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Hananeh WM, Momani WMA, Ababneh MM, Abutarbush SM. Mycoplasma bovis arthritis and pneumonia in calves in Jordan: An emerging disease. Vet World 2019; 11:1663-1668. [PMID: 30774255 PMCID: PMC6362338 DOI: 10.14202/vetworld.2018.1663-1668] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Accepted: 10/25/2018] [Indexed: 01/04/2023] Open
Abstract
Aim: Clinical, microbiological, molecular, and pathological assays were undertaken to characterize an outbreak of increasingly reported signs of unresponsive arthritis and pneumonia of Mycoplasma bovis infection in young calves in Jordan. Materials and Methods: Clinical history of the affected bovine herd was investigated for the presence of respiratory and/or joint problems. Two calves with such history were clinically examined and necropsied. Representative tissues were sent for microbiological, molecular, and pathological examinations for M. bovis infection. Results: The outbreak started in a herd of 220 nursing calves, 2 months before the receiving of two calves for postmortem examination. Clinically, respiratory signs and infection of one or more joints dominated in the affected calves. The morbidity and case fatality rates were 27.27% and 61.7%, respectively. The left carpal joint was markedly swollen in both calves and exhibited necrofibrinous to granulomatous arthritis in varying degrees of severity. The anteroventral lung lobes in both calves were consistently affected and revealed multifocal to coalescing severe necrogranulomatous and fibrinopurulent bronchopneumonia. Microbiological and molecular findings confirmed the pathological examination. Furthermore, bovine viral diarrhea (BVD) was diagnosed in one calf by histopathology and polymerase chain reaction. Conclusion: This investigation reports the first outbreak of M. bovis infection in calves located in Jordan that could occur concurrently with BVD.
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Affiliation(s)
- Wael M Hananeh
- Department of Veterinary Pathology and Public Health, Faculty of Veterinary Medicine, Jordan University of Science and Technology, P.O. Box, 3030, Irbid 22110, Jordan
| | - Waleed M Al Momani
- Department of Basic Medical Sciences, Faculty of Medicine, Yarmouk University, Irbid, Jordan
| | - Mustafa M Ababneh
- Department of Basic Veterinary Medical Sciences, Faculty of Veterinary Medicine, Jordan University of Science and Technology, P.O. Box 3030, Irbid 22110, Jordan
| | - Sameeh M Abutarbush
- Department of Veterinary Clinical Sciences, Faculty of Veterinary Medicine, Jordan University of Science and Technology, Irbid 22110, Jordan
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2
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Walz PH, Riddell KP, Newcomer BW, Neill JD, Falkenberg SM, Cortese VS, Scruggs DW, Short TH. Comparison of reproductive protection against bovine viral diarrhea virus provided by multivalent viral vaccines containing inactivated fractions of bovine viral diarrhea virus 1 and 2. Vaccine 2018; 36:3853-3860. [PMID: 29699786 DOI: 10.1016/j.vaccine.2018.04.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2017] [Revised: 03/28/2018] [Accepted: 04/03/2018] [Indexed: 11/26/2022]
Abstract
Bovine viral diarrhea virus (BVDV) is an important viral cause of reproductive disease, immune suppression and clinical disease in cattle. The objective of this study was to compare reproductive protection in cattle against the impacts of bovine viral diarrhea virus (BVDV) provided by three different multivalent vaccines containing inactivated BVDV. BVDV negative beef heifers and cows (n = 122) were randomly assigned to one of four groups. Groups A-C (n = 34/group) received two pre-breeding doses of one of three commercially available multivalent vaccines containing inactivated fractions of BVDV 1 and BVDV 2, and Group D (n = 20) served as negative control and received two doses of saline prior to breeding. Animals were bred, and following pregnancy diagnosis, 110 cattle [Group A (n = 31); Group B (n = 32); Group C (n = 31); Group D (n = 16)] were subjected to a 28-day exposure to cattle persistently infected (PI) with BVDV (1a, 1b and 2a). Of the 110 pregnancies, 6 pregnancies resulted in fetal resorption with no material for testing. From the resultant 104 pregnancies, BVDV transplacental infections were demonstrated in 73 pregnancies. The BVDV fetal infection rate (FI) was calculated at 13/30 (43%) for Group A cows, 27/29 (93%) for Group B cows, 18/30 (60%) for Group C cows, and 15/15 (100%) for Group D cows. Statistical differences were observed between groups with respect to post-vaccination antibody titers, presence and duration of viremia in pregnant cattle, and fetal infection rates in offspring from BVDV-exposed cows. Group A vaccination resulted in significant protection against BVDV infection as compared to all other groups based upon outcome measurements, while Group B vaccination did not differ in protection against BVDV infection from control Group D. Ability of inactivated BVDV vaccines to provide protection against BVDV fetal infection varies significantly among commercially available products; however, in this challenge model, the inactivated vaccines provided unacceptable levels of BVDV FI protection.
