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Zhao Y, Shi Y, Shen S, Zhang Y, Wei G, Jin X. Plasma Circulating Cell-Free DNA Facilitated the Detection of an Alveolar Echinococcosis Patient Initially Misdiagnosed as Cystic Echinococcosis: A Case Report. Trop Med Infect Dis 2024; 9:88. [PMID: 38668549 PMCID: PMC11054191 DOI: 10.3390/tropicalmed9040088] [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: 03/13/2024] [Revised: 04/09/2024] [Accepted: 04/15/2024] [Indexed: 04/29/2024] Open
Abstract
Echinococcosis, especially alveolar echinococcosis (AE), is becoming an emerging/re-emerging disease with a growing number of cases reported globally. The diagnosis of echinococcosis is based mainly on imaging, which may be challenging when the image presentation is atypical. We reported one patient with suspected cystic echinococcosis (CE) by imaging. The cell-free DNA (cfDNA) obtained from sequencing the patient's plasma before the operation showed that this patient probably had AE with 45 reads mapped to the Echinococcus multilocularis reference genome (Read-Pairs Per Million = 0.24). The patients underwent surgery, and the pathological result showed that the patient had AE. The conventional polymerase chain reaction (PCR) of her lesion sample extraction also indicated that the infection was caused by Echinococcus multilocularis. The follow-up ultrasound after three months indicated no recurrence. We demonstrated that the differentiation of CE and AE by imaging may not be that easy, with further elaboration on the differentiation between AE and CE in different aspects. We demonstrated that it is possible to use patients' plasma cfDNA mapped to Echinococcus references before the operation to obtain the objective clue of the lesion to facilitate diagnosis.
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Affiliation(s)
- Yanping Zhao
- BGI Research, Shenzhen 518083, China; (Y.Z.); (Y.Z.)
- Department of Hepatobiliary Surgery II, The People’s Hospital of Ganzi Tibetan Autonomous Prefecture, Kangding 626000, China;
| | - Yiyang Shi
- Department of Hepatobiliary Surgery II, The People’s Hospital of Ganzi Tibetan Autonomous Prefecture, Kangding 626000, China;
| | - Shu Shen
- Department of Liver Surgery, West China Hospital of Sichuan University, Chengdu 610041, China;
| | - Yan Zhang
- BGI Research, Shenzhen 518083, China; (Y.Z.); (Y.Z.)
| | - Gengfu Wei
- Department of Hepatobiliary Surgery II, The People’s Hospital of Ganzi Tibetan Autonomous Prefecture, Kangding 626000, China;
| | - Xin Jin
- BGI Research, Shenzhen 518083, China; (Y.Z.); (Y.Z.)
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Romig T, Wassermann M. Echinococcus species in wildlife. Int J Parasitol Parasites Wildl 2024; 23:100913. [PMID: 38405672 PMCID: PMC10884515 DOI: 10.1016/j.ijppaw.2024.100913] [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: 12/15/2023] [Revised: 01/31/2024] [Accepted: 02/01/2024] [Indexed: 02/27/2024]
Abstract
Transmission of Echinococcus spp. in life cycles that involve mainly wildlife is well recognized for those species with small mammals as intermediate hosts (e. g. E. multilocularis), as well as for E. felidis and the 'northern' genotypes of E. canadensis (G8 and G10). In contrast, the remaining taxa of E. granulosus sensu lato are best known for their domestic life cycles, and the numerous wild mammal species (mainly ungulates) that have been recorded with cystic echinococcosis in the past were mainly considered a result of spill-over from the dog-livestock transmission system. This view was challenged with the advent of molecular characterization, allowing discrimination of the metacestodes, although the contribution of wild mammals to various Echinococcus life cycles has remained uncertain for scarcity of wildlife studies. Numerous records of cysts in wild ungulates date back to the 20th century, but cannot with certainty be allocated to the Echinococcus species and genotypes that are recognized today. This means that our current knowledge is largely restricted to studies of the past two decades that kept adding gradually to our concepts of transmission in various geographic regions. In particular, new insights were gathered in the past years on E. granulosus s.l. in wildlife of sub-Saharan Africa, but also on transmission patterns of E. multilocularis in previously neglected regions, e. g. North America. Here, an update is provided on the current state of knowledge on wild mammals as hosts for all Echinococcus species, listing >150 species of wild hosts with references, as well as estimates on their epidemiological impact and our current gaps of knowledge.
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Affiliation(s)
- Thomas Romig
- University of Hohenheim, Parasitology Unit, 70599, Stuttgart, Germany
- University of Hohenheim, Center for Biodiversity and Integrative Taxonomy, 70599, Stuttgart, Germany
| | - Marion Wassermann
- University of Hohenheim, Parasitology Unit, 70599, Stuttgart, Germany
- University of Hohenheim, Center for Biodiversity and Integrative Taxonomy, 70599, Stuttgart, Germany
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3
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Pu G, Li Y, Liu T, Li H, Wang L, Chen G, Cao S, Yin H, Amuda TO, Guo X, Luo X. mmu-miR-374b-5p modulated inflammatory factors via downregulation of C/EBP β/NF-κB signaling in Kupffer cells during Echinococcus multilocularis infection. Parasit Vectors 2024; 17:163. [PMID: 38553755 PMCID: PMC10981327 DOI: 10.1186/s13071-024-06238-0] [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: 10/08/2023] [Accepted: 03/05/2024] [Indexed: 04/01/2024] Open
Abstract
BACKGROUND Alveolar echinococcosis (AE) is an important infectious disease caused by the metacestode larvae of Echinococcus multilocularis, seriously threatening global public health security. Kupffer cells (KCs) play important roles in liver inflammatory response. However, their role in hepatic alveolar echinococcosis has not yet been fully elucidated. METHODS In this study, qRT-PCR was used to detect the expression level of miR-374b-5p in KCs. The target gene of miR-374b-5p was identified through luciferase reporter assays and loss of function and gains. Critical genes involved in NFκB signaling pathway were analyzed by qRT-PCR and western blot. RESULTS This study reported that miR-374b-5p was significantly upregulated in KCs during E. multilocularis infection and further showed that miR-374b-5p was able to bind to the 3'-UTR of the C/EBP β gene and suppressed its expression. The expression levels of NF-κBp65, p-NF-κBp65 and pro-inflammatory factors including iNOS, TNFα and IL6 were attenuated after overexpression of miR-374b-5p while enhanced after suppression of miR-374b-5p. However, the Arg1 expression level was promoted after overexpression of miR-374b-5p while suppressed after downregulation of miR-374b-5p. Additionally, increased protein levels of NF-κBp65 and p-NF-κBp65 were found in the C/EBP β-overexpressed KCs. CONCLUSIONS These results demonstrated that miR-374b-5p probably regulated the expression of inflammatory factors via C/EBP β/NF-κB signaling. This finding is helpful to explore the mechanism of inflammation regulation during E. multilocularis infection.
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Affiliation(s)
- Guiting Pu
- State Key Laboratory for Animal Disease Control and Prevention, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences (CAAS), Lanzhou, 730046, Gansu Province, People's Republic of China
| | - Yanping Li
- State Key Laboratory for Animal Disease Control and Prevention, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences (CAAS), Lanzhou, 730046, Gansu Province, People's Republic of China
| | - Tingli Liu
- State Key Laboratory for Animal Disease Control and Prevention, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences (CAAS), Lanzhou, 730046, Gansu Province, People's Republic of China
| | - Hong Li
- State Key Laboratory for Animal Disease Control and Prevention, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences (CAAS), Lanzhou, 730046, Gansu Province, People's Republic of China
| | - Liqun Wang
- State Key Laboratory for Animal Disease Control and Prevention, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences (CAAS), Lanzhou, 730046, Gansu Province, People's Republic of China
| | - Guoliang Chen
- State Key Laboratory for Animal Disease Control and Prevention, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences (CAAS), Lanzhou, 730046, Gansu Province, People's Republic of China
| | - Shanling Cao
- State Key Laboratory for Animal Disease Control and Prevention, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences (CAAS), Lanzhou, 730046, Gansu Province, People's Republic of China
| | - Hong Yin
- State Key Laboratory for Animal Disease Control and Prevention, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences (CAAS), Lanzhou, 730046, Gansu Province, People's Republic of China
- Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonoses, Yangzhou University, Yangzhou, 225009, People's Republic of China
| | - Tharheer Oluwashola Amuda
- State Key Laboratory for Animal Disease Control and Prevention, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences (CAAS), Lanzhou, 730046, Gansu Province, People's Republic of China
| | - Xiaola Guo
- State Key Laboratory for Animal Disease Control and Prevention, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences (CAAS), Lanzhou, 730046, Gansu Province, People's Republic of China.
| | - Xuenong Luo
- State Key Laboratory for Animal Disease Control and Prevention, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences (CAAS), Lanzhou, 730046, Gansu Province, People's Republic of China.
- Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonoses, Yangzhou University, Yangzhou, 225009, People's Republic of China.
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Jeeves SP, Kotwa JD, Stevens B, Shirose L, Cai HY, Peregrine AS, Mubareka S, Jardine CM. Additional diagnoses of Echinococcus multilocularis in eastern chipmunks (Tamias striatus) from southern Ontario - results from ongoing surveillance for E. multilocularis in intermediate hosts in Ontario, Canada. Vet Parasitol Reg Stud Reports 2024; 48:100982. [PMID: 38316509 DOI: 10.1016/j.vprsr.2024.100982] [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: 11/06/2023] [Revised: 12/21/2023] [Accepted: 01/01/2024] [Indexed: 02/07/2024]
Abstract
Echinococcus multilocularis, a cestode with zoonotic potential, is now known to have a high prevalence in wild canid definitive hosts of southern Ontario. The distribution of E. multilocularis across this region in red foxes (Vulpes vulpes) and coyotes (Canis latrans) is widespread yet heterogenous. In contrast, confirmed diagnoses of E. multilocularis in wild free-ranging intermediate hosts within Ontario are currently limited to a single eastern chipmunk (Tamias striatus). These findings prompted ongoing surveillance efforts in intermediate host species, primarily rodents. Our report describes the results of passive surveillance through wildlife carcass submissions to the Canadian Wildlife Health Cooperative (CWHC) and targeted active sampling of small mammal species from 2018 to 2023; a second and third eastern chipmunk were found to be infected with E. multilocularis. However, these were the only occurrences from surveillance efforts which collectively totaled 510 rodents and other small mammals. Continued surveillance for E. multilocularis in intermediate hosts is of high importance in light of the recent emergence of this parasite in Ontario.
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Affiliation(s)
- Simon P Jeeves
- Department of Pathobiology, University of Guelph, 50 Stone Rd E, Guelph, Ontario N1G 2W1, Canada.
| | | | - Brian Stevens
- Canadian Wildlife Health Cooperative, Ontario-Nunavut, Department of Pathobiology, University of Guelph, Guelph, Ontario N1G 2W1, Canada
| | - Leonard Shirose
- Canadian Wildlife Health Cooperative, Ontario-Nunavut, Department of Pathobiology, University of Guelph, Guelph, Ontario N1G 2W1, Canada
| | - Hugh Y Cai
- Animal Health Laboratory, University of Guelph, Guelph, Ontario N1G 2W1, Canada
| | - Andrew S Peregrine
- Department of Pathobiology, University of Guelph, 50 Stone Rd E, Guelph, Ontario N1G 2W1, Canada
| | - Samira Mubareka
- Sunnybrook Research Institute, Toronto, Ontario M4N 3M5, Canada
| | - Claire M Jardine
- Department of Pathobiology, University of Guelph, 50 Stone Rd E, Guelph, Ontario N1G 2W1, Canada; Canadian Wildlife Health Cooperative, Ontario-Nunavut, Department of Pathobiology, University of Guelph, Guelph, Ontario N1G 2W1, Canada
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5
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Kazmi K, Krueger C, Wong W, Baertschiger RM, Hui C, Nagy A, Navarro OM, Razik F, Schwartz KL, Boggild AK, Morris SK. A Canadian children's hospital's experience with cystic echinococcosis over 30 years: A case series. JOURNAL OF THE ASSOCIATION OF MEDICAL MICROBIOLOGY AND INFECTIOUS DISEASE CANADA = JOURNAL OFFICIEL DE L'ASSOCIATION POUR LA MICROBIOLOGIE MEDICALE ET L'INFECTIOLOGIE CANADA 2024; 8:262-271. [PMID: 38250618 PMCID: PMC10797762 DOI: 10.3138/jammi-2022-0041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 08/03/2023] [Accepted: 08/19/2023] [Indexed: 01/23/2024]
Abstract
Background Cystic echinococcosis (CE) or hydatid disease caused by the cestode Echinococcus granulosus sensu lato is an uncommon infection in Canada especially among children. There are limited reports describing the clinical presentation and management in Canadian children. Methods The medical records of all children diagnosed with CE at a quaternary paediatric centre in Ontario between January 1988 and August 2021 were retrospectively reviewed. The clinical course, management, and outcomes of each case were summarized. Results We report two paediatric cases of cystic echinococcosis (CE) in detail and review four additional cases seen at our institution over 33.5 years. The first case was a previously healthy 12-year-old boy with pulmonary CE resulting in unilateral lung collapse and mediastinal shift, who was presumedly infected while living in the Middle East. The second case was a previously healthy 3-year-old girl with pulmonary CE acquired locally in southern Ontario. Four other cases of CE with hepatic involvement (median age 12.5 years) were identified during the study period. Five out of six patients received both surgical and medical therapy. Conclusion CE is a rare but serious disease seen in southern Canada that has historically been associated with travel or migration. Due to changes in urban wildlife landscapes and increased global migration, CE may become more prevalent in Canadian children. We describe the first locally acquired case in rural southern Ontario diagnosed at our centre. Prompt recognition of this infection in children by health care providers is important to prevent morbidity and mortality.
