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Segura JA, Dibernardo A, Manguiat K, Waitt B, Rueda ZV, Keynan Y, Wood H, Gutiérrez LA. Molecular surveillance of microbial agents from cattle-attached and questing ticks from livestock agroecosystems of Antioquia, Colombia. Comp Immunol Microbiol Infect Dis 2024; 105:102113. [PMID: 38176202 DOI: 10.1016/j.cimid.2023.102113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Revised: 12/16/2023] [Accepted: 12/16/2023] [Indexed: 01/06/2024]
Abstract
Ticks are obligate ectoparasites and vectors of pathogens affecting health, agriculture, and animal welfare. This study collected ticks from the cattle and questing ticks of 24 Magdalena Medio Antioquia region cattle farms. Genomic DNA was extracted from the specimens (individual or pools) of the 2088 adult ticks collected from cattle and 4667 immature questing ticks collected from pastures. The molecular detection of Babesia, Anaplasma, Coxiella and Rickettsia genera was performed by polymerase chain reaction amplification and subsequent DNA sequencing. In a total of 6755 Rhipicephalus microplus DNA samples, Anaplasma marginale was the most detected with a frequency of 2% (Confidence Interval- CI 1.68-2.36), followed by Babesia bigemina with 0.28% (CI 0.16-0.44), Coxiella spp. with 0.15% (CI 0.07-0.27), and Rickettsia spp. with 0.13% (CI 0.06-0.25). Molecular analysis of the DNA sequences obtained from the tick samples revealed the presence of Coxiella-like endosymbiont and R. felis. These results demonstrated the diversity of microorganisms present in R. microplus ticks predominantly associated with cattle and questing ticks from livestock agroecosystems, suggesting their role as reservoirs and potential biological vectors of these microorganisms on the studied sites. Also, it emphasizes the need to combine acarological surveillance with clinical diagnoses and control strategies on regional and national levels.
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Affiliation(s)
- Juan A Segura
- Grupo Biología de Sistemas, Escuela de Ciencias de la Salud, Facultad de Medicina, Universidad Pontificia Bolivariana, Circular 1a No 70-01, Bloque 11C - Oficina 417, Medellín, Colombia
| | - Antonia Dibernardo
- One Health, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, Canada
| | - Kathy Manguiat
- One Health, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, Canada
| | - Brooks Waitt
- One Health, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, Canada
| | - Zulma V Rueda
- Department of Medical Microbiology and Infectious Diseases, University of Manitoba, Winnipeg, Canada; Grupo de investigación en Salud Pública, Escuela de Ciencias de la Salud, Facultad de Medicina, Universidad Pontificia Bolivariana, Medellín, Colombia
| | - Yoav Keynan
- Department of Medical Microbiology and Infectious Diseases, University of Manitoba, Winnipeg, Canada; Department of Internal Medicine, University of Manitoba, Winnipeg, Canada
| | - Heidi Wood
- One Health, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, Canada
| | - Lina A Gutiérrez
- Grupo Biología de Sistemas, Escuela de Ciencias de la Salud, Facultad de Medicina, Universidad Pontificia Bolivariana, Circular 1a No 70-01, Bloque 11C - Oficina 417, Medellín, Colombia.
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Lamoureux L, Sajesh B, Slota JA, Medina SJ, Mayor M, Frost KL, Warner B, Manguiat K, Wood H, Kobasa D, Booth SA. Non-Productive Infection of Glial Cells with SARS-CoV-2 in Hamster Organotypic Cerebellar Slice Cultures. Viruses 2022; 14:1218. [PMID: 35746689 PMCID: PMC9227386 DOI: 10.3390/v14061218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Revised: 05/31/2022] [Accepted: 06/01/2022] [Indexed: 11/30/2022] Open
Abstract
The numerous neurological syndromes associated with COVID-19 implicate an effect of viral pathogenesis on neuronal function, yet reports of direct SARS-CoV-2 infection in the brain are conflicting. We used a well-established organotypic brain slice culture to determine the permissivity of hamster brain tissues to SARS-CoV-2 infection. We found levels of live virus waned after inoculation and observed no evidence of cell-to-cell spread, indicating that SARS-CoV-2 infection was non-productive. Nonetheless, we identified a small number of infected cells with glial phenotypes; however, no evidence of viral infection or replication was observed in neurons. Our data corroborate several clinical studies that have assessed patients with COVID-19 and their association with neurological involvement.
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Affiliation(s)
- Lise Lamoureux
- One Health Division, Public Health Agency of Canada, National Microbiology Laboratory, 1015 Arlington St., Winnipeg, MB R3E 3R2, Canada; (L.L.); (B.S.); (J.A.S.); (S.J.M.); (M.M.); (K.L.F.); (K.M.); (H.W.)
| | - Babu Sajesh
- One Health Division, Public Health Agency of Canada, National Microbiology Laboratory, 1015 Arlington St., Winnipeg, MB R3E 3R2, Canada; (L.L.); (B.S.); (J.A.S.); (S.J.M.); (M.M.); (K.L.F.); (K.M.); (H.W.)
| | - Jessy A. Slota
- One Health Division, Public Health Agency of Canada, National Microbiology Laboratory, 1015 Arlington St., Winnipeg, MB R3E 3R2, Canada; (L.L.); (B.S.); (J.A.S.); (S.J.M.); (M.M.); (K.L.F.); (K.M.); (H.W.)
- Department of Medical Microbiology and Infectious Diseases, Faculty of Health Sciences, University of Manitoba, 730 William Ave., Winnipeg, MB R3E 0W3, Canada;
| | - Sarah J. Medina
- One Health Division, Public Health Agency of Canada, National Microbiology Laboratory, 1015 Arlington St., Winnipeg, MB R3E 3R2, Canada; (L.L.); (B.S.); (J.A.S.); (S.J.M.); (M.M.); (K.L.F.); (K.M.); (H.W.)
| | - Matthew Mayor
- One Health Division, Public Health Agency of Canada, National Microbiology Laboratory, 1015 Arlington St., Winnipeg, MB R3E 3R2, Canada; (L.L.); (B.S.); (J.A.S.); (S.J.M.); (M.M.); (K.L.F.); (K.M.); (H.W.)
| | - Kathy L. Frost
- One Health Division, Public Health Agency of Canada, National Microbiology Laboratory, 1015 Arlington St., Winnipeg, MB R3E 3R2, Canada; (L.L.); (B.S.); (J.A.S.); (S.J.M.); (M.M.); (K.L.F.); (K.M.); (H.W.)