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Affiliation(s)
- Paul H Walz
- College of Veterinary Medicine, Auburn University, Auburn, AL 36849, USA
| | - Kay P Riddell
- College of Veterinary Medicine, Auburn University, Auburn, AL 36849, USA
| | | | - John D Neill
- USDA, Agricultural Research Service, National Animal Disease Center, Ruminant Diseases and Immunology Research Unit, Ames, IA 50010, USA
| | - Shollie M Falkenberg
- USDA, Agricultural Research Service, National Animal Disease Center, Ruminant Diseases and Immunology Research Unit, Ames, IA 50010, USA
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3
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Evaluation of reproductive protection against bovine viral diarrhea virus and bovine herpesvirus-1 afforded by annual revaccination with modified-live viral or combination modified-live/killed viral vaccines after primary vaccination with modified-live viral vaccine. Vaccine 2017; 35:1046-1054. [PMID: 28111144 DOI: 10.1016/j.vaccine.2017.01.006] [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: 09/07/2016] [Revised: 01/03/2017] [Accepted: 01/04/2017] [Indexed: 11/23/2022]
Abstract
The objective of this study was to compare reproductive protection in cattle against bovine viral diarrhea virus (BVDV) and bovine herpesvirus 1 (BoHV-1) provided by annual revaccination with multivalent modified-live viral (MLV) vaccine or multivalent combination viral (CV) vaccine containing temperature-sensitive modified-live BoHV-1 and killed BVDV when MLV vaccines were given pre-breeding to nulliparous heifers. Seventy-five beef heifers were allocated into treatment groups A (n=30; two MLV doses pre-breeding, annual revaccination with MLV vaccine), B (n=30; two MLV doses pre-breeding, annual revaccination with CV vaccine) and C (n=15; saline in lieu of vaccine). Heifers were administered treatments on days 0 (weaning), 183 (pre-breeding), 366 (first gestation), and 738 (second gestation). After first calving, primiparous cows were bred, with pregnancy assessment on day 715. At that time, 24 group A heifers (23 pregnancies), 23 group B heifers (22 pregnancies), and 15 group C heifers (15 pregnancies) were commingled with six persistently infected (PI) cattle for 16days. Ninety-nine days after PI removal, cows were intravenously inoculated with BoHV-1. All fetuses and live offspring were assessed for BVDV and BoHV-1. Abortions occurred in 3/23 group A cows, 1/22 group B cows, and 11/15 group C cows. Fetal infection with BVDV or BoHV-1 occurred in 4/23 group A offspring, 0/22 group B offspring, and 15/15 group C offspring. This research demonstrates efficacy of administering two pre-breeding doses of MLV vaccine with annual revaccination using CV vaccine to prevent fetal loss due to exposure to BVDV and BoHV-1.