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Affiliation(s)
- Kescha Kazmi
- Division of Infectious Diseases, Department of Pediatrics, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Carsten Krueger
- Division of Infectious Diseases, Immunology, and Allergy, Department of Pediatrics, Children's Hospital of Eastern Ontario, Ottawa, Ontario, Canada
| | - Waison Wong
- Division of Infectious Diseases, Department of Pediatrics, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Reto M Baertschiger
- Division of General and Thoracic Surgery, Department of Surgery, The Hospital for Sick Children, University of Toronto, Ontario, Canada
| | - Charles Hui
- Division of Infectious Diseases, Immunology, and Allergy, Department of Pediatrics, Children's Hospital of Eastern Ontario, Ottawa, Ontario, Canada
| | - Anita Nagy
- Division of Pathology, Department of Pediatric Laboratory Medicine, The Hospital for Sick Children, Toronto, Ontario, Canada
- Department of Pathobiology and Laboratory Medicine, University of Toronto, Toronto, ON, Canada
| | - Oscar M Navarro
- Department of Diagnostic Imaging, The Hospital for Sick Children, Toronto, Ontario, Canada
- Department of Medical Imaging, University of Toronto, Toronto, Ontario, Canada
| | - Fathima Razik
- Division of Emergency Medicine, Department of Pediatrics, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Kevin L Schwartz
- Unity Health Toronto, Toronto, Ontario, Canada
- Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada
| | - Andrea K Boggild
- Tropical Disease Unit, Toronto General Hospital, Toronto, Ontario, Canada
- Department of Medicine, University of Toronto, Toronto, Ontario, Canada
- Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada
| | - Shaun K Morris
- Division of Infectious Diseases, Department of Pediatrics, The Hospital for Sick Children, Toronto, Ontario, Canada
- Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada
- Centre of Global Child Health, Child Health Evaluative Sciences, The Hospital for Sick Children Research Institute, Toronto, Ontario, Canada
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6
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Zewude RT, Corbeil A, Fung S, Moulton CA, Bogoch II. Alveolar Echinococcus in a 70-year-old man in Ontario. JOURNAL OF THE ASSOCIATION OF MEDICAL MICROBIOLOGY AND INFECTIOUS DISEASE CANADA = JOURNAL OFFICIEL DE L'ASSOCIATION POUR LA MICROBIOLOGIE MEDICALE ET L'INFECTIOLOGIE CANADA 2024; 8:336-342. [PMID: 38250619 PMCID: PMC10797761 DOI: 10.3138/jammi-2023-0012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Revised: 06/13/2023] [Accepted: 07/09/2023] [Indexed: 01/23/2024]
Abstract
Background Alveolar echinococcus, caused by the tapeworm Echinococcus multilocularis, mimics hepatic malignancy, and carries a mortality rate exceeding 90% in untreated patients. Methods Diagnosis of E. multilocularis infection is established through clinical, radiographic, and microbiological assessments. Currently available laboratory diagnostics in Ontario are fresh tissue microscopy and histopathology. However, genus-specific Echinococcus enzyme-linked immunosorbent assay (ELISA) serology as well as confirmatory testing with species-specific serology and E. multilocularis polymerase chain reaction (PCR) can be obtained from external reference laboratories. Results The article presents the first case report of human alveolar echinococcus in Ontario. We outline the multidisciplinary approach of diagnosis as well as surgical and medical management of E. multilocularis infection in a 70-year-old man in Ontario. We describe prior literature of alveolar echinococcus in Canadian settings and highlight its emerging nature with recent human case clusters in the Prairies and reports of E. multilocularis in recent veterinary literature in Ontario. Conclusion E. multilocularis is an emerging parasitic infection in Canadian settings including Ontario. Clinicians should be aware of the emergence of this invasive infection, especially in those with close contact to canids.
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Affiliation(s)
- Rahel T Zewude
- Division of Infectious Diseases, Department of Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Antoine Corbeil
- Public Health Ontario, Ontario, Canada
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada
| | - Scott Fung
- Division of Gastroenterology and Hepatology, Department of Medicine, University of Toronto, Toronto Centre for Liver Diseases, Toronto, Ontario, Canada
| | - Carol-Anne Moulton
- Hepatobiliary/Pancreatic Surgical Program, Wallace McCain Centre for Pancreatic Cancer, Princess Margaret Cancer Centre, Toronto, Ontario, Canada
| | - Isaac I Bogoch
- Division of Infectious Diseases, Department of Medicine, University of Toronto, Toronto, Ontario, Canada
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Malone CJ, Kolapo TU, Whitney H, Callahan C, Hann S, Keefe D, Jenkins E. New Geographic Records for Trichinella nativa and Echinococcus canadensis in Coyotes (Canis latrans) from Insular Newfoundland, Canada. J Wildl Dis 2024; 60:211-215. [PMID: 37972642 DOI: 10.7589/jwd-d-23-00084] [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: 05/08/2023] [Accepted: 08/14/2023] [Indexed: 11/19/2023]
Abstract
Coyotes (Canis latrans) rapidly expanded across North America during the 20th century and in 1987 colonized insular Newfoundland, Canada. Their arrival brought the potential for new predator-prey interactions and the potential for transmission of parasites to naïve populations. Trichinella spp. and Echinococcus spp. are zoonotic parasites not previously reported from the island of Newfoundland, Canada. Muscle samples (diaphragm and tongue) from 153 coyotes and feces from 35/153 coyotes were collected. Larvae of Trichinella spp. were recovered by muscle digestion from 6/153 coyotes (3.9%) and identified using multiplex PCR and Sanger sequencing as T. nativa. Fecal samples were screened for DNA of Echinococcus spp. using qPCR, and intestines from positive animals were examined for adult cestodes. No fecal samples were positive for DNA of E. multilocularis, and 2/35 (5.7%) samples were positive for E. canadensis, of which one was successfully genotyped as the G10 cervid strain. Echinococcus canadensis has not previously been reported on the island of Newfoundland, historically the only region of Canada where Echinococcus spp. was not known to occur. No species of Trichinella have previously been reported on the island. Both parasites are zoonotic, and hunters, trappers, dog owners, and the general public should be aware of these new risks for public health.
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Affiliation(s)
- Cody J Malone
- Department of Veterinary Microbiology, Western College of Veterinary Medicine, University of Saskatchewan, 52 Campus Drive, Saskatoon, Saskatchewan, S7N 5B4, Canada
| | - Temitope U Kolapo
- Department of Veterinary Microbiology, Western College of Veterinary Medicine, University of Saskatchewan, 52 Campus Drive, Saskatoon, Saskatchewan, S7N 5B4, Canada
| | - Hugh Whitney
- Department of Biology, Memorial University of Newfoundland, 45 Arctic Avenue, St. John's, Newfoundland and Labrador, A1C 5S7, Canada
| | - Chris Callahan
- Fisheries, Forestry and Agriculture, Government of Newfoundland and Labrador, 192 Wheeler's Road, Corner Brook, P.O. Box 2006, Newfoundland and Labrador, A2H 0J1, Canada
| | - Shane Hann
- Fisheries, Forestry and Agriculture, Government of Newfoundland and Labrador, 192 Wheeler's Road, Corner Brook, P.O. Box 2006, Newfoundland and Labrador, A2H 0J1, Canada
| | - Don Keefe
- Fisheries, Forestry and Agriculture, Government of Newfoundland and Labrador, 192 Wheeler's Road, Corner Brook, P.O. Box 2006, Newfoundland and Labrador, A2H 0J1, Canada
| | - Emily Jenkins
- Department of Veterinary Microbiology, Western College of Veterinary Medicine, University of Saskatchewan, 52 Campus Drive, Saskatoon, Saskatchewan, S7N 5B4, Canada
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Trudeau MJ, Goldsmith D, Letain C, Stamler S, Rothenburger JL. MUSKRATS (ONDATRA ZIBETHICUS) ARE COMPETENT INTERMEDIATE HOSTS OF ECHINOCOCCUS MULTILOCULARIS IN NORTH AMERICA. J Wildl Dis 2023; 59:684-693. [PMID: 37768814 DOI: 10.7589/jwd-d-23-00017] [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: 02/01/2023] [Accepted: 06/06/2023] [Indexed: 09/30/2023]
Abstract
The tapeworm Echinococcus multilocularis is an emerging pathogen of significance to human and animal health in Canada, yet little is known about key rodent intermediate hosts in local urban ecosystems. In Europe, invasive muskrats (Ondatra zibethicus) are an important indicator intermediate host species; however, the role of this semiaquatic rodent in the ecology of E. multilocularis is undetermined in the North American context. We examined 93 muskrats that were livetrapped in the spring of 2017 within Calgary, Alberta, Canada, for the presence of E. multilocularis infection. The objectives of this study were to 1) diagnose alveolar echinococcosis using macroscopic assessment, histopathology, and molecular analyses; 2) quantify infection severity; and 3) assess host demographic risk factors for infection. Macroscopic cysts consistent with alveolar echinococcosis were present in 24% of muskrats (22/93). Most individuals had hepatic cysts; however, cysts were also occasionally detected in the mesentery, reproductive organs, omentum, peritoneum, spleen, diaphragm, lung, or kidney. The mean number of cysts per liver was 2.1 (range, 1-4). We examined hepatic cysts from 18 individuals using histology; all had lesions compatible with alveolar echinococcosis. Protoscoleces, indicative of patent infections, were present in 14/18 (78%). No demographic risk factors (sex, body condition, body mass) were significantly associated with infection. Muskrats in the North American context are competent intermediate hosts with high infection prevalence and may play an important role in the ecology of this emerging parasite.
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Affiliation(s)
- Marian J Trudeau
- Faculty of Veterinary Medicine, University of Calgary, 3280 Hospital Dr. NW, Calgary, Alberta T2N 4Z6, Canada
| | - Dayna Goldsmith
- Faculty of Veterinary Medicine, University of Calgary, 3280 Hospital Dr. NW, Calgary, Alberta T2N 4Z6, Canada
- Canadian Wildlife Health Cooperative-Alberta Region, 3280 Hospital Dr. NW, Calgary, Alberta T2N 4Z6, Canada
| | - Collin Letain
- Canadian Wildlife Health Cooperative-Alberta Region, 3280 Hospital Dr. NW, Calgary, Alberta T2N 4Z6, Canada
| | - Samantha Stamler
- Wildlife Management Branch, Government of Alberta, 6909 116 St. NW, Edmonton, Alberta T6H 4P2, Canada
| | - Jamie L Rothenburger
- Faculty of Veterinary Medicine, University of Calgary, 3280 Hospital Dr. NW, Calgary, Alberta T2N 4Z6, Canada
- Canadian Wildlife Health Cooperative-Alberta Region, 3280 Hospital Dr. NW, Calgary, Alberta T2N 4Z6, Canada
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9
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Sugden S, Steckler DK, Sanderson D, Abercrombie B, Abercrombie D, Seguin MA, Ford K, St. Clair CC. Age-dependent relationships among diet, body condition, and Echinococcus multilocularis infection in urban coyotes. PLoS One 2023; 18:e0290755. [PMID: 37647321 PMCID: PMC10468061 DOI: 10.1371/journal.pone.0290755] [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: 06/02/2023] [Accepted: 08/14/2023] [Indexed: 09/01/2023] Open
Abstract
Urban coyotes (Canis latrans) in North America increasingly exhibit a high prevalence of Echinococcus multilocularis, a cestode of recent and rising public health concern that uses rodents as intermediate hosts and canids as definitive hosts. However, little is known about the factors that drive the high urban prevalence of this parasite. We hypothesized that the diet of urban coyotes may contribute to their higher E. multilocularis infection prevalence via either (a) greater exposure to the parasite from increased rodent consumption or (b) increased susceptibility to infection due to the negative health effects of consuming anthropogenic food. We tested these hypotheses by comparing the presence and intensity of E. multilocularis infection to physiological data (age, sex, body condition, and spleen mass), short-term diet (stomach contents), and long-term diet (δ13C and δ15N stable isotopes) in 112 coyote carcasses collected for reasons other than this study from Edmonton, Alberta and the surrounding area. Overall, the best predictor of infection status in this population was young age, where the likelihood of infection decreased with age in rural coyotes but not urban ones. Neither short- nor long-term measures of diet could predict infection across our entire sample, but we found support for our initial hypotheses in young, urban coyotes: both rodent and anthropogenic food consumption effectively predicted E. multilocularis infection in this population. The effects of these predictors were more variable in rural coyotes and older coyotes. We suggest that limiting coyote access to areas in which anthropogenic food and rodent habitat overlap (e.g., compost piles or garbage sites) may effectively reduce the risk of infection, deposition, and transmission of this emerging zoonotic parasite in urban areas.
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Affiliation(s)
- Scott Sugden
- Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada
- Department of Natural Resource Sciences, McGill University, Sainte-Anne-de-Bellevue, Quebec, Canada
| | - Deanna K. Steckler
- Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada
| | - Dana Sanderson
- Department of Biological Sciences, MacEwan University, Edmonton, Alberta, Canada
| | - Bill Abercrombie
- Animal Damage Control, Bushman Inc., Sherwood Park, Alberta, Canada
| | | | - M. Alexis Seguin
- IDEXX Laboratories, Inc., Westbrook, Maine, United States of America
| | - Kyra Ford
- Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada
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10
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Marsico TV, Silva MV, Valente RS, Annes K, Rissi VB, Glanzner WG, Sudano MJ. Unraveling the Consequences of Oxygen Imbalance on Early Embryo Development: Exploring Mitigation Strategies. Animals (Basel) 2023; 13:2171. [PMID: 37443969 DOI: 10.3390/ani13132171] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 06/24/2023] [Accepted: 06/27/2023] [Indexed: 07/15/2023] Open
Abstract
Although well-established and adopted by commercial laboratories, the in vitro embryo production system still requires refinements to achieve its highest efficiency. Early embryonic development is a dynamic event, demanding suitable conditions to provide a high number of embryos with quality and competence. The first step to obtaining an optimized in vitro environment is to know the embryonic metabolism and energy request throughout the different stages of development. Oxygen plays a crucial role in several key biological processes necessary to sustain and complete embryonic development. Nonetheless, there is still controversy regarding the optimal in vitro atmospheric concentrations during culture. Herein, we discuss the impact of oxygen tension on the viability of in vitro-produced embryos during early development. The importance of oxygen tension is addressed as its roles regarding essential embryonic traits, including embryo production rates, embryonic cell viability, gene expression profile, epigenetic regulation, and post-cryopreservation survival. Finally, we highlight the damage caused by in vitro unbalanced oxygen tensions and strategies to mitigate the harmful effects.