| | - Bryce Warner
- Special Pathogens, Public Health Agency of Canada, National Microbiology Laboratory, 1015 Arlington St., Winnipeg, MB R3E 3R2, Canada;
| | - Kathy Manguiat
- One Health Division, Public Health Agency of Canada, National Microbiology Laboratory, 1015 Arlington St., Winnipeg, MB R3E 3R2, Canada; (L.L.); (B.S.); (J.A.S.); (S.J.M.); (M.M.); (K.L.F.); (K.M.); (H.W.)
| | - Heidi Wood
- One Health Division, Public Health Agency of Canada, National Microbiology Laboratory, 1015 Arlington St., Winnipeg, MB R3E 3R2, Canada; (L.L.); (B.S.); (J.A.S.); (S.J.M.); (M.M.); (K.L.F.); (K.M.); (H.W.)
| | - Darwyn Kobasa
- Department of Medical Microbiology and Infectious Diseases, Faculty of Health Sciences, University of Manitoba, 730 William Ave., Winnipeg, MB R3E 0W3, Canada;
- Special Pathogens, Public Health Agency of Canada, National Microbiology Laboratory, 1015 Arlington St., Winnipeg, MB R3E 3R2, Canada;
| | - Stephanie A. Booth
- One Health Division, Public Health Agency of Canada, National Microbiology Laboratory, 1015 Arlington St., Winnipeg, MB R3E 3R2, Canada; (L.L.); (B.S.); (J.A.S.); (S.J.M.); (M.M.); (K.L.F.); (K.M.); (H.W.)
- Department of Medical Microbiology and Infectious Diseases, Faculty of Health Sciences, University of Manitoba, 730 William Ave., Winnipeg, MB R3E 0W3, Canada;
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Hall VG, Ferreira VH, Wood H, Ierullo M, Majchrzak-Kita B, Manguiat K, Robinson A, Kulasingam V, Humar A, Kumar D. Delayed-interval BNT162b2 mRNA COVID-19 vaccination enhances humoral immunity and induces robust T cell responses. Nat Immunol 2022; 23:380-385. [PMID: 35115679 DOI: 10.1038/s41590-021-01126-6] [Citation(s) in RCA: 52] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Accepted: 12/20/2021] [Indexed: 11/09/2022]
Abstract
Delayed dosing intervals are a strategy to immunize a greater proportion of the population. In an observational study, we compared humoral and cellular responses in health care workers receiving two doses of BNT162b2 (Pfizer-BioNTech) vaccine at standard (3- to 6-week) and delayed (8- to 16-week) intervals. In the delayed-interval group, anti-receptor-binding domain antibody titers were significantly enhanced compared to the standard-interval group. The 50% plaque reduction neutralization test (PRNT50) and PRNT90 titers against wild-type (ancestral) severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and Alpha, Beta and Delta variants were higher in the delayed-interval group. Spike-specific polyfunctional CD4+ and CD8+ T cells expressing interferon-γ and interleukin-2 were comparable between the two groups. Here, we show that the strategy of delaying second doses of mRNA vaccination may lead to enhanced humoral immune responses, including improved virus neutralization against wild-type and variant SARS-CoV-2 viruses. This finding has potentially important implications as vaccine implementation continues across a greater proportion of the global population.
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Affiliation(s)
- Victoria G Hall
- Transplant Infectious Diseases and Ajmera Transplant Centre, University Health Network, Toronto, Canada.
| | - Victor H Ferreira
- Transplant Infectious Diseases and Ajmera Transplant Centre, University Health Network, Toronto, Canada
| | - Heidi Wood
- National Microbiology Laboratory & Public Health Agency of Canada, Winnipeg, Canada
| | - Matthew Ierullo
- Transplant Infectious Diseases and Ajmera Transplant Centre, University Health Network, Toronto, Canada
| | - Beata Majchrzak-Kita
- Transplant Infectious Diseases and Ajmera Transplant Centre, University Health Network, Toronto, Canada
| | - Kathy Manguiat
- National Microbiology Laboratory & Public Health Agency of Canada, Winnipeg, Canada
| | - Alyssia Robinson
- National Microbiology Laboratory & Public Health Agency of Canada, Winnipeg, Canada
| | | | - Atul Humar
- Transplant Infectious Diseases and Ajmera Transplant Centre, University Health Network, Toronto, Canada
| | - Deepali Kumar
- Transplant Infectious Diseases and Ajmera Transplant Centre, University Health Network, Toronto, Canada.
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Griffin BD, Warner BM, Chan M, Valcourt E, Tailor N, Banadyga L, Leung A, He S, Boese AS, Audet J, Cao W, Moffat E, Garnett L, Tierney K, Tran KN, Albietz A, Manguiat K, Soule G, Bello A, Vendramelli R, Lin J, Deschambault Y, Zhu W, Wood H, Mubareka S, Safronetz D, Strong JE, Embury-Hyatt C, Kobasa D. Host parameters and mode of infection influence outcome in SARS-CoV-2-infected hamsters. iScience 2021; 24:103530. [PMID: 34870132 PMCID: PMC8627009 DOI: 10.1016/j.isci.2021.103530] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 11/15/2021] [Accepted: 11/23/2021] [Indexed: 01/08/2023] Open
Abstract
The golden hamster model of SARS-CoV-2 infection recapitulates key characteristics of COVID-19. In this work we examined the influence of the route of exposure, sex, and age on SARS-CoV-2 pathogenesis in hamsters. We report that delivery of SARS-CoV-2 by a low- versus high-volume intranasal or intragastric route results in comparable viral titers in the lung and viral shedding. However, low-volume intranasal exposure results in milder weight loss, whereas intragastric exposure leads to a diminished capacity to regain body weight. Male hamsters, and particularly older male hamsters, display an impaired capacity to recover from illness and delayed viral clearance. These factors were found to influence the nature of the host inflammatory cytokine response but had a minimal effect on the quality and durability of the humoral immune response and susceptibility to re-infection. These data further elucidate key factors that impact pre-clinical challenge studies carried out in the hamster model of COVID-19.
