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Tsuchida DY, Gentzkow MF, Spaan RS, Burco J, Couch CE, Spaan JM, Epps CW, Beechler BR. Bighorn Sheep (Ovis canadensis) with Higher Whole Blood Selenium Levels Have Improved Survival and Altered Immune Responses. J Wildl Dis 2024; 60:721-726. [PMID: 38659241 DOI: 10.7589/jwd-d-23-00042] [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: 03/09/2023] [Accepted: 02/07/2024] [Indexed: 04/26/2024]
Abstract
Bighorn sheep (Ovis canadensis) are herbivorous ungulates that live in forage-poor areas of the American west. The trace minerals that herbivores derive from forage are important for immune function. Therefore, identifying trace minerals that affect immune function in bighorn sheep could provide important insights into disease susceptibility and population health in threatened populations. We sought to determine whether trace mineral composition in blood or plasma correlates to survival and determine whether immunologic parameters correlate with any trace minerals that affect survival. We used data collected from 2016 to 2018 as part of a large study on bighorn sheep in southeastern Oregon and northern Nevada, US. We measured the survival of 135 bighorn sheep during the 8-mo monitoring period, including general metrics of immune function and trace mineral levels. We found that animals with higher selenium had improved survival over the monitoring period, with higher peripheral blood mononuclear cell activity (lymphocytes and monocytes) and lower bacterial killing ability in an in vitro assay. This suggests that bighorn sheep may have altered immune function when selenium levels are low, making them more likely to die during the 8-mo monitoring period. Future work should consider whether habitat management strategies that increase selenium intake might improve disease resistance and survival in bighorn sheep in selenium-poor areas.
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Affiliation(s)
- Dana Y Tsuchida
- Carlson College of Veterinary Medicine, Oregon State University, 700 SW 30th Street, Corvallis, Oregon 97331, USA
- These authors contributed equally
| | - Morgan F Gentzkow
- Carlson College of Veterinary Medicine, Oregon State University, 700 SW 30th Street, Corvallis, Oregon 97331, USA
- These authors contributed equally
| | - Robert S Spaan
- Carlson College of Veterinary Medicine, Oregon State University, 700 SW 30th Street, Corvallis, Oregon 97331, USA
- Oregon State University, Department of Fisheries, Wildlife and Conservation Sciences, 2820 SW Campus Way, Corvallis, Oregon 97331, USA
| | - Julia Burco
- Oregon Department of Fish and Wildlife, Wildlife Health and Population Lab, 7118 NE Vandenberg Avenue, Adair Village, Oregon 97330, USA
| | - Claire E Couch
- Carlson College of Veterinary Medicine, Oregon State University, 700 SW 30th Street, Corvallis, Oregon 97331, USA
- Oregon State University, Department of Fisheries, Wildlife and Conservation Sciences, 2820 SW Campus Way, Corvallis, Oregon 97331, USA
| | - Johannie M Spaan
- Western University of Health Sciences, 200 Mullins Drive, Lebanon, Oregon 97355, USA
| | - Clinton W Epps
- Oregon State University, Department of Fisheries, Wildlife and Conservation Sciences, 2820 SW Campus Way, Corvallis, Oregon 97331, USA
| | - Brianna R Beechler
- Carlson College of Veterinary Medicine, Oregon State University, 700 SW 30th Street, Corvallis, Oregon 97331, USA
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Malmberg JL, Allen SE, Jennings-Gaines JE, Johnson M, Luukkonen KL, Robbins KM, Cornish TE, Smiley RA, Wagler BL, Gregory Z, Lutz D, Hnilicka P, Monteith KL, Edwards WH. Pathology of Chronic Mycoplasma ovipneumoniae Carriers in a Declining Bighorn Sheep (Ovis canadensis) Population. J Wildl Dis 2024; 60:448-460. [PMID: 38329742 DOI: 10.7589/jwd-d-23-00132] [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: 08/03/2023] [Accepted: 01/02/2024] [Indexed: 02/09/2024]
Abstract
Bighorn sheep (Ovis canadensis) across North America commonly experience population-limiting epizootics of respiratory disease. Although many cases of bighorn sheep pneumonia are polymicrobial, Mycoplasma ovipneumoniae is most frequently associated with all-age mortality events followed by years of low recruitment. Chronic carriage of M. ovipneumoniae by adult females serves as a source of exposure of naïve juveniles; relatively few ewes may be responsible for maintenance of infection within a herd. Test-and-remove strategies focused on removal of adult females with evidence of persistent or intermittent shedding (hereafter chronic carriers) may reduce prevalence and mitigate mortality. Postmortem confirmation of pneumonia in chronic carriers has been inadequately reported and the pathology has not been thoroughly characterized, limiting our understanding of important processes shaping the epidemiology of pneumonia in bighorn sheep. Here we document postmortem findings and characterize the lesions of seven ewes removed from a declining bighorn sheep population in Wyoming, USA, following at least two antemortem detections of M. ovipneumoniae within a 14-mo period. We confirmed that 6/7 (85.7%) had variable degrees of chronic pneumonia. Mycoplasma ovipneumoniae was detected in the lung of 4/7 (57.1%) animals postmortem. Four (57.1%) had paranasal sinus masses, all of which were classified as inflammatory, hyperplastic lesions. Pasteurella multocida was detected in all seven (100%) animals, while Trueperella pyogenes was detected in 5/7 (71.4%). Our findings indicate that not all chronic carriers have pneumonia, nor do all have detectable M. ovipneumoniae in the lung. Further, paranasal sinus masses are a common but inconsistent finding, and whether sinus lesions predispose to persistence or result from chronic carriage remains unclear. Our findings indicate that disease is variable in chronic M. ovipneumoniae carriers, underscoring the need for further efforts to characterize pathologic processes and underlying mechanisms in this system to inform management.
