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Müller T, Wallace RM, Freuling CM. Rabies importation in dogs and reduction of waiting period - The fear for scientifically justified changes. Vaccine 2024; 42:1855-1859. [PMID: 37866997 DOI: 10.1016/j.vaccine.2023.08.077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 08/23/2023] [Accepted: 08/28/2023] [Indexed: 10/24/2023]
Affiliation(s)
- Thomas Müller
- Institute of Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Greifswald-Insel Riems, Germany; WOAH Reference Laboratory for Rabies, Germany.
| | - Ryan M Wallace
- Poxvirus and Rabies Branch, Division of High Consequence Pathogens and Pathology, National Center for Emerging and Zoonotic Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, GA, USA; WOAH Reference Laboratory for Rabies, USA
| | - Conrad M Freuling
- Institute of Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Greifswald-Insel Riems, Germany; WOAH Reference Laboratory for Rabies, Germany
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Robardet E, Zdravkova A, Ilieva D, Hakmann E, Georgopoulou I, Tasioudi K, Nokireki T, Isomursu M, Jankovic IL, Lojkic I, Serzants M, Zommere Z, Masiulis M, Jaceviciene I, Vuta V, Wasniewski M, Dilaveris D. Retrospective analysis of sero-prevalence and bait uptake estimations in foxes after oral rabies vaccination programmes at European level: Lessons learned and paths forward. Vet Microbiol 2024; 288:109917. [PMID: 38039917 DOI: 10.1016/j.vetmic.2023.109917] [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: 08/01/2023] [Revised: 11/09/2023] [Accepted: 11/17/2023] [Indexed: 12/03/2023]
Abstract
Rabies caused by the Classical Rabies Virus (Lyssavirus rabies abbreviated RABV) in the European Union has been close to elimination mainly thanks to Oral Rabies Vaccination (ORV) campaigns targeting wildlife (primarily red foxes). ORV programmes co-financed by the European Commission include a monitoring-component to assess the effectiveness of the ORV campaigns at national level. This assessment is performed by a random collection of red foxes in the vaccinated areas with control of antibodies presence by serological analysis and control of bait uptake by detection of biomarkers (tetracycline incorporated into the baits) in the bones and teeth. ORV programmes aim to a vaccine coverage high enough to immunize (ideally) 70 % of the reservoir population to control the spread of the disease. European Union (EU) programmes that led to almost elimination of rabies on the territory have been traditionally found to have a bait uptake average of 70 % (EU countries; 2010-2020 period) while the seroconversion data showed an average level of 40 % (EU countries; 2010-2020 period). To better understand variations of these indicators, a study was been set up to evaluate the impact of several variables (linked to the vaccination programme itself and linked to environmental conditions) on the bait uptake and the seroconversion rate. Thus, pooling data from several countries provides more powerful statistics and the highest probability of detecting trends. Results of this study advocate the use of a single serological test across the EU since data variation due to the type of test used was higher than variations due to field factors, making the interpretation of monitoring results at EU level challenging. In addition, the results indicates a negative correlation between bait uptake and maximum temperatures reached during ORV campaigns questioning the potential impact of climatic change and associated increase of temperatures on the ORV programmes efficiency. Several hypotheses requesting additional investigation are drawn and discussed in this paper.
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Affiliation(s)
- Emmanuelle Robardet
- Anses, Nancy Laboratory for Rabies and Wildlife, EURL for Rabies, Bâtiment H, Technopôle Agricole et Vétérinaire, CS 40 009, 54220 Malzéville Cedex, France.