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4
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Passler T, Riddell KP, Edmondson MA, Chamorro MF, Neill JD, Brodersen BW, Walz HL, Galik PK, Zhang Y, Walz PH. Experimental infection of pregnant goats with bovine viral diarrhea virus (BVDV) 1 or 2. Vet Res 2014; 45:38. [PMID: 24708266 PMCID: PMC3994200 DOI: 10.1186/1297-9716-45-38] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2013] [Accepted: 03/11/2014] [Indexed: 12/15/2022] Open
Abstract
Infections with bovine viral diarrhea virus (BVDV) of the genus pestivirus, family Flaviviridae, are not limited to cattle but occur in various artiodactyls. Persistently infected (PI) cattle are the main source of BVDV. Persistent infections also occur in heterologous hosts such as sheep and deer. BVDV infections of goats commonly result in reproductive disease, but viable PI goats are rare. Using 2 BVDV isolates, previously demonstrated to cause PI cattle and white-tailed deer, this study evaluated the outcome of experimental infection of pregnant goats. Pregnant goats (5 goats/group) were intranasally inoculated with BVDV 1b AU526 (group 1) or BVDV 2 PA131 (group 2) at approximately 25-35 days of gestation. The outcome of infection varied considerably between groups. In group 1, only 3 does became viremic, and 1 doe gave birth to a stillborn fetus and a viable PI kid, which appeared healthy and shed BVDV continuously. In group 2, all does became viremic, 4/5 does aborted, and 1 doe gave birth to a non-viable PI kid. Immunohistochemistry demonstrated BVDV antigen in tissues of evaluated fetuses, with similar distribution but reduced intensity as compared to cattle. The genetic sequence of inoculated viruses was compared to those from PI kids and their dam. Most nucleotide changes in group 1 were present during the dam's acute infection. In group 2, a similar number of mutations resulted from fetal infection as from maternal acute infection. Results demonstrated that BVDV may cause reproductive disease but may also be maintained in goats.
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Affiliation(s)
- Thomas Passler
- College of Veterinary Medicine, Departments of Clinical Sciences and Pathobiology, Auburn University, Auburn, AL 36849, USA.
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5
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Gard JA, Stringfellow DA. Shaping the norms that regulate international commerce of embryos. Theriogenology 2014; 81:56-66. [PMID: 24274410 DOI: 10.1016/j.theriogenology.2013.08.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2013] [Revised: 08/12/2013] [Accepted: 08/14/2013] [Indexed: 10/26/2022]
Abstract
As various embryo technologies in livestock were developed and evolved to a state of usefulness over the past 40 years, scientists with a specific interest in infectious diseases sought to determine the epidemiologic consequences of movement, especially international movement, of increasing numbers of embryos. Many of the foundational studies in this area were reported in Theriogenology, beginning in the 1970s and especially throughout the 1980s and 1990s. Unquestionably, Theriogenology has been a widely used venue for dissemination of basic information on this subject, which ultimately led to the development of the now universally accepted techniques for certification of embryo health. Today it is well-recognized that movement in commerce of embryos, especially in vivo-derived embryos, is a very low-risk method for exchange of animal germ plasm. This paper chronicles the evolution of strategies for health certification of embryos. An overview is provided of the calculated efforts of practitioners, scientists, and regulators to organize, forge necessary partnerships, stimulate needed research, provide purposeful analysis of the results, and, through these processes, guarantee the universal acceptance of efficient protocols for certifying the health of embryos intended for movement in international commerce.
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Affiliation(s)
- Julie A Gard
- Department of Clinical Sciences, College of Veterinary Medicine, Auburn University, Auburn, Alabama, USA.