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Affiliation(s)
- Thamiris Vieira Marsico
- Center for Natural and Human Sciences, Federal University of ABC, Santo André 09210-580, SP, Brazil
| | - Mara Viana Silva
- Center for Natural and Human Sciences, Federal University of ABC, Santo André 09210-580, SP, Brazil
| | - Roniele Santana Valente
- Center for Natural and Human Sciences, Federal University of ABC, Santo André 09210-580, SP, Brazil
| | - Kelly Annes
- Department of Genetics and Evolution, Federal University of São Carlos, São Carlos 13565-905, SP, Brazil
| | - Vitor Braga Rissi
- Faculty of Veterinary Medicine, Federal University of Santa Catarina, UFSC, Curitibanos 89520-000, SC, Brazil
| | - Werner Giehl Glanzner
- Department of Animal Science, McGill University, Sainte-Anne-de-Bellevue, QC H9X 3V9, Canada
| | - Mateus José Sudano
- Center for Natural and Human Sciences, Federal University of ABC, Santo André 09210-580, SP, Brazil
- Department of Genetics and Evolution, Federal University of São Carlos, São Carlos 13565-905, SP, Brazil
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11
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Fisher MA, Rees B, Capner C, Pritchard S, Holdsworth PA, Fitzgerald RA. A survey of gastrointestinal parasites in dogs illegally entering the UK (2015-2017). Vet Rec Open 2023; 10:e54. [PMID: 36643053 PMCID: PMC9832338 DOI: 10.1002/vro2.54] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 09/29/2022] [Accepted: 11/21/2022] [Indexed: 01/12/2023] Open
Abstract
Background This study involving non-compliant, seized dogs entering the UK surveyed endoparasites detected in faecal samples. A focus was placed on taeniid infection as the detection of these tapeworms acts as a marker for failure of effective tapeworm treatment. Methods Individual faecal samples taken from 65 dogs over a 24-month period were examined for helminth eggs, for protozoal oocysts and cysts, using a centrifugal flotation technique. Any sample presenting positive results for taeniid eggs had residual faeces examined using polymerase chain reaction to aid speciation of the tapeworm eggs. Additionally, a Baermann technique was used to assess faeces for lungworm larvae. Results Patent endoparasite infection was detected in 27.7% of dog faecal samples. No sample was positive for lungworm larvae. Five dogs were co-infected with Isospora spp. and Toxocara canis. One dog sample was detected with taeniid eggs, identified as Taenia serialis. Conclusions The taeniid-positive dog indicated that appropriate tapeworm treatment may not have occurred, reinforcing the risk to the UK of illegally imported dogs potentially introducing Echinococcus multilocularis infection.
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Affiliation(s)
| | - Beth Rees
- Ridgeway Research LtdGloucestershireUK
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12
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French SK, Kotwa JD, Singh B, Greer T, Pearl DL, Elsemore DA, Hanna R, Jardine CM, Weese JS, Mercer N, Peregrine AS. Factors associated with Giardia infection in dogs in southern Ontario, Canada. Vet Parasitol Reg Stud Reports 2023; 41:100870. [PMID: 37208074 DOI: 10.1016/j.vprsr.2023.100870] [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: 01/10/2023] [Revised: 03/10/2023] [Accepted: 04/04/2023] [Indexed: 05/21/2023]
Abstract
Information concerning risk factors associated with Giardia infection in dogs in southern Ontario, Canada, is currently lacking. This study therefore aimed to identify risk factors for Giardia infection in dogs that visit off-leash dog parks in southern Ontario. From May-November 2018, fecal samples were collected from 466 dogs in 12 off-leash dog parks in the Niagara and Hamilton regions of Ontario. A survey that asked questions pertaining to travel history (i.e., area of residence, locations and regions visited in the previous 6 months), basic medical history (i.e., spay/neuter status, veterinary visits, use of deworming medication), consumption of a raw diet, and the physical (i.e., age, sex, breed) and behavioral characteristics (i.e., off-leash activities, hunting activities) of each dog sampled was administered to the respective owner. All fecal samples were examined with the Giardia plate ELISA (IDEXX Laboratories) for parasite antigen. Multivariable logistic regression analyses were conducted on the survey data to investigate putative risk factors for Giardia infection. Overall, 11.8% (95% CI: 9.2-15.1%) of samples tested positive for Giardia antigen. Results from the multivariable logistic regression analyses identified an interaction between dog age and spay/neuter status that was significantly associated with Giardia infection. The odds of infection were greater in intact as compared to neutered adult dogs (OR: 3.6, 95% CI: 1.7-7.9, p = 0.001), and in neutered juvenile dogs as compared to neutered adults (OR: 5.2, 95% CI: 2.2-12.2, p < 0.001). The results provide veterinarians with evidence-based information for identifying dogs at greatest risk of Giardia infection in southern Ontario.
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Affiliation(s)
- Shannon K French
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, 50 Stone Rd E, Guelph, Ontario N1G 2W1, Canada
| | - Jonathon D Kotwa
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, 50 Stone Rd E, Guelph, Ontario N1G 2W1, Canada
| | - Bilawal Singh
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, 50 Stone Rd E, Guelph, Ontario N1G 2W1, Canada
| | - Tyler Greer
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, 50 Stone Rd E, Guelph, Ontario N1G 2W1, Canada
| | - David L Pearl
- Department of Population Medicine, Ontario Veterinary College, University of Guelph, 50 Stone Rd E, Guelph, Ontario N1G 2W1, Canada
| | - David A Elsemore
- IDEXX Laboratories Inc., One IDEXX Drive, Westbrook, ME 04092, United States
| | - Rita Hanna
- IDEXX Laboratories Inc., One IDEXX Drive, Westbrook, ME 04092, United States
| | - Claire M Jardine
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, 50 Stone Rd E, Guelph, Ontario N1G 2W1, Canada; Canadian Wildlife Health Cooperative, Ontario Veterinary College, University of Guelph, 50 Stone Rd E, Guelph, Ontario N1G 2W1, Canada
| | - J Scott Weese
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, 50 Stone Rd E, Guelph, Ontario N1G 2W1, Canada
| | - Nicola Mercer
- Wellington-Dufferin-Guelph Public Health, Guelph, Ontario N1G 0E1, Canada
| | - Andrew S Peregrine
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, 50 Stone Rd E, Guelph, Ontario N1G 2W1, Canada.
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13
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SASAKI R, OKUMA I, ASARI Y. Response of wild rodents to red fox feces: implication for the echinococcus infection. J Vet Med Sci 2023; 85:565-570. [PMID: 36990791 PMCID: PMC10209468 DOI: 10.1292/jvms.22-0395] [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: 08/24/2022] [Accepted: 03/20/2023] [Indexed: 03/30/2023] Open
Abstract
Echinococcus multilocularis causes zoonotic disease, alveolar echinococcosis. The life cycle of E. multilocularis is maintained by the predator-prey relationship between red foxes and rodents. Infection to red fox (Vulpes vulpes) of E. multilocularis is considered that rodents take eggs of E. multilocularis, then red fox forage the rodents. However, it has been not known how to take eggs by rodents. On infection process of E. multilocularis from red foxes to rodents, we predicted that rodents would forage or touch with feces of red fox to use undigested materials within the feces. We monitored rodent's response to fox feces and their distance to the feces by using camera trap from May to October 2020. Myodes spp. and Apodemus spp. touched fox feces, and touch rate of Apodemus spp. was significantly higher than that of Myodes spp. We found smelling and passing as contact behaviors to fox feces by Myodes spp., while Apodemus spp. showed behaviors which oral directly contacted feces. There was no significant difference on the shortest distance between Apodemus spp. and Myodes spp. The distance between 0 cm and 5 cm was mostly observed for both rodents. The results that Myodes spp. did not forage feces and their contact to feces was low frequency suggested that the infection from red foxes to Myodes spp., the main intermediate host, was to be other pathways. The approach to feces and the act near feces might increase the probability attached with eggs.
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Affiliation(s)
- Rina SASAKI
- Laboratory of Wildlife Ecology, Obihiro University of Agriculture and Veterinary Medicine, Hokkaido, Japan
| | - Isao OKUMA
- Green and Flower Center, Zoukei Inc., Hokkaido, Japan
| | - Yushin ASARI
- Laboratory of Wildlife Ecology, Obihiro University of Agriculture and Veterinary Medicine, Hokkaido, Japan
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14
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Santa MA, Umhang G, Klein C, Grant DM, Ruckstuhl KE, Musiani M, Gilleard JS, Massolo A. It's a small world for parasites: evidence supporting the North American invasion of European Echinococcus multilocularis. Proc Biol Sci 2023; 290:20230128. [PMID: 36883278 PMCID: PMC9993045 DOI: 10.1098/rspb.2023.0128] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2023] Open
Abstract
Echinococcus multilocularis (Em), the causative agent of human alveolar echinococcosis (AE), is present in the Holarctic region, and several genetic variants deem to have differential infectivity and pathogenicity. An unprecedented outbreak of human AE cases in Western Canada infected with a European-like strain circulating in wild hosts warranted assessment of whether this strain was derived from a recent invasion or was endemic but undetected. Using nuclear and mitochondrial markers, we investigated the genetic diversity of Em in wild coyotes and red foxes from Western Canada, compared the genetic variants identified to global isolates and assessed their spatial distribution to infer possible invasion dynamics. Genetic variants from Western Canada were closely related to the original European clade, with lesser genetic diversity than that expected for a long-established strain and spatial genetic discontinuities within the study area, supporting the hypothesis of a relatively recent invasion with various founder events.
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Affiliation(s)
- Maria A. Santa
- Department of Biological Sciences, Faculty of Science, University of Calgary, Calgary, Alberta, Canada
| | - Gerald Umhang
- Nancy Laboratory for Rabies and Wildlife, National Reference Laboratory for Echinococcus spp., Wildlife Surveillance and Eco-epidemiology Unit, ANSES, Technopôle Agricole et Vétérinaire, Malzéville, France
| | - Claudia Klein
- Department of Clinical and Veterinary Clinical Sciences, Faculty of Veterinary Medicine, University of Calgary, Calgary, Alberta, Canada
- Friedrich-Loeffler-Institut, Bundesforschungsinstitut für Tiergesundheit, Federal Research Institute for Animal Health, Neustadt, Germany
| | - Danielle M. Grant
- Department of Clinical and Veterinary Clinical Sciences, Faculty of Veterinary Medicine, University of Calgary, Calgary, Alberta, Canada
- NORCE Climate, NORCE Norwegian Research Centre, Bjerknes Centre for Climate Research, Bergen, Norway
| | - Kathreen E. Ruckstuhl
- Department of Biological Sciences, Faculty of Science, University of Calgary, Calgary, Alberta, Canada
| | - Marco Musiani
- Department of Biological Sciences, Faculty of Science, University of Calgary, Calgary, Alberta, Canada
- Dipartimento di Scienze Biologiche, Geologiche e Ambientali (BiGeA), University of Bologna, Italy
| | - John S. Gilleard
- Department of Comparative Biology & Experimental Medicine, Host-Parasite Interactions (HPI) program, Faculty of Veterinary Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Alessandro Massolo
- Ethology Unit, Department of Biology, University of Pisa, Pisa, Italy
- UMR CNRS 6249 Chrono-environnement, Université Bourgogne Franche-Comté, Besançon, France
- Faculty of Veterinary Medicine, University of Calgary, Calgary, Alberta, Canada
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15
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Canine Alveolar Echinococcosis: An Emerging and Costly Introduced Problem in North America. Transbound Emerg Dis 2023. [DOI: 10.1155/2023/5224160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
Alveolar echinococcosis (AE), caused by the metacestode of Echinococcus multilocularis, is emerging in both dogs and people in North America. Here, we review 27 cases of canine AE opportunistically reported since the index case was described in 2009 in Western Canada. We describe clinical presentation, diagnosis, treatment, outcome, and source of canine infection, based on genetics of the parasite isolated from some canine cases. Diagnosis of AE was by histopathology and/or PCR on DNA extracted from metacestodes. The median age of dogs at diagnosis was 4 years (range 1–12), which is low compared to neoplasia, the most common differential diagnosis. There was no sex predilection and different breeds were involved, but there were a disproportionate number of boxers and beagles relative to their representation in the general canine population. The most common potential risk factors included contact with wildlife and visits to off leash areas. Abdominal distension was the most common clinical sign at presentation, and medical imaging generally revealed an abdominal mass. On histopathology, protoscoleces were observed in 7 out of 14 dogs. In 7 cases, DNA sequences were most similar to European (versus North American) haplotypes, identical to those recently reported in coyotes as definitive hosts in North America, and different between eastern and western North America, implying multiple introduction events. Dogs that were not treated (n = 6) had 16% survival in the first 100 days in comparison with 82% survival of treated dogs (n = 11). Direct costs to the owner of treating canine AE ranged from 1,317 to 12,655 CAD depending on the situation at the onset of treatment. This study provides important clinical, epidemiological, and economic information for veterinary practitioners and regulators for importation of dogs, and for public health, as dogs with AE may serve as indicators of parasite range expansion and risk to humans.