| | - Anna Zdravkova
- Bulgarian Food Safety Agency, 15 Pencho Slaveykov Blvd., Sofia 1606, Bulgaria
| | - Darinka Ilieva
- National Diagnostic and Research Veterinary Institute, 15 Pencho Slaveykov Blvd., Sofia 1606, Bulgaria
| | - Enel Hakmann
- Veterinary and Food Board, Teaduse 2, Saku, Harjumaa 7550 Väike-Paala 3, Tallinn 11415, Estonia
| | - Ioanna Georgopoulou
- Department of Zoonoses, Animal Health Directorate, Directorate General of Veterinary Medicine, Ministry of Rural Development and Food, 46, Veranzerou str, PC 104 38 Athens, Greece
| | - Konstantia Tasioudi
- Department of Molecular Diagnostics, FMD, Virological, Ricketsial and Exotic diseases, Athens Veterinary Centre, Ministry of Rural Development and Food, 25, Neapoleos str, PC 15341, Agia Paraskevi, Athens, Greece
| | - Tiina Nokireki
- Finnish Food Authority, Mustialankatu 3, 00790 Helsinki, Finland; Finnish Food Authority, Elektroniikkatie 3, 90590 Oulu, Finland
| | - Marja Isomursu
- Finnish Food Authority, Mustialankatu 3, 00790 Helsinki, Finland; Finnish Food Authority, Elektroniikkatie 3, 90590 Oulu, Finland
| | - Ivana Lohman Jankovic
- Ministry of Agriculture, Veterinary and Food Safety Directorate, Savska cesta 143, 10000 Zagreb, Croatia
| | - Ivana Lojkic
- Croatian Veterinary Institute, Savska cesta 143, 10000 Zagreb, Croatia
| | - Martins Serzants
- Food and Veterinary Service, Peldu street 30, Riga LV-1050, Latvia
| | - Zanete Zommere
- Institute of Food Safety, Animal Health and Environment "BIOR", Lejupes iela 3, Riga LV-1076, Latvia
| | - Marius Masiulis
- State Food and Veterinary Service, Siesiku str., 19 07170 Vilnius, Lithuania
| | - Ingrida Jaceviciene
- National Food and Veterinary Risk Assessment Institute, J. Kairiukscio str. 10, LT-08409 Vilnius, Lithuania
| | - Vlad Vuta
- Institute for Diagnosis and Animal Health, str dr staicovici nr, 63, 050557 Bucharest, Romania
| | - Marine Wasniewski
- Anses, Nancy Laboratory for Rabies and Wildlife, EURL for Rabies, Bâtiment H, Technopôle Agricole et Vétérinaire, CS 40 009, 54220 Malzéville Cedex, France
| | - Dimitrios Dilaveris
- European Commission, Directorate-General for Health and Food Safety, B-1049 Brussels, Belgium
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Alvarez J, Nielsen SS, Robardet E, Stegeman A, Van Gucht S, Vuta V, Antoniou SE, Aznar I, Papanikolaou A, Roberts HC. Risks related to a possible reduction of the waiting period for dogs after rabies antibody titration to 30 days compared with 90 days of the current EU legislative regime. EFSA J 2022; 20:e07350. [PMID: 35662806 PMCID: PMC9161159 DOI: 10.2903/j.efsa.2022.7350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
EFSA received a mandate from the European Commission to assess the risks related to a possible reduction of the waiting period after rabies antibody titration test to 30 days compared with 90 days of the current EU legislation, for dogs moving from certain non-EU countries to the EU. This Scientific Report assessed the probability of introduction of rabies into the EU through commercial and non-commercial movements of vaccinated dogs with a positive titration test (≥ 0.5 IU/mL) if the waiting period decreases from 90 to 30 days. Assuming that all the legal requirements are complied with, the risk of transmission of rabies through the movement of a vaccinated dog is related to the risk of introducing an animal incubating rabies that was infected before the day of vaccination or shortly after vaccination but before the development of immunity (21 days post-vaccination). Using published data on the incubation period for experimental and field cases in dogs and considering the rabies incidence data in certain countries, the aggregated probability for the annual introduction of rabies through dogs was assessed. Considering the uncertainty related to the duration of the incubation period, the number of imported dogs, and the disease incidence in some countries it was concluded with a 95% certainty that the maximum number of rabies-infected imported dogs complying with the regulations in a 20-year period could increase from 5 to 20 when decreasing the waiting period from 90 to 30 days. Nevertheless, the potential impact of even a small increase in probability means the risk is increased for a region like the EU where rabies has long been a focus for eradication, to protect human and animal health.