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6
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Lalonde A, Bielanski A. Efficacy of the International Embryo Transfer Society (IETS) washing procedure for rendering oocytes matured in vitro free of bovine viral diarrhea virus (BVDV). Theriogenology 2011; 76:261-6. [DOI: 10.1016/j.theriogenology.2011.02.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2010] [Revised: 12/22/2010] [Accepted: 02/01/2011] [Indexed: 11/28/2022]
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7
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Passler T, Ditchkoff SS, Givens MD, Brock KV, DeYoung RW, Walz PH. Transmission of bovine viral diarrhea virus among white-tailed deer (Odocoileus virginianus). Vet Res 2009; 41:20. [PMID: 19922743 PMCID: PMC2797653 DOI: 10.1051/vetres/2009068] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2009] [Accepted: 11/17/2009] [Indexed: 11/14/2022] Open
Abstract
Cattle persistently infected (PI) with bovine viral diarrhea virus (BVDV), a pestivirus in the family Flaviviridae, are an important source of viral transmission to susceptible hosts. Persistent BVDV infections have been identified in white-tailed deer (Odocoileus virginianus), the most abundant free-ranging ruminant in North America. As PI deer shed BVDV similarly to PI cattle, maintenance of BVDV within white-tailed deer populations may be possible. To date, intraspecific transmission of BVDV in white-tailed deer has not been evaluated, which prompted this study. Six pregnant white-tailed deer were captured in the first trimester of pregnancy and cohabitated with a PI white-tailed deer. Cohabitation with the PI deer resulted in BVDV infection in all does, as indicated by seroconversion. All does gave birth to live fawns and no reproductive losses were observed. At birth, evidence of BVDV infection was identified in two singlet fawns, of which one was determined to be PI by repeated serum reverse transcription nested PCR, whole blood virus isolation and immunohistochemistry. This study demonstrates for the first time that BVDV transmission may occur among white-tailed deer. The birth of a PI fawn through contact to a PI white-tailed deer indicates that under appropriate circumstances, BVDV may be maintained in white-tailed deer by congenital infection.
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Affiliation(s)
- Thomas Passler
- College of Veterinary Medicine, JT Vaughan Large Animal Teaching Hospital, Auburn University, Auburn, AL 36849, USA
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8
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Givens MD, Riddell KP, Edmondson MA, Walz PH, Gard JA, Zhang Y, Galik PK, Brodersen BW, Carson RL, Stringfellow DA. Epidemiology of prolonged testicular infections with bovine viral diarrhea virus. Vet Microbiol 2009; 139:42-51. [DOI: 10.1016/j.vetmic.2009.04.029] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2008] [Revised: 04/16/2009] [Accepted: 04/28/2009] [Indexed: 10/20/2022]
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Gard J, Givens M, Marley M, Galik P, Riddell K, Stringfellow D, Zhang Y, Edmondson M. Bovine viral diarrhea virus (BVDV) associated with single in vivo-derived and in vitro-produced preimplantation bovine embryos following artificial exposure. Theriogenology 2009; 71:1238-44. [DOI: 10.1016/j.theriogenology.2009.01.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2008] [Revised: 12/31/2008] [Accepted: 01/02/2009] [Indexed: 11/15/2022]
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10
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Bielanski A, Algire J, Lalonde A, Nadin-Davis S. Transmission of bovine viral diarrhea virus (BVDV) via in vitro-fertilized embryos to recipients, but not to their offspring. Theriogenology 2008; 71:499-508. [PMID: 18834622 DOI: 10.1016/j.theriogenology.2008.08.015] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2008] [Revised: 08/20/2008] [Accepted: 08/25/2008] [Indexed: 10/21/2022]
Abstract
The objective was to assess the potential of Day-7, IVP zona pellucida-intact blastocysts to transmit bovine viral diarrhea virus (BVDV) to embryo recipients. Embryos were exposed (1h) to two non-cytopathic (NCP) biotypes, either NY-1 (type 1) or two concentrations of PA-131 (type 2), washed 10 times, and transferred into recipients (two embryos/recipient) free of BVDV and its antibody. Six (30.0%) of the 20 pregnancies were lost after 30 d following transfer of the embryos exposed to the type 1 strain; none of the recipients or their 18 full term offspring seroconverted. Conversely, following exposure to the type 2 strain, 16 (51.6%) of the 31 pregnancies were lost >30 d after embryo transfer. Furthermore, 18 (51.4%) of 35 recipients receiving embryos exposed to type 2 seroconverted; 11 of those were pregnant at 30 d, but only 2 went to full term and gave birth to noninfected (seronegative) calves. Virus isolation tests were performed on single, virus-exposed, washed embryos (not transferred); 3 of 12 (25%) and 17 of 61 (28%) exposed to type 1 and type 2, respectively, were positive for live BVDV. Embryos exposed to type 2 virus had from 0 to 34 viral copies. In conclusion, a large proportion of recipients that received embryos exposed to BVDV, especially those exposed to a high concentration of type 2 virus, became infected after ET, and their pregnancies failed. However, term pregnancies resulted in calves free of both virus and antibody. Therefore, additional disinfection procedures are recommended prior to transferring potentially infected IVP embryos.