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16
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Mubareka S, Amuasi J, Banerjee A, Carabin H, Copper Jack J, Jardine C, Jaroszewicz B, Keefe G, Kotwa J, Kutz S, McGregor D, Mease A, Nicholson L, Nowak K, Pickering B, Reed MG, Saint-Charles J, Simonienko K, Smith T, Scott Weese J, Jane Parmley E. Strengthening a One Health approach to emerging zoonoses. Facets (Ott) 2023. [DOI: 10.1139/facets-2021-0190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Given the enormous global impact of the COVID-19 pandemic, outbreaks of highly pathogenic avian influenza in Canada, and manifold other zoonotic pathogen activity, there is a pressing need for a deeper understanding of the human-animal-environment interface and the intersecting biological, ecological, and societal factors contributing to the emergence, spread, and impact of zoonotic diseases. We aim to apply a One Health approach to pressing issues related to emerging zoonoses, and propose a functional framework of interconnected but distinct groups of recommendations around strategy and governance, technical leadership (operations), equity, education and research for a One Health approach and Action Plan for Canada. Change is desperately needed, beginning by reorienting our approach to health and recalibrating our perspectives to restore balance with the natural world in a rapid and sustainable fashion. In Canada, a major paradigm shift in how we think about health is required. All of society must recognize the intrinsic value of all living species and the importance of the health of humans, other animals, and ecosystems to health for all.
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Affiliation(s)
| | - John Amuasi
- Kwame Nkrumah University of Science and Technology, Kumasi, Ashanti Region, Ghana
| | | | | | - Joe Copper Jack
- Indigenous Knowledge Holder, Whitehorse, Yukon Territory, Canada
| | | | | | - Greg Keefe
- University of Prince Edward Island, Charlottetown, Prince Edward Island, Canada
| | | | - Susan Kutz
- University of Calgary, Calgary, Alberta, Canada
| | | | - Anne Mease
- Selkirk First Nation Citizen, Selkirk First Nation, Yukon Territory, Canada
| | | | | | - Brad Pickering
- Canadian Food Inspection Agency, Winnipeg, Manitoba, Canada
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17
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Feitosa NM, Nóbrega RH. Editorial: Animal models for pharmacological investigation of treatments and diagnostics for diseases. Front Cell Dev Biol 2022; 10:1023512. [PMID: 36263008 PMCID: PMC9574355 DOI: 10.3389/fcell.2022.1023512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Accepted: 08/31/2022] [Indexed: 11/13/2022] Open
Affiliation(s)
- Natália Martins Feitosa
- Integrated Laboratory of Translational Biosciences (LIBT), Institute of Biodiversity and Sustainability (NUPEM), Federal University of Rio de Janeiro, Macaé, Rio de Janeiro, Brazil
- *Correspondence: Natália Martins Feitosa,
| | - Rafael Henrique Nóbrega
- Reproductive and Molecular Biology Group, Department of Structural and Functional Biology, Institute of Biosciences, São Paulo State University (UNESP), Botucatu, Brazil
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18
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Robbins WT, Galeuzzi O, Graham K, Greenwood SJ, Jones MEB, Buote M, Conboy GA. Echinococcus multilocularis infection in a red fox (Vulpes vulpes) on Prince Edward Island, Canada. THE CANADIAN VETERINARY JOURNAL = LA REVUE VETERINAIRE CANADIENNE 2022; 63:962-966. [PMID: 36060492 PMCID: PMC9377194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
OBJECTIVE Molecular identification of small cestodes, morphologically consistent with Echinococcus multilocularis, recovered at necropsy from the gastrointestinal tract contents of a red fox, was accomplished by PCR using published species-specific n ad1 primers and methods. ANIMAL Red fox (Vulpes vulpes). PROCEDURE Small cestodes recovered from intestinal contents of a red fox trapped on Prince Edward Island in December 2020 (frozen at -20°C before being processed for parasite recovery in June 2021) were morphologically identified. Species identity confirmation and haplotyping of the cestodes were done via PCR and DNA sequencing of the n ad1, nad2, and cob genes. RESULTS Small cestodes morphologically consistent with E. multilocularis were detected in the gastrointestinal tract contents of a red fox trapped near Montague, PEI. The species identity was confirmed via PCR. Haplotyping revealed that they were of the European E1 haplotype. CONCLUSION In Canada, E. multilocularis has been reported as far east as Québec, with most reports being in central and western provinces and territories. This is the first report of E. multilocularis infection in a canid host east of Ontario, Canada and illustrates the need for regular wildlife disease surveillance to enhance our understanding of emerging pathogens of veterinary and medical importance. CLINICAL RELEVANCE Echinococcus multilocularis is a highly pathogenic zoonotic cestode from the family Taeniidae that can cause alveolar echinococcosis (AE) when rodents, dogs, horses, pigs, non-human primates, or humans ingest its eggs. Alveolar echinococcosis is challenging to treat, and survival rates for untreated individuals are low.
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Affiliation(s)
- William T Robbins
- Department of Biomedical Sciences (Robbins, Greenwood), Department of Pathology and Microbiology (Galeuzzi, Graham, Jones, Buote, Conboy), Canadian Wildlife Health Cooperative (Graham, Jones), University of Prince Edward Island, Atlantic Veterinary College, 550 University Avenue, Charlottetown, Prince Edward Island C1A 4P3, Canada
| | - Olivia Galeuzzi
- Department of Biomedical Sciences (Robbins, Greenwood), Department of Pathology and Microbiology (Galeuzzi, Graham, Jones, Buote, Conboy), Canadian Wildlife Health Cooperative (Graham, Jones), University of Prince Edward Island, Atlantic Veterinary College, 550 University Avenue, Charlottetown, Prince Edward Island C1A 4P3, Canada
| | - Kylee Graham
- Department of Biomedical Sciences (Robbins, Greenwood), Department of Pathology and Microbiology (Galeuzzi, Graham, Jones, Buote, Conboy), Canadian Wildlife Health Cooperative (Graham, Jones), University of Prince Edward Island, Atlantic Veterinary College, 550 University Avenue, Charlottetown, Prince Edward Island C1A 4P3, Canada
| | - Spencer J Greenwood
- Department of Biomedical Sciences (Robbins, Greenwood), Department of Pathology and Microbiology (Galeuzzi, Graham, Jones, Buote, Conboy), Canadian Wildlife Health Cooperative (Graham, Jones), University of Prince Edward Island, Atlantic Veterinary College, 550 University Avenue, Charlottetown, Prince Edward Island C1A 4P3, Canada
| | - Megan E B Jones
- Department of Biomedical Sciences (Robbins, Greenwood), Department of Pathology and Microbiology (Galeuzzi, Graham, Jones, Buote, Conboy), Canadian Wildlife Health Cooperative (Graham, Jones), University of Prince Edward Island, Atlantic Veterinary College, 550 University Avenue, Charlottetown, Prince Edward Island C1A 4P3, Canada
| | - Melanie Buote
- Department of Biomedical Sciences (Robbins, Greenwood), Department of Pathology and Microbiology (Galeuzzi, Graham, Jones, Buote, Conboy), Canadian Wildlife Health Cooperative (Graham, Jones), University of Prince Edward Island, Atlantic Veterinary College, 550 University Avenue, Charlottetown, Prince Edward Island C1A 4P3, Canada
| | - Gary A Conboy
- Department of Biomedical Sciences (Robbins, Greenwood), Department of Pathology and Microbiology (Galeuzzi, Graham, Jones, Buote, Conboy), Canadian Wildlife Health Cooperative (Graham, Jones), University of Prince Edward Island, Atlantic Veterinary College, 550 University Avenue, Charlottetown, Prince Edward Island C1A 4P3, Canada
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19
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Liu Z, Guo X, Guo A, Zhang S, Zou Y, Wang Y, Li X, He W, Pu L, Zhang S, Zeng Q, Cai X, Wang S. HIV protease inhibitor nelfinavir is a potent drug candidate against echinococcosis by targeting Ddi1-like protein. EBioMedicine 2022; 82:104177. [PMID: 35843171 PMCID: PMC9294487 DOI: 10.1016/j.ebiom.2022.104177] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 06/15/2022] [Accepted: 07/04/2022] [Indexed: 11/30/2022] Open
Abstract
Background Alveolar echinococcosis (AE), which is caused by larval Echinococcus multilocularis, is one of the world's most dangerous neglected diseases. Currently, no fully effective treatments are available to cure this disease. Methods In vitro protoscolicidal assay along with in vivo murine models was applied in repurposing drugs against AE. Genome-wide identification and homology-based modeling were used for predicting drug targets. RNAi, enzyme assay, and RNA-Seq analyses were utilized for investigating the roles in parasite survival and validations for the drug target. Findings We identified nelfinavir as the most effective HIV protease inhibitor against larval E. multilocularis. Once-daily oral administration of nelfinavir for 28 days resulted in a remarkable reduction in parasite infection in either immune-competent or immunocompromised mice. E. multilocularis DNA damage-inducible 1 protein (EmuDdi1) is predicted as a target candidate for nelfinavir. We proved that EmuDdi1 is essential for parasite survival and protein excretion and acts as a functionally active protease for this helminth. We found nelfinavir is able to inhibit the proteolytic activity of recombinant EmuDdi1 and block the EmuDdi1-related pathways for protein export. With other evidence of drug efficacy comparison, our results suggest that inhibition of EmuDdi1 is a mechanism by which this HIV proteinase inhibitor mediates its antiparasitic action on echinococcosis. Interpretation This study demonstrates that nelfinavir is a promising candidate for treating echinococcosis. This drug repurposing study proves that the widely prescribed drug for AIDS treatment is potent in combating E. multilocularis infection and thus provides valuable insights into the development of single-drug therapy for highly prevalent co-infection between HIV and helminth diseases. Funding This work was supported by the National Natural Science Foundation of China (31802179), the Natural Science Foundation of Gansu Province, China (No. 21JR7RA027), and the State Key Laboratory of Veterinary Etiological Biology (No. SKLVEB2021YQRC01).
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20
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Kuroki K, Morishima Y, Dorr L, Cook CR. Alveolar echinococcosis in a dog in Missouri, USA. J Vet Diagn Invest 2022; 34:746-751. [PMID: 35678137 DOI: 10.1177/10406387221104754] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
A 10-y-old, castrated male Boxer dog that was born and had lived in Missouri without any travel history to other states, except for a few trips to Kansas, was presented with a distended abdomen and declined health. Ultrasonographic examination revealed a large hepatic mass, and the dog was euthanized. A postmortem examination revealed that the left liver lobes were largely replaced by a white-to-tan multilobular mass with a cobblestone surface. The lesion also involved the diaphragm. Histologically, hepatic architecture was effaced by large areas of necrosis with numerous, ≤0.2-cm, cystic structures that stained positively with periodic acid-Schiff stain and contained calcareous corpuscles. Gross and microscopic hepatic lesions were compatible with alveolar echinococcosis (AE) caused by Echinococcus multilocularis. PCR examination confirmed E. multilocularis, and results from genotyping were consistent with the E4 haplotype. To our knowledge, this is only the second canine AE case and the third pet dog that has been confirmed to be infected by E. multilocularis in the contiguous United States. E. multilocularis is a serious health risk for both pet dogs and humans.
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Affiliation(s)
- Keiichi Kuroki
- Department of Veterinary Pathobiology, Veterinary Medical Diagnostic Laboratory
| | - Yasuyuki Morishima
- University of Missouri, Columbia, MO, USA; Department of Parasitology, National Institute of Infectious Diseases, Tokyo, Japan
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21
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Porter E, Seguin MA, Estrada M, Szlosek D, Massolo A, Visscher DR. Assessing the potential for infections of Echinococcus multilocularis in dogs in a hotspot of human alveolar echinococcosis infections in North America. Vet Parasitol Reg Stud Reports 2022; 29:100704. [PMID: 35256128 DOI: 10.1016/j.vprsr.2022.100704] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 12/23/2021] [Accepted: 02/07/2022] [Indexed: 11/18/2022]
Abstract
Echinococcus multilocularis is a zoonotic tapeworm, whose metacestode larval stage is the etiological agent for alveolar echinococcosis in humans and is a parasite of emerging concern according to the World Health Organization which is difficult to diagnose and has a case mortality rate of >90% when left untreated. Echinococcus multilocularis requires two mammalian hosts to complete its lifecycle: wild and domestic canids as definitive hosts, and small mammals (mostly rodents) as intermediate ones. Because of their close relations with humans, domestic dogs have been indicated as a mean of infection to people. Human alveolar echinococcosis has historically been rare in North America, however, since 2013, at least seventeen diagnoses have been confirmed in Alberta, Canada. Because of this unprecedented series of cases, assessing the frequency of infections in dogs in Alberta is key to estimate risk for dog owners and animal health professionals. This study was carried out in Edmonton to determine the frequency of E. multilocularis infection in domestic dogs and potential risk factors. Fecal samples and corresponding behavior risk surveys were collected from 775 dogs in seven urban off-leash parks within Edmonton city limits during the summer of 2020. A quantitative PCR fecal test was used to diagnose E. multilocularis infection. We found a single case of E. multilocularis infection (1/775) and determined that the overall true prevalence was 0.2% (95% CrI: 0.0-0.7%) corrected for detection sensitivity and specificity. Overall, these findings confirm the presence of E. multilocularis infection in domestic dogs in Edmonton although further work is required to fully understand the risk factors that may contribute to infection and potential transmission to humans.
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Affiliation(s)
- Emilie Porter
- Department of Biology, The King's University, 9125 50 Street NW, Edmonton, AB T6B 2H3, Canada
| | - M Alexis Seguin
- IDEXX Reference Laboratories, Inc, Westbrook, ME 04092, United States of America
| | - Marko Estrada
- IDEXX Reference Laboratories, Inc, Westbrook, ME 04092, United States of America
| | - Donald Szlosek
- IDEXX Reference Laboratories, Inc, Westbrook, ME 04092, United States of America
| | - Alessandro Massolo
- Ethology Unit, Department of Biology, University of Pisa, Via Volta 6, 56126 Pisa, Italy; Department of Ecosystem and Public Health, Faculty of Veterinary Medicine, University of Calgary, 2500 University Dr NW, Calgary, Alberta T2N 1N4, Canada; UMR CNRS 6249 Chrono-environnement, Université Bourgogne Franche-Comté, 16 Route de Gray, 25030 Besançon, France
| | - Darcy R Visscher
- Department of Biology, The King's University, 9125 50 Street NW, Edmonton, AB T6B 2H3, Canada; Biological Sciences, University of Alberta, CW405 Biological Sciences Bldg., Edmonton, AB T6G 2E9, Canada; Naturalis Biodiversity Center, Darwinweg 2, 2333CR Leiden, the Netherlands.
