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Rupprecht CE, Buchanan T, Cliquet F, King R, Müller T, Yakobson B, Yang DK. A Global Perspective on Oral Vaccination of Wildlife against Rabies. J Wildl Dis 2024; 60:241-284. [PMID: 38381612 DOI: 10.7589/jwd-d-23-00078] [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: 04/26/2023] [Accepted: 01/03/2024] [Indexed: 02/23/2024]
Abstract
The long-term mitigation of human-domestic animal-wildlife conflicts is complex and difficult. Over the last 50 yr, the primary biomedical concepts and actualized collaborative global field applications of oral rabies vaccination to wildlife serve as one dramatic example that revolutionized the field of infectious disease management of free-ranging animals. Oral vaccination of wildlife occurred in diverse locales within Africa, Eurasia, the Middle East, and North America. Although rabies is not a candidate for eradication, over a billion doses of vaccine-laden baits distributed strategically by hand, at baiting stations, or via aircraft, resulted in widespread disease prevention, control, or local disease elimination among mesocarnivores. Pure, potent, safe, and efficacious vaccines consisted of either modified-live, highly attenuated, or recombinant viruses contained within attractive, edible baits. Since the late 1970s, major free-ranging target species have included coyotes (Canis latrans), foxes (Urocyon cinereoargenteus; Vulpes vulpes), jackals (Canis aureus; Lupulella mesomelas), raccoons (Procyon lotor), raccoon dogs (Nyctereutes procyonoides), and skunks (Mephitis mephitis). Operational progress has occurred in all but the latter species. Programmatic evaluations of oral rabies vaccination success have included: demonstration of biomarkers incorporated within vaccine-laden baits in target species as representative of bait contact; serological measurement of the induction of specific rabies virus neutralizing antibodies, indicative of an immune response to vaccine; and most importantly, the decreasing detection of rabies virus antigens in the brains of collected animals via enhanced laboratory-based surveillance, as evidence of management impact. Although often conceived mistakenly as a panacea, such cost-effective technology applied to free-ranging wildlife represents a real-world, One Health application benefiting agriculture, conservation biology, and public health. Based upon lessons learned with oral rabies vaccination of mesocarnivores, opportunities for future extension to other taxa and additional diseases will have far-reaching, transdisciplinary benefits.
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Affiliation(s)
- Charles E Rupprecht
- College of Forestry, Wildlife and Environment, College of Veterinary Medicine, Auburn University, 602 Duncan Drive, Auburn, Alabama 36849, USA
| | - Tore Buchanan
- Wildlife Research and Monitoring Section, Ontario Ministry of Natural Resources and Forestry, Trent University, 2140 East Bank Drive, Peterborough, Ontario K9L1Z8, Canada
| | - Florence Cliquet
- ANSES, Nancy Laboratory for Rabies and Wildlife, European Union Reference Laboratory for Rabies Serology, European Union Reference Laboratory for Rabies, WHO Collaborating Centre for Research and Management in Zoonoses Control, WOAH Reference Laboratory for Rabies, Technopôle Agricole et Vétérinaire, Domaine de Pixérécourt, CS 40009 Malzeville, France
| | - Roni King
- Israel Nature and Parks Authority, Am V'Olamo 3, Jerusalem 95463, Israel
| | - Thomas Müller
- Institute of Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, WHO Collaborating Centre for Rabies Surveillance and Research, WOAH Reference Laboratory for Rabies, Südufer 10, 17493 Greifswald-Insel Riems, Germany
| | - Boris Yakobson
- WOAH Reference Laboratory for Rabies, Kimron Veterinary Institute, Ministry of Agriculture, Derech HaMaccabim 62, Rishon Lezion, 50250, Israel
| | - Dong-Kun Yang
- Viral Disease Division, Animal and Plant Quarantine Agency, Ministry of Agriculture, Food and Rural Affairs, 177, Hyeoksin 8-ro, Gimcheon-si, Gyeongsangbuk-do, 39660, Republic of Korea
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Davis AJ, Chipman RB, Nelson KM, Haley BS, Kirby JD, Ma X, Wallace RM, Gilbert AT. Evaluation of contingency actions to control the spread of raccoon rabies in Ohio and Virginia. Prev Vet Med 2024; 225:106145. [PMID: 38354432 DOI: 10.1016/j.prevetmed.2024.106145] [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: 09/27/2023] [Revised: 01/31/2024] [Accepted: 02/05/2024] [Indexed: 02/16/2024]
Abstract
The raccoon (Procyon lotor) variant of the rabies virus (RRV) is enzootic in the eastern United States and oral rabies vaccination (ORV) is the primary strategy to prevent and control landscape spread. Breaches of ORV management zones occasionally occur, and emergency "contingency" actions may be implemented to enhance local control. Contingency actions are an integral part of landscape-scale wildlife rabies management but can be very costly and routinely involve enhanced rabies surveillance (ERS) around the index case. We investigated two contingency actions in Ohio (2017-2019 and 2018-2021) and one in Virginia (2017-2019) using a dynamic, multi-method occupancy approach to examine relationships between specific management actions and RRV occurrence, including whether ERS was sufficient around the index case. The RRV occupancy was assessed seasonally at 100-km2 grids and we examined relationships across three spatial scales (regional management zone, RRV free regions, and local contingency areas). The location of a grid relative to the ORV management zone was the strongest predictor of RRV occupancy at the regional scale. In RRV free regions, the neighbor effect and temporal variability were most important in influencing RRV occupancy. Parenteral (hand) vaccination of raccoons was important across all three contingency action areas, but more influential in the Ohio contingency action areas where more raccoons were hand vaccinated. In the Virginia contingency action area, ORV strategies were as important in reducing RRV occupancy as a hand vaccination strategy. The management action to trap, euthanize, and test (TET) raccoons was an important method to increase ERS, yet the impacts of TET on RRV occupancy are not clear. The probability of detecting additional cases of RRV was exceptionally high (>0.95) during the season the index case occurred. The probability of detecting RRV through ERS declined in the seasons following initial TET efforts but remained higher after the contingency action compared to the ERS detection probabilities prior to index case incidence. Local RRV cases were contained within one year and eliminated within 2-3 years of each contingency action.
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Affiliation(s)
- Amy J Davis
- United States Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, National Wildlife Research Center, Fort Collins, CO, 80521, USA.
| | - Richard B Chipman
- United States Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, National Rabies Management Program, Concord, NH, 03301, USA
| | - Kathleen M Nelson
- United States Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, National Rabies Management Program, Concord, NH, 03301, USA
| | - Betsy S Haley
- United States Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, National Rabies Management Program, Concord, NH, 03301, USA
| | - Jordona D Kirby
- United States Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, National Rabies Management Program, Concord, NH, 03301, USA
| | - Xiaoyue Ma
- Centers for Disease Control and Prevention, Atlanta, GA 30333, USA
| | - Ryan M Wallace
- Centers for Disease Control and Prevention, Atlanta, GA 30333, USA
| | - Amy T Gilbert
- United States Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, National Wildlife Research Center, Fort Collins, CO, 80521, USA
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Beasley EM, Nelson KM, Slate D, Gilbert AT, Pogmore FE, Chipman RB, Davis AJ. Oral Rabies Vaccination of Raccoons (Procyon lotor) across a Development Intensity Gradient in Burlington, Vermont, USA, 2015-2017. J Wildl Dis 2024; 60:1-13. [PMID: 37972639 DOI: 10.7589/jwd-d-22-00117] [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: 08/22/2022] [Accepted: 06/27/2022] [Indexed: 11/19/2023]
Abstract
Management of the raccoon rabies virus variant in North America is conducted primarily using oral rabies vaccination (ORV). When a sufficient proportion of the population is vaccinated (∼60%), rabies transmission can be eliminated. To date, ORV programs have successfully controlled and eliminated raccoon rabies in rural areas, but there has been less success in urban areas. We studied the proportions of rabies virus neutralizing antibodies (RVNA) in a raccoon (Procyon lotor) population during a 3-yr ORV trial in developed areas of Burlington, Vermont, US. We used a modified N-mixture model to estimate raccoon abundance, RVNA seroprevalence, and capture rates jointly to examine factors that relate to ORV success to better inform management. We found that raccoon abundance was lower in less-developed areas compared to urban centers. Raccoon RVNA seroprevalence decreased as population abundance increased; it increased as the average age of the population increased. Nontarget opossum (Didelphis virginiana) captures correlated with a decrease in raccoon RVNA seroprevalence in low-development areas, suggesting that they may be competing for baits. The target bait density across the entire study area was 150 baits/km2, but a hand baiting strategy was heavily concentrated on roads, resulting in uneven bait densities within sampling sites (0-484 baits/km2). Uneven bait distribution across the study area may explain low RVNA seroprevalence in some locations. Our results suggest that increases in bait density across the study area may improve RVNA seroprevalence and support annual ORV to account for raccoon population turnover.