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Affiliation(s)
- A Bielanski
- Canadian Food Inspection, Animal Diseases Research Institute, Ottawa, ON, Canada.
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11
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Smith RL, Sanderson MW, Walz PH, Givens MD. Sensitivity of Polymerase Chain Reaction for Detection of Bovine Viral Diarrhea Virus in Pooled Serum Samples and Use of Pooled Polymerase Chain Reaction to Determine Prevalence of Bovine Viral Diarrhea Virus in Auction Market Cattle. J Vet Diagn Invest 2008; 20:75-8. [DOI: 10.1177/104063870802000115] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Two reverse transcription-nested polymerase chain reaction tests, 1 quantitative (qRT-nPCR) and 1 standard (RT-nPCR), were evaluated to assess sensitivity for detection of bovine viral diarrhea virus (BVDV) of a single positive serum sample in a pool of 30. The RT-nPCR and qRT-nPCR each detected 95 of 100 known positives. The RT-nPCR was used to estimate the prevalence of BVDV in adult beef cows. Serum samples were obtained from the US Department of Agriculture brucellosis testing laboratories in 3 Midwestern states. Samples originated from auction markets and private treaty sales throughout the 3 states. A total of 2,990 serum samples were collected and randomly pooled into 100 pools for testing. Two of the 100 pools of field samples were positive, and each positive pool had a single positive individual sample upon confirmation. The estimate of BVDV prevalence in adult cows in this study was 0.07%. This study estimates the diagnostic sensitivity of RT-nPCR for BVDV and confirms that it is a useful diagnostic tool for pools of 30 serum samples and that prevalence of BVDV in adult cattle from auction markets is low.
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Affiliation(s)
- Rebecca L. Smith
- From the Department of Clinical Sciences, College of Veterinary Medicine, Kansas State University, Manhattan, KS
| | - Michael W. Sanderson
- From the Department of Clinical Sciences, College of Veterinary Medicine, Kansas State University, Manhattan, KS
| | - Paul H. Walz
- and the Department of Pathobiology, College of Veterinary Medicine, Auburn University, Auburn,
| | - M. Daniel Givens
- and the Department of Pathobiology, College of Veterinary Medicine, Auburn University, Auburn,
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12
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Gard JA, Givens MD, Riddell KP, Galik PK, Zhang Y, Stringfellow DA, Marley MSD. Detection of bovine viral diarrhea virus (BVDV) in single or small groups of preimplantation bovine embryos. Theriogenology 2007; 67:1415-23. [PMID: 17420041 DOI: 10.1016/j.theriogenology.2007.01.014] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2006] [Accepted: 01/12/2007] [Indexed: 11/15/2022]
Abstract
The objectives of this study were to develop techniques to detect BVDV associated with single or small groups of bovine embryos contained in small aliquots of medium using either virus isolation (VI) or real time quantitative polymerase chain reaction (RT-QPCR) assays. In vivo-derived and in vitro-produced bovine embryos at 7 d post-fertilization were exposed to SD-1, a high affinity strain of BVDV, for 2 h and then processed according to the International Embryo Transfer Society (IETS) guidelines prior to testing. Groups of five or two in vivo-derived embryos, and single in vivo-derived embryos, were VI positive for BVDV 100, 50, and 33% of the time, and were RT-QPCR positive 100, 75, and 42% of the time, respectively. The virus was detected by the VI technique in all of the groups of five or two in vitro-produced embryos and in all of the single in vitro-produced embryos, and it was detected in 100, 80, and 50%, using RT-QPCR. Techniques for RT-QPCR were sufficiently sensitive to detect 10 copies of viral RNA in a sample and to detect BVDV associated with single embryos. Application of this new technology, RT-QPCR, will facilitate additional studies to further assess the risk of transmission of BVDV through embryo transfer.
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Affiliation(s)
- J A Gard
- Department of Clinical Sciences, College of Veterinary Medicine, Auburn University, AL 36849, USA.