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Yale G, Sudarshan S, Taj S, Patchimuthu GI, Mangalanathan BV, Belludi AY, Shampur MN, Krishnaswamy TG, Mazeri S. Investigation of protective level of rabies antibodies in vaccinated dogs in Chennai, India. Vet Rec Open 2021; 8:e8. [PMID: 33981442 PMCID: PMC8110021 DOI: 10.1002/vro2.8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 02/05/2021] [Accepted: 02/22/2021] [Indexed: 12/02/2022] Open
Abstract
BACKGROUND Rabies is still endemic in India causing an estimated 20,000 human deaths a year. Free roaming dogs and unvaccinated owned dogs play a major role in the maintenance of the disease. Dog vaccination is the most crucial aspect of rabies prevention and control strategies; therefore vaccine immunogenicity and longevity are important determinants of the efficiency of rabies control efforts. METHODS In this study at Madras Veterinary College, India, a total of 297 serum samples were collected from owned dogs that were vaccinated against rabies. Data regarding age, gender, breed, neuter status and last date of vaccination were collected at the time of blood collection. The level of rabies virus neutralising antibodies in the sera of these dogs was measured through rapid focus fluorescence inhibition test. The factors associated with protective level of rabies antibodies in vaccinated dogs were investigated through multivariable regression analysis. RESULTS This cross-sectional investigation shows that only 40% (119/297) of the all the dogs in the study showed presence of protective level of anti-rabies antibodies, and 40% (72/180) of the dogs vaccinated within the last year showed presence of protective levels of antibodies causing concern about rabies vaccine quality and its impact on rabies control. The study also shows that older and neutered dogs are more likely to have protective titre among vaccinated dogs, while non-descript breed dogs are less likely to have a protective titre compared to pure breeds. CONCLUSION In this study 60% (108/180) of young prima dogs and adult dogs did not show protective levels of antibodies within the year of last rabies vaccination, although they had previous vaccination history. This high percentage of apparent non-responders is a cause of concern of administration, distribution, storage, potency and quality management of vaccines in India.
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Affiliation(s)
- Gowri Yale
- Mission RabiesVeterinary Hospital ComplexPanajiGoaIndia
| | - Sampada Sudarshan
- Department of NeurovirologyNational Institute of Mental Health and NeurosciencesBangaloreKarnatakaIndia
| | - Shaheen Taj
- Department of NeurovirologyNational Institute of Mental Health and NeurosciencesBangaloreKarnatakaIndia
| | | | - Bharathi Vijaya Mangalanathan
- Department of Veterinary Preventive MedicineMadras Veterinary CollegeTamil Nadu Veterinary and Animal Sciences UniversityChennaiTamil NaduIndia
| | - Ashwin Yajaman Belludi
- Department of NeurovirologyNational Institute of Mental Health and NeurosciencesBangaloreKarnatakaIndia
| | | | - Tirumurugaan Gopalan Krishnaswamy
- Zoonoses Research LaboratoryCentre for Animal Health StudiesTamil Nadu Veterinary and Animal Sciences UniversityChennaiTamil NaduIndia
| | - Stella Mazeri
- Division of Genetics and GenomicsThe Roslin Institute and The Royal (Dick) School of Veterinary StudiesThe University of Edinburgh, MidlothianUK
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Tasioudi KE, Papatheodorou D, Iliadou P, Kostoulas P, Gianniou M, Chondrokouki E, Mangana-Vougiouka O, Mylonakis ME. Factors influencing the outcome of primary immunization against rabies in young dogs. Vet Microbiol 2018; 213:1-4. [PMID: 29291991 DOI: 10.1016/j.vetmic.2017.11.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2017] [Revised: 11/04/2017] [Accepted: 11/06/2017] [Indexed: 10/18/2022]
Abstract