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Affiliation(s)
- Emily M Beasley
- University of Vermont, Department of Biology, 109 Carrigan Drive, Burlington, Vermont 05401, USA
- Current affiliation: Université de Montréal, Département de Sciences Biologiques, 1375 Avenue Thérèse-Lavoie-Roux, Montréal, Quebec H2V 0B3, Canada
- These authors contributed equally
| | - Kathleen M Nelson
- United States Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, National Rabies Management Program, 59 Chenell Drive, Suite 2, Concord, New Hampshire 03301, USA
- These authors contributed equally
| | - Dennis Slate
- United States Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, National Rabies Management Program, 59 Chenell Drive, Suite 2, Concord, New Hampshire 03301, USA
- Current affiliation: Chippewa Bay Wildlife Art and Science LLC, 1132 County Road 6, Hammond, New York 13646, USA
| | - Amy T Gilbert
- United States Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, National Wildlife Research Center, 4101 Laporte Avenue, Fort Collins, Colorado 80521, USA
| | - Frederick E Pogmore
- United States Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, 617 Comstock Road, Suite 9, Berlin, Vermont 05602, USA
| | - Richard B Chipman
- United States Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, National Rabies Management Program, 59 Chenell Drive, Suite 2, Concord, New Hampshire 03301, USA
| | - Amy J Davis
- United States Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, National Wildlife Research Center, 4101 Laporte Avenue, Fort Collins, Colorado 80521, USA
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Johnson SR, Ellis CK, Wickham CK, Selleck MR, Gilbert AT. Comparison of Ketamine-Xylazine, Butorphanol-Azaperone-Medetomidine, and Nalbuphine-Medetomidine-Azaperone for Raccoon (Procyon lotor) Immobilization. J Wildl Dis 2024; 60:95-104. [PMID: 37924235 DOI: 10.7589/jwd-d-23-00060] [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: 04/05/2023] [Accepted: 10/05/2023] [Indexed: 11/06/2023]
Abstract
Raccoons (Procyon lotor) are frequently handled using chemical immobilization in North America for management and research. In a controlled environment, we compared three drug combinations: ketamine-xylazine (KX), butorphanol-azaperone-medetomidine (BAM), and nalbuphine-medetomidine-azaperone (NalMed-A) for raccoon immobilization. In crossover comparisons, raccoons received a mean of the following: 8.66 mg/kg ketamine and 1.74 mg/kg xylazine (0.104 mL/kg KX); 0.464 mg/kg butorphanol, 0.155 mg/kg azaperone, and 0.185 mg/kg medetomidine (0.017 mL/kg BAM); and 0.800 mg/kg nalbuphine, 0.200 mg/kg azaperone, and 0.200 mg/kg medetomidine (0.020 mL/kg NalMed-A). Induction time was shortest with KX (mean±SE, 10.0±0.7 min) and longest with NalMed-A (13.0±1.3 min). A sampling procedure was completed on 89% (16/18), 72% (13/18), and 89% (16/18) of the raccoons administered KX, BAM, and NalMed-A, respectively. Reasons for incomplete sampling included inadequate immobilization (one KX and one NalMed-A), responsive behaviors (one each with KX, BAM, NalMed-A), or animal safety (four BAM). Mean recovery time for KX was 32.8±7.1 min without antagonizing and 28.6±5.2 min following delivery of an antagonist. Mean recovery time was 6.2±0.8 min for BAM and 5.1±0.5 min for NalMed-A after antagonizing. Only with KX were raccoons observed to recover without use of an antagonist. Supplemental oxygen was provided to 23% (3/13), 72% (13/18), and 71% (12/17) of raccoons immobilized with KX, BAM, and NalMed-A, respectively. Hypoxemia at <80% oxygen saturation occurred in 0% (0/17), 27% (4/15), and 6% (1/16) of the raccoons administered KX, BAM, and NalMed-A, respectively; all raccoons fully recovered from chemical immobilization. All combinations could be used for raccoon immobilization; however, the need for delivery of supplemental oxygen to a majority of raccoons immobilized with BAM and NalMed-A may limit broader use of these agents for certain field studies involving capture, sample, and release of free-ranging animals from a practical standpoint.
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Affiliation(s)
- Shylo R Johnson
- US Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, National Wildlife Research Center, 4101 LaPorte Avenue, Fort Collins, Colorado 80521, USA
| | - Christine K Ellis
- US Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, National Wildlife Research Center, 4101 LaPorte Avenue, Fort Collins, Colorado 80521, USA
- Current address: US Department of Agriculture, Animal and Plant Health Inspection Service, Veterinary Services, 2150 Centre Avenue, Building B, Fort Collins, Colorado 80526, USA
| | - Chad K Wickham
- US Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, National Wildlife Research Center, 4101 LaPorte Avenue, Fort Collins, Colorado 80521, USA
- Current address: US Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, 3375 Koapaka Street, Suite H-420, Honolulu, Hawaii 96819, USA
| | - Molly R Selleck
- US Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, National Wildlife Research Center, 4101 LaPorte Avenue, Fort Collins, Colorado 80521, USA
| | - Amy T Gilbert
- US Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, National Wildlife Research Center, 4101 LaPorte Avenue, Fort Collins, Colorado 80521, USA
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Hopken MW, Piaggio AJ, Abdo Z, Chipman RB, Mankowski CP, Nelson KM, Hilton MS, Thurber C, Tsuchiya MTN, Maldonado JE, Gilbert AT. Are rabid raccoons ( Procyon lotor) ready for the rapture? Determining the geographic origin of rabies virus-infected raccoons using RADcapture and microhaplotypes. Evol Appl 2023; 16:1937-1955. [PMID: 38143904 PMCID: PMC10739080 DOI: 10.1111/eva.13613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 09/06/2023] [Accepted: 10/18/2023] [Indexed: 12/26/2023] Open
Abstract
North America is recognized for the exceptional richness of rabies virus (RV) wildlife reservoir species. Management of RV is accomplished through vaccination targeting mesocarnivore reservoir populations, such as the raccoon (Procyon lotor) in Eastern North America. Raccoons are a common generalist species, and populations may reach high densities in developed areas, which can result in contact with humans and pets with potential exposures to the raccoon variant of RV throughout the eastern United States. Understanding the spatial movement of RV by raccoon populations is important for monitoring and refining strategies supporting the landscape-level control and local elimination of this lethal zoonosis. We developed a high-throughput genotyping panel for raccoons based on hundreds of microhaplotypes to identify population structure and genetic diversity relevant to rabies management programs. Throughout the eastern United States, we identified hierarchical population genetic structure with clusters that were connected through isolation-by-distance. We also illustrate that this genotyping approach can be used to support real-time management priorities by identifying the geographic origin of a rabid raccoon that was collected in an area of the United States that had been raccoon RV-free for 8 years. The results from this study and the utility of the microhaplotype panel and genotyping method will provide managers with information on raccoon ecology that can be incorporated into future management decisions.
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Affiliation(s)
- Matthew W. Hopken
- United States Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife ServicesNational Wildlife Research CenterFort CollinsColoradoUSA
- Department of Microbiology, Immunology, and PathologyColorado State UniversityFort CollinsColoradoUSA
| | - Antoinette J. Piaggio
- United States Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife ServicesNational Wildlife Research CenterFort CollinsColoradoUSA
| | - Zaid Abdo
- Department of Microbiology, Immunology, and PathologyColorado State UniversityFort CollinsColoradoUSA
| | - Richard B. Chipman
- United States Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife ServicesNational Rabies Management ProgramConcordNew HampshireUSA
| | - Clara P. Mankowski
- United States Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife ServicesNational Wildlife Research CenterFort CollinsColoradoUSA
- Department of Microbiology, Immunology, and PathologyColorado State UniversityFort CollinsColoradoUSA
| | - Kathleen M. Nelson
- United States Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife ServicesNational Rabies Management ProgramConcordNew HampshireUSA
| | - Mikaela Samsel Hilton
- United States Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife ServicesNational Wildlife Research CenterFort CollinsColoradoUSA
| | - Christine Thurber
- United States Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife ServicesNational Rabies Management ProgramConcordNew HampshireUSA
| | - Mirian T. N. Tsuchiya
- Data Science Lab, Office of the Chief Information OfficerSmithsonian InstitutionWashingtonDCUSA
- Center for Conservation GenomicsSmithsonian National Zoo and Conservation Biology InstituteWashingtonDCUSA
| | - Jesús E. Maldonado
- Center for Conservation GenomicsSmithsonian National Zoo and Conservation Biology InstituteWashingtonDCUSA
| | - Amy T. Gilbert
- United States Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife ServicesNational Wildlife Research CenterFort CollinsColoradoUSA
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Hill JE, Miller ML, Helton JL, Chipman RB, Gilbert AT, Beasley JC, Dharmarajan G, Rhodes OE. Raccoon spatial ecology in the rural southeastern United States. PLoS One 2023; 18:e0293133. [PMID: 37943745 PMCID: PMC10635488 DOI: 10.1371/journal.pone.0293133] [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: 06/26/2023] [Accepted: 10/06/2023] [Indexed: 11/12/2023] Open
Abstract
The movement ecology of raccoons varies widely across habitats with important implications for the management of zoonotic diseases such as rabies. However, the spatial ecology of raccoons remains poorly understood in many regions of the United States, particularly in the southeast. To better understand the spatial ecology of raccoons in the southeastern US, we investigated the role of sex, season, and habitat on monthly raccoon home range and core area sizes in three common rural habitats (bottomland hardwood, upland pine, and riparian forest) in South Carolina, USA. From 2018-2022, we obtained 264 monthly home ranges from 46 raccoons. Mean monthly 95% utilization distribution (UD) sizes ranged from 1.05 ± 0.48 km2 (breeding bottomland females) to 5.69 ± 3.37 km2 (fall riparian males) and mean monthly 60% UD sizes ranged from 0.25 ± 0.15 km2 (breeding bottomland females) to 1.59 ± 1.02 km2 (summer riparian males). Males maintained home range and core areas ~2-5 times larger than females in upland pine and riparian habitat throughout the year, whereas those of bottomland males were only larger than females during the breeding season. Home ranges and core areas of females did not vary across habitats, whereas male raccoons had home ranges and core areas ~2-3 times larger in upland pine and riparian compared to bottomland hardwood throughout much of the year. The home ranges of males in upland pine and riparian are among the largest recorded for raccoons in the United States. Such large and variable home ranges likely contribute to elevated risk of zoonotic disease spread by males in these habitats. These results can be used to inform disease mitigation strategies in the southeastern United States.
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Affiliation(s)
- Jacob E. Hill
- Savannah River Ecology Laboratory, University of Georgia, Aiken, SC, United States of America
| | - Madison L. Miller
- Savannah River Ecology Laboratory, University of Georgia, Aiken, SC, United States of America
| | - James L. Helton
- Savannah River Ecology Laboratory, University of Georgia, Aiken, SC, United States of America
- Warnell School of Forestry and Natural Resources, University of Georgia, Athens, GA, United States of America
| | - Richard B. Chipman
- National Rabies Management Program, USDA, APHIS, Wildlife Services, Concord, NH, United States of America
| | - Amy T. Gilbert
- National Wildlife Research Center, USDA, APHIS, Wildlife Services, Fort Collins, CO, United States of America
| | - James C. Beasley
- Savannah River Ecology Laboratory, University of Georgia, Aiken, SC, United States of America
- Warnell School of Forestry and Natural Resources, University of Georgia, Athens, GA, United States of America
| | - Guha Dharmarajan
- Savannah River Ecology Laboratory, University of Georgia, Aiken, SC, United States of America
| | - Olin E. Rhodes
- Savannah River Ecology Laboratory, University of Georgia, Aiken, SC, United States of America
- Odum School of Ecology, University of Georgia, Athens, GA, United States of America
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Hopken MW, Gilfillan D, Gilbert AT, Piaggio AJ, Hilton MS, Pierce J, Kimball B, Abdo Z. Biodiversity indices and Random Forests reveal the potential for striped skunk (Mephitis mephitis) fecal microbial communities to function as a biomarker for oral rabies vaccination. PLoS One 2023; 18:e0285852. [PMID: 37607164 PMCID: PMC10443867 DOI: 10.1371/journal.pone.0285852] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Accepted: 04/24/2023] [Indexed: 08/24/2023] Open
Abstract
Wildlife disease surveillance and monitoring poses unique challenges when assessing rates of population vaccination, immunity, or infection prevalence. Non-invasively detected biomarkers can help reduce risk to both animal and field personnel during wildlife disease management activities. In this study, we investigated the utility of fecal microbiome data collected from captive striped skunks (Mephitis mephitis) in predicting rabies virus vaccination and infection status. We sequenced the hypervariable region 4 (V4) of the bacterial 16S gene and estimated alpha and beta diversity across timepoints in three groups of skunks: vaccination then rabies virus infection, sham vaccination then rabies virus infection, and rabies virus infected without vaccination. Alpha diversity did not differ among treatment groups but beta diversity between treatments was statistically significant. The phyla Firmicutes and Proteobacteria were dominant among all samples. Using Random Forests, we identified operational taxonomic units (OTUs) that greatly influenced classification of fecal samples into treatment groups. Each of these OTUs was correlated with fecal volatile organic compounds detected from the samples for companion treatment groups in another study. This research is the first to highlight striped skunk microbiome biodiversity as a vaccination biomarker which pushes the frontier on alternative methods for surveillance and monitoring of vaccination and disease in wildlife populations.