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13
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Passler T, Walz PH, Ditchkoff SS, Givens MD, Maxwell HS, Brock KV. Experimental persistent infection with bovine viral diarrhea virus in white-tailed deer. Vet Microbiol 2007; 122:350-6. [PMID: 17353103 DOI: 10.1016/j.vetmic.2007.01.028] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2006] [Revised: 01/19/2007] [Accepted: 01/29/2007] [Indexed: 11/17/2022]
Abstract
Bovine viral diarrhea virus (BVDV) infections cause substantial economic losses to the cattle industries. Persistently infected (PI) cattle are the most important reservoir for BVDV. White-tailed deer (Odocoileus virginianus) are the most abundant species of wild ruminants in the United States and contact between cattle and deer is common. If the outcome of fetal infection of white-tailed deer is similar to cattle, PI white-tailed deer may pose a threat to BVDV control programs. The objective of this study was to determine if experimental infection of pregnant white-tailed deer with BVDV would result in the birth of PI offspring. Nine female and one male white-tailed deer were captured and housed at a captive deer isolation facility. After natural mating had occurred, all does were inoculated intranasally at approximately 50 days of pregnancy with 10(6) CCID(50) each of a BVDV 1 (BJ) and BVDV 2 (PA131) strain. Although no clinical signs of BVDV infection were observed or abortions detected, only one pregnancy advanced to term. On day 167 post-inoculation, one doe delivered a live fawn and a mummified fetus. The fawn was translocated to an isolation facility to be hand-raised. The fawn was determined to be PI with BVDV 2 by serial virus isolation from serum and white blood cells, immunohistochemistry on skin biopsy, and RT-PCR. This is the first report of persistent infection of white-tailed deer with BVDV. Further research is needed to assess the impact of PI white-tailed deer on BVDV control programs in cattle.
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Affiliation(s)
- Thomas Passler
- Department of Clinical Sciences, College of Veterinary Medicine, Auburn University, AL 36849-2900, USA
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14
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Givens MD, Riddell KP, Walz PH, Rhoades J, Harland R, Zhang Y, Galik PK, Brodersen BW, Cochran AM, Brock KV, Carson RL, Stringfellow DA. Noncytopathic bovine viral diarrhea virus can persist in testicular tissue after vaccination of peri-pubertal bulls but prevents subsequent infection. Vaccine 2007; 25:867-76. [PMID: 17005300 DOI: 10.1016/j.vaccine.2006.09.037] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2006] [Revised: 09/01/2006] [Accepted: 09/08/2006] [Indexed: 11/17/2022]
Abstract
The objectives of this research were to evaluate the risk of prolonged testicular infection as a consequence of vaccination of peri-pubertal bulls with a modified-live, noncytopathic strain of BVDV and to assess vaccine efficacy in preventing prolonged testicular infections after a subsequent acute infection. Seronegative, peri-pubertal bulls were vaccinated subcutaneously with an approximate minimum immunizing dose or a 10x standard dose of modified-live, noncytopathic BVDV or were maintained as unvaccinated controls. Forty-nine days after vaccination, all bulls were intranasally inoculated with a noncytopathic field strain of BVDV. Semen and testicular biopsies collected after vaccination and challenge were assayed for BVDV using virus isolation, reverse transcription-nested PCR, or immunohistochemistry and the identity of viral strains was determined by nucleotide sequencing of PCR products. The vaccine strain of BVDV was detected in testicular tissue of vaccinated bulls as long as 134 days after immunization. Prolonged testicular infections with the challenge strain were detected only in unvaccinated bulls as long as 85 days after challenge. Whereas vaccination caused prolonged testicular infection in some bulls, it did prevent subsequent infection of testicular tissue with the challenge strain. This research demonstrates that subcutaneous vaccination of naïve, peri-pubertal bulls with a noncytopathic, modified-live strain of BVDV can result in prolonged viral replication within testicular tissue. The risk for these prolonged testicular infections to cause venereal transmission of BVDV or subfertility is likely to be low but requires further investigation.
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Affiliation(s)
- M Daniel Givens
- Department of Pathobiology, College of Veterinary Medicine, Auburn University, AL 36849, United States.