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Affiliation(s)
- Bryan D. Griffin
- Zoonotic Diseases and Special Pathogens Division, National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg R3E 3R2, MB, Canada
| | - Bryce M. Warner
- Zoonotic Diseases and Special Pathogens Division, National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg R3E 3R2, MB, Canada
- Department of Medical Microbiology and Infectious Diseases, College of Medicine, Faculty of Health Sciences, University of Manitoba, 745 Bannatyne Avenue, Winnipeg R3E 0J9, MB, Canada
| | - Mable Chan
- Zoonotic Diseases and Special Pathogens Division, National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg R3E 3R2, MB, Canada
| | - Emelissa Valcourt
- Zoonotic Diseases and Special Pathogens Division, National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg R3E 3R2, MB, Canada
| | - Nikesh Tailor
- Zoonotic Diseases and Special Pathogens Division, National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg R3E 3R2, MB, Canada
| | - Logan Banadyga
- Zoonotic Diseases and Special Pathogens Division, National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg R3E 3R2, MB, Canada
| | - Anders Leung
- Zoonotic Diseases and Special Pathogens Division, National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg R3E 3R2, MB, Canada
| | - Shihua He
- Zoonotic Diseases and Special Pathogens Division, National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg R3E 3R2, MB, Canada
| | - Amrit S. Boese
- Zoonotic Diseases and Special Pathogens Division, National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg R3E 3R2, MB, Canada
| | - Jonathan Audet
- Zoonotic Diseases and Special Pathogens Division, National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg R3E 3R2, MB, Canada
| | - Wenguang Cao
- Zoonotic Diseases and Special Pathogens Division, National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg R3E 3R2, MB, Canada
| | - Estella Moffat
- National Centre for Foreign Animal Disease, Canadian Food Inspection Agency, 1015 Arlington Street, Winnipeg R3E 3M4, MB, Canada
| | - Lauren Garnett
- Zoonotic Diseases and Special Pathogens Division, National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg R3E 3R2, MB, Canada
- Department of Medical Microbiology and Infectious Diseases, College of Medicine, Faculty of Health Sciences, University of Manitoba, 745 Bannatyne Avenue, Winnipeg R3E 0J9, MB, Canada
| | - Kevin Tierney
- Zoonotic Diseases and Special Pathogens Division, National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg R3E 3R2, MB, Canada
| | - Kaylie N. Tran
- Zoonotic Diseases and Special Pathogens Division, National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg R3E 3R2, MB, Canada
| | - Alixandra Albietz
- Zoonotic Diseases and Special Pathogens Division, National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg R3E 3R2, MB, Canada
| | - Kathy Manguiat
- Zoonotic Diseases and Special Pathogens Division, National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg R3E 3R2, MB, Canada
| | - Geoff Soule
- Zoonotic Diseases and Special Pathogens Division, National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg R3E 3R2, MB, Canada
| | - Alexander Bello
- Zoonotic Diseases and Special Pathogens Division, National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg R3E 3R2, MB, Canada
| | - Robert Vendramelli
- Zoonotic Diseases and Special Pathogens Division, National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg R3E 3R2, MB, Canada
| | - Jessica Lin
- Zoonotic Diseases and Special Pathogens Division, National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg R3E 3R2, MB, Canada
| | - Yvon Deschambault
- Zoonotic Diseases and Special Pathogens Division, National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg R3E 3R2, MB, Canada
| | - Wenjun Zhu
- Zoonotic Diseases and Special Pathogens Division, National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg R3E 3R2, MB, Canada
| | - Heidi Wood
- Zoonotic Diseases and Special Pathogens Division, National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg R3E 3R2, MB, Canada
| | - Samira Mubareka
- Department of Laboratory Medicine and Pathobiology, Faculty of Medicine, University of Toronto, Toronto, ON M5S 1A1, Canada
- Biological Sciences, Sunnybrook Research Institute, Toronto M4N 3M5, ON, Canada
| | - David Safronetz
- Zoonotic Diseases and Special Pathogens Division, National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg R3E 3R2, MB, Canada
- Department of Medical Microbiology and Infectious Diseases, College of Medicine, Faculty of Health Sciences, University of Manitoba, 745 Bannatyne Avenue, Winnipeg R3E 0J9, MB, Canada
| | - James E. Strong
- Zoonotic Diseases and Special Pathogens Division, National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg R3E 3R2, MB, Canada
- Department of Medical Microbiology and Infectious Diseases, College of Medicine, Faculty of Health Sciences, University of Manitoba, 745 Bannatyne Avenue, Winnipeg R3E 0J9, MB, Canada
- Pediatrics & Child Health, College of Medicine, Faculty of Health Sciences, University of Manitoba, 745 Bannatyne Avenue, Winnipeg R3E 0J9, MB, Canada
| | - Carissa Embury-Hyatt
- National Centre for Foreign Animal Disease, Canadian Food Inspection Agency, 1015 Arlington Street, Winnipeg R3E 3M4, MB, Canada
| | - Darwyn Kobasa
- Zoonotic Diseases and Special Pathogens Division, National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg R3E 3R2, MB, Canada
- Department of Medical Microbiology and Infectious Diseases, College of Medicine, Faculty of Health Sciences, University of Manitoba, 745 Bannatyne Avenue, Winnipeg R3E 0J9, MB, Canada
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Qiu H, Yuan XY, Cabral T, Manguiat K, Robinson A, Wood H, Grant C, McQueen P, Westmacott G, Beniac DR, Lin L, Carpenter M, Kobasa D, Gräfenhan T. Development and characterization of SARS-CoV-2 variant-neutralizing monoclonal antibodies. Antiviral Res 2021; 196:105206. [PMID: 34762975 PMCID: PMC8572761 DOI: 10.1016/j.antiviral.2021.105206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 11/02/2021] [Accepted: 11/04/2021] [Indexed: 11/27/2022]
Abstract
Vaccination and administration of monoclonal antibody cocktails are effective tools to control the progression of infectious diseases and to terminate pandemics such as COVID-19. However, the emergence of SARS-CoV-2 mutants with enhanced transmissibility and altered antigenicity requires broad-spectrum therapies. Here we developed a panel of SARS-CoV-2 specific mouse monoclonal antibodies (mAbs), and characterized them based on ELISA, Western immunoblot, isotyping, and virus neutralization. Six neutralizing mAbs that exhibited high-affinity binding to SARS-CoV-2 spike protein were identified, and their amino acid sequences were determined by mass spectrometry. Functional assays confirmed that three mAbs, F461G11, F461G15, and F461G16 neutralized four variants of concern (VOC): B.1.1.7 (alpha), B.1.351 (beta), P.1 (gamma) and B.1.617.2 (delta) These mAbs are promising candidates for COVID-19 therapy, and understanding their interactions with virus spike protein should support further vaccine and antibody development.
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Affiliation(s)
- Hongyu Qiu
- National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg, MB, R3E 3R2, Canada.
| | - Xin-Yong Yuan
- National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg, MB, R3E 3R2, Canada
| | - Teresa Cabral
- National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg, MB, R3E 3R2, Canada
| | - Kathy Manguiat
- National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg, MB, R3E 3R2, Canada
| | - Alyssia Robinson
- National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg, MB, R3E 3R2, Canada
| | - Heidi Wood
- National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg, MB, R3E 3R2, Canada
| | - Chris Grant
- National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg, MB, R3E 3R2, Canada
| | - Peter McQueen
- National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg, MB, R3E 3R2, Canada
| | - Garrett Westmacott
- National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg, MB, R3E 3R2, Canada
| | - Daniel R Beniac
- National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg, MB, R3E 3R2, Canada
| | - Lisa Lin
- National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg, MB, R3E 3R2, Canada
| | - Michael Carpenter
- National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg, MB, R3E 3R2, Canada
| | - Darwyn Kobasa
- National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg, MB, R3E 3R2, Canada
| | - Tom Gräfenhan
- National Microbiology Laboratory, Public Health Agency of Canada, 1015 Arlington Street, Winnipeg, MB, R3E 3R2, Canada.