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Affiliation(s)
- Matthew W. Hopken
- United States Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, National Wildlife Research Center, Fort Collins, Colorado, United States of America
- Department of Microbiology, Immunology, and Pathology, Colorado State University, Fort Collins, Colorado, United States of America
| | - Darby Gilfillan
- Department of Microbiology, Immunology, and Pathology, Colorado State University, Fort Collins, Colorado, United States of America
| | - Amy T. Gilbert
- United States Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, National Wildlife Research Center, Fort Collins, Colorado, United States of America
| | - Antoinette J. Piaggio
- United States Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, National Wildlife Research Center, Fort Collins, Colorado, United States of America
| | - Mikaela Samsel Hilton
- United States Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, National Wildlife Research Center, Fort Collins, Colorado, United States of America
| | - James Pierce
- Department of Microbiology, Immunology, and Pathology, Colorado State University, Fort Collins, Colorado, United States of America
| | - Bruce Kimball
- Monell Chemical Senses Center, Philadelphia, Pennsylvania, United States of America
| | - Zaid Abdo
- Department of Microbiology, Immunology, and Pathology, Colorado State University, Fort Collins, Colorado, United States of America
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Hill JE, Helton JL, Chipman RB, Gilbert AT, Beasley JC, Dharmarajan G, Rhodes OE. Spatial ecology of translocated raccoons. Sci Rep 2023; 13:10447. [PMID: 37369730 DOI: 10.1038/s41598-023-37323-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Accepted: 06/20/2023] [Indexed: 06/29/2023] Open
Abstract
Raccoons (Procyon lotor) are routinely translocated both legally and illegally to mitigate conflicts with humans, which has contributed to the spread of rabies virus across eastern North America. The movement behavior of translocated raccoons has important ramifications for disease transmission yet remains understudied and poorly quantified. To examine the spatial ecology of raccoons following experimental translocation, we performed reciprocal 16 km-distance translocations of 30 raccoons between habitats of high and low raccoon density (bottomland hardwood and upland pine, respectively) across the Savannah River Site (SRS) in Aiken, South Carolina, USA (2018-2019). Translocation influenced patterns of raccoon space use, with translocated animals exhibiting a 13-fold increase in 95% utilization distributions (UDs) post- compared to pre-translocation (mean 95% UD 35.8 ± 36.1 km2 vs 1.96 ± 1.17 km2). Raccoons originating from upland pine habitats consistently had greater space use and larger nightly movement distances post-translocation compared to raccoons moved from bottomland hardwood habitats, whereas these differences were generally not observed prior to translocation. Estimated home ranges of male raccoons were twice the area as estimated for female raccoons, on average, and this pattern was not affected by translocation. After a transient period lasting on average 36.5 days (SD = 30.0, range = 3.25-92.8), raccoons often resumed pre-experiment movement behavior, with 95% UD sizes not different from those prior to translocation (mean = 2.27 ± 1.63km2). Most animals established new home ranges after translocation, whereas three raccoons moved > 16 km from their release point back to the original capture location. Four animals crossed a 100-m wide river within the SRS post-translocation, but this behavior was not documented among collared raccoons prior to translocation. Large increases in space use combined with the crossing of geographic barriers such as rivers may lead to elevated contact rates with conspecifics, which can heighten disease transmission risks following translocation. These results provide additional insights regarding the potential impacts of raccoon translocation towards population level risks of rabies outbreaks and underscore the need to discourage mesocarnivore translocations to prevent further spread of wildlife rabies.
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Affiliation(s)
- Jacob E Hill
- Savannah River Ecology Laboratory, University of Georgia, PO Drawer E, Aiken, SC, 29802, USA.
| | - James L Helton
- Savannah River Ecology Laboratory, University of Georgia, PO Drawer E, Aiken, SC, 29802, USA
- Warnell School of Forestry and Natural Resources, University of Georgia, 180 E Green St, Athens, GA, 30602, USA
| | - Richard B Chipman
- National Rabies Management Program, USDA, APHIS, Wildlife Services, Concord, NH, 03301, USA
| | - Amy T Gilbert
- National Wildlife Research Center, USDA, APHIS, Wildlife Services, 4101 Laporte Ave, Fort Collins, CO, 80521, USA
| | - James C Beasley
- Savannah River Ecology Laboratory, University of Georgia, PO Drawer E, Aiken, SC, 29802, USA
- Warnell School of Forestry and Natural Resources, University of Georgia, 180 E Green St, Athens, GA, 30602, USA
| | - Guha Dharmarajan
- Savannah River Ecology Laboratory, University of Georgia, PO Drawer E, Aiken, SC, 29802, USA
| | - Olin E Rhodes
- Savannah River Ecology Laboratory, University of Georgia, PO Drawer E, Aiken, SC, 29802, USA
- Odum School of Ecology, University of Georgia, 140 E Green St, Athens, GA, 30602, USA
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Helton JL, Hill JE, Bernasconi DA, Dixon WC, Chipman RB, Gilbert AT, Beasley JC, Dharmarajan G, Rhodes OE. Assessment of habitat‐specific competition for oral rabies vaccine baits between raccoons and opossums. J Wildl Manage 2023. [DOI: 10.1002/jwmg.22398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/07/2023]
Affiliation(s)
- James L. Helton
- Savannah River Ecology Laboratory, Warnell School of Forestry and Natural Resources University of Georgia, Drawer E Aiken SC 29802 USA
| | - Jacob E. Hill
- Savannah River Ecology Laboratory University of Georgia, Drawer E Aiken SC 29802 USA
| | - David A. Bernasconi
- Savannah River Ecology Laboratory, Warnell School of Forestry and Natural Resources University of Georgia, Drawer E Aiken SC 29802 USA
| | - Wesley C. Dixon
- Savannah River Ecology Laboratory, Warnell School of Forestry and Natural Resources University of Georgia, Drawer E Aiken SC 29802 USA
| | - Richard B. Chipman
- National Rabies Management Program, USDA, APHIS, Wildlife Services Concord NH 03301 USA
| | - Amy T. Gilbert
- National Wildlife Research Center, USDA, APHIS, Wildlife Services Fort Collins CO 80521 USA
| | - James C. Beasley
- Savannah River Ecology Laboratory, Warnell School of Forestry and Natural Resources University of Georgia, Drawer E Aiken SC 29802 USA
| | - Guha Dharmarajan
- School of Interwoven Arts and Sciences Krea University Sri City AP India
| | - Olin E. Rhodes
- Savannah River Ecology Laboratory, Odum School of Ecology University of Georgia, Drawer E Aiken SC 29802 USA
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10
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Interspecific Oral Rabies Vaccine Bait Competition in the Southeast United States. Appl Anim Behav Sci 2023. [DOI: 10.1016/j.applanim.2023.105897] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
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11
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Rabies transmission in the Arctic: An agent-based model reveals the effects of broad-scale movement strategies on contact risk between Arctic foxes. Ecol Modell 2023. [DOI: 10.1016/j.ecolmodel.2022.110207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
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12
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Velasco-Villa A. On skunk rabies and its prevention in North America. EQUINE VET EDUC 2023; 35:589-593. [PMID: 38651084 PMCID: PMC11034821 DOI: 10.1111/eve.13843] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Accepted: 05/26/2023] [Indexed: 04/25/2024]
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13
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Tazerji SS, Nardini R, Safdar M, Shehata AA, Duarte PM. An Overview of Anthropogenic Actions as Drivers for Emerging and Re-Emerging Zoonotic Diseases. Pathogens 2022; 11:1376. [PMID: 36422627 PMCID: PMC9692567 DOI: 10.3390/pathogens11111376] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2022] [Revised: 11/05/2022] [Accepted: 11/15/2022] [Indexed: 08/05/2023] Open
Abstract
Population growth and industrialization have led to a race for greater food and supply productivity. As a result, the occupation and population of forest areas, contact with wildlife and their respective parasites and vectors, the trafficking and consumption of wildlife, the pollution of water sources, and the accumulation of waste occur more frequently. Concurrently, the agricultural and livestock production for human consumption has accelerated, often in a disorderly way, leading to the deforestation of areas that are essential for the planet's climatic and ecological balance. The effects of human actions on other ecosystems such as the marine ecosystem cause equally serious damage, such as the pollution of this habitat, and the reduction of the supply of fish and other animals, causing the coastal population to move to the continent. The sum of these factors leads to an increase in the demands such as housing, basic sanitation, and medical assistance, making these populations underserved and vulnerable to the effects of global warming and to the emergence of emerging and re-emerging diseases. In this article, we discuss the anthropic actions such as climate changes, urbanization, deforestation, the trafficking and eating of wild animals, as well as unsustainable agricultural intensification which are drivers for emerging and re-emerging of zoonotic pathogens such as viral (Ebola virus, hantaviruses, Hendravirus, Nipah virus, rabies, and severe acute respiratory syndrome coronavirus disease-2), bacterial (leptospirosis, Lyme borreliosis, and tuberculosis), parasitic (leishmaniasis) and fungal pathogens, which pose a substantial threat to the global community. Finally, we shed light on the urgent demand for the implementation of the One Health concept as a collaborative global approach to raise awareness and educate people about the science behind and the battle against zoonotic pathogens to mitigate the threat for both humans and animals.