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22
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Liu T, Li H, Li Y, Wang L, Chen G, Pu G, Guo X, Cho WC, Fasihi Harandi M, Zheng Y, Luo X. Integrative Analysis of RNA Expression and Regulatory Networks in Mice Liver Infected by Echinococcus multilocularis. Front Cell Dev Biol 2022; 10:798551. [PMID: 35399512 PMCID: PMC8989267 DOI: 10.3389/fcell.2022.798551] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Accepted: 02/17/2022] [Indexed: 11/13/2022] Open
Abstract
The larvae of Echinococcus multilocularis causes alveolar echinococcosis, which poses a great threat to the public health. However, the molecular mechanisms underlying the host and parasite interactions are still unclear. Exploring the transcriptomic maps of mRNA, miRNA and lncRNA expressed in the liver in response to E. multilocularis infection will help us to understand its pathogenesis. Using liver perfusion, different cell populations including the hepatic cells, hepatic stellate cells and Kupffer cells were isolated from mice interperitoneally inoculated with protoscoleces. Their transcriptional profiles including lncRNAs, miRNAs and mRNAs were done by RNA-seq. Among these cell populations, the most differentially-expressed (DE) mRNA, lncRNAs and miRNAs were annotated and may involve in the pathological processes, mainly including metabolic disorders, immune responses and liver fibrosis. Following the integrative analysis of 38 differentially-expressed DEmiRNAs and 8 DElncRNAs, the lncRNA-mRNA-miRNA networks were constructed, including F63-miR-223-3p-Fbxw7/ZFP36/map1b, F63-miR-27-5p-Tdrd6/Dip2c/Wdfy4 and IFNgAS1-IFN-γ. These results unveil the presence of several potential lncRNA-mRNA-miRNA axes during E. multilocularis infection, and further exploring of these axes may contribute to better understanding of the pathogenic mechanisms.
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Affiliation(s)
- Tingli Liu
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, CAAS, Lanzhou, China
| | - Hong Li
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, CAAS, Lanzhou, China
| | - Yanping Li
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, CAAS, Lanzhou, China
| | - Liqun Wang
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, CAAS, Lanzhou, China
| | - Guoliang Chen
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, CAAS, Lanzhou, China
| | - Guiting Pu
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, CAAS, Lanzhou, China
| | - Xiaola Guo
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, CAAS, Lanzhou, China
| | - William C. Cho
- Department of Clinical Oncology, Queen Elizabeth Hospital, Hong Kong SAR, China
| | - Majid Fasihi Harandi
- Research Center for Hydatid Disease in Iran, Kerman University of Medical Sciences, Kerman, Iran
| | - Yadong Zheng
- Key Laboratory of Applied Technology on Green-Eco-Healthy Animal Husbandry of Zhejiang Province, Zhejiang International Science and Technology Cooperation Base for Veterinary Medicine and Health Management, Zhejiang Provincial Engineering Laboratory for Animal Health Inspection and Internet Technology, Zhejiang International Science and Technology Cooperation Base for Veterinary Medicine and Health Management, China-Australia Joint Laboratory for Animal Health Big Data Analytics, College of Animal Science and Technology and College of Veterinary Medicine of Zhejiang A&F University, Hangzhou, China
- *Correspondence: Xuenong Luo, ; Yadong Zheng,
| | - Xuenong Luo
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, CAAS, Lanzhou, China
- *Correspondence: Xuenong Luo, ; Yadong Zheng,
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23
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Klein CD, Lavallée JM, Morimoto CY. Pathology in Practice. J Am Vet Med Assoc 2022; 260:1-3. [PMID: 35298398 DOI: 10.2460/javma.20.04.0209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- Colby D Klein
- Department of Veterinary Pathology, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, SK, Canada
| | - Justin M Lavallée
- Department of Small Animal Clinical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, SK, Canada
| | - Celina Y Morimoto
- Department of Small Animal Clinical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, SK, Canada
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24
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Kotwa JD, French SK, Greer T, Elsemore DA, Hanna R, Jardine CM, Pearl DL, Weese JS, Mercer N, Peregrine AS. Prevalence of intestinal parasites in dogs in southern Ontario, Canada, based on fecal samples tested using sucrose double centrifugation and Fecal Dx® tests. Vet Parasitol Reg Stud Reports 2021; 26:100618. [PMID: 34879930 DOI: 10.1016/j.vprsr.2021.100618] [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: 05/20/2021] [Revised: 07/26/2021] [Accepted: 08/12/2021] [Indexed: 11/29/2022]
Abstract
In southern Ontario, Canada, there is a lack of information concerning the prevalence of intestinal parasites in dogs. As such, this study aimed to characterize the prevalence of intestinal parasites in dogs visiting off-leash parks in the region using sucrose double centrifugation and Fecal Dx® tests. Additionally, data obtained via the sucrose double centrifugation method were used to evaluate the performance of the Fecal Dx® tests. Fecal samples were collected from 466 dogs aged ≥6 months from May to November 2018 (mean age = 3.7 years). Overall, eleven intestinal parasites were identified using sucrose double centrifugation. Roundworm eggs (Toxocara canis and Baylisascaris procyonis), hookworm eggs (Ancylostoma caninum and Uncinaria stenocephala), and whipworm eggs (Trichuris vulpis) were identified in 1.07% (95% confidence interval [CI] 0.38-2.56%), 5.79% (95% CI 3.85-8.31%), and 5.15% (95% CI 3.33-7.57) of samples, respectively. Using the Fecal Dx® tests, 1.07% (95% CI 0.38-2.56%), 4.29% (95% CI 2.64-6.55%), and 2.15% (95% CI 1.03-3.91) of the samples tested positive for roundworm, hookworm, and whipworm antigen, respectively. To assess the level of agreement between the Fecal Dx® tests and sucrose double centrifugation, three methods were used. Cohen's kappa indicated a fair-to-moderate level of agreement between Fecal Dx® tests and sucrose double centrifugation. In contrast, the prevalence-adjusted bias-adjusted kappa and Gwet's first-order agreement coefficient indicated almost perfect agreement between these tests, ranging from 0.87 to 0.99 among the parasites examined. This study provides valuable information on the prevalence of intestinal parasites in mature dogs in southern Ontario that will help guide parasite control recommendations for dogs in this region.
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Affiliation(s)
- Jonathon D Kotwa
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, 50 Stone Rd E, Guelph, Ontario N1G 2W1, Canada
| | - Shannon K French
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, 50 Stone Rd E, Guelph, Ontario N1G 2W1, Canada.
| | - Tyler Greer
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, 50 Stone Rd E, Guelph, Ontario N1G 2W1, Canada
| | - David A Elsemore
- IDEXX Laboratories Inc., One IDEXX Drive, Westbrook, ME 04092, United States
| | - Rita Hanna
- IDEXX Laboratories Inc., One IDEXX Drive, Westbrook, ME 04092, United States
| | - Claire M Jardine
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, 50 Stone Rd E, Guelph, Ontario N1G 2W1, Canada; Canadian Wildlife Health Cooperative, Ontario Veterinary College, University of Guelph, 50 Stone Rd E, Guelph, Ontario N1G 2W1, Canada
| | - David L Pearl
- Department of Population Medicine, Ontario Veterinary College, University of Guelph, 50 Stone Rd E, Guelph, Ontario N1G 2W1, Canada
| | - J Scott Weese
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, 50 Stone Rd E, Guelph, Ontario N1G 2W1, Canada
| | - Nicola Mercer
- Wellington-Dufferin-Guelph Public Health, Guelph, Ontario N1G 0E1, Canada
| | - Andrew S Peregrine
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, 50 Stone Rd E, Guelph, Ontario N1G 2W1, Canada.
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25
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Santa MA, Musiani M, Ruckstuhl KE, Massolo A. A review on invasions by parasites with complex life cycles: the European strain of Echinococcus multilocularis in North America as a model. Parasitology 2021; 148:1532-1544. [PMID: 35060461 PMCID: PMC8564803 DOI: 10.1017/s0031182021001426] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Revised: 07/14/2021] [Accepted: 07/30/2021] [Indexed: 12/28/2022]
Abstract
In a fast-changing and globalized world, parasites are moved across continents at an increasing pace. Co-invasion of parasites and their hosts is leading to the emergence of infectious diseases at a global scale, underlining the need for integration of biological invasions and disease ecology research. In this review, the ecological and evolutionary factors influencing the invasion process of parasites with complex life cycles were analysed, using the invasion of the European strain of Echinococcus multilocularis in North America as a model. The aim was to propose an ecological framework for investigating the invasion of parasites that are trophically transmitted through predator–prey interactions, showing how despite the complexity of the cycles and the interactions among multiple hosts, such parasites can overcome multiple barriers and become invasive. Identifying the key ecological processes affecting the success of parasite invasions is an important step for risk assessment and development of management strategies, particularly for parasites with the potential to infect people (i.e. zoonotic).
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Affiliation(s)
- Maria A. Santa
- Department of Biology, University of Calgary, AlbertaT2N 1N4, Canada
| | - Marco Musiani
- Department of Biology, University of Calgary, AlbertaT2N 1N4, Canada
| | | | - Alessandro Massolo
- Department of Ecosystem and Public Health, Faculty of Veterinary Medicine, University of Calgary, AlbertaT2N 4Z6, Canada
- Ethology Unit, Department of Biology, University of Pisa, Pisa, 56126, Italy
- UMR CNRS 6249 Chrono-Environnement, Université Bourgogne Franche-Comté, Besançon, 25030, France
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26
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Gottstein B, Deplazes P. Alveolar echinococcosis: what triggers emergence in North America, Central Europe and Asia? Curr Opin Infect Dis 2021; 34:440-446. [PMID: 34524197 DOI: 10.1097/qco.0000000000000765] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
PURPOSE OF REVIEW Infection with the larval (metacestode) stage of Echinococcus multilocularis causes alveolar echinococcosis (AE), a serious hepatic disorder. The parasite has increased its infection extensity in wildlife and domestic dogs, mainly due to urbanization and spatial extension of wildlife hosts in Europe, Asia as well as North America, resulting in emerging infection risk for humans. RECENT FINDINGS In hyperendemic areas such as Kyrgyzstan and China, ecological and socioeconomic changes have been associated with the unpredictable increase of AE cases. In North America, the appearance of the European-like genotype is of concern. In Europe, the annual increase of human case numbers reached a plateau even in hyperendemic situations. Therefore, we conclude that most of the exposed individuals are resistant to parasite invasion and/or to disease development. Thus, AE develops in a few healthy individuals, but preferentially in immunosuppressed patients. SUMMARY In the future, improved diagnostic strategies will allow more precise estimations of transmission routes including the role of food, water and direct dog contact, which should yield improved public health recommendations. Finally, understanding protective innate and acquired immune mechanisms as well as parasite-driven immune-evasion processes will be essential to develop curative therapies in nonoperable patients and, futuristically, appropriate vaccines.
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Affiliation(s)
- Bruno Gottstein
- Institute of Infectious Diseases, Faculty of Medicine, University of Bern, Bern
| | - Peter Deplazes
- Institute of Parasitology, Vetsuisse Faculty and Faculty of Medicine, University of Zurich, Zurich, Switzerland
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27
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Bernstein LA, Shaffer C, Walz E, Moore S, Sparks A, Stone S, Roerick T, Larsen PA, Wolf TM. Exploring Risk for Echinococcosis Spillover in Northern Minnesota Tribal Communities. ECOHEALTH 2021; 18:169-181. [PMID: 34508275 DOI: 10.1007/s10393-021-01547-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2020] [Accepted: 07/16/2021] [Indexed: 06/13/2023]
Abstract
Echinococcus spp. are zoonotic cestode parasites with a worldwide distribution and a complex, two-host life cycle involving carnivore definitive hosts and small mammal or ungulate intermediate hosts. Surveillance for Echinococcus spp. in the Midwestern United States (USA) is rare. Using a mixed-methods approach, we examined Echinococcus infection risks in wildlife and domestic dogs in four Minnesota Tribal Nations. We hypothesized that the spillover of Echinococcus spp. into domestic dogs would vary with the presence or absence of suspected wildlife host species and certain behaviors associated with domestic dog ownership, like feeding wildlife host carcasses or frequency of veterinary care. Among 83 dogs tested, three (3.6%) were positive for Echinococcus spp. Despite low prevalence, pet owner survey and focus group findings indicated that dogs encounter peri-domestic wildlife most often when they roam freely or consume wildlife carcasses. This study demonstrates a need for further research into spillover potential of endemic zoonotic Echinococcus spp. in the Midwest USA.