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Duplaix L, Turgeon P, Lévesque B, Rocheleau JP, Leboeuf A, Picard I, Manguiat K, Wood H, Arsenault J. Seroprevalence and risk factors of antibodies against Coxiella burnetii among dog owners in southwestern Québec, Canada. Epidemiol Infect 2021; 149:1-45. [PMID: 34176524 PMCID: PMC8314959 DOI: 10.1017/s0950268821001412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Revised: 05/13/2021] [Accepted: 06/22/2021] [Indexed: 11/18/2022] Open
Abstract
Coxiella burnetii is a zoonotic agent responsible for human Q fever, a potentially severe disease that can lead to persistent infection. This cross-sectional study aimed to estimate the seroprevalence to C. burnetii antibodies and its association with potential risk factors in the human population of five regions of Québec, Canada. A serum bank comprising sera from 474 dog owners was screened by an enzyme-linked immunosorbent assay followed by confirmation of positive or equivocal sera by an indirect immunofluorescence assay. Observed seroprevalences of 1.2% (95% confidence interval (CI): 0.0–6.6), 2.6% (95% CI: 0.5–7.4) and 5.9% (95% CI: 3.4–9.6) were estimated in the regions of Montréal, Lanaudière and Montérégie, respectively, which all included at least 83 samples. Having lived or worked on a small ruminant farm (prevalence odds ratio (POR) = 5.4; 95% CI: 1.6–17.7) and being a veterinarian or veterinary student (POR = 6.1; 95% CI: 1.6–24.0) were significantly associated with C. burnetii seropositivity. Antibodies against C. burnetii were detected in the human population of Québec. Although seropositivity to this agent was associated with occupational contact with domestic animals, antibodies were also detected in people with no reported professional exposure. No associations with ruminant farm proximity were identified.
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Affiliation(s)
- L. Duplaix
- Department of Pathology and Microbiology, Faculty of Veterinary Medicine, Université de Montréal, Saint-Hyacinthe, Québec, Canada
- Groupe de recherche en épidémiologie des zoonoses et santé publique (GREZOSP), Faculty of Veterinary Medicine, Université de Montréal, Saint-Hyacinthe, Québec, Canada
| | - P. Turgeon
- Department of Pathology and Microbiology, Faculty of Veterinary Medicine, Université de Montréal, Saint-Hyacinthe, Québec, Canada
- Groupe de recherche en épidémiologie des zoonoses et santé publique (GREZOSP), Faculty of Veterinary Medicine, Université de Montréal, Saint-Hyacinthe, Québec, Canada
- National Microbiology Laboratory, Public Health Agency of Canada (PHAC), Saint-Hyacinthe, Québec, Canada
| | - B. Lévesque
- Département de médecine sociale et préventive, Faculté de médecine, Université Laval, Québec, Canada
| | - J.-P. Rocheleau
- Groupe de recherche en épidémiologie des zoonoses et santé publique (GREZOSP), Faculty of Veterinary Medicine, Université de Montréal, Saint-Hyacinthe, Québec, Canada
- Cégep de Saint-Hyacinthe, Saint-Hyacinthe, Québec, Canada
| | - A. Leboeuf
- Ministère de l'Agriculture, des Pêcheries et de l'Alimentation du Québec (MAPAQ), ville de Québec, Québec, Canada
| | - I. Picard
- Ministère de l'Agriculture, des Pêcheries et de l'Alimentation du Québec (MAPAQ), ville de Québec, Québec, Canada
| | - K. Manguiat
- National Microbiology Laboratory, Public Health Agency of Canada (PHAC), Winnipeg, Manitoba, Canada
| | - H. Wood
- National Microbiology Laboratory, Public Health Agency of Canada (PHAC), Winnipeg, Manitoba, Canada
| | - J. Arsenault
- Department of Pathology and Microbiology, Faculty of Veterinary Medicine, Université de Montréal, Saint-Hyacinthe, Québec, Canada
- Groupe de recherche en épidémiologie des zoonoses et santé publique (GREZOSP), Faculty of Veterinary Medicine, Université de Montréal, Saint-Hyacinthe, Québec, Canada
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7
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Papenburg J, Cheng MP, Corsini R, Caya C, Mendoza E, Manguiat K, Lindsay LR, Wood H, Drebot MA, Dibernardo A, Zaharatos G, Bazin R, Gasser R, Benlarbi M, Gendron-Lepage G, Beaudoin-Bussières G, Prévost J, Finzi A, Ndao M, Yansouni CP. Evaluation of a Commercial Culture-Free Neutralization Antibody Detection Kit for Severe Acute Respiratory Syndrome-Related Coronavirus-2 and Comparison With an Antireceptor-Binding Domain Enzyme-Linked Immunosorbent Assay. Open Forum Infect Dis 2021; 8:ofab220. [PMID: 34136587 PMCID: PMC8135688 DOI: 10.1093/ofid/ofab220] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Accepted: 04/26/2021] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Severe acute respiratory syndrome-related coronavirus 2 (SARS-CoV-2) surrogate neutralization assays that obviate the need for viral culture offer substantial advantages regarding throughput and cost. The cPass SARS-CoV-2 Neutralization Antibody Detection Kit (GenScript) is the first such commercially available assay that detects antibodies that block receptor-binding domain (RBD)/angiotensin-converting enzyme (ACE)-2 interaction. We aimed to evaluate cPass to inform its use and assess its added value compared with anti-RBD enzyme-linked immunosorbent assays (ELISAs). METHODS Serum reference panels comprising 205 specimens were used to compare cPass to plaque-reduction neutralization test (PRNT) and a pseudotyped lentiviral neutralization (PLV) assay for detection of neutralizing antibodies. We assessed the correlation of cPass with an ELISA detecting anti-RBD immunoglobulin (Ig)G, IgM, and IgA antibodies at a single timepoint and across intervals from onset of symptoms of SARS-CoV-2 infection. RESULTS Compared with PRNT-50, cPass sensitivity ranged from 77% to 100% and specificity was 95% to 100%. Sensitivity was also high compared with the pseudotyped lentiviral neutralization assay (93%; 95% confidence interval [CI], 85-97), but specificity was lower (58%; 95% CI, 48-67). Highest agreement between cPass and ELISA was for anti-RBD IgG (r = 0.823). Against the pseudotyped lentiviral neutralization assay, anti-RBD IgG sensitivity (99%; 95% CI, 94-100) was very similar to that of cPass, but overall specificity was lower (37%; 95% CI, 28-47). Against PRNT-50, results of cPass and anti-RBD IgG were nearly identical. CONCLUSIONS The added value of cPass compared with an IgG anti-RBD ELISA was modest.