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Affiliation(s)
- Sina Salajegheh Tazerji
- Department of Clinical Science, Faculty of Veterinary Medicine, Science and Research Branch, Islamic Azad University, Tehran P.O. Box. 1477893855, Iran
- Young Researchers and Elites Club Science and Research Branch, Islamic Azad University; Tehran P.O. Box. 1477893855, Iran
| | - Roberto Nardini
- Istituto Zooprofilattico Sperimentale del Lazio e della Toscana “M. Aleandri”, 00178 Rome, Italy
| | - Muhammad Safdar
- Department of Breeding and Genetics, Cholistan University of Veterinary & Animal Sciences, Bahawalpur 63100, Pakistan
| | - Awad A. Shehata
- Avian and Rabbit Diseases Department, Faculty of Veterinary Medicine, University of Sadat City, Sadat City 32897, Egypt
- Research and Development Section, PerNaturam GmbH, 56290 Gödenroth, Germany
- Prophy-Institute for Applied Prophylaxis, 59159 Bönen, Germany
| | - Phelipe Magalhães Duarte
- Postgraduate Program in Animal Bioscience, Federal Rural University of Pernambuco (UFRPE), Recife, Pernambuco 52171-900, Brazil
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14
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Rabies Elimination: Is It Feasible without Considering Wildlife? J Trop Med 2022; 2022:5942693. [PMID: 36211623 PMCID: PMC9537038 DOI: 10.1155/2022/5942693] [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: 03/03/2022] [Accepted: 06/07/2022] [Indexed: 12/04/2022] Open
Abstract
Rabies is a vaccine-preventable fatal viral disease that is zoonotic in nature. In this article, we provide a justification why the agreement of the World Health Organization (WHO), the Food and Agriculture Organization (FAO), the World Organization for Animal Health (OIE), and Global Alliance for Rabies Control (GARC) on The Global Strategic Plan to End Human Deaths from Dog-mediated Rabies by 2030 should also include a more holistic approach and ecologic views.
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15
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McClure KM, Bastille‐Rousseau G, Davis AJ, Stengel CA, Nelson KM, Chipman RB, Wittemyer G, Abdo Z, Gilbert AT, Pepin KM. Accounting for animal movement improves vaccination strategies against wildlife disease in heterogeneous landscapes. ECOLOGICAL APPLICATIONS : A PUBLICATION OF THE ECOLOGICAL SOCIETY OF AMERICA 2022; 32:e2568. [PMID: 35138667 PMCID: PMC9285612 DOI: 10.1002/eap.2568] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Revised: 08/28/2021] [Accepted: 10/15/2021] [Indexed: 06/14/2023]
Abstract
Oral baiting is used to deliver vaccines to wildlife to prevent, control, and eliminate infectious diseases. A central challenge is how to spatially distribute baits to maximize encounters by target animal populations, particularly in urban and suburban areas where wildlife such as raccoons (Procyon lotor) are abundant and baits are delivered along roads. Methods from movement ecology that quantify movement and habitat selection could help to optimize baiting strategies by more effectively targeting wildlife populations across space. We developed a spatially explicit, individual-based model of raccoon movement and oral rabies vaccine seroconversion to examine whether and when baiting strategies that match raccoon movement patterns perform better than currently used baiting strategies in an oral rabies vaccination zone in greater Burlington, Vermont, USA. Habitat selection patterns estimated from locally radio-collared raccoons were used to parameterize movement simulations. We then used our simulations to estimate raccoon population rabies seroprevalence under currently used baiting strategies (actual baiting) relative to habitat selection-based baiting strategies (habitat baiting). We conducted simulations on the Burlington landscape and artificial landscapes that varied in heterogeneity relative to Burlington in the proportion and patch size of preferred habitats. We found that the benefits of habitat baiting strongly depended on the magnitude and variability of raccoon habitat selection and the degree of landscape heterogeneity within the baiting area. Habitat baiting improved seroprevalence over actual baiting for raccoons characterized as habitat specialists but not for raccoons that displayed weak habitat selection similar to radiocollared individuals, except when baits were delivered off roads where preferred habitat coverage and complexity was more pronounced. In contrast, in artificial landscapes with either more strongly juxtaposed favored habitats and/or higher proportions of favored habitats, habitat baiting performed better than actual baiting, even when raccoons displayed weak habitat preferences and where baiting was constrained to roads. Our results suggest that habitat selection-based baiting could increase raccoon population seroprevalence in urban-suburban areas, where practical, given the heterogeneity and availability of preferred habitat types in those areas. Our novel simulation approach provides a flexible framework to test alternative baiting strategies in multiclass landscapes to optimize bait-distribution strategies.
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Affiliation(s)
- Katherine M. McClure
- National Wildlife Research Center, Wildlife Services, Animal and Plant Health Inspection ServiceUnited States Department of AgricultureFort CollinsColoradoUSA
- Department of Microbiology, Immunology, and PathologyColorado State UniversityFort CollinsColoradoUSA
- Present address:
Hawai‘i Cooperative Studies UnitUniversity of Hawai‘i at HiloHiloHawai‘iUSA
| | - Guillaume Bastille‐Rousseau
- National Wildlife Research Center, Wildlife Services, Animal and Plant Health Inspection ServiceUnited States Department of AgricultureFort CollinsColoradoUSA
- Cooperative Wildlife Research LaboratorySouthern Illinois UniversityCarbondaleIllinoisUSA
| | - Amy J. Davis
- National Wildlife Research Center, Wildlife Services, Animal and Plant Health Inspection ServiceUnited States Department of AgricultureFort CollinsColoradoUSA
| | - Carolyn A. Stengel
- Wildlife Services, Animal and Plant Health Inspection ServiceUnited States Department of AgricultureConcordNew HampshireUSA
| | - Kathleen M. Nelson
- National Rabies Management Program, Wildlife Services, Animal and Plant Health Inspection ServiceUnited States Department of AgricultureConcordNew HampshireUSA
| | - Richard B. Chipman
- National Rabies Management Program, Wildlife Services, Animal and Plant Health Inspection ServiceUnited States Department of AgricultureConcordNew HampshireUSA
| | - George Wittemyer
- Fish, Wildlife, and Conservation BiologyColorado State UniversityFort CollinsColoradoUSA
| | - Zaid Abdo
- Department of Microbiology, Immunology, and PathologyColorado State UniversityFort CollinsColoradoUSA
| | - Amy T. Gilbert
- National Wildlife Research Center, Wildlife Services, Animal and Plant Health Inspection ServiceUnited States Department of AgricultureFort CollinsColoradoUSA
| | - Kim M. Pepin
- National Wildlife Research Center, Wildlife Services, Animal and Plant Health Inspection ServiceUnited States Department of AgricultureFort CollinsColoradoUSA
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16
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Data-Driven Management-A Dynamic Occupancy Approach to Enhanced Rabies Surveillance Prioritization. Viruses 2021; 13:v13091795. [PMID: 34578376 PMCID: PMC8472164 DOI: 10.3390/v13091795] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 08/31/2021] [Accepted: 09/01/2021] [Indexed: 11/17/2022] Open
Abstract
Rabies lyssavirus (RABV) is enzootic in raccoons across the eastern United States. Intensive management of RABV by oral rabies vaccination (ORV) has prevented its spread westward and shown evidence of local elimination in raccoon populations of the northeastern US. The USDA, Wildlife Services, National Rabies Management Program (NRMP) collaborates with other agencies to implement broad-scale ORV and conducts extensive monitoring to measure the effectiveness of the management. Enhanced Rabies Surveillance (ERS) was initiated during 2005 and updated in 2016 to direct surveillance efforts toward higher-value specimens by assigning points to different methods of encountering specimens for collection (strange-acting, roadkill, surveillance-trapped, etc.; specimen point values ranged from 1 to 15). We used the 2016–2019 data to re-evaluate the point values using a dynamic occupancy model. Additionally, we used ERS data from 2012–2015 and 2016–2019 to examine the impact that the point system had on surveillance data. Implementation of a point system increased positivity rates among specimens by 64%, indicating a substantial increase in the efficiency of the ERS to detect wildlife rabies. Our re-evaluation found that most points accurately reflect the value of the surveillance specimens. The notable exception was that samples from animals found dead were considerably more valuable for rabies detection than originally considered (original points = 5, new points = 20). This work demonstrates how specimen prioritization strategies can be used to refine and improve ERS in support of wildlife rabies management.
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17
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Langguth A, Leelahapongsathon K, Wannapong N, Kasemsuwan S, Ortmann S, Vos A, Böer M. Comparative Study of Optical Markers to Assess Bait System Efficiency Concerning Vaccine Release in the Oral Cavity of Dogs. Viruses 2021; 13:v13071382. [PMID: 34372588 PMCID: PMC8310038 DOI: 10.3390/v13071382] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Revised: 07/05/2021] [Accepted: 07/10/2021] [Indexed: 11/30/2022] Open
Abstract
Oral vaccination of dogs against rabies has the potential to achieve mass coverage and thus deplete the virus of its most important reservoir host species. There is, however, no established non-invasive method to evaluate vaccine release in the oral cavity, following bait ingestion. In this study, two pre-selected marker methods in conjunction with their acceptance were assessed in local Thai dogs. Shelter dogs (n = 47) were offered one of four randomized bait formulations; bait type A-, containing Green S (E142) in a fructose solution; type B-, containing Patent Blue V (E131) in a fructose solution; type C-, containing the medium used for delivery of oral rabies vaccine in baits commercially produced; and type D-, containing denatonium benzoate, which was to serve as the negative control, due to its perceived bitterness. Patent Blue V was found to possess overall stronger dyeing capacities compared to Green S. Furthermore, there was no significant difference in the acceptance or bait handling of Patent Blue V baits compared to those containing the oral rabies vaccine medium alone, suggesting the potential use of this dye as a surrogate for rabies vaccine when testing newly developed bait formats.