There is currently limited information on the factors influencing the outcome of rabies vaccination in dogs based on the primary immunization schedule. The objective of this study was to investigate whether selected variables (signalment, number of vaccinations, vaccine brand and multivalence, and time interval between the most recent vaccination and blood sampling) were associated with the achievement of an acceptable titer threshold (based on international standards) and with absolute antibody titers in young dogs vaccinated with commercially available vaccines. Serologic data from 662 dogs tested prior to their first annual booster for rabies were retrospectively reviewed. Neutralizing antibody titers were determined using a fluorescent antibody neutralization test. An acceptable titer threshold (≥0.5IU/ml) was achieved in 86.5% of the dogs. Dogs that had been vaccinated twice had significantly (P<0.001) higher antibody titers compared with dogs vaccinated once. The odds of achieving seropositivity and the median absolute antibody titer tended to decrease with increasing time between vaccination and blood sampling. Dogs vaccinated with monovalent vaccines were more likely to achieve an acceptable titer than dogs vaccinated with polyvalent vaccines. Dogs that were vaccinated after 3-6 months of age were more likely to develop higher antibody titers. These results indicate that the administration of two vaccines rather than one vaccine in the primary immunization schedule for rabies, result in a superior vaccination response and may be a more beneficial policy for ensuring pre-exposure prophylaxis and for travel certification of young dogs.
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Affiliation(s)
- Konstantia E Tasioudi
- National Reference Laboratory for Rabies in Animals, Department of Molecular Diagnostics, FMD, Virological, Rickettsial & Exotic Diseases, Athens Veterinary Center, Ministry of Rural Development and Food, Athens, Greece.
| | - Dimos Papatheodorou
- National Reference Laboratory for Rabies in Animals, Department of Molecular Diagnostics, FMD, Virological, Rickettsial & Exotic Diseases, Athens Veterinary Center, Ministry of Rural Development and Food, Athens, Greece
| | - Peristera Iliadou
- National Reference Laboratory for Rabies in Animals, Department of Molecular Diagnostics, FMD, Virological, Rickettsial & Exotic Diseases, Athens Veterinary Center, Ministry of Rural Development and Food, Athens, Greece
| | - Polychronis Kostoulas
- Laboratory of Epidemiology, Biostatistics and Animal Health Economics, School of Veterinary Sciences, Faculty of Health Science, University of Thessaly, Karditsa, Greece
| | - Maria Gianniou
- Department of Imports, Exports and Intraunion Trade of Live Animals and Products of Animal Origin, Animal Health Directorate, Ministry of Rural Development and Food, Athens, Greece
| | - Eleni Chondrokouki
- National Reference Laboratory for Rabies in Animals, Department of Molecular Diagnostics, FMD, Virological, Rickettsial & Exotic Diseases, Athens Veterinary Center, Ministry of Rural Development and Food, Athens, Greece
| | - Olga Mangana-Vougiouka
- National Reference Laboratory for Rabies in Animals, Department of Molecular Diagnostics, FMD, Virological, Rickettsial & Exotic Diseases, Athens Veterinary Center, Ministry of Rural Development and Food, Athens, Greece
| | - Mathios E Mylonakis
- Companion Animal Clinic, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
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Evaluation of the efficacy of the Japanese rabies RC-HL strain vaccine in domestic dogs using past and present data: Prediction based on logistic regression and meta-analysis. Prev Vet Med 2017; 147:172-177. [PMID: 29254717 DOI: 10.1016/j.prevetmed.2017.09.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2017] [Revised: 09/15/2017] [Accepted: 09/15/2017] [Indexed: 11/20/2022]
Abstract
Japan is one of the few rabies-free countries or territories (under the OIE standard) which still implement the policy of mandatory vaccination of domestic dogs. Under the Rabies Prevention Law enacted since 1950, pet owners in Japan are obliged to vaccinate their dogs every year. However, the national vaccination rate is estimated to average 42% over the past decade. Given this low owner compliance, there is debate over whether or not the mandatory vaccination policy should be maintained and if it were to be maintained, whether the yearly booster requirement is necessary or not. Data on 144 companion dogs vaccinated with the Japanese rabies RC-HL strain vaccine were analysed using multiple logistic regression. An extensive literature review was conducted and five previous vaccination studies were selected for meta-analysis. Results of logistic