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Affiliation(s)
- Jesse Papenburg
- Division of Pediatric Infectious Diseases, Department of Pediatrics, Montreal Children’s Hospital, Montreal, Quebec, Canada
- Division of Microbiology, Department of Clinical Laboratory Medicine, Optilab Montreal - McGill University Health Centre, Montreal, Quebec, Canada
- McGill Interdisciplinary Initiative in Infection and Immunity, Montreal, Quebec, Canada
- Department of Epidemiology, Biostatistics, and Occupational Health, School of Population and Global Health, McGill University, Montreal, Quebec, Canada
| | - Matthew P Cheng
- Division of Microbiology, Department of Clinical Laboratory Medicine, Optilab Montreal - McGill University Health Centre, Montreal, Quebec, Canada
- McGill Interdisciplinary Initiative in Infection and Immunity, Montreal, Quebec, Canada
- Division of Infectious Diseases, Department of Medicine, McGill University Health Centre, Montreal, Quebec, Canada
| | - Rachel Corsini
- McGill Interdisciplinary Initiative in Infection and Immunity, Montreal, Quebec, Canada
| | - Chelsea Caya
- McGill Interdisciplinary Initiative in Infection and Immunity, Montreal, Quebec, Canada
| | - Emelissa Mendoza
- Zoonotic Diseases and Special Pathogens, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, Manitoba, Canada
| | - Kathy Manguiat
- Zoonotic Diseases and Special Pathogens, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, Manitoba, Canada
| | - L Robbin Lindsay
- Zoonotic Diseases and Special Pathogens, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, Manitoba, Canada
| | - Heidi Wood
- Zoonotic Diseases and Special Pathogens, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, Manitoba, Canada
| | - Michael A Drebot
- Zoonotic Diseases and Special Pathogens, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, Manitoba, Canada
| | - Antonia Dibernardo
- Zoonotic Diseases and Special Pathogens, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, Manitoba, Canada
| | - Gerasimos Zaharatos
- Division of Microbiology, Department of Clinical Laboratory Medicine, Optilab Montreal - McGill University Health Centre, Montreal, Quebec, Canada
- McGill Interdisciplinary Initiative in Infection and Immunity, Montreal, Quebec, Canada
| | - Reneé Bazin
- Affaires Médicales et Innovation, Héma-Québec, Quebec, Quebec, Canada
| | - Romain Gasser
- Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal, Montreal, Quebec, Canada
- Centre de Recherche du CHUM, Montreal, Quebec, Canada
| | | | | | - Guillaume Beaudoin-Bussières
- Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal, Montreal, Quebec, Canada
- Centre de Recherche du CHUM, Montreal, Quebec, Canada
| | - Jérémie Prévost
- Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal, Montreal, Quebec, Canada
- Centre de Recherche du CHUM, Montreal, Quebec, Canada
| | - Andrés Finzi
- Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal, Montreal, Quebec, Canada
- Centre de Recherche du CHUM, Montreal, Quebec, Canada
| | - Momar Ndao
- McGill Interdisciplinary Initiative in Infection and Immunity, Montreal, Quebec, Canada
- National Reference Centre for Parasitology, Montreal, Quebec, Canada
- J.D. MacLean Centre for Tropical Diseases, McGill University, Montreal, Quebec, Canada
| | - Cedric P Yansouni
- Division of Microbiology, Department of Clinical Laboratory Medicine, Optilab Montreal - McGill University Health Centre, Montreal, Quebec, Canada
- McGill Interdisciplinary Initiative in Infection and Immunity, Montreal, Quebec, Canada
- Division of Infectious Diseases, Department of Medicine, McGill University Health Centre, Montreal, Quebec, Canada
- J.D. MacLean Centre for Tropical Diseases, McGill University, Montreal, Quebec, Canada
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8
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Yao Z, Drecun L, Aboualizadeh F, Kim SJ, Li Z, Wood H, Valcourt EJ, Manguiat K, Plenderleith S, Yip L, Li X, Zhong Z, Yue FY, Closas T, Snider J, Tomic J, Drews SJ, Drebot MA, McGeer A, Ostrowski M, Mubareka S, Rini JM, Owen S, Stagljar I. A homogeneous split-luciferase assay for rapid and sensitive detection of anti-SARS CoV-2 antibodies. Nat Commun 2021; 12:1806. [PMID: 33753733 PMCID: PMC7985487 DOI: 10.1038/s41467-021-22102-6] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Accepted: 02/23/2021] [Indexed: 01/05/2023] Open
Abstract
Better diagnostic tools are needed to combat the ongoing COVID-19 pandemic. Here, to meet this urgent demand, we report a homogeneous immunoassay to detect IgG antibodies against SARS-CoV-2. This serological assay, called SATiN, is based on a tri-part Nanoluciferase (tNLuc) approach, in which the spike protein of SARS-CoV-2 and protein G, fused respectively to two different tNLuc tags, are used as antibody probes. Target engagement of the probes allows reconstitution of a functional luciferase in the presence of the third tNLuc component. The assay is performed directly in the liquid phase of patient sera and enables rapid, quantitative and low-cost detection. We show that SATiN has a similar sensitivity to ELISA, and its readouts are consistent with various neutralizing antibody assays. This proof-of-principle study suggests potential applications in diagnostics, as well as disease and vaccination management.