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Affiliation(s)
- Anna Langguth
- University of Veterinary Medicine Hannover, Foundation, Bünteweg 2, 30559 Hannover, Germany
- Correspondence:
| | - Kansuda Leelahapongsathon
- Faculty of Veterinary Medicine, Kasetsart University, Bangkok 10900, Thailand; (K.L.); (N.W.); (S.K.)
| | - Napasaporn Wannapong
- Faculty of Veterinary Medicine, Kasetsart University, Bangkok 10900, Thailand; (K.L.); (N.W.); (S.K.)
| | - Suwicha Kasemsuwan
- Faculty of Veterinary Medicine, Kasetsart University, Bangkok 10900, Thailand; (K.L.); (N.W.); (S.K.)
| | - Steffen Ortmann
- Ceva Innovation Center GmbH, Am Pharmapark, 06830 Dessau-Rosslau, Germany; (S.O.); (A.V.)
| | - Ad Vos
- Ceva Innovation Center GmbH, Am Pharmapark, 06830 Dessau-Rosslau, Germany; (S.O.); (A.V.)
| | - Michael Böer
- Department of Ethology, University of Osnabrück, Barbarastraße 11, 49076 Osnabrück, Germany;
- Institute for Terrestrial and Aquatic Wildlife Research, University of Veterinary Medicine Hannover, Foundation, Bünteweg 2, 30559 Hannover, Germany
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18
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Acharya KP, Subedi D, Wilson RT. Rabies control in South Asia requires a One Health approach. One Health 2021; 12:100215. [PMID: 33681445 PMCID: PMC7907975 DOI: 10.1016/j.onehlt.2021.100215] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Revised: 01/06/2021] [Accepted: 01/13/2021] [Indexed: 01/10/2023] Open
Abstract
Rabies is a vaccine-preventable viral disease present in more than 150 countries around the world. Globally, almost 60,000 people die each year from rabies, of which more than 58% are in Asia and around 45% in South Asia with especially high incidence in India, Pakistan and Bangladesh. Vaccination coverage of both people and stray dogs is low in the region and in general people are not given enough protection and information about pre- and post-exposure prophylaxis. Engagement of multiple sectors and One Health collaboration including community education, awareness programmes and vaccination campaigns are critical to control and elimination of rabies.
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Affiliation(s)
| | - Deepak Subedi
- Paklihawa Campus, Institute of Agriculture and Animal Science, Tribhuvan University, Rupandehi, Nepal
| | - Richard Trevor Wilson
- Independent Researcher, Kathmandu, Nepal
- Bartridge House, Umberleigh, United Kingdom, EX37 9AS
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19
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Johnson SR, Slate D, Nelson KM, Davis AJ, Mills SA, Forbes JT, VerCauteren KC, Gilbert AT, Chipman RB. Serological Responses of Raccoons and Striped Skunks to Ontario Rabies Vaccine Bait in West Virginia during 2012-2016. Viruses 2021; 13:v13020157. [PMID: 33499059 PMCID: PMC7912576 DOI: 10.3390/v13020157] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 01/15/2021] [Accepted: 01/21/2021] [Indexed: 12/29/2022] Open
Abstract
Since the 1990s, oral rabies vaccination (ORV) has been used successfully to halt the westward spread of the raccoon rabies virus (RV) variant from the eastern continental USA. Elimination of raccoon RV from the eastern USA has proven challenging across targeted raccoon (Procyon lotor) and striped skunk (Mephitis mephitis) populations impacted by raccoon RV. Field trial evaluations of the Ontario Rabies Vaccine Bait (ONRAB) were initiated to expand ORV products available to meet the rabies management goal of raccoon RV elimination. This study describes the continuation of a 2011 trial in West Virginia. Our objective was to evaluate raccoon and skunk response to ORV occurring in West Virginia for an additional two years (2012–2013) at 75 baits/km2 followed by three years (2014–2016) of evaluation at 300 baits/km2. We measured the change in rabies virus-neutralizing antibody (RVNA) seroprevalence in targeted wildlife populations by comparing levels pre- and post-ORV during each year of study. The increase in bait density from 75/km2 to 300/km2 corresponded to an increase in average post-ORV seroprevalence for raccoon and skunk populations. Raccoon population RVNA levels increased from 53% (300/565, 95% CI: 50–57%) to 82.0% (596/727, 95% CI: 79–85%) during this study, and skunk population RVNA levels increased from 11% (8/72, 95% CI: 6–20%) to 39% (51/130, 95% CI: 31–48%). The RVNA seroprevalence pre-ORV demonstrated an increasing trend across study years for both bait densities and species, indicating that multiple years of ORV may be necessary to achieve and maintain RVNA seroprevalence in target wildlife populations for the control and elimination of raccoon RV in the eastern USA.
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Affiliation(s)
- Shylo R. Johnson
- USDA/APHIS/WS/National Wildlife Research Center, 4101 LaPorte Ave., Fort Collins, CO 80521, USA; (A.J.D.); (K.C.V.); (A.T.G.)
- Correspondence:
| | - Dennis Slate
- USDA/APHIS/WS/National Rabies Management Program, 59 Chenell Dr., Concord, NH 03301, USA; (D.S.); (K.M.N.); (R.B.C.)
| | - Kathleen M. Nelson
- USDA/APHIS/WS/National Rabies Management Program, 59 Chenell Dr., Concord, NH 03301, USA; (D.S.); (K.M.N.); (R.B.C.)
| | - Amy J. Davis
- USDA/APHIS/WS/National Wildlife Research Center, 4101 LaPorte Ave., Fort Collins, CO 80521, USA; (A.J.D.); (K.C.V.); (A.T.G.)
| | - Samual A. Mills
- USDA/APHIS/Wildlife Services, 730 Yokum St., Elkins, WV 26241, USA; (S.A.M.); (J.T.F.)
| | - John T. Forbes
- USDA/APHIS/Wildlife Services, 730 Yokum St., Elkins, WV 26241, USA; (S.A.M.); (J.T.F.)
| | - Kurt C. VerCauteren
- USDA/APHIS/WS/National Wildlife Research Center, 4101 LaPorte Ave., Fort Collins, CO 80521, USA; (A.J.D.); (K.C.V.); (A.T.G.)
| | - Amy T. Gilbert
- USDA/APHIS/WS/National Wildlife Research Center, 4101 LaPorte Ave., Fort Collins, CO 80521, USA; (A.J.D.); (K.C.V.); (A.T.G.)
| | - Richard B. Chipman
- USDA/APHIS/WS/National Rabies Management Program, 59 Chenell Dr., Concord, NH 03301, USA; (D.S.); (K.M.N.); (R.B.C.)
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20
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Rohde RE, Rupprecht CE. Update on lyssaviruses and rabies: will past progress play as prologue in the near term towards future elimination? Fac Rev 2020; 9:9. [PMID: 33659941 PMCID: PMC7886060 DOI: 10.12703/b/9-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Rabies is an ancient, much-feared, and neglected infectious disease. Caused by pathogens in the family Rhabdoviridae, genus Lyssavirus, and distributed globally, this viral zoonosis results in tens of thousands of human fatalities and millions of exposures annually. All mammals are believed susceptible, but only certain taxa act as reservoirs. Dependence upon direct routing to, replication within, and passage from the central nervous system serves as a basic viral strategy for perpetuation. By a combination of stealth and subversion, lyssaviruses are quintessential neurotropic agents and cause an acute, progressive encephalitis. No treatment exists, so prevention is the key. Although not a disease considered for eradication, something of a modern rebirth has been occurring within the field as of late with regard to detection, prevention, and management as well as applied research. For example, within the past decade, new lyssaviruses have been characterized; sensitive and specific diagnostics have been optimized; pure, potent, safe, and efficacious human biologics have improved human prophylaxis; regional efforts have controlled canine rabies by mass immunization; wildlife rabies has been controlled by oral rabies vaccination over large geographic areas in Europe and North America; and debate has resumed over the controversial topic of therapy. Based upon such progress to date, there are certain expectations for the next 10 years. These include pathogen discovery, to uncover additional lyssaviruses in the Old World; laboratory-based surveillance enhancement by simplified, rapid testing; anti-viral drug appearance, based upon an improved appreciation of viral pathobiology and host response; and improvements to canine rabies elimination regionally throughout Africa, Asia, and the Americas by application of the best technical, organizational, economic, and socio-political practices. Significantly, anticipated Gavi support will enable improved access of human rabies vaccines in lesser developed countries at a national level, with integrated bite management, dose-sparing regimens, and a 1 week vaccination schedule.
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Affiliation(s)
- Rodney E Rohde
- Clinical Laboratory Science, Texas State University, San Marcos, TX, 78666, USA
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21
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A cointegration analysis of rabies cases and weather components in Davao City, Philippines from 2006 to 2017. PLoS One 2020; 15:e0236278. [PMID: 32841247 PMCID: PMC7446973 DOI: 10.1371/journal.pone.0236278] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Accepted: 07/01/2020] [Indexed: 11/19/2022] Open
Abstract
Rabies is a lethal viral disease and dogs are the major disease reservoir in the Philippines. Spatio-temporal variations in environmental factors are known to affect disease dynamics. Some rabies-affected countries considered investigating the role of weather components in driving rabies cases and it has helped them to strategize their control efforts. In this study, cointegration analysis was conducted between the monthly reported rabies cases and the weather components, such as temperature and precipitation, to verify the effect of weather components on rabies incidence in Davao City, Philippines. With the Engle-Granger cointegration tests, we found that rabies cases are cointegrated into each of the weather components. It was further validated, using the Granger causality test, that each weather component predicts the rabies cases and not vice versa. Moreover, we performed the Johansen cointegration test to show that the weather components simultaneously affect the number of rabies cases, which allowed us to estimate a vector-error correction model for rabies incidence as a function of temperature and precipitation. Our analyses showed that canine rabies in Davao City was weather-sensitive, which implies that rabies incidence could be projected using established long-run relationship among reported rabies cases, temperature, and precipitation. This study also provides empirical evidence that can guide local health officials in formulating preventive strategies for rabies control and eradication based on weather patterns.
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22
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Acharya KP, Acharya N, Phuyal S, Upadhyaya M, Lasee S. One-health approach: A best possible way to control rabies. One Health 2020; 10:100161. [PMID: 33117875 PMCID: PMC7582209 DOI: 10.1016/j.onehlt.2020.100161] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Revised: 08/14/2020] [Accepted: 08/14/2020] [Indexed: 12/25/2022] Open
Abstract
More than 75% of emerging infectious diseases and 60% of known human infectious diseases are transmitted from animals. Among these zoonoses, rabies is of utmost public health significance due to its lethality. The multi-faceted nature of zoonotic disease complicates control and prevention and thus, a multi-sectoral One Health Approach could be a better strategy to cope with rabies. Up until now, rabies prevention and control programs are conducted utilizing mass vaccination of domestic and community dogs and cats, and mass awareness programs. However, the burden of rabies has not been reduced as these approaches have failed to include all stakeholders (human, animal, and environmental health sectors) in disease management programs. The aim of this review is to highlight why and how One Health Approach would be the most effective way to control rabies in low- and middle-income countries (LMICs) like Nepal.