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Affiliation(s)
- Lauren A Bernstein
- Veterinary Clinical Sciences Department, College of Veterinary Medicine, University of Minnesota, 1365 Gortner Ave, St. Paul, MN, 55108, USA.
| | | | - Emily Walz
- Department of Veterinary and Biomedical Sciences, College of Veterinary Medicine, University of Minnesota, St. Paul, MN, USA
| | - Seth Moore
- Department of Biology and the Environment, Grand Portage Band of Lake Superior Chippewa, Grand Portage, MN, USA
| | - Amy Sparks
- A Visual Spark Graphic Recording, Minneapolis, MN, USA
| | - Suzanne Stone
- Department of Veterinary and Biomedical Sciences, College of Veterinary Medicine, University of Minnesota, St. Paul, MN, USA
| | - Tanya Roerick
- Division of Resources Management, Leech Lake Band of Ojibwe, Cass Lake, MN, USA
| | - Peter A Larsen
- Department of Veterinary and Biomedical Sciences, College of Veterinary Medicine, University of Minnesota, St. Paul, MN, USA
| | - Tiffany M Wolf
- Department of Veterinary Population Medicine, College of Veterinary Medicine, University of Minnesota, St. Paul, MN, USA
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28
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Julien DA, Sargeant JM, Filejski C, Harper SL. Who let the dogs In? An epidemiological study quantifying domestically sourced and imported dogs in Southern Ontario, Canada. Zoonoses Public Health 2021; 68:588-600. [PMID: 33987921 DOI: 10.1111/zph.12847] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Revised: 02/25/2021] [Accepted: 04/25/2021] [Indexed: 11/28/2022]
Abstract
Dogs are reservoirs for many zoonoses. In southern Ontario, Canada, minimal data exist on the sources from which domestic dogs are acquired (i.e., domestic or imported). The objectives of this study were to (1) describe the proportions of domestically sourced and imported dogs in southern Ontario, Canada, (2) describe the characteristics of newly acquired dogs including their province/country of origin, accompanying health documentation and respondent opinion regarding disease risks from different sources, and (3) determine whether a difference in the proportion of imported dogs exists between rural and urban households in southern Ontario, Canada. We conducted a cross-sectional observational study using an online questionnaire. A total of 2,006 respondents (1,002 rural and 1,004 urban), each representing one household, participated. Over the previous seven-year period, 731 (36.44%, (731/2,006)) respondents domestically sourced at least one dog, with 684 providing information regarding 962 dogs. Domestically sourced dogs were frequently puppies three to five-month-old (25.05%, (241/962)), male (51.87%, (499/962)), from a breeder (30.98%, (298/962)), and sourced from within Ontario (92.93%, (894/962)). As self-reported by respondents, 63.52% (484/762) of domestically sourced dogs greater than 3 months were vaccinated against rabies. Over the same period, individuals from 55 of 2,006 households (2.74%) imported at least one dog. Imported dogs were frequently under three months of age (29.09%, 16/55)), male (58.18%, (32/55)), and found via a breeder (32.73%, (18/55)). Most imported dogs originated from the USA (52.73%, (29/55)). Rabies vaccination in dogs three months and older is provincially required in Ontario and is also required for canine importation into Canada; however, some imported dogs over three months were unvaccinated (7.69%, (3/39)). The odds ratio for importing at least one dog in urban households compared with rural households was 1.93 (95% CI: 1.03-3.62) when controlling for number of household occupants and gross household income.
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Affiliation(s)
- Danielle A Julien
- Department of Population Medicine, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada.,Centre for Public Health and Zoonoses, University of Guelph, Guelph, ON, Canada
| | - Jan M Sargeant
- Department of Population Medicine, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada.,Centre for Public Health and Zoonoses, University of Guelph, Guelph, ON, Canada
| | | | - Sherilee L Harper
- Department of Population Medicine, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada.,Centre for Public Health and Zoonoses, University of Guelph, Guelph, ON, Canada.,School of Public Health, University of Alberta, Edmonton, AL, Canada
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29
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Santa MA, Rezansoff AM, Chen R, Gilleard JS, Musiani M, Ruckstuhl KE, Massolo A. Deep amplicon sequencing highlights low intra-host genetic variability of Echinococcus multilocularis and high prevalence of the European-type haplotypes in coyotes and red foxes in Alberta, Canada. PLoS Negl Trop Dis 2021; 15:e0009428. [PMID: 34038403 PMCID: PMC8153462 DOI: 10.1371/journal.pntd.0009428] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Accepted: 04/30/2021] [Indexed: 01/04/2023] Open
Abstract
Echinococcus multilocularis (Em) is a zoonotic parasite considered a global emergent pathogen. Recent findings indicate that the parasite is expanding its range in North America and that European-type haplotypes are circulating in western Canada. However, genetic analyses are usually conducted only on a few parasites out of thousands of individuals within each definitive host, likely underestimating the prevalence of less common haplotypes. Moreover, mixed infections with several mtDNA haplotypes in the same host have been reported, but their relative abundance within the host was never estimated. We aimed to 1) estimate the frequency of co-infections of different Em haplotypes in coyotes (Canis latrans) and red foxes (Vulpes vulpes) from western Canada and their relative abundance within the definitive hosts, 2) detect less prevalent haplotypes by sampling a larger proportion of the parasite subpopulation per host, and 3) investigate differences in the distribution of Em haplotypes in these main definitive hosts; foxes and coyotes. We extracted DNA from ~10% of the worm subpopulation per host (20 foxes and 47 coyotes) and used deep amplicon sequencing (NGS technology) on four loci, targeting the most polymorphic regions from the mitochondrial genes cox1 (814 bp), nad1 (344 bp), and cob (387 bp). We detected the presence of mixed infections with multiple Em haplotypes and with different Echinococcus species including Em and E. granulosus s.l. genotypes G8/G10, low intraspecific diversity of Em, and a higher abundance of the European-type haplotypes in both hosts. Our results suggest a population expansion of the European over the North American strain in Alberta and a limited distribution of some European-type haplotypes. Our findings indicate that deep amplicon sequencing represents a valuable tool to characterize Em in multiple hosts, to assess the current distribution and possible origins of the European strain in North America. The potential use of next-generation sequencing technologies is particularly important to understand the patterns of geographic expansion of this parasite.
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Affiliation(s)
- Maria A. Santa
- Biological Sciences Department, Faculty of Science, University of Calgary, Calgary, Alberta, Canada
| | - Andrew M. Rezansoff
- Department of Comparative Biology and Experimental Medicine, Host Parasite Interactions (HPI) program, Faculty of Veterinary Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Rebecca Chen
- Department of Comparative Biology and Experimental Medicine, Host Parasite Interactions (HPI) program, Faculty of Veterinary Medicine, University of Calgary, Calgary, Alberta, Canada
| | - John S. Gilleard
- Department of Comparative Biology and Experimental Medicine, Host Parasite Interactions (HPI) program, Faculty of Veterinary Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Marco Musiani
- Biological Sciences Department, Faculty of Science, University of Calgary, Calgary, Alberta, Canada
| | - Kathreen E. Ruckstuhl
- Biological Sciences Department, Faculty of Science, University of Calgary, Calgary, Alberta, Canada
| | - Alessandro Massolo
- Department of Ecosystem and Public Health, Faculty of Veterinary Medicine, University of Calgary, Calgary, Alberta, Canada
- Ethology Unit, Department of Biology, University of Pisa, Pisa, Italy
- UMR CNRS 6249 Chrono-environnement, Université Bourgogne Franche-Comté, Besançon, France
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30
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Kotwa JD, Schnyder M, Jardine CM, Deplazes P, Pearl DL, Berke O, Mercer N, Peregrine AS. Investigation of the occurrence of Angiostrongylus vasorum in coyotes in southern Ontario, Canada. J Vet Diagn Invest 2021; 33:664-669. [PMID: 33890522 PMCID: PMC8225693 DOI: 10.1177/10406387211011990] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
In North America, the only endemic focus for Angiostrongylus
vasorum (French heartworm) was historically thought to occur in the
southeastern part of the island of Newfoundland. However, reports of A.
vasorum infection in wild canids in West Virginia, USA, and Nova
Scotia, Canada, suggest the introduction of the parasite to mainland North
America. We screened for A. vasorum in coyotes from across
southern Ontario. Additionally, we evaluated the performance of ELISAs for
detection of circulating A. vasorum antigen (Ag-ELISA) and
antibodies against A. vasorum (Ab-ELISA) designed for use in
sera or blood of foxes for use with coyotes in this region. Autopsies were
performed on 397 coyotes, and lung tissue extract prepared from each carcass was
tested via both ELISAs. The sensitivity and specificity for both tests were
estimated in the absence of a gold standard using a 2-test single population
Bayesian model; sensitivity and specificity priors were based on the performance
of the assays in foxes in Switzerland. Eight coyotes tested positive for
A. vasorum antigen; no animal was antibody positive. The
estimated sensitivity and specificity of the Ag-ELISA were 90.8% (95% credible
interval [CrI]: 83.8–95.6%) and 95.5% (95% CrI: 93.4–97.2%), respectively. For
the Ab-ELISA, the estimated sensitivity and specificity were 41.9% (95% CrI:
32.1–51.9%) and 98.0% (95% CrI: 96.3–99.0%), respectively. Based on these
findings and negative postmortem data for the same animals, there is
insufficient evidence to suggest the presence of A. vasorum in
southern Ontario coyotes.
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Affiliation(s)
| | - Manuela Schnyder
- Institute of Parasitology, University of Zurich, Zürich, Switzerland
| | - Claire M Jardine
- Departments of Pathobiology, Guelph, Ontario, Canada.,Canadian Wildlife Health Cooperative, Guelph, Ontario, Canada
| | - Peter Deplazes
- Institute of Parasitology, University of Zurich, Zürich, Switzerland
| | - David L Pearl
- Population Medicine, Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada
| | - Olaf Berke
- Population Medicine, Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada
| | - Nicola Mercer
- Wellington-Dufferin-Guelph Public Health, Guelph, Ontario, Canada
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31
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Kotwa JD, Greer T, Jardine CM, Weese JS, Isaksson M, Pearl DL, Berke O, Mercer N, Peregrine AS. Evaluation of the prevalence of Echinococcus multilocularis in dogs that visit off-leash dog parks in southern Ontario, Canada. Zoonoses Public Health 2020; 68:533-537. [PMID: 33336543 DOI: 10.1111/zph.12792] [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: 07/22/2020] [Revised: 10/30/2020] [Accepted: 11/02/2020] [Indexed: 11/30/2022]
Abstract
Prior to 2012, Echinococcus multilocularis was not known to occur in any host in Ontario, Canada. However, since that year, five cases of alveolar echinococcosis have been diagnosed in dogs that resided at the western end of Lake Ontario. In addition, E. multilocularis has been shown to be a common infection in wild canids (i.e. coyotes and foxes) across southern Ontario with a high-risk infection cluster in the area surrounding the western shores of Lake Ontario and northern shores of Lake Erie. In regions endemic for E. multilocularis, dog ownership is considered a risk factor for human alveolar echinococcosis. A study was therefore carried out to determine the prevalence of E. multilocularis intestinal infections in dogs within the high-risk infection cluster. From May to November 2018, faecal samples were collected from 477 dogs aged ≥6 months that visited 12 off-leash dog parks in the Halton, Hamilton and Niagara public health units. Faecal samples were analysed via a magnetic capture probe DNA extraction and real-time PCR method for E. multilocularis DNA. Overall, 0% (97.5% CI: 0%-0.80%) of samples tested positive. This result informs preventive recommendations for E. multilocularis infections in dogs in this region.
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Affiliation(s)
- Jonathon D Kotwa
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada
| | - Tyler Greer
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada
| | - Claire M Jardine
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada.,Canadian Wildlife Health Cooperative, Guelph, ON, Canada
| | - J Scott Weese
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada
| | | | - David L Pearl
- Department of Population Medicine, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada
| | - Olaf Berke
- Department of Population Medicine, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada
| | - Nicola Mercer
- Wellington-Dufferin-Guelph Public Health, Guelph, ON, Canada
| | - Andrew S Peregrine
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada
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Meyer A, Olias P, Schüpbach G, Henzi M, Barmettler T, Hentrich B, Gottstein B, Frey CF. Combined cross-sectional and case-control study on Echinococcus multilocularis infection in pigs in Switzerland. Vet Parasitol 2020; 277S:100031. [PMID: 32984810 PMCID: PMC7491148 DOI: 10.1016/j.vpoa.2020.100031] [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: 07/23/2020] [Revised: 09/02/2020] [Accepted: 09/05/2020] [Indexed: 12/26/2022]
Abstract
Minimal prevalence for Echinococcus multilocularis infection in Swiss domestic pigs was established. Minimal prevalence was 0.008% for fattening pigs and 0.11% for breeding pigs, respectively. All but one metacestode were degenerated; no protoscoleces were detected in histopathology. Main risk factors were foxes or other animals in the barns, no hygiene barrier, outdoor feeding and grass feeding. No geographical clusters of higher infection with E. multilocularis were evident.
The canid tapeworm Echinococcus multilocularis causes alveolar echinococcosis (AE) in humans and other intermediate hosts. Depending on the permissiveness of the intermediate host, the larval form of E. multilocularis (metacestode) may be either fertile, e.g. in rodents, and thus supporting the life cycle of the parasite, or infertile, e.g. in pigs, and thus interrupting the life cycle. Pigs have been shown to act as aberrant hosts for the metacestode and consequently develop liver lesions but represent a dead-end for the parasite. Routine liver inspection at slaughter provided the basis for a large-scale surveillance study on E. multilocularis infection in pigs. The aim of this combined cross-sectional and case-control study was to estimate the minimal prevalence of E. multilocularis in pigs in Switzerland, to find factors associated with infection, and to assess potential regional clusters of infection. During the 12-month-study period, approximately 85% of all pigs slaughtered in Switzerland were assessed. In total, 450 pig livers with macroscopic lesions suggestive of E. multilocularis infection were analysed. Of those, 200 samples were positive by E. multilocularis-PCR. Thus, the overall minimal prevalence detected by molecular means was 0.009% in all slaughter pigs (200 of 2'143'996), 0.008% in finishing pigs (177 of 2'123'542), and 0.11% in breeding pigs (22 of 20'454). Histology revealed the unique presence of a laminated layer in 105 cases, and an additional germinal layer detected in a single case. Protoscoleces could not be observed in any of the lesions. Factors positively associated with infection were "foxes seen in the pig shed", "foxes on premises", "presence of other animals in the shed", "absence of a hygiene barrier", "outdoor feeding", "feeding grass", "lack of rodent control", "not having own dogs on the farm" and "infrequent deworming of sows". Infection was present in all regions sampled and was representative of the important pig rearing areas of Switzerland, without evidence of any obvious geographical cluster. Conclusively, our study provided further evidence of widespread environmental contamination with E. multilocularis eggs in Switzerland. Furthermore, the absence of protoscoleces in any of the lesions supported the concept that pigs act only as a dead-end host and thus do not contribute to the life cycle of the parasite. Factors associated with E. multilocularis infection were in-line with parasite biology, and many can be addressed by increasing hygiene and management standards.