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15
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Givens MD, Stringfellow DA, Riddell KP, Galik PK, Carson RL, Riddell MG, Navarre CB. Normal calves produced after transfer of in vitro fertilized embryos cultured with an antiviral compound. Theriogenology 2006; 65:344-55. [PMID: 15955552 DOI: 10.1016/j.theriogenology.2005.04.027] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2005] [Accepted: 04/13/2005] [Indexed: 10/25/2022]
Abstract
Bovine viral diarrhea virus (BVDV) replicates in embryo co-culture systems and remains associated with developing IVF bovine embryos, despite washing and trypsin treatment. Previous research demonstrated that 2-(4-[2-imidazolinyl]phenyl)-5-(4-methoxyphenyl)furan (DB606) inhibits replication of BVDV in cultured cells. The objective of this study was to evaluate the capability of IVF embryos to develop into normal, weaned calves after exposure to antiviral concentrations of DB606 during IVC. Oocytes were obtained from cows via transvaginal, ultrasound-guided follicular aspiration. Presumptive zygotes (n = 849) that resulted from fertilization of these oocytes were cultured for 7 d in medium supplemented with 0.4 microM DB606 or medium lacking antiviral agent. All blastocysts (n = 110) were transferred individually into the uterus of a synchronized recipient. The pregnancy status of recipients was determined using transrectal ultrasonography at 21-23 d after embryo transfer. Additional pregnancies as controls (n = 21) were initiated by natural breeding. Developing fetuses and resulting calves were evaluated every 27-34 d. Blastocyst development, pregnancies per transferred embryo, pregnancies maintained per pregnancies established, gestation length, gender ratio, birth weights, viability of neonates, complete blood counts, and serum chemistry profiles at 3 mo of age and adjusted 205 d weaning weights were compared for research treatments. Development to weaning after exposure to DB606 did not differ significantly from controls. In conclusion, bovine embryo cultures can be safely supplemented with antiviral concentrations of DB606; addition of DB606 agent might prevent viral transmission if BVDV were inadvertently introduced into the embryo culture system.
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Affiliation(s)
- M D Givens
- 127 Sugg Laboratory, College of Veterinary Medicine, Auburn University, AL 36849-5516, USA.
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16
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Saliki JT, Dubovi EJ. Laboratory diagnosis of bovine viral diarrhea virus infections. Vet Clin North Am Food Anim Pract 2004; 20:69-83. [PMID: 15062475 DOI: 10.1016/j.cvfa.2003.11.005] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Abstract
The past 20 years have witnessed dramatic improvements in laboratory methods for diagnosing bovine viral diarrhea virus(BVDV) infections. However, improvements in diagnostic technology have not necessarily led to improved diagnosis of BVDV at the individual animal or herd level. This article reviews BVDV laboratory diagnostic methods in the context of their rational application for improved detection of BVDV in the field.
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Affiliation(s)
- Jeremiah T Saliki
- Oklahoma Animal Disease Diagnostic Laboratory, Oklahoma State University, P.O. Box 7001, Stillwater, OK 74076-7001, USA.
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Givens MD, Heath AM, Carson RL, Brock KV, Edens MSD, Wenzel JGW, Stringfellow DA. Analytical sensitivity of assays used for detection of bovine viral diarrhea virus in semen samples from the Southeastern United States. Vet Microbiol 2004; 96:145-55. [PMID: 14519332 DOI: 10.1016/s0378-1135(03)00213-x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Bovine viral diarrhea virus (BVDV) is a significant pathogen that can be shed in the semen of infected bulls. Thus, screening for BVDV in semen of bulls is recommended prior to their entry into an artificial insemination center. No previous research has compared the analytical sensitivity of reverse transcription-nested polymerase chain reaction (RT-nPCR) and virus isolation assays for detection of BVDV in semen from an infected bull. Therefore, the goals of this research were to compare the analytical sensitivity of RT-nPCR and virus isolation assays for BVDV in semen and to apply these assays to determine the prevalence in the Southeastern United States of bulls that lack viremia yet shed BVDV in semen. Semen collected from a bull that was persistently infected with BVDV was serially diluted (1/10) in semen from uninfected bulls and frozen in liquid nitrogen as raw, partially extended or fully extended semen. Subsequently, samples of semen were assayed by virus isolation and RT-nPCR. Viral detection was more sensitive in extended semen samples than in raw semen samples and more sensitive by RT-nPCR than virus isolation. After this evaluation of analytical sensitivity, serum and semen were collected from 558 post-pubertal bulls in our region. These samples were tested for BVDV by virus isolation. Partially extended semen was also assayed for BVDV by RT-nPCR. All samples were negative by all assays for BVDV. The application of analytically sensitive assays reveals a very low prevalence (</=0.54%) of BVDV in semen from bulls in the Southeastern United States.
