Sciences, University of Tasmania, Sandy Bay, 7001, TAS, Australia. .,Centre for Animal Health Innovation, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, 91 Sippy Downs Drive, Sippy Downs, 4556, QLD, Australia.
| | - Michael Charleston
- School of Biological Sciences, University of Tasmania, Sandy Bay, 7001, TAS, Australia.,School of Information Technologies, University of Sydney, Camperdown, 2006, Sydney, Australia
| | - Alynn Martin
- School of Biological Sciences, University of Tasmania, Sandy Bay, 7001, TAS, Australia
| | - Adam Polkinghorne
- Centre for Animal Health Innovation, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, 91 Sippy Downs Drive, Sippy Downs, 4556, QLD, Australia
| | - Scott Carver
- School of Biological Sciences, University of Tasmania, Sandy Bay, 7001, TAS, Australia
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9
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Andriantsoanirina V, Fang F, Ariey F, Izri A, Foulet F, Botterel F, Bernigaud C, Chosidow O, Huang W, Guillot J, Durand R. Are humans the initial source of canine mange? Parasit Vectors 2016; 9:177. [PMID: 27015813 PMCID: PMC4807552 DOI: 10.1186/s13071-016-1456-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Accepted: 03/16/2016] [Indexed: 11/16/2022] Open
Abstract
Background Scabies, or mange as it is called in animals, is an ectoparasitic contagious infestation caused by the mite Sarcoptes scabiei. Sarcoptic mange is an important veterinary disease leading to significant morbidity and mortality in wild and domestic animals. A widely accepted hypothesis, though never substantiated by factual data, suggests that humans were the initial source of the animal contamination. In this study we performed phylogenetic analyses of populations of S. scabiei from humans and from canids to validate or not the hypothesis of a human origin of the mites infecting domestic dogs. Methods Mites from dogs and foxes were obtained from three French sites and from other countries. A part of cytochrome c oxidase subunit 1 (cox1) gene was amplified and directly sequenced. Other sequences corresponding to mites from humans, raccoon dogs, foxes, jackal and dogs from various geographical areas were retrieved from GenBank. Phylogenetic analyses were performed using the Otodectes cynotis cox1 sequence as outgroup. Maximum Likelihood and Bayesian Inference analysis approaches were used. To visualize the relationship between the haplotypes, a median joining haplotype network was constructed using Network v4.6 according to host. Results Twenty-one haplotypes were observed among mites collected from five different host species, including humans and canids from nine geographical areas. The phylogenetic trees based on Maximum Likelihood and Bayesian Inference analyses showed similar topologies with few differences in node support values. The results were not consistent with a human origin of S. scabiei mites in dogs and, on the contrary, did not exclude the opposite hypothesis of a host switch from dogs to humans. Conclusions Phylogenetic relatedness may have an impact in terms of epidemiological control strategy. Our results and other recent studies suggest to re-evaluate the level of transmission between domestic dogs and humans.
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Affiliation(s)
| | - Fang Fang
- Parasitology Department, College of Animal Science and Technology, Guangxi University, Nanning, China.,Research group Dynamyc, EnvA, UPEC, Maisons-Alfort & Créteil, Paris, France
| | - Frédéric Ariey
- Parasitology- Mycology Department, Cochin Hospital, AP-HP, Inserm U1016, Université Paris Descartes, Paris, France
| | - Arezki Izri
- Parasitology- Mycology Department, Avicenne Hospital, AP-HP, Bobigny, France.,UMR 190, Unité des virus émergents, Université Aix-Marseille, Faculté de Médecine-Timone, Marseille, France.,UFR SMBH, Université Paris 13, Bobigny, France
| | - Françoise Foulet
- Research group Dynamyc, EnvA, UPEC, Maisons-Alfort & Créteil, Paris, France.,Parasitology- Mycology Department, Henri Mondor Hospital, AP-HP, Créteil, France
| | - Françoise Botterel
- Research group Dynamyc, EnvA, UPEC, Maisons-Alfort & Créteil, Paris, France.,Parasitology- Mycology Department, Henri Mondor Hospital, AP-HP, Créteil, France
| | | | - Olivier Chosidow
- Dermatology Department, Henri Mondor Hospital, AP-HP, UPEC, Créteil, France
| | - Weiyi Huang
- Parasitology Department, College of Animal Science and Technology, Guangxi University, Nanning, China
| | - Jacques Guillot
- Research group Dynamyc, EnvA, UPEC, Maisons-Alfort & Créteil, Paris, France
| | - Rémy Durand
- Parasitology- Mycology Department, Avicenne Hospital, AP-HP, Bobigny, France. .,UFR SMBH, Université Paris 13, Bobigny, France. .,UMR216, Mère et enfant face aux infections tropicales, Faculté des Sciences Pharmaceutiques et Biologiques, Université Paris Descartes, Paris, France.