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Affiliation(s)
- Anika Meyer
- Institute of Parasitology, Department of Infectious Diseases and Pathobiology, Vetsuisse Faculty, University of Bern, Switzerland
| | - Philipp Olias
- Institute of Animal Pathology, Department of Infectious Diseases and Pathobiology, Vetsuisse Faculty, University of Bern, Switzerland
| | - Gertraud Schüpbach
- Veterinary Public Health Institute, Department of Clinical Research and Veterinary Public Health, Vetsuisse Faculty, University of Bern, Switzerland
| | - Martin Henzi
- Service de la sécurité alimentaire et des affaires vétérinaires SAAV, Inspectorat des viandes et abattoirs, Contrôle des viandes - Division Porcs, Courtepin, Switzerland
| | | | - Brigitte Hentrich
- Institute of Parasitology, Department of Infectious Diseases and Pathobiology, Vetsuisse Faculty, University of Bern, Switzerland
| | - Bruno Gottstein
- Institute of Parasitology, Department of Infectious Diseases and Pathobiology, Vetsuisse Faculty, University of Bern, Switzerland
| | - Caroline F Frey
- Institute of Parasitology, Department of Infectious Diseases and Pathobiology, Vetsuisse Faculty, University of Bern, Switzerland.
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Schurer JM, Tsybina P, Gesy KM, Kolapo TU, Skinner S, Hill JE, Jenkins EJ. Molecular Evidence for Local Acquisition of Human Alveolar Echinococcosis in Saskatchewan, Canada. J Infect Dis 2020; 223:1015-1018. [PMID: 32766836 DOI: 10.1093/infdis/jiaa473] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2020] [Accepted: 07/29/2020] [Indexed: 11/12/2022] Open
Abstract
Alveolar echinococcosis (AE) is a life-threatening parasitic disease caused by the zoonotic cestode Echinococcus multilocularis. Our goals were to confirm infection, identify species, and analyze biogeographical origin of metacestode tissues from a suspected human AE case in Saskatchewan, Canada. We conducted polymerase chain reaction (PCR) targeting the nad1 mitochondrial gene for E. multilocularis and the rrnS ribosomal RNA gene for E. granulosus and conducted haplotype analysis at the nad2 locus. Our analysis confirmed AE and indicated that sequences matched infected Saskatchewan coyotes and European E3/E4 haplotypes. The patient had no travel history outside North America. This suggests autochthonous transmission of a European-type strain.
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Affiliation(s)
- Janna M Schurer
- Center for One Health, University of Global Health Equity, Kigali, Rwanda.,Cummings School of Veterinary Medicine, Tufts University, North Grafton, Massachusetts, USA
| | - Polly Tsybina
- Department of Medicine, University of Saskatchewan, Saskatoon, Canada
| | - Karen M Gesy
- Department of Large Animal Clinical Sciences, University of Saskatchewan, Saskatoon, Canada
| | - Temitope U Kolapo
- Department of Veterinary Microbiology, University of Saskatchewan, Saskatoon, Canada
| | - Stuart Skinner
- Department of Infectious Disease, University of Saskatchewan, Saskatoon, Canada
| | - Janet E Hill
- Department of Veterinary Microbiology, University of Saskatchewan, Saskatoon, Canada
| | - Emily J Jenkins
- Department of Veterinary Microbiology, University of Saskatchewan, Saskatoon, Canada
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Joyce J, He XO, Rozovsky K, Stefanovici C, Fanella S. Disseminated Echinococcus multilocularis Infection without Liver Involvement in Child, Canada, 2018. Emerg Infect Dis 2020; 26:1856-1859. [PMID: 32687039 PMCID: PMC7392456 DOI: 10.3201/eid2608.191644] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
An immunocompetent child in Canada received a diagnosis of disseminated alveolar Echinococcusmultilocularis infection. The case lacked typical features of liver involvement and was possibly related to a rare congenital portosystemic shunt. We summarize the rapidly evolving epidemiology of E. multilocularis parasites in Canada.
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Zajac A, Fairman D, McGee E, Wells B, Peregrine A, Jenkins E, LeRoith T, St John B. Alveolar echinococcosis in a dog in the eastern United States. J Vet Diagn Invest 2020; 32:742-746. [PMID: 32715926 DOI: 10.1177/1040638720943842] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
An 8-y-old Labrador Retriever was presented to a small animal practice in northern Virginia with a history of recent lethargy. Physical examination findings were unremarkable. Ultrasound revealed several large hepatic masses and multiple smaller masses involving the pancreas. Cytologic findings on fine-needle aspirates of the hepatic masses included inflammation and necrosis with eosinophilic, membranous oval structures consistent with cestode infection. Histopathologic findings for biopsies of these masses included extensive necrosis, inflammation, and PAS-positive hyaline-like membranous material interpreted as metacestode cyst wall. A PCR product was generated from aspirate material using primers specific for Echinococcus multilocularis. Subsequent sequence data were 100% homologous to E. multilocularis NADH dehydrogenase subunit I gene sequences. The dog received daily oral albendazole (10 mg/kg) treatment, but its condition deteriorated, and the dog was euthanized. The dog, born in Mississippi, was brought as a puppy to Virginia with no other travel history. To our knowledge, alveolar echinococcosis has not been reported previously in a dog in the United States; E. multilocularis infection was apparently acquired in the mid-Atlantic region of the United States.
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Affiliation(s)
- Anne Zajac
- Virginia Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA (Zajac, LeRoith); Kingdom Animal Hospital, Clear Brook, VA (Fairman); Antech Diagnostics, Fountain Valley, CA (McGee, Wells); University of Guelph, Guelph, ON, Canada (Peregrine); University of Saskatchewan, Saskatoon, Saskatchewan, Canada (Jenkins); Veterinary Imaging Associates, Ashburn, VA (St John)
| | - Donald Fairman
- Virginia Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA (Zajac, LeRoith); Kingdom Animal Hospital, Clear Brook, VA (Fairman); Antech Diagnostics, Fountain Valley, CA (McGee, Wells); University of Guelph, Guelph, ON, Canada (Peregrine); University of Saskatchewan, Saskatoon, Saskatchewan, Canada (Jenkins); Veterinary Imaging Associates, Ashburn, VA (St John)
| | - Evan McGee
- Virginia Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA (Zajac, LeRoith); Kingdom Animal Hospital, Clear Brook, VA (Fairman); Antech Diagnostics, Fountain Valley, CA (McGee, Wells); University of Guelph, Guelph, ON, Canada (Peregrine); University of Saskatchewan, Saskatoon, Saskatchewan, Canada (Jenkins); Veterinary Imaging Associates, Ashburn, VA (St John)
| | - Bridgette Wells
- Virginia Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA (Zajac, LeRoith); Kingdom Animal Hospital, Clear Brook, VA (Fairman); Antech Diagnostics, Fountain Valley, CA (McGee, Wells); University of Guelph, Guelph, ON, Canada (Peregrine); University of Saskatchewan, Saskatoon, Saskatchewan, Canada (Jenkins); Veterinary Imaging Associates, Ashburn, VA (St John)
| | - Andrew Peregrine
- Virginia Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA (Zajac, LeRoith); Kingdom Animal Hospital, Clear Brook, VA (Fairman); Antech Diagnostics, Fountain Valley, CA (McGee, Wells); University of Guelph, Guelph, ON, Canada (Peregrine); University of Saskatchewan, Saskatoon, Saskatchewan, Canada (Jenkins); Veterinary Imaging Associates, Ashburn, VA (St John)
| | - Emily Jenkins
- Virginia Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA (Zajac, LeRoith); Kingdom Animal Hospital, Clear Brook, VA (Fairman); Antech Diagnostics, Fountain Valley, CA (McGee, Wells); University of Guelph, Guelph, ON, Canada (Peregrine); University of Saskatchewan, Saskatoon, Saskatchewan, Canada (Jenkins); Veterinary Imaging Associates, Ashburn, VA (St John)
| | - Tanya LeRoith
- Virginia Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA (Zajac, LeRoith); Kingdom Animal Hospital, Clear Brook, VA (Fairman); Antech Diagnostics, Fountain Valley, CA (McGee, Wells); University of Guelph, Guelph, ON, Canada (Peregrine); University of Saskatchewan, Saskatoon, Saskatchewan, Canada (Jenkins); Veterinary Imaging Associates, Ashburn, VA (St John)
| | - Bethany St John
- Virginia Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA (Zajac, LeRoith); Kingdom Animal Hospital, Clear Brook, VA (Fairman); Antech Diagnostics, Fountain Valley, CA (McGee, Wells); University of Guelph, Guelph, ON, Canada (Peregrine); University of Saskatchewan, Saskatoon, Saskatchewan, Canada (Jenkins); Veterinary Imaging Associates, Ashburn, VA (St John)
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Kotwa JD, Jardine CM, Pearl DL, Berke O, Mercer NJ, Peregrine AS. Evaluation of the SNAP® 4Dx® plus test for the detection of Dirofilaria immitis antigen and characterization of exposure to tick-borne pathogens in wild canids in southern Ontario. Vet Parasitol 2020; 283:109176. [PMID: 32615402 DOI: 10.1016/j.vetpar.2020.109176] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Revised: 06/23/2020] [Accepted: 06/24/2020] [Indexed: 01/16/2023]
Abstract
Population-level surveys for Dirofilaria immitis in wild canids typically rely on identification of the parasite at necropsy. More recently, some studies have employed the use of the SNAP® 4Dx® Plus test. However, since the assay was designed for use with domestic dogs it needs to be validated for use with wild canids for accurate interpretation of results. We therefore evaluated the performance of the SNAP® 4Dx® Plus test for detection of D. immitis in wild canids in southern Ontario. Overall, 199 wild canid carcasses were collected from across the region and assessed for the presence of D. immitis parasites at necropsy; ten were infected. Lung tissue extract (LE) and thoracic fluid filter paper extract (TFE) prepared from each wild canid were tested via the SNAP® 4Dx® Plus test, which simultaneously tests for the presence of D. immitis antigen and antibodies to Borrelia burgdorferi, Anaplasma spp., and Ehrlichia spp. The prevalence adjusted bias adjusted kappa (PABAK) and Gwet's first-order-agreement coefficient (AC1) were used to assess the level of agreement between sample pairs. The PABAK and AC1 between LF and TFE applied to the SNAP® 4Dx® Plus test and the necropsy-confirmed D. immitis status indicated a very high level of agreement for all sample pairs. Compared to necropsy-confirmed D. immitis status, the estimated sensitivity and specificity of the SNAP® 4Dx® Plus test for D. immitis antigen in LE was 80 % (95 % CI 44.4-97.5%) and 98.9 % (95 % CI 96.2-99.9%), respectively. For the TFE, the sensitivity was 70 % (95 % CI 34.8-93.3%) and the specificity was 97.9 % (95 % CI 94.7-99.4%). With respect to the tick-borne pathogen components, 1.5 % (3/199; 95 % CI 0.3-4.5%) of wild canids tested positive for B. burgdorferi antibody; 1.0 % (2/199; 95 % CI 0-3.8%) of LE samples were positive and 0.5 % (1/199; 95 % CI 0-3.1%) of TFE samples were positive. No samples tested positive for antibody to Anaplasma spp. (95 % CI 0-2.3%) or Ehrlichia spp. (95 % CI 0-2.3%). Collectively, the results suggest that the SNAP® 4Dx® Plus test may be a suitable test for use with LE and TFE for the detection of D. immitis antigen in wild canids from southern Ontario.
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Affiliation(s)
- Jonathon D Kotwa
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, Ontario, N1G 2W1, Canada.
| | - Claire M Jardine
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, Ontario, N1G 2W1, Canada; Canadian Wildlife Health Cooperative, Ontario Veterinary College, University of Guelph, Guelph, Ontario, N1G 2W1, Canada
| | - David L Pearl
- Department of Population Medicine, Ontario Veterinary College, University of Guelph, Guelph, Ontario, N1G 2W1, Canada
| | - Olaf Berke
- Department of Population Medicine, Ontario Veterinary College, University of Guelph, Guelph, Ontario, N1G 2W1, Canada
| | - Nicola J Mercer
- Wellington-Dufferin-Guelph Public Health, Guelph, Ontario, N1G 0E1, Canada
| | - Andrew S Peregrine
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, Ontario, N1G 2W1, Canada
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Pielok Ł, Karczewski M, Cierach W, Zmora P, Lenartowicz E, Stefaniak J. Portal hypertension as a result of the incomplete surgically treated advanced alveolar echinococcosis: a case description. BMC Gastroenterol 2020; 20:176. [PMID: 32503447 PMCID: PMC7275433 DOI: 10.1186/s12876-020-01320-0] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Accepted: 05/27/2020] [Indexed: 12/24/2022] Open
Abstract
Background Infection of Echinococcus multilocularis causes in humans the alveolar echinococcosis. Although the infection has world-wide distribution it is rarely detected. Diagnosis of alveococcosis is difficult because of not typical clinical picture and irregular results of radiological examinations suggesting neoplasmatic process which begins in the liver tissue or in the biliary tracts. The parasitic growth is slow, so the illness is quite often established in late invasion period. Treatment of long-lasting and late diagnosed infection is difficult and requires cooperation of parasitologists together with surgeons to avoid life-threatening organ dysfunction. Case presentation We describe a young male patient, diagnosed, according to the radiological, immunological and histological examination results, infection of Echinococcus multilocularis, who was treated with not radical resection of pathologic mass together with persistent albendazole intake. The right hepatectomy was performed. In addition, visible cysts were removed from the left lobe of the liver in nonanatomical resection and suspicious calcified lesions in hepatoduodenal ligament were also removed. After the operation portal hypertension, with splenomegaly and symptoms of the liver cirrhosis occurred (thrombocytopenia, collateral venous circulation, first degree varices oesophagii). The portal hypertension probably could be a result of incomplete surgery due to extended parasitic infection and liver anathomical changes due to performed procedures, because the portal hypertension and it’s further complications had not been observed before the operation. Conclusions Echinococcus multilocularis should be taken under consideration in differential diagnosis of irregular lesions within the liver. Lon-lasting invasion could be responsible for the irreversible secondary liver changes such as cirrhosis and portal hypertension. The surgery treatment (treatment of choice) is difficult and it’s results depends on the invasion period the patient is operated on. After the surgery the patient requires careful follow – up, to detect early complications.