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Affiliation(s)
- Zhong Yao
- Donnelly Centre, University of Toronto, Toronto, ON, Canada
- Department of Biochemistry, University of Toronto, Toronto, ON, Canada
| | - Luka Drecun
- Donnelly Centre, University of Toronto, Toronto, ON, Canada
- Department of Molecular Genetics, University of Toronto, Toronto, ON, Canada
| | - Farzaneh Aboualizadeh
- Donnelly Centre, University of Toronto, Toronto, ON, Canada
- Department of Biochemistry, University of Toronto, Toronto, ON, Canada
| | - Sun Jin Kim
- Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Salt Lake City, UT, USA
| | - Zhijie Li
- Department of Molecular Genetics, University of Toronto, Toronto, ON, Canada
| | - Heidi Wood
- Zoonotic Diseases and Special Pathogens Division, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, MB, Canada
| | - Emelissa J Valcourt
- Zoonotic Diseases and Special Pathogens Division, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, MB, Canada
| | - Kathy Manguiat
- Zoonotic Diseases and Special Pathogens Division, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, MB, Canada
| | | | - Lily Yip
- Biological Sciences, Sunnybrook Research Institute, Toronto, ON, Canada
| | - Xinliu Li
- Department of Microbiology, Mount Sinai Hospital, Toronto, ON, Canada
| | - Zoe Zhong
- Department of Microbiology, Mount Sinai Hospital, Toronto, ON, Canada
| | - Feng Yun Yue
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON, Canada
| | | | - Jamie Snider
- Donnelly Centre, University of Toronto, Toronto, ON, Canada
- Department of Biochemistry, University of Toronto, Toronto, ON, Canada
| | - Jelena Tomic
- Donnelly Centre, University of Toronto, Toronto, ON, Canada
- Department of Biochemistry, University of Toronto, Toronto, ON, Canada
| | - Steven J Drews
- Canadian Blood Services, Edmonton, AB, Canada
- Department of Laboratory Medicine & Pathology, University of Alberta, Edmonton, AB, Canada
| | - Michael A Drebot
- Zoonotic Diseases and Special Pathogens Division, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, MB, Canada
| | - Allison McGeer
- Department of Microbiology, Mount Sinai Hospital, Toronto, ON, Canada
| | - Mario Ostrowski
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON, Canada
| | - Samira Mubareka
- Biological Sciences, Sunnybrook Research Institute, Toronto, ON, Canada
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON, Canada
| | - James M Rini
- Department of Biochemistry, University of Toronto, Toronto, ON, Canada
- Department of Molecular Genetics, University of Toronto, Toronto, ON, Canada
| | - Shawn Owen
- Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Salt Lake City, UT, USA.
- Department of Biomedical Engineering, University of Utah, Salt Lake City, UT, USA.
- Department of Medicinal Chemistry, University of Utah, Salt Lake City, UT, USA.
| | - Igor Stagljar
- Donnelly Centre, University of Toronto, Toronto, ON, Canada.
- Department of Biochemistry, University of Toronto, Toronto, ON, Canada.
- Department of Molecular Genetics, University of Toronto, Toronto, ON, Canada.
- Mediterranean Institute for Life Sciences, Split, Croatia.
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9
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Drews SJ, Devine DV, McManus J, Mendoza E, Manguiat K, Wood H, Girardin R, Dupuis A, McDonough K, Drebot M. A trend of dropping anti-SARS-CoV-2 plaque reduction neutralization test titers over time in Canadian convalescent plasma donors. Transfusion 2021; 61:1440-1446. [PMID: 33734448 DOI: 10.1111/trf.16364] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 12/19/2020] [Accepted: 01/27/2021] [Indexed: 01/06/2023]
Abstract
BACKGROUND Convalescent plasma products are a potential passive immunotherapy for Coronavirus disease 2019 (COVID-19) disease. Various approaches have been utilized to determine the concentration of Severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2)-neutralizing antibodies in plasma products. The Canadian Blood Services used Plaque Reduction Neutralization Test 50 (PRNT50) -generated values to qualify convalescent plasma donations supporting clinical trials in Canada. This manuscript describes changes in PRNT50 titers of repeat male plasma donations collected approximately 1-4 months after onset of COVID-19 signs and symptoms in donors. STUDY DESIGN AND METHODS Men were eligible to donate if they: met standard criteria, were < 67 years of age, reported a previous SARS-CoV-2-positive nucleic acid test, and recovered and were symptom free for at least 28 days prior to donation. Repeat donation analysis required at least one original and one repeat donation where a PRNT50 was performed. RESULTS From April 29, 2020 to July 25, 2020, 156 donors donated once, with 78 (50%) of the donated plasma having PRNT50 titers of ≥1:160. Thirty-seven (23.7%) of the donated plasma had a titer of 1:40 or 1:80 (individuals donating this plasma were asked to donate a second time only). A total of 30 donors (19.2%) had repeat donations. Of the repeat donors, 15 (50%) had at least an eightfold change from peak to trough PRNT50 titers within greater than 90 days after onset of COVID-19 symptoms. CONCLUSIONS Blood operators cannot infer that SARS-CoV-2 PRNT50 will remain high in repeat plasma donors 3-4 months after onset of COVID-19 symptoms.
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Affiliation(s)
- Steven J Drews
- Microbiology, Canadian Blood Services, Edmonton, Alberta, Canada.,Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta, Canada
| | - Dana V Devine
- Canadian Blood Services, Vancouver, British Columbia, Canada.,Centre for Blood Research and Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | - Janet McManus
- Canadian Blood Services, Vancouver, British Columbia, Canada
| | - Emelissa Mendoza
- Zoonotic Diseases and Special Pathogens, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, Manitoba, Canada
| | - Kathy Manguiat
- Zoonotic Diseases and Special Pathogens, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, Manitoba, Canada
| | - Heidi Wood
- Zoonotic Diseases and Special Pathogens, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, Manitoba, Canada
| | - Roxie Girardin
- Wadsworth Center, New York State Department of Health, Albany, New York, USA
| | - Alan Dupuis
- Wadsworth Center, New York State Department of Health, Albany, New York, USA
| | - Kathleen McDonough
- Wadsworth Center, New York State Department of Health, Albany, New York, USA.,Department of Biomedical Sciences, School of Public Health, University at Albany, Albany, New York, USA
| | - Michael Drebot
- Zoonotic Diseases and Special Pathogens, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, Manitoba, Canada.,Department of Medical Microbiology and Infectious Diseases, University of Manitoba, Winnipeg, Manitoba, Canada
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10
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Valcourt EJ, Manguiat K, Robinson A, Chen JCY, Dimitrova K, Philipson C, Lamoureux L, McLachlan E, Schiffman Z, Drebot MA, Wood H. Evaluation of a commercially-available surrogate virus neutralization test for severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2). Diagn Microbiol Infect Dis 2020; 99:115294. [PMID: 33387896 PMCID: PMC7758721 DOI: 10.1016/j.diagmicrobio.2020.115294] [Citation(s) in RCA: 67] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2020] [Revised: 11/06/2020] [Accepted: 12/08/2020] [Indexed: 01/18/2023]
Abstract
There remains an urgent need for assays to quantify humoral protective immunity to SARS-CoV-2 to understand the immune responses of COVID-19 patients, evaluate efficacy of vaccine candidates in clinical trials, and conduct large-scale epidemiological studies. The plaque-reduction neutralization test (PRNT) is the reference-standard for quantifying antibodies capable of neutralizing SARS-CoV-2. However, the PRNT is logistically demanding, time-consuming, and requires containment level-3 facilities to safely work with live virus. In contrast, a surrogate virus neutralization test (sVNT) manufactured by Genscript is a quick and simple assay that detects antibodies that inhibit the RBD-ACE2 interaction, crucial for virus entry into host cells. In this study, we evaluate the sensitivity, specificity, and cross-reactivity of the sVNT compared with the PRNT using both 50% and 90% SARS-CoV-2 neutralization as a reference-standard. We found that the sVNT provides a high-throughput screening tool prior to confirmatory PRNT testing for the evaluation of SARS-CoV-2 neutralizing antibodies.