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10
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Andriantsoanirina V, Ariey F, Izri A, Bernigaud C, Fang F, Charrel R, Foulet F, Botterel F, Guillot J, Chosidow O, Durand R. Sarcoptes scabiei mites in humans are distributed into three genetically distinct clades. Clin Microbiol Infect 2015; 21:1107-14. [PMID: 26278670 DOI: 10.1016/j.cmi.2015.08.002] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2015] [Revised: 07/30/2015] [Accepted: 08/03/2015] [Indexed: 01/01/2023]
Abstract
Scabies is an ectoparasitic infestation caused by the mite Sarcoptes scabiei. Currently, S. scabiei is taxonomically divided into different varieties on the basis of host origin. Genetics-based research on scabies has been conducted, but the data on genetic diversity of populations of this mite in humans in Europe are lacking. We evaluated the genetic diversity of populations of S. scabiei. A large series of mites obtained from humans in France and the data of mites from various hosts and geographical areas retrieved from GenBank were included to investigate whether mites are divided into distinct populations. The study of cytochrome c oxidase subunit 1 gene polymorphisms were found to be best suited for phylogenetic analysis. S. scabiei mites were distributed into three genetically distinct clades, with most mites clustering in clades B and C. The Fst value and the Nm value calculated for mites included in clades B and C indicated a strong population structure and a very low gene flow between mites of those clades. The results of the present study not only support the rejection of the hypothesis of panmixia for S. scabiei in humans but also suggest that mites belonging to different clades are genetically isolated. Moreover, the results suggest that the subdivision of S. scabies in varieties according to animal or human hosts is not warranted. In conclusion, S. scabiei mites in humans do not constitute a homogeneous population. Further investigations are now required to assess whether different clinical forms of scabies are associated with particular haplotypes or clades.
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Affiliation(s)
- V Andriantsoanirina
- Service de Parasitologie-Mycologie, Hôpital Avicenne, Assistance Publique-Hôpitaux de Paris, France
| | - F Ariey
- Genetics and Genomics of Insect Vectors Unit, Institut Pasteur, Paris, France
| | - A Izri
- Service de Parasitologie-Mycologie, Hôpital Avicenne, Assistance Publique-Hôpitaux de Paris, France; Aix Marseille Université, IRD French Institute of Research for Development, EHESP French School of Public Health, EPV UMR_D 190 "Emergence des Pathologies Virales", & IHU Méditerranée Infection, APHM Public Hospitals of Marseille 13385, Marseille, France; UFR SMBH, Université Paris 13, Bobigny, France
| | - C Bernigaud
- Université Paris-Est Créteil Val de Marne, Service de Dermatologie, Hôpital Henri-Mondor Assistance Publique-Hôpitaux de Paris, Créteil, France; EA EpiDermE (Epidemiology in Dermatology and Evaluation of Therapeutics) and INSERM Centre d'Investigation Clinique (CIC) 1430, Université Paris-Est Créteil, Créteil, France; Parasitology Department, Dynamyc Research Group, UPEC Ecole Nationale Vétérinaire d'Alfort, France
| | - F Fang
- Parasitology Department, Dynamyc Research Group, UPEC Ecole Nationale Vétérinaire d'Alfort, France
| | - R Charrel
- Aix Marseille Université, IRD French Institute of Research for Development, EHESP French School of Public Health, EPV UMR_D 190 "Emergence des Pathologies Virales", & IHU Méditerranée Infection, APHM Public Hospitals of Marseille 13385, Marseille, France
| | - F Foulet
- Université Paris-Est Créteil Val de Marne and Laboratory of Parasitology and Mycology, Hôpital Henri Mondor, Assistance Publique-Hôpitaux de Paris, Créteil, France
| | - F Botterel
- Université Paris-Est Créteil Val de Marne and Laboratory of Parasitology and Mycology, Hôpital Henri Mondor, Assistance Publique-Hôpitaux de Paris, Créteil, France
| | - J Guillot
- Parasitology Department, Dynamyc Research Group, UPEC Ecole Nationale Vétérinaire d'Alfort, France
| | - O Chosidow
- Université Paris-Est Créteil Val de Marne, Service de Dermatologie, Hôpital Henri-Mondor Assistance Publique-Hôpitaux de Paris, Créteil, France; EA EpiDermE (Epidemiology in Dermatology and Evaluation of Therapeutics) and INSERM Centre d'Investigation Clinique (CIC) 1430, Université Paris-Est Créteil, Créteil, France
| | - R Durand
- Service de Parasitologie-Mycologie, Hôpital Avicenne, Assistance Publique-Hôpitaux de Paris, France; UFR SMBH, Université Paris 13, Bobigny, France; UMR216, Mère et Enfant Face Aux Infections Tropicales, Faculté des Sciences Pharmaceutiques et Biologiques, Université Paris Descartes, Paris, France.
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