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Affiliation(s)
- M D Givens
- Department of Pathobiology, College of Veterinary Medicine, Auburn University, Auburn, AL 36849-5512, USA.
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Stringfellow DA, Givens MD, Waldrop JG. Biosecurity issues associated with current and emerging embryo technologies. Reprod Fertil Dev 2004. [DOI: 10.1071/rd03082] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
A variety of procedures associated with in vivo and in vitro embryo production, as well as cloning and transgenics, are in current use by both researchers and practitioners. Biohazards associated with these procedures could influence clinical proficiency and the outcome of basic research or result in unusual distribution of pathogens in populations of animals. By their nature, embryo technologies are vulnerable to contamination from numerous sources. Although pathogens can originate in the physical environments in which embryo technologies are applied, they are more likely to be introduced via animals or materials of animal origin. However, it is important to note that both the occurrence and consequences of contamination are heavily influenced by environmental circumstances. This paper represents a philosophical description of biohazards associated with three generations of embryo technologies using the cow as a model species. Emphasis is placed on sources of contamination, current or suggested preventive actions and the issue of environmental changes as they relate to the emergence of biohazards and the implementation of biosecurity measures. Some specific pathogens are discussed for illustration. In addition, details of the risks associated with introducing bovine viral diarrhoea virus in each of three generations of embryo technologies are described.
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Givens MD, Heath AM, Brock KV, Brodersen BW, Carson RL, Stringfellow DA. Detection of bovine viral diarrhea virus in semen obtained after inoculation of seronegative postpubertal bulls. Am J Vet Res 2003; 64:428-34. [PMID: 12693532 DOI: 10.2460/ajvr.2003.64.428] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To evaluate persistence of bovine viral diarrhea virus (BVDV) in semen after inoculation of postpubertal bulls. ANIMALS Three 2-year-old bulls and five 6-month-old calves. PROCEDURE 3 seronegative 2-year-old bulls were inoculated intranasally with BVDV. Serum and semen samples were obtained at regular intervals until 7 months after inoculation. Serum samples were tested for BVDV by use of virus isolation (VI) and reverse transcription-nested polymerase chain reaction (RT-nPCR) tests. Semen samples were tested for virus by use of VI and RT-nPCR tests. Testicular biopsy specimens were obtained 7 months after inoculation and tested for BVDV by use of immunohistochemical analysis and VI and RT-nPCR tests. Semen samples collected from 1 bull immediately before and 5 and 7 months after inoculation were administered IV to seronegative calves, which were monitored for subsequent viremia and seroconversion. RESULTS Use of VI and RT-nPCR tests detected transient virus in serum of all bulls. The VI test detected BVDV in semen of 2 bulls for < 21 days after inoculation, whereas RT-nPCR assay detected BVDV until 7 months after inoculation. Virus was detected in testicular biopsy specimens of these 2 bulls by use of immunohistochemical analysis and RT-nPCR assay but could only be isolated from the biopsy specimen of 1 bull. Of the calves administered semen IV to detect infectious virus, only the recipient of semen collected 5 months after inoculation of the adult bull was viremic and seroconverted. CONCLUSIONS AND CLINICAL RELEVANCE Bovine viral diarrhea virus can persist in semen of acutely infected bulls for several months after exposure.
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Affiliation(s)
- M Daniel Givens
- Department of Pathobiology, College of Veterinary Medicine, Auburn University, Auburn University, AL 36849, USA
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