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Affiliation(s)
- Emelissa J Valcourt
- Zoonotic Diseases and Special Pathogens, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, MB, Canada; Max Rady College of Medicine, University of Manitoba, Winnipeg, MB, Canada
| | - Kathy Manguiat
- Zoonotic Diseases and Special Pathogens, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, MB, Canada
| | - Alyssia Robinson
- Zoonotic Diseases and Special Pathogens, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, MB, Canada
| | - Julie Chih-Yu Chen
- Bioinformatics, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, MB, Canada
| | - Kristina Dimitrova
- Zoonotic Diseases and Special Pathogens, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, MB, Canada
| | - Clark Philipson
- Zoonotic Diseases and Special Pathogens, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, MB, Canada
| | - Lise Lamoureux
- Zoonotic Diseases and Special Pathogens, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, MB, Canada
| | - Elizabeth McLachlan
- Viral Diseases, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, MB, Canada
| | - Zachary Schiffman
- Zoonotic Diseases and Special Pathogens, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, MB, Canada; Department of Medical Microbiology and Infectious Diseases, University of Manitoba, Winnipeg, MB, Canada
| | - Michael A Drebot
- Zoonotic Diseases and Special Pathogens, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, MB, Canada; Department of Medical Microbiology and Infectious Diseases, University of Manitoba, Winnipeg, MB, Canada
| | - Heidi Wood
- Zoonotic Diseases and Special Pathogens, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, MB, Canada.
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11
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Abstract
Severe acute respiratory syndrome coronavirus‐2 (SARS‐CoV‐2) has been identified as the causal agent of COronaVIrus Disease‐19 (COVID‐19), an atypical pneumonia‐like syndrome that emerged in December 2019. While SARS‐CoV‐2 titers can be measured by detection of viral nucleic acid, this method is unable to quantitate infectious virions. Measurement of infectious SARS‐CoV‐2 can be achieved by tissue culture infectious dose−50 (TCID50), which detects the presence or absence of cytopathic effect in cells infected with serial dilutions of a virus specimen. However, this method only provides a qualitative infectious virus titer. Plaque assays are a quantitative method of measuring infectious SARS‐CoV‐2 by quantifying the plaques formed in cell culture upon infection with serial dilutions of a virus specimen. As such, plaque assays remain the gold standard in quantifying concentrations of replication‐competent lytic virions. Here, we describe two detailed plaque assay protocols to quantify infectious SARS‐CoV‐2 using different overlay and staining methods. Both methods have several advantages and disadvantages, which can be considered when choosing the procedure best suited for each laboratory. These assays can be used for several research purposes, including titration of virus stocks produced from infected cell supernatant and, with further optimization, quantification of SARS‐CoV‐2 in specimens collected from infected animals. © 2019 The Authors. Basic Protocol: SARS‐CoV‐2 plaque assay using a solid double overlay method Alternate Protocol: SARS‐CoV‐2 plaque assay using a liquid overlay and fixation‐staining method
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Affiliation(s)
- Emelissa J Mendoza
- Zoonotic Diseases and Special Pathogens, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, Manitoba, Canada
| | - Kathy Manguiat
- Zoonotic Diseases and Special Pathogens, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, Manitoba, Canada
| | - Heidi Wood
- Zoonotic Diseases and Special Pathogens, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, Manitoba, Canada
| | - Michael Drebot
- Zoonotic Diseases and Special Pathogens, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, Manitoba, Canada
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12
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Majer A, Medina SJ, Sorensen D, Martin MJ, Frost KL, Phillipson C, Manguiat K, Booth SA. The cell type resolved mouse transcriptome in neuron-enriched brain tissues from the hippocampus and cerebellum during prion disease. Sci Rep 2019; 9:1099. [PMID: 30705335 PMCID: PMC6355796 DOI: 10.1038/s41598-018-37715-z] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Accepted: 12/12/2018] [Indexed: 01/10/2023] Open
Abstract
Multiple cell types and complex connection networks are an intrinsic feature of brain tissue. In this study we used expression profiling of specific microscopic regions of heterogeneous tissue sections isolated by laser capture microdissection (LCM) to determine insights into the molecular basis of brain pathology in prion disease. Temporal profiles in two mouse models of prion disease, bovine spongiform encephalopathy (BSE) and a mouse-adapted strain of scrapie (RML) were performed in microdissected regions of the CA1 hippocampus and granular layer of the cerebellum which are both enriched in neuronal cell bodies. We noted that during clinical disease the number of activated microglia and astrocytes that occur in these areas are increased, thereby likely diluting the neuronal gene expression signature. We performed a comparative analysis with gene expression profiles determined from isolated populations of neurons, microglia and astrocytes to identify transcripts that are enriched in each of these cell types. Although the incubation periods of these two models are quite different, over 300 days for BSE and ~160 days for RML scrapie, these regional microdissections revealed broadly similar profiles. Microglial and astrocyte-enriched genes contributed a profound inflammatory profile consisting of inflammatory cytokines, genes related to phagocytosis, proteolysis and genes coding for extracellular matrix proteins. CA1 pyramidal neurons displayed a net upregulation of transcription factors and stress induced genes at pre-clinical stages of disease while all tissues showed profound decrease of overlapping genes related to neuronal function, in particular transcripts related to neuronal communication including glutamate receptors, phosphatase subunits and numerous synapse-related markers. Of note, we found a small number of genes expressed in neurons that were upregulated during clinical disease including, COX6A2, FZD9, RXRG and SOX11, that may be biomarkers of neurodegeneration.