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Affiliation(s)
| | - Narayan Acharya
- The Institute of Environmental and Human Health, Texas Tech University, Lubbock, TX, USA
| | - Sarita Phuyal
- Central Referral Veterinary Hospital, Tripureshwar, Kathmandu, Nepal
| | - Mukul Upadhyaya
- Veterinary Epidemiology Section (VES), Department of Livestock Services (DLS), Tripureshwar, Kathmandu, Nepal
| | - Steven Lasee
- The Institute of Environmental and Human Health, Texas Tech University, Lubbock, TX, USA
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23
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Pieracci EG, Chipman RB, Morgan CN, Brown CM, Kirby JD, Blanton JD, Velasco-Villa A, Martin AD, Nelson KM, Singh A, LeMasters E, Weiner Z, Wallace RM. Evaluation of rabies virus characterization to enhance early detection of important rabies epizootic events in the United States. J Am Vet Med Assoc 2020; 256:66-76. [PMID: 31841088 DOI: 10.2460/javma.256.1.66] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To evaluate rabies virus (RABV) characterization data obtained from animal specimens submitted to the US public health rabies surveillance system and propose a standardized approach to sample selection for RABV characterization that could enhance early detection of important rabies epizootic events in the United States. SAMPLE United States public health rabies surveillance system data collected from January 1, 2010, through December 31, 2015. PROCEDURES Data were reviewed to identify RABV-positive specimens for which virus characterization would likely provide information regarding any of 4 overarching events (discovery of novel variants, translocation of RABV variants, host-shift events, and any unusual rabies-related event) that could substantially alter animal rabies epizootiology in the United States. These specimens were designated as specimens of epizootiological importance (SEIs). Estimates of the additional number of specimens that public health laboratories could expect to process each year if all SEIs underwent RABV characterization were calculated. RESULTS During the 6-year period, the mean annual number of SEIs was 855 (95% CI, 739 to 971); the mean number of SEIs that underwent virus characterization was 270 (95% CI, 187 to 353). Virus characterization of all SEIs would be expected to increase the public health laboratories' test load by approximately 585 (95% CI, 543 to 625) specimens/y. CONCLUSIONS AND CLINICAL RELEVANCE Prioritization of RABV characterization of SEIs may improve early detection of rabies events associated with RABV host shifts, variant translocations, and importation. Characterization of SEIs may help refine wildlife rabies management practices. Each public health laboratory should evaluate testing of SEIs to ensure diagnostic laboratory capacity is not overstretched.
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Kaminsky J, Keegan LT, Metcalf CJE, Lessler J. Perfect counterfactuals for epidemic simulations. Philos Trans R Soc Lond B Biol Sci 2020; 374:20180279. [PMID: 31104612 DOI: 10.1098/rstb.2018.0279] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Simulation studies are often used to predict the expected impact of control measures in infectious disease outbreaks. Typically, two independent sets of simulations are conducted, one with the intervention, and one without, and epidemic sizes (or some related metric) are compared to estimate the effect of the intervention. Since it is possible that controlled epidemics are larger than uncontrolled ones if there is substantial stochastic variation between epidemics, uncertainty intervals from this approach can include a negative effect even for an effective intervention. To more precisely estimate the number of cases an intervention will prevent within a single epidemic, here we develop a 'single-world' approach to matching simulations of controlled epidemics to their exact uncontrolled counterfactual. Our method borrows concepts from percolation approaches, prunes out possible epidemic histories and creates potential epidemic graphs (i.e. a mathematical representation of all consistent epidemics) that can be 'realized' to create perfectly matched controlled and uncontrolled epidemics. We present an implementation of this method for a common class of compartmental models (e.g. SIR models), and its application in a simple SIR model. Results illustrate how, at the cost of some computation time, this method substantially narrows confidence intervals and avoids nonsensical inferences. This article is part of the theme issue 'Modelling infectious disease outbreaks in humans, animals and plants: epidemic forecasting and control'. This theme issue is linked with the earlier issue 'Modelling infectious disease outbreaks in humans, animals and plants: approaches and important themes'.
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Affiliation(s)
- Joshua Kaminsky
- 1 Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health , Baltimore, MD , USA
| | - Lindsay T Keegan
- 1 Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health , Baltimore, MD , USA
| | - C Jessica E Metcalf
- 1 Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health , Baltimore, MD , USA.,2 Department of Ecology and Evolutionary Biology, Princeton University , Princeton, NJ , USA
| | - Justin Lessler
- 1 Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health , Baltimore, MD , USA
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Rabies Surveillance Identifies Potential Risk Corridors and Enables Management Evaluation. Viruses 2019; 11:v11111006. [PMID: 31683632 PMCID: PMC6893774 DOI: 10.3390/v11111006] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Revised: 10/12/2019] [Accepted: 10/29/2019] [Indexed: 11/17/2022] Open
Abstract
Intensive efforts are being made to eliminate the raccoon variant of rabies virus (RABV) from the eastern United States and Canada. The United States Department of Agriculture (USDA) Wildlife Services National Rabies Management Program has implemented enhanced rabies surveillance (ERS) to improve case detection across the extent of the raccoon oral rabies vaccination (ORV) management area. We evaluated ERS and public health surveillance data from 2006 to 2017 in three northeastern USA states using a dynamic occupancy modeling approach. Our objectives were to examine potential risk corridors for RABV incursion from the U.S. into Canada, evaluate the effectiveness of ORV management strategies, and identify surveillance gaps. ORV management has resulted in a decrease in RABV cases over time within vaccination zones (from occupancy ( ψ ¯ ) of 0.60 standard error (SE) = 0.03 in the spring of 2006 to ψ ¯ of 0.33 SE = 0.10 in the spring 2017). RABV cases also reduced in the enzootic area (from ψ ¯ of 0.60 SE = 0.03 in the spring of 2006 to ψ ¯ of 0.45 SE = 0.05 in the spring 2017). Although RABV occurrence was related to habitat type, greater impacts were associated with ORV and trap-vaccinate-release (TVR) campaigns, in addition to seasonal and yearly trends. Reductions in RABV occupancy were more pronounced in areas treated with Ontario Rabies Vaccine Bait (ONRAB) compared to RABORAL V-RG®. Our approach tracked changes in RABV occurrence across space and time, identified risk corridors for potential incursions into Canada, and highlighted surveillance gaps, while evaluating the impacts of management actions. Using this approach, we are able to provide guidance for future RABV management.
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Development of a Non-Meat-Based, Mass Producible and Effective Bait for Oral Vaccination of Dogs against Rabies in Goa State, India. Trop Med Infect Dis 2019; 4:tropicalmed4030118. [PMID: 31487795 PMCID: PMC6789727 DOI: 10.3390/tropicalmed4030118] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Revised: 08/28/2019] [Accepted: 08/29/2019] [Indexed: 11/16/2022] Open
Abstract
Introduction: To achieve the global goal of canine-mediated human rabies elimination by 2030 there is an urgent need to scale-up mass dog vaccination activities in regions with large dog populations that are difficult to access; a common situation in much of India. Oral rabies vaccination may enable the vaccination of free-roaming dogs that are inaccessible to parenteral vaccination, and is considered a promising complementary measure to parenteral mass dog vaccination campaigns. WHO and OIE have published detailed minimum requirements for rabies vaccines and baits to be used for this purpose, requiring that baits must not only be well-accepted by the target population but must also efficiently release the vaccine in the oral cavity. For oral rabies vaccination approaches to be successful, it is necessary to develop baits which have a high uptake by the target population, are culturally accepted and amenable to mass production. The aim of this study was to compare the interest and uptake rates of meat-based and an egg-based prototype bait constructs by free roaming dogs in Goa, India. Methods: Three teams randomly distributed two prototype baits; an egg-flavoured bait and a commercial meat dog food (gravy) flavoured bait. The outcomes of consumption were recorded and compared between baits and dog variables. Results: A total of 209 egg-bait and 195 gravy-bait distributions were recorded and analysed. No difference (p = 0.99) was found in the percentage of dogs interested in the baits when offered. However, significantly more dogs consumed the egg-bait than the gravy-bait; 77.5% versus 68.7% (p = 0.04). The release of the blue-dyed water inside the sachet in the oral cavity of the animals was significant higher in the dogs consuming an egg-bait compared to the gravy-bait (73.4% versus 56.7%, p = 0.001). Conclusions: The egg-based bait had a high uptake amongst free roaming dogs and also enabled efficient release of the vaccine in the oral cavity, whilst also avoiding culturally relevant materials of bovine or porcine meat products.
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Davis AJ, Kirby JD, Chipman RB, Nelson KM, Xifara T, Webb CT, Wallace R, Gilbert AT, Pepin KM. Not all surveillance data are created equal—A multi‐method dynamic occupancy approach to determine rabies elimination from wildlife. J Appl Ecol 2019. [DOI: 10.1111/1365-2664.13477] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Amy J. Davis
- United States Department of Agriculture, Animal and Plant Health Inspection Service Wildlife Services National Wildlife Research Center Fort Collins CO USA
| | - Jordona D. Kirby
- United States Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, National Rabies Management Program Concord NH USA
| | - Richard B. Chipman
- United States Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, National Rabies Management Program Concord NH USA
| | - Kathleen M. Nelson
- United States Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, National Rabies Management Program Concord NH USA
| | - Tatiana Xifara
- United States Department of Agriculture, Animal and Plant Health Inspection Service Wildlife Services National Wildlife Research Center Fort Collins CO USA
- Department of Biology Colorado State University Fort Collins CO USA
| | - Colleen T. Webb
- Department of Biology Colorado State University Fort Collins CO USA
| | - Ryan Wallace
- Centers for Disease Control and Prevention Atlanta GA USA
| | - Amy T. Gilbert
- United States Department of Agriculture, Animal and Plant Health Inspection Service Wildlife Services National Wildlife Research Center Fort Collins CO USA
| | - Kim M. Pepin
- United States Department of Agriculture, Animal and Plant Health Inspection Service Wildlife Services National Wildlife Research Center Fort Collins CO USA
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Spatial ecology of urban striped skunks (Mephitis mephitis) in the Northern Great Plains: a framework for future oral rabies vaccination programs. Urban Ecosyst 2019. [DOI: 10.1007/s11252-019-00844-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Calderón A, Guzmán C, Mattar S, Rodríguez V, Acosta A, Martínez C. Frugivorous bats in the Colombian Caribbean region are reservoirs of the rabies virus. Ann Clin Microbiol Antimicrob 2019; 18:11. [PMID: 30890183 PMCID: PMC6423830 DOI: 10.1186/s12941-019-0308-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Accepted: 02/12/2019] [Indexed: 12/20/2022] Open
Abstract
Background Bats are an important ecological group within ecosystems. The rabies virus is a Lyssavirus, and haematophagous bats are the principal reservoir; however, the virus has also been detected in non-haematophagous bats. The objective was to determine the rabies virus in non-haematophagous bats in the Colombian Caribbean region. Methods In 2017, a cross-sectional study was carried out with a base-risk sampling in twelve geographic zones of the Colombian Caribbean area that included the main ecosystems of two departments. 286 bats were captured, which were euthanized with a pharmacological treatment following the ethical protocols of animal experimentation. The taxonomic identification was done with dichotomous keys. The necropsy was carried out at the capture site, and brain samples were kept in liquid nitrogen. The extraction of the RNA was carried out from the frozen brains with Trizol™; a fragment of 914 bp of the glycoprotein G of the rabies virus was amplified with RT-PCR. The amplicons were sequenced with the Sanger method. Results Twenty-three genera of bats were identified, and, in two frugivorous, Artibeus lituratus and Artibeus planirostris, amplicons were obtained and sequenced as the rabies virus. Conclusions This is the first evidence of natural infection of the rabies virus in frugivorous bats in the Colombian Caribbean area; this result is important for the surveillance and control of rabies.