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Affiliation(s)
- Ł Pielok
- Department and Clinic of Tropical and Parasitic Diseases, Poznan University of Medical Sciences, Przybyszewskiego Street 49, 60-355, Poznań, Poland.
| | - M Karczewski
- Department and Clinic of General and Transplant Surgery, Poznan University of Medical Sciences, Przybyszewskiego Street 49, 60-355, Poznań, Poland
| | - W Cierach
- Department and Clinic of General and Transplant Surgery, Poznan University of Medical Sciences, Przybyszewskiego Street 49, 60-355, Poznań, Poland
| | - P Zmora
- Institute of Bioorganic Chemistry Polish Academy of Sciences, Z. Noskowskiego Street 12/14, 61-704, Poznań, Poland
| | - E Lenartowicz
- Institute of Bioorganic Chemistry Polish Academy of Sciences, Z. Noskowskiego Street 12/14, 61-704, Poznań, Poland
| | - J Stefaniak
- Department and Clinic of Tropical and Parasitic Diseases, Poznan University of Medical Sciences, Przybyszewskiego Street 49, 60-355, Poznań, Poland
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Massolo A. Recent alveolar echinococcosis cases in North America warrant further investigation. CMAJ 2020; 191:E1338. [PMID: 31791970 DOI: 10.1503/cmaj.73510] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Affiliation(s)
- Alessandro Massolo
- Associate professor of behavioural ecology, Department of Biology, University of Pisa, Pisa, Italy; adjunct professor of wildlife health ecology, Department of Ecosystems and Public Health, Faculty of Veterinary Medicine, University of Calgary, Calgary, Alta
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Kotwa JD, Pearl DL, Isaksson M, Jardine CM, Berke O, Mercer NJ, Osterman-Lind E, Peregrine AS. Factors associated with Echinococcus multilocularis infection in coyotes in southern Ontario. Zoonoses Public Health 2020; 67:546-553. [PMID: 32369261 DOI: 10.1111/zph.12718] [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: 11/07/2019] [Revised: 03/16/2020] [Accepted: 04/14/2020] [Indexed: 11/26/2022]
Abstract
Echinococcus multilocularis was recently reported in wild canids across southern Ontario, a newly recognized endemic area in Canada. In such areas, a comprehensive understanding of factors associated with infection in definitive hosts (wild canids) is critical for mitigating risk of transmission to humans. However, little is known about the transmission dynamics of the parasite in definitive hosts for this region. A study was therefore carried out to investigate the association of host-level (sex, body condition), environmental (southern Ontario region, land cover), temporal (season, hunting season, calendar year) and extraneous factors (submitter type) with E. multilocularis infection in coyotes in southern Ontario. Between November 2015 and March 2017, 416 coyotes were collected from across the region as part of a study that investigated the prevalence and distribution of the parasite in wild canids; approximately 24% of coyotes were positive for E. multilocularis. Associations between infection and factors of interest were assessed via a mixed-effects logistic regression model with a random intercept for submitter to account for clustering. Coyotes with poor body condition were at greater odds of E. multilocularis infection than those in good condition (odds ratio [OR] 2.14; 95% CI: 1.08-4.26; p = .030). A negative association was observed between infection in coyotes and the proportion of natural land in a coyote's estimated home range (OR: 0.67; 95% CI: 0.52-0.85; p = .001). Coyotes from the western region of southern Ontario had lower odds of infection compared to coyotes from the central region (OR: 0.26; 95% CI: 0.12-0.55; p < .001). These results can be used to help guide future public health prevention strategies for human alveolar echinococcosis.
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Affiliation(s)
- Jonathon D Kotwa
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada
| | - David L Pearl
- Department of Population Medicine, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada
| | | | - Claire M Jardine
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada.,Canadian Wildlife Health Cooperative, Guelph, ON, Canada
| | - Olaf Berke
- Department of Population Medicine, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada
| | - Nicola J Mercer
- Wellington-Dufferin-Guelph Public Health, Guelph, ON, Canada
| | | | - Andrew S Peregrine
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada
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Olivier CJ, Li H, Auer RN, Dixit D. Disseminated alveolar echinococcosis in a 74-year-old woman presenting with focal seizure. CMAJ 2020; 191:E940-E943. [PMID: 31451525 DOI: 10.1503/cmaj.181258] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Affiliation(s)
- Christopher J Olivier
- Department of Medicine (Olivier, Dixit), and Division of Neurosurgery (Li; during case management), Department of Surgery and Department of Pathology (Auer), College of Medicine; Division of Infectious Diseases (Dixit), Department of Medicine, University of Saskatchewan, Saskatoon, Sask.; Division of Anatomical Pathology (Li), Department of Pathology and Laboratory Medicine, Schulich School of Medicine & Dentistry, Western University, London, Ont
| | - Hao Li
- Department of Medicine (Olivier, Dixit), and Division of Neurosurgery (Li; during case management), Department of Surgery and Department of Pathology (Auer), College of Medicine; Division of Infectious Diseases (Dixit), Department of Medicine, University of Saskatchewan, Saskatoon, Sask.; Division of Anatomical Pathology (Li), Department of Pathology and Laboratory Medicine, Schulich School of Medicine & Dentistry, Western University, London, Ont
| | - Roland N Auer
- Department of Medicine (Olivier, Dixit), and Division of Neurosurgery (Li; during case management), Department of Surgery and Department of Pathology (Auer), College of Medicine; Division of Infectious Diseases (Dixit), Department of Medicine, University of Saskatchewan, Saskatoon, Sask.; Division of Anatomical Pathology (Li), Department of Pathology and Laboratory Medicine, Schulich School of Medicine & Dentistry, Western University, London, Ont
| | - Devika Dixit
- Department of Medicine (Olivier, Dixit), and Division of Neurosurgery (Li; during case management), Department of Surgery and Department of Pathology (Auer), College of Medicine; Division of Infectious Diseases (Dixit), Department of Medicine, University of Saskatchewan, Saskatoon, Sask.; Division of Anatomical Pathology (Li), Department of Pathology and Laboratory Medicine, Schulich School of Medicine & Dentistry, Western University, London, Ont.
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Persad RA. Bayesian Space-Time Analysis of Brain Cancer Incidence in Southern Ontario, Canada: 2010-2013. Med Sci (Basel) 2019; 7:medsci7120110. [PMID: 31847406 PMCID: PMC6950658 DOI: 10.3390/medsci7120110] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Revised: 12/09/2019] [Accepted: 12/11/2019] [Indexed: 11/21/2022] Open
Abstract
Canada has one of the highest incidence rates of brain cancer in the world. This study investigates the space–time variation of brain cancer risk across Southern Ontario, Canada. A Bayesian spatio-temporal regression model is used to estimate the relative risk of brain cancer in the 12 spatial health units of Southern Ontario over a four-year period (2010–2013). This work also explores the association between brain cancer and two potential risk factors: traumatic head injury (THI) and excess body fat (EBF). Across all areal units from 2010–2013, results show that the relative risk of brain cancer ranged from 0.83 (95% credible interval (CI) 0.74–0.91) to 1.26 (95% CI 1.13–1.41). Over the years, the eastern and western health units had persistently higher risk levels compared to those in the central areas. Results suggest that areas with elevated THI rates and EBF levels were also potentially associated with higher brain cancer relative risk. Findings revealed that the mean temporal trend for cancer risk progression in the region smoothly decreased over time. Overall, 50% of the health units displayed area-specific trends which were higher than the region’s average, thus indicating a slower decrease in cancer rates for these areas in comparison to the mean trend.
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Kotwa JD, Jardine CM, Berke O, Pearl DL, Mercer NJ, Peregrine AS. Prevalence and distribution of Dirofilaria immitis infection in wild canids in southern Ontario. VETERINARY PARASITOLOGY- REGIONAL STUDIES AND REPORTS 2019; 18:100349. [PMID: 31796196 DOI: 10.1016/j.vprsr.2019.100349] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 10/29/2019] [Accepted: 11/05/2019] [Indexed: 11/25/2022]
Abstract
Wild canids represent a potential reservoir host for Dirofilaria immitis infection in dogs in Ontario. Since wild canids are not protected by chemoprophylaxis, understanding the epidemiology of D. immmitis in these populations may help elucidate the background risk of infection for dogs. The aim of this study was to determine the prevalence and distribution of D. immitis infection in wild canids across southern Ontario. From February 2016 to March 2017, 290 wild canid carcasses (273 coyotes and 17 foxes) were collected from across the region and assessed for the presence of D. immitis at the time of necropsy. Overall, D. immitis infection was identified in 4.8% (95% CI 2.8-8.0%) of these wild canid carcasses. Among coyotes, 5.1% (95% CI 3.0-8.5%) were positive; no evidence of D. immitis was found in the 17 foxes. Dirofilaria immitis infections in wild canids were detected in two regions of southern Ontario: 12 of the 14 D. immitis infections were detected in the south-western region and two were detected in the eastern region. Our findings provide preliminary insights into the prevalence and geographical distribution of D. immitis in coyotes and foxes in southern Ontario.
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Affiliation(s)
- Jonathon D Kotwa
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, Ontario N1G 2W1, Canada.
| | - Claire M Jardine
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, Ontario N1G 2W1, Canada; Canadian Wildlife Health Cooperative, Ontario Veterinary College, University of Guelph, Guelph, Ontario N1G 2W1, Canada
| | - Olaf Berke
- Department of Population Medicine, Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada
| | - David L Pearl
- Department of Population Medicine, Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada
| | - Nicola J Mercer
- Wellington-Dufferin-Guelph Public Health, Guelph, Ontario N1G 0E1, Canada
| | - Andrew S Peregrine
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, Ontario N1G 2W1, Canada
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Baumann S, Shi R, Liu W, Bao H, Schmidberger J, Kratzer W, Li W. Worldwide literature on epidemiology of human alveolar echinococcosis: a systematic review of research published in the twenty-first century. Infection 2019; 47:703-727. [PMID: 31147846 PMCID: PMC8505309 DOI: 10.1007/s15010-019-01325-2] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Accepted: 05/20/2019] [Indexed: 12/13/2022]
Abstract
PURPOSE Human alveolar echinococcosis (AE) is a potentially lethal zoonosis caused by the cestode Echinococcus multilocularis. The aim of this systematic review is to establish a comprehensive global AE literature overview taking into account the epidemiologically relevant AE research of the twenty-first century. METHODS We systematically searched the global literature published from 2001 through 2018 via MEDLINE, EMBASE, the Russian databases eLIBRARY.RU, CyberLeninka, the Chinese databases CNKI, VIP, Journals. RESEARCH ac.ir (Farsi language-based), Jordan E-Library (Arab language-based) and supplementary Google Scholar, in accordance with the PRISMA guidelines. QGIS software was used for the mapping of the affected countries. RESULTS We have listed 154 relevant publications in the final literature synopsis in consideration of our quality assessment. Including non-autochthonous cases, human AE was reported in 36 countries within the northern hemisphere from 2001 to 2018. The first publication of AE in Tajikistan, Pakistan, South Korea, Belgium, the Netherlands, Slovakia, Hungary, Lithuania, Latvia, Slovenia and Morocco occurred in this century; further first cases in Taiwan, Thailand, and Denmark were considered to be non-autochthonous by the authors. The highest total case numbers (n ≥ 100 in a single article) were reported in France, Germany, Switzerland, Poland, and Lithuania, including China and Kyrgyzstan with by far the highest prevalence figures. CONCLUSIONS Our paper emphasises the increasing spread of reported cases and the rise in its numbers in the literature of the twenty-first century, especially in western, northern and eastern Europe, as well as in central Asia. Epidemiological studies on human infections are lacking in many parts of the world.
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Affiliation(s)
- Sven Baumann
- Department of Internal Medicine I, Ulm University Hospital, Albert-Einstein-Allee 23, 89081, Ulm, Germany
| | - Rong Shi
- Department of Diagnostic and Interventional Radiology, Ulm University Hospital, Albert-Einstein-Allee 23, 89081, Ulm, Germany
| | - Wenya Liu
- Xinjiang Medical University, First Affiliated Hospital, WHO Collaborating Centre on Prevention and Care Management of Echinococcosis, Urumqi, 830000, Xinjiang Uyghur Autonomous Region, People's Republic of China
| | - Haihua Bao
- Qinghai University Affiliated Hospital, Qinghai University, Xining, 810001, Qinghai, People's Republic of China
| | - Julian Schmidberger
- Department of Internal Medicine I, Ulm University Hospital, Albert-Einstein-Allee 23, 89081, Ulm, Germany
| | - Wolfgang Kratzer
- Department of Internal Medicine I, Ulm University Hospital, Albert-Einstein-Allee 23, 89081, Ulm, Germany.
| | - Weixia Li
- Qinghai University Affiliated Hospital, Qinghai University, Xining, 810001, Qinghai, People's Republic of China
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Frey CF, Jenkins E, Lundström-Stadelmann B. Editorial overview: From farms and forests to forks? A review of diagnosis and management of globally important zoonotic Echinococcus spp. cestodes. Food Waterborne Parasitol 2019; 16:e00061. [PMID: 32095631 PMCID: PMC7034014 DOI: 10.1016/j.fawpar.2019.e00061] [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: 03/30/2019] [Revised: 05/23/2019] [Accepted: 05/27/2019] [Indexed: 11/20/2022] Open
Abstract
This FAWPAR Special Issue is dedicated to zoonotic Echinococcus species. It is a compilation of invited papers that spans important aspects from molecular markers of emergence, diagnostics in both definitive and intermediate hosts, treatment of human alveolar echinococcosis, to control strategies in definitive hosts.
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Affiliation(s)
- Caroline F. Frey
- Centre for Food-borne and Animal Parasitology, Canadian Food Inspection Agency, Saskatoon, Canada
| | - Emily Jenkins
- Department of Veterinary Microbiology, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, Canada
| | - Britta Lundström-Stadelmann
- Institute of Parasitology, Department of Infectious Diseases and Pathobiology, Vetsuisse Faculty, University of Bern, Bern, Switzerland
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