regression indicate that the proportion of dogs having a satisfactory antibody level lasting for 12 months (P_protected12) with only one vaccination was 74.7% (95% prediction interval (PI): 51.4%-90.5%). By contrast, P_protected12 for dogs vaccinated 2-4 times and 5 times or more was estimated as 96.6% (95%PI: 83.1%-99.3%) and 98.7% (95%PI: 96.9%-99.6%), respectively. Moreover, P_protected for 36 months would drop to 33.4% (95%PI: 11.4%-71.6%) for dogs vaccinated only once, while it would be 83.0% (95% PI: 39.4%-97.1%) and 93.0% (95%PI: 59.7%-99.2%) for dogs vaccinated 2-4 times and 5 times or more, respectively. The pooled P_protected for at least 12 months from meta-analysis was estimated as 83.8% (95%CI: 66.1%-97.5%) for dogs vaccinated only once, while it was estimated as 94.7% (95%CI: 87.7%-99.1%) for dogs vaccinated at least twice. Therefore, the yearly booster requirement of the current mandatory vaccination policy in Japan is reasonable in terms of its frequency. However, there is potential for future policy amendment to one that requires less frequent boosters, i.e. a booster is required within one year after primary vaccination and then every two to three years.
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Overexpression of Interleukin-7 Extends the Humoral Immune Response Induced by Rabies Vaccination. J Virol 2017; 91:JVI.02324-16. [PMID: 28100620 DOI: 10.1128/jvi.02324-16] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2016] [Accepted: 01/11/2017] [Indexed: 12/14/2022] Open
Abstract
Rabies continues to present a public health threat in most countries of the world. The most efficient way to prevent and control rabies is to implement vaccination programs for domestic animals. However, traditional inactivated vaccines used in animals are costly and have relatively low efficiency, which impedes their extensive use in developing countries. There is, therefore, an urgent need to develop single-dose and long-lasting rabies vaccines. However, little information is available regarding the mechanisms underlying immunological memory, which can broaden humoral responses following rabies vaccination. In this study, a recombinant rabies virus (RABV) that expressed murine interleukin-7 (IL-7), referred to here as rLBNSE-IL-7, was constructed, and its effectiveness was evaluated in a mouse model. rLBNSE-IL-7 induced higher rates of T follicular helper (Tfh) cells and germinal center (GC) B cells from draining lymph nodes (LNs) than the parent virus rLBNSE. Interestingly, rLBNSE-IL-7 improved the percentages of long-lived memory B cells (Bmem) in the draining LNs and plasma cells (PCs) in the bone marrow (BM) for up to 360 days postimmunization (dpi). As a result of the presence of the long-lived PCs, it also generated prolonged virus-neutralizing antibodies (VNAs), resulting in better protection against a lethal challenge than that seen with rLBNSE. Moreover, consistent with the increased numbers of Bmem and PCs after a boost with rLBNSE, rLBNSE-IL-7-immunized mice promptly produced a more potent secondary anti-RABV neutralizing antibody response than rLBNSE-immunized mice. Overall, our data suggest that overexpressing IL-7 improved the induction of long-lasting primary and secondary antibody responses post-RABV immunization.IMPORTANCE Extending humoral immune responses using adjuvants is an important method to develop long-lasting and efficient vaccines against rabies. However, little information is currently available regarding prolonged immunological memory post-RABV vaccination. In this study, a novel rabies vaccine that expressed murine IL-7 was developed. This vaccine enhanced the numbers of Tfh cells and the GC responses, resulting in upregulated quantities of Bmem and PCs. Moreover, we found that the long-lived PCs that were elicited by the IL-7-expressing recombinant virus (rLBNSE-IL-7) were able to sustain VNA levels much longer than those elicited by the parent rLBNSE virus. Upon reexposure to the pathogen, the longevous Bmem, which maintained higher numbers for up to 360 dpi with rLBNSE-IL-7 compared to rLBNSE, could differentiate into antibody-secreting cells, resulting in rapid and potent secondary production of VNAs. These results suggest that the expression of IL-7 is beneficial for induction of potent and long-lasting humoral immune responses.