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Affiliation(s)
- Anna Majer
- Zoonotic Diseases and Special Pathogens, National Microbiology Laboratory, Canadian Science Centre for Human and Animal Health, Public Health Agency of Canada, Winnipeg, Manitoba, Canada.,Viral Diseases, National Microbiology Laboratory, Canadian Science Centre for Human and Animal Health, Public Health Agency of Canada, Winnipeg, Manitoba, Canada
| | - Sarah J Medina
- Zoonotic Diseases and Special Pathogens, National Microbiology Laboratory, Canadian Science Centre for Human and Animal Health, Public Health Agency of Canada, Winnipeg, Manitoba, Canada
| | - Debra Sorensen
- Zoonotic Diseases and Special Pathogens, National Microbiology Laboratory, Canadian Science Centre for Human and Animal Health, Public Health Agency of Canada, Winnipeg, Manitoba, Canada
| | - Matthew J Martin
- Zoonotic Diseases and Special Pathogens, National Microbiology Laboratory, Canadian Science Centre for Human and Animal Health, Public Health Agency of Canada, Winnipeg, Manitoba, Canada.,Department of Medical Microbiology and Infectious Diseases, College of Medicine, Faculty of Health Sciences, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Kathy L Frost
- Zoonotic Diseases and Special Pathogens, National Microbiology Laboratory, Canadian Science Centre for Human and Animal Health, Public Health Agency of Canada, Winnipeg, Manitoba, Canada
| | - Clark Phillipson
- Zoonotic Diseases and Special Pathogens, National Microbiology Laboratory, Canadian Science Centre for Human and Animal Health, Public Health Agency of Canada, Winnipeg, Manitoba, Canada
| | - Kathy Manguiat
- Zoonotic Diseases and Special Pathogens, National Microbiology Laboratory, Canadian Science Centre for Human and Animal Health, Public Health Agency of Canada, Winnipeg, Manitoba, Canada
| | - Stephanie A Booth
- Zoonotic Diseases and Special Pathogens, National Microbiology Laboratory, Canadian Science Centre for Human and Animal Health, Public Health Agency of Canada, Winnipeg, Manitoba, Canada. .,Department of Medical Microbiology and Infectious Diseases, College of Medicine, Faculty of Health Sciences, University of Manitoba, Winnipeg, Manitoba, Canada.
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13
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McDermid A, Le Saux N, Grudeski E, Bettinger JA, Manguiat K, Halperin SA, Macdonald L, Déry P, Embree J, Vaudry W, Booth TF. Molecular characterization of rotavirus isolates from select Canadian pediatric hospitals. BMC Infect Dis 2012; 12:306. [PMID: 23153184 PMCID: PMC3519651 DOI: 10.1186/1471-2334-12-306] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2012] [Accepted: 11/07/2012] [Indexed: 01/09/2023] Open
Abstract
BACKGROUND We report the first multi-site rotavirus genotype analysis in Canada. Prior to this study, there was a dearth of rotavirus G and P genotyping data in Canada. Publically funded universal rotavirus vaccination in Canada started in 2011 and has been introduced by four provinces to date. Uptake of rotavirus vaccines in Canada prior to 2012 has been very limited. The aim of this study was to describe the genotypes of rotavirus strains circulating in Canada prior to widespread implementation of rotavirus vaccine by genotyping samples collected from selected paediatric hospitals. Secondly we identified rotavirus strains that differed genetically from those included in the vaccines and which could affect vaccine effectiveness. METHODS Stool specimens were collected by opportunity sampling of children with gastroenteritis who presented to emergency departments. Samples were genotyped for G (VP7) genotypes and P (VP4) genotypes by hemi-nested multiplex PCR methods. Phylogenetic analysis was carried out on Canadian G9 strains to investigate their relationship to G9 strains that have circulated in other regions of the world. RESULTS 348 samples were collected, of which 259 samples were rotavirus positive and genotyped. There were 34 rotavirus antigen immunoassay negative samples genotyped using PCR-based methods. Over the four rotavirus seasons, 174 samples were G1P[8], 45 were G3P[8], 22 were G2P[4], 13 were G9P[8], 3 were G4P[8] and 2 were G9P[4]. Sequence analysis showed that all Canadian G9 isolates are within lineage III. CONCLUSIONS Although a limited number of samples were obtained from a median of 4 centres during the 4 years of the study, it appears that currently approved rotavirus vaccines are well matched to the rotavirus genotypes identified at these hospitals. Further surveillance to monitor the emergence of rotavirus genotypes in Canada is warranted.
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14
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Saba R, Gushue S, Huzarewich RLCH, Manguiat K, Medina S, Robertson C, Booth SA. MicroRNA 146a (miR-146a) is over-expressed during prion disease and modulates the innate immune response and the microglial activation state. PLoS One 2012; 7:e30832. [PMID: 22363497 PMCID: PMC3281888 DOI: 10.1371/journal.pone.0030832] [Citation(s) in RCA: 123] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2011] [Accepted: 12/27/2011] [Indexed: 12/03/2022] Open
Abstract
Increasing evidence supports the involvement of microRNAs (miRNAs) in inflammatory and immune processes in prion neuropathogenesis. MiRNAs are small, non-coding RNA molecules which are emerging as key regulators of numerous cellular processes. We established miR-146a over-expression in prion-infected mouse brain tissues concurrent with the onset of prion deposition and appearance of activated microglia. Expression profiling of a variety of central nervous system derived cell-lines revealed that miR-146a is preferentially expressed in cells of microglial lineage. Prominent up-regulation of miR-146a was evident in the microglial cell lines BV-2 following TLR2 or TLR4 activation and also EOC 13.31 via TLR2 that reached a maximum 24–48 hours post-stimulation, concomitant with the return to basal levels of transcription of induced cytokines. Gain- and loss-of-function studies with miR-146a revealed a substantial deregulation of inflammatory response pathways in response to TLR2 stimulation. Significant transcriptional alterations in response to miR-146a perturbation included downstream mediators of the pro-inflammatory transcription factor, nuclear factor-kappa B (NF-κB) and the JAK-STAT signaling pathway. Microarray analysis also predicts a role for miR-146a regulation of morphological changes in microglial activation states as well as phagocytic mediators of the oxidative burst such as CYBA and NOS3. Based on our results, we propose a role for miR-146a as a potent modulator of microglial function by regulating the activation state during prion induced neurodegeneration.
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Affiliation(s)
- Reuben Saba
- Molecular PathoBiology, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, Manitoba, Canada
- Department of Medical Microbiology and Infectious Diseases, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Shantel Gushue
- Molecular PathoBiology, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, Manitoba, Canada
- Department of Medical Microbiology and Infectious Diseases, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Rhiannon L. C. H. Huzarewich
- Molecular PathoBiology, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, Manitoba, Canada
| | - Kathy Manguiat
- Molecular PathoBiology, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, Manitoba, Canada
| | - Sarah Medina
- Molecular PathoBiology, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, Manitoba, Canada
| | - Catherine Robertson
- Molecular PathoBiology, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, Manitoba, Canada
| | - Stephanie A. Booth
- Molecular PathoBiology, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, Manitoba, Canada
- Department of Medical Microbiology and Infectious Diseases, University of Manitoba, Winnipeg, Manitoba, Canada
- * E-mail:
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