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Affiliation(s)
- Alfonso Calderón
- Instituto de Investigaciones Biológicas del Trópico (IIBT), Facultad de Medicina Veterinaria y Zootecnia, Doctorado en Medicina Tropical, Universidad de Córdoba, Carrera 6 No 76-103., Monteria, Córdoba, Colombia
| | - Camilo Guzmán
- Instituto de Investigaciones Biológicas del Trópico (IIBT), Programa Regencia en Farmacia, Facultad de Ciencias de la Salud, Doctorado en Medicina Tropical, Universidad de Córdoba, Monteria, Colombia
| | - Salim Mattar
- Instituto de Investigaciones Biológicas del Trópico (IIBT), Facultad de Medicina Veterinaria y Zootecnia, Doctorado en Medicina Tropical, Universidad de Córdoba, Carrera 6 No 76-103., Monteria, Córdoba, Colombia.
| | - Virginia Rodríguez
- Grupo de Investigaciones Microbiológicas y Biomédicas de Córdoba (GIMBIC). Programa de Bacteriología, Facultad de Ciencias de la Salud, Universidad de Córdoba, Monteria, Colombia
| | - Arles Acosta
- Producción Animal Tropical Facultad de Medicina Veterinaria y Zootecnia, Universidad de Córdoba, Monteria, Colombia
| | - Caty Martínez
- Producción Animal Tropical Facultad de Medicina Veterinaria y Zootecnia, Universidad de Córdoba, Monteria, Colombia
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Basinski AJ, Nuismer SL, Remien CH. A little goes a long way: Weak vaccine transmission facilitates oral vaccination campaigns against zoonotic pathogens. PLoS Negl Trop Dis 2019; 13:e0007251. [PMID: 30849126 PMCID: PMC6426267 DOI: 10.1371/journal.pntd.0007251] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Revised: 03/20/2019] [Accepted: 02/19/2019] [Indexed: 01/06/2023] Open
Abstract
Zoonotic pathogens such as Ebola and rabies pose a major health risk to humans. One proven approach to minimizing the impact of a pathogen relies on reducing its prevalence within animal reservoir populations using mass vaccination. However, two major challenges remain for vaccination programs that target free-ranging animal populations. First, limited or challenging access to wild hosts, and second, expenses associated with purchasing and distributing the vaccine. Together, these challenges constrain a campaign's ability to maintain adequate levels of immunity in the host population for an extended period of time. Transmissible vaccines could lessen these constraints, improving our ability to both establish and maintain herd immunity in free-ranging animal populations. Because the extent to which vaccine transmission could augment current wildlife vaccination campaigns is unknown, we develop and parameterize a mathematical model that describes long-term mass vaccination campaigns in the US that target rabies in wildlife. The model is used to investigate the ability of a weakly transmissible vaccine to (1) increase vaccine coverage in campaigns that fail to immunize at levels required for herd immunity, and (2) decrease the expense of campaigns that achieve herd immunity. When parameterized to efforts that target rabies in raccoons using vaccine baits, our model indicates that, with current vaccination efforts, a vaccine that transmits to even one additional host per vaccinated individual could sufficiently augment US efforts to preempt the spread of the rabies virus. Higher levels of transmission are needed, however, when spatial heterogeneities associated with flight-line vaccination are incorporated into the model. In addition to augmenting deficient campaigns, our results show that weak vaccine transmission can reduce the costs of vaccination campaigns that are successful in attaining herd immunity.
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Affiliation(s)
- Andrew J. Basinski
- Department of Mathematics. University of Idaho, Moscow, Idaho, United States of America
| | - Scott L. Nuismer
- Department of Biological Sciences. University of Idaho, Moscow, Idaho, United States of America
| | - Christopher H. Remien
- Department of Mathematics. University of Idaho, Moscow, Idaho, United States of America
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Newton EJ, Pond BA, Tinline RR, Middel K, Bélanger D, Rees EE. Differential impacts of vaccination on wildlife disease spread during epizootic and enzootic phases. J Appl Ecol 2019. [DOI: 10.1111/1365-2664.13339] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Erica J. Newton
- Wildlife Research and Monitoring SectionOntario Ministry of Natural Resources and ForestryTrent University Peterborough ON Canada
| | - Bruce A. Pond
- Wildlife Research and Monitoring SectionOntario Ministry of Natural Resources and ForestryTrent University Peterborough ON Canada
| | | | - Kevin Middel
- Wildlife Research and Monitoring SectionOntario Ministry of Natural Resources and ForestryTrent University Peterborough ON Canada
| | - Denise Bélanger
- Département de pathologie et microbiologieGroupe de recherche en épidémiologie des zoonoses et santé publiqueUniversité de Montréal Saint‐Hyacinthe QC Canada
| | - Erin E. Rees
- Département de pathologie et microbiologieGroupe de recherche en épidémiologie des zoonoses et santé publiqueUniversité de Montréal Saint‐Hyacinthe QC Canada
- Public Health Risk Sciences DivisionNational Microbiology LaboratoryPublic Health Agency of Canada Saint‐Hyacinthe Québec Canada
- Land and Sea Systems Analysis Inc. Granby QC Canada
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Knowledge, attitudes, and practices regarding rabies in Grenada. PLoS Negl Trop Dis 2019; 13:e0007079. [PMID: 30695024 PMCID: PMC6368385 DOI: 10.1371/journal.pntd.0007079] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Revised: 02/08/2019] [Accepted: 12/14/2018] [Indexed: 11/19/2022] Open
Abstract
Objective While Grenada attained a zero-human-rabies case status since 1970, the authors conducted the first study to assess knowledge, attitudes, and practices that may contribute to this status as well as to receive feedback on the rabies control program in Grenada. Methodology A cross-sectional survey was conducted in July, 2017 with 996 households on the mainland. A questionnaire was administered to collect information on knowledge of rabies and prevention, vaccination practices, perception of institutional responsibilities for rabies control, and evaluation of the anti-rabies program. Results Of the 996 households, 617 (62%) had owners of animals that can be infected with rabies and were included in the analysis. Respondents were very aware of rabies as a disease that can infect animals and humans. The rate of participation in the vaccination program was 51.6% for pets and 38.0% for livestock. About 40% of respondents were knowledgeable about the extent of protection from the rabies vaccine. Respondents did not demonstrate exceptionally high levels of knowledge about animals that were likely to be infected with rabies, neither the anti-rabies programs that were conducted in Grenada. The three most frequent recommendations made to improve the rabies-control programs were: increase education programs, control the mongoose population, and expand the vaccination period each year. Conclusions Conducting a comprehensive national rabies education program, expanding the vaccination program, and increasing the rate of animal vaccination are important steps that need to be taken to maintain the current zero-human-case status. About 62% of households in Grenada owned animals that are susceptible to rabies. Pets, particularly dogs, were more commonly owned than livestock. Males were more likely to correctly identify animals that are susceptible to rabies. The level of participation in the animal vaccination program was low, especially among owners of livestock. A lack of knowledge about the free anti-rabies vaccination service and the length of time that it took to vaccinate animals were the most common problems associated with the low vaccination rate. Increasing education programs, controlling the mongoose population, and increasing the vaccination times per year were the most frequent recommendations to improve the Ministry of Health rabies control programs. The anti-rabies program remains a critical step to maintain the current zero-human-case status in Grenada. There is a need to also expand the vaccination program and increase the rate of animal vaccination.
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Gilbertson M, Craft M, Potter T. PLANETARY GRAND CHALLENGES: A CALL FOR INTERDISCIPLINARY PARTNERSHIPS. INTERDISCIPLINARY JOURNAL OF PARTNERSHIP STUDIES 2019; 6:1-17. [PMID: 33912682 PMCID: PMC8078133 DOI: 10.24926/ijps.v6i1.1976] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Universities have traditionally been places where individual scholars work on individual topics, in individual disciplines, with individual funding. Even though large research institutions include all the major disciplines, faculty and students remain in their schools or colleges, rarely crossing the campus to interact. Matters do not improve once knowledge is generated. Each discipline has its own journals, its own conferences, and its own professional organizations. The academy was designed to support unparalleled expertise in specialized knowledge. However, universities are beginning to realize that the greatest challenges we face are systems problems and can only be solved by systems thinking and systems solutions. Climate change, antibiotic resistance, water scarcity, and unsustainable population growth are just a few of the planetary health crises that require interdisciplinary partnerships to solve. Fortunately, we are beginning to see early signs of a shift toward, and even normalization of, interdisciplinary collaboration. In fact, some national grants require team members from different fields as a stipulation for funding. Interdisciplinary research permits cross-field benefits in which the synergy of two or more knowledge sets is greater than the sum of its parts. Innovation increases and previously elusive solutions become possible. The field of partnership studies closely aligns with the vision and mission of interdisciplinarity and offers a philosophical framework to guide teaching and research.