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Lee M, Reed A, Estill C, Izume S, Dong J, Jin L. Evaluation of BHV-1 antibody titer in a cattle herd against different BHV-1 strains. Vet Microbiol 2015; 179:228-32. [PMID: 26123370 DOI: 10.1016/j.vetmic.2015.06.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2015] [Revised: 06/08/2015] [Accepted: 06/11/2015] [Indexed: 11/17/2022]
Abstract
Although modified-live multivalent vaccines, such as PregGuard GOLD and Bovi-Shield Gold, have been used routinely in both beef and dairy cattle in the US, abortion and respiratory diseases still occasionally occur following vaccination. To determine whether the antibody induced by the multivalent vaccine can recognize BHV-1 isolates from aborted animals, BHV-1 antibody titer was evaluated with two isolates from abortion cases and two vaccine BHV-1 viruses. Cattle serum was collected from a dairy herd that was vaccinated annually with Bovi-Shield Gold 5 vaccine. Among the 28 cattle tested, no statistical significant difference in serum neutralization titer was observed when test virus was either vaccine virus or clinical isolates. It suggests that the BHV-1 antibody from the vaccinated cattle can recognize both the vaccine virus and clinical isolates. However, it is noticed that cows at 5 years old or older had a significantly lower BHV-1 antibody titer on average than the average of SN titer in 3 year-old cows. Similarly, cows at 5 years or older had a significantly lower BVDV antibody titer than cows at about 2 years of age. In addition, cattle vaccinated within 0-2 months had a significantly higher BHV-1 titer than those that received vaccination 6 months or greater prior to titer measurement. In contrast, cattle that received a vaccination 6 months prior had a significantly higher anti-BVDV antibody titer than those vaccinated within 1-2 months. The BVDV antibody titers remained relatively unchanged between 6 months and 1 year post-vaccination. Our study suggests little antigenic variation exists between BHV-1 disease isolates and BHV-1 of the multivalent vaccines. In addition, BHV-1 antibody titer is relatively lower at 6 months post vaccination in those tested animals. However, the BVDV antibody titer remained relatively high after 6 months from time of vaccination.
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Affiliation(s)
- Megan Lee
- Department of Biomedical Sciences, College of Veterinary Medicine, Oregon State University, Corvallis, OR 97331, United States
| | - Aimee Reed
- Department of Biomedical Sciences, College of Veterinary Medicine, Oregon State University, Corvallis, OR 97331, United States
| | - Charles Estill
- Department of Clinical Sciences, College of Veterinary Medicine, Oregon State University, Corvallis, OR 97331, United States
| | - Satoko Izume
- Department of Biomedical Sciences, College of Veterinary Medicine, Oregon State University, Corvallis, OR 97331, United States
| | - Jing Dong
- Department of Biomedical Sciences, College of Veterinary Medicine, Oregon State University, Corvallis, OR 97331, United States
| | - Ling Jin
- Department of Biomedical Sciences, College of Veterinary Medicine, Oregon State University, Corvallis, OR 97331, United States; Department of Microbiology, College of Science, Oregon State University, Corvallis, OR 97331, United States.
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