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Affiliation(s)
| | - Meggan Craft
- College of Veterinary Medicine at the University of Minnesota
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EFFECT OF HIGH-DENSITY ORAL RABIES VACCINE BAITING ON RABIES VIRUS NEUTRALIZING ANTIBODY RESPONSE IN RACCOONS ( PROCYON LOTOR). J Wildl Dis 2018; 55:399-409. [PMID: 30507337 DOI: 10.7589/2018-05-138] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
From 2014 to 2016, we examined the effect of distributing oral rabies vaccine baits at high density (150 baits/km2) in an area of Virginia, US that was naïve to oral rabies vaccination prior to the study. We also compared the effect of baiting at high density in a naïve area to baiting at standard density (75 baits/km2) in an area that had been baited annually for 12 yr. Our results suggested that rabies virus seroconversion in raccoons ( Procyon lotor) gradually increased each year under the highdensity bait treatment. However, we did not detect a difference in seroconversion between bait density treatments. Virginia opossums ( Didelphis virginiana) were abundant in the study area and were a potentially important nontarget species that competed for oral rabies vaccine baits, but the ratio of opossums to raccoons in this study did not affect rabies virus neutralizing antibody response of the raccoon populations.
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Pedersen K, Schmit BS, DeLiberto TJ, Suckow JR, Davis AJ, Slate D, Chipman RB, Hale RL, Gilbert AT. Raccoon ( Procyon lotor) biomarker and rabies antibody response to varying oral rabies vaccine bait densities in northwestern Pennsylvania. Heliyon 2018; 4:e00754. [PMID: 30211329 PMCID: PMC6129686 DOI: 10.1016/j.heliyon.2018.e00754] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Revised: 07/06/2018] [Accepted: 08/22/2018] [Indexed: 11/28/2022] Open
Abstract
Distribution of oral rabies vaccine baits has been used as a strategy for managing rabies in the United States since the 1990s. Since that time, efforts have been made to improve baiting strategies with a focus on bait density to maximize both efficiency and cost effectiveness. An optimal rabies management strategy includes a vaccine bait preferred by the target species that is distributed at the minimal density needed to achieve population immunity to prevent rabies spread. The purpose of our pilot study was to examine the effect of 75, 150, and 300 baits/km2 vaccine bait densities on rabies virus neutralizing antibody (RVNA) seroprevalence in raccoons (Procyon lotor). Raboral V-RG® fishmeal polymer baits (Merial Inc. (now a part of Boehringer Ingelheim), Athens, Georgia) contain a tetracycline biomarker that was used to estimate bait consumption as another measure of intervention impact. Our results suggest that raccoon RVNA response increases as bait density increases, but the effect may not be sufficient to justify the cost except in the case of contingency actions or an epizootic. Non-target species, especially opossums (Didelphis virginianus) in certain areas, should be considered when determining an appropriate bait density to ensure sufficient baits are available for consumption by the target species.
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Affiliation(s)
- Kerri Pedersen
- U.S. Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, National Wildlife Research Center, 4101 LaPorte Avenue, Fort Collins, CO 80521, USA
| | - Brandon S. Schmit
- U.S. Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, National Wildlife Research Center, 4101 LaPorte Avenue, Fort Collins, CO 80521, USA
| | - Thomas J. DeLiberto
- U.S. Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, National Wildlife Research Center, 4101 LaPorte Avenue, Fort Collins, CO 80521, USA
| | - Jason R. Suckow
- U.S. Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, 2150 Centre Avenue, Building B, Fort Collins, CO 80526, USA
| | - Amy J. Davis
- U.S. Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, National Wildlife Research Center, 4101 LaPorte Avenue, Fort Collins, CO 80521, USA
| | - Dennis Slate
- U.S. Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, National Rabies Management Program, 59 Chenell Drive, Suite 2, Concord, New Hampshire 03301, USA
| | - Richard B. Chipman
- U.S. Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, National Rabies Management Program, 59 Chenell Drive, Suite 2, Concord, New Hampshire 03301, USA
| | - Robert L. Hale
- U.S. Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, 1777 Stagecoach Court, Powell, Ohio 43065, USA
| | - Amy T. Gilbert
- U.S. Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, National Wildlife Research Center, 4101 LaPorte Avenue, Fort Collins, CO 80521, USA
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Abstract
In the US, rabies virus (RV) has been enzootic in raccoons ( Procyon lotor) since the late 1940s. Oral rabies vaccination (ORV) was implemented in the 1990s to halt the spread of raccoon RV and continues to be used as a wildlife management tool. Our objective was to evaluate a recombinant human adenovirus-rabies virus glycoprotein vaccine in northern New York, Vermont, and New Hampshire over a 3-yr period, using changes in RV neutralizing antibody (RVNA) seroprevalence in raccoon populations as an immunologic index of ORV impact. Vaccine baits were distributed at 75 baits/km2 and 750-m flight-line spacing in the study area. Animal sampling occurred during 10-d intervals pre- and post-ORV during 2012-14 within eight study cells: four northern cells had a history of ORV with a different vaccine for 3 or more years prior and four southern cells were ORV naive. Baseline raccoon RVNA seroprevalence was 27.3% ( n=1,079, 95% confidence interval [CI]: 24.8-30.1) before ORV in 2012. Raccoon RVNA seroprevalence averaged 68.5% ( n=1,551, 95% CI: 66.2-70.8) post-ORV during the 3-yr study. The RVNA seroprevalence levels in this study were considered to be adequate for stopping raccoon RV transmission and supported and expanded the results from a West Virginia field trial, as well as earlier evaluations along the Canada-US border.
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Fooks AR, Cliquet F, Finke S, Freuling C, Hemachudha T, Mani RS, Müller T, Nadin-Davis S, Picard-Meyer E, Wilde H, Banyard AC. Rabies. Nat Rev Dis Primers 2017; 3:17091. [PMID: 29188797 DOI: 10.1038/nrdp.2017.91] [Citation(s) in RCA: 194] [Impact Index Per Article: 27.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Rabies is a life-threatening neglected tropical disease: tens of thousands of cases are reported annually in endemic countries (mainly in Africa and Asia), although the actual numbers are most likely underestimated. Rabies is a zoonotic disease that is caused by infection with viruses of the Lyssavirus genus, which are transmitted via the saliva of an infected animal. Dogs are the most important reservoir for rabies viruses, and dog bites account for >99% of human cases. The virus first infects peripheral motor neurons, and symptoms occur after the virus reaches the central nervous system. Once clinical disease develops, it is almost certainly fatal. Primary prevention involves dog vaccination campaigns to reduce the virus reservoir. If exposure occurs, timely post-exposure prophylaxis can prevent the progression to clinical disease and involves appropriate wound care, the administration of rabies immunoglobulin and vaccination. A multifaceted approach for human rabies eradication that involves government support, disease awareness, vaccination of at-risk human populations and, most importantly, dog rabies control is necessary to achieve the WHO goal of reducing the number of cases of dog-mediated human rabies to zero by 2030.
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Affiliation(s)
- Anthony R Fooks
- Animal and Plant Health Agency (APHA), Wildlife Zoonoses and Vector Borne Diseases Research Group, (WHO Collaborating Centre for the Characterisation of Rabies and Rabies-Related Viruses, World Organisation for Animal Health (OIE) Reference Laboratory for Rabies), Weybridge, New Haw, Addlestone, Surrey KT15 3NB, UK.,Institute of Infection &Global Health, University of Liverpool, Liverpool, UK.,Institute for Infection and Immunity, St. George's Hospital Medical School, University of London, London, UK
| | - Florence Cliquet
- French Agency for Food, Environmental and Occupational Health &Safety (ANSES)-Nancy Laboratory for Rabies and Wildlife (European Union Reference Laboratory for Rabies, WHO Collaborating Centre for Research and Management in Zoonoses Control, OIE Reference Laboratory for Rabies, European Union Reference Institute for Rabies Serology), Technopôle Agricole et Vétérinaire de Pixérécourt, Malzéville, France
| | - Stefan Finke
- Institute of Molecular Virology and Cell Biology (WHO Collaborating Centre for Rabies Surveillance and Research, OIE Reference Laboratory for Rabies), Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Greifswald-Insel Riems, Germany
| | - Conrad Freuling
- Institute of Molecular Virology and Cell Biology (WHO Collaborating Centre for Rabies Surveillance and Research, OIE Reference Laboratory for Rabies), Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Greifswald-Insel Riems, Germany
| | - Thiravat Hemachudha
- Department of Medicine (Neurology) and (WHO Collaborating Centre for Research and Training on Viral Zoonoses), Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand.,Thai Red Cross Emerging Infectious Disease-Health Science Centre, Thai Red Cross Society, Bangkok, Thailand
| | - Reeta S Mani
- Department of Neurovirology (WHO Collaborating Centre for Reference and Research in Rabies), National Institute of Mental Health and Neurosciences (NIMHANS), Bangalore, India
| | - Thomas Müller
- Institute of Molecular Virology and Cell Biology (WHO Collaborating Centre for Rabies Surveillance and Research, OIE Reference Laboratory for Rabies), Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Greifswald-Insel Riems, Germany
| | - Susan Nadin-Davis
- Ottawa Laboratory Fallowfield, Canadian Food Inspection Agency (WHO Collaborating Centre for Control, Pathogenesis and Epidemiology of Rabies in Carnivores), Ottawa, Ontario, Canada
| | - Evelyne Picard-Meyer
- French Agency for Food, Environmental and Occupational Health &Safety (ANSES)-Nancy Laboratory for Rabies and Wildlife (European Union Reference Laboratory for Rabies, WHO Collaborating Centre for Research and Management in Zoonoses Control, OIE Reference Laboratory for Rabies, European Union Reference Institute for Rabies Serology), Technopôle Agricole et Vétérinaire de Pixérécourt, Malzéville, France
| | - Henry Wilde
- Department of Medicine (Neurology) and (WHO Collaborating Centre for Research and Training on Viral Zoonoses), Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
| | - Ashley C Banyard
- Animal and Plant Health Agency (APHA), Wildlife Zoonoses and Vector Borne Diseases Research Group, (WHO Collaborating Centre for the Characterisation of Rabies and Rabies-Related Viruses, World Organisation for Animal Health (OIE) Reference Laboratory for Rabies), Weybridge, New Haw, Addlestone, Surrey KT15 3NB, UK
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Correction: Management and modeling approaches for controlling raccoon rabies: The road to elimination. PLoS Negl Trop Dis 2017; 11:e0005579. [PMID: 28463964 PMCID: PMC5412993 DOI: 10.1371/journal.pntd.0005579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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