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Affiliation(s)
- Jennifer L Malmberg
- Department of Veterinary Sciences, University of Wyoming, 1174 Snowy Range Road, Laramie, Wyoming 82070, USA
- Wyoming State Veterinary Laboratory, 1174 Snowy Range Road, Laramie, Wyoming 82070
- Current affiliation and address: National Wildlife Research Center, Wildlife Services, Animal and Plant Health Inspection Service, United States Department of Agriculture, 4101 LaPorte Avenue, Fort Collins, Colorado 80521, USA
| | - Samantha E Allen
- Wyoming Game and Fish Department, Veterinary Services, 1212 South Adams Street, Laramie, Wyoming 82070, USA
| | - Jessica E Jennings-Gaines
- Wyoming Game and Fish Department, Veterinary Services, Wildlife Health Laboratory, 1174 Snowy Range Road, Laramie, Wyoming 82070, USA
| | - Marguerite Johnson
- Wyoming Game and Fish Department, Veterinary Services, Wildlife Health Laboratory, 1174 Snowy Range Road, Laramie, Wyoming 82070, USA
| | - Katie L Luukkonen
- Wyoming Game and Fish Department, Veterinary Services, Wildlife Health Laboratory, 1174 Snowy Range Road, Laramie, Wyoming 82070, USA
| | - Kara M Robbins
- Wyoming Game and Fish Department, Veterinary Services, Wildlife Health Laboratory, 1174 Snowy Range Road, Laramie, Wyoming 82070, USA
| | - Todd E Cornish
- California Animal Health and Food Safety Lab, University of California-Davis, 18760 Road 112, Tulare, California 93274, USA
| | - Rachel A Smiley
- University of Wyoming, Haub School of the Environment and Natural Resources, Wyoming Cooperative Fish and Wildlife Research Unit, Department of Zoology and Physiology, 804 East Fremont Street, Laramie, Wyoming 82071, USA
| | - Brittany L Wagler
- University of Wyoming, Haub School of the Environment and Natural Resources, Wyoming Cooperative Fish and Wildlife Research Unit, Department of Zoology and Physiology, 804 East Fremont Street, Laramie, Wyoming 82071, USA
| | - Zach Gregory
- Wyoming Game and Fish Department, 260 Buena Vista Drive, Lander, Wyoming 82520, USA
| | - Daryl Lutz
- Wyoming Game and Fish Department, 260 Buena Vista Drive, Lander, Wyoming 82520, USA
| | - Pat Hnilicka
- US Fish and Wildlife Service, 170 North First Street, Lander, Wyoming 82520, USA
| | - Kevin L Monteith
- University of Wyoming, Haub School of the Environment and Natural Resources, Wyoming Cooperative Fish and Wildlife Research Unit, Department of Zoology and Physiology, 804 East Fremont Street, Laramie, Wyoming 82071, USA
| | - William H Edwards
- Wyoming Game and Fish Department, Veterinary Services, Wildlife Health Laboratory, 1174 Snowy Range Road, Laramie, Wyoming 82070, USA
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Construction of a novel "self-regenerative" electrochemical biosensor based on metal-organic frameworks and its application to the detection of Mycoplasma ovine pneumonia. Bioelectrochemistry 2023; 152:108409. [PMID: 36898345 DOI: 10.1016/j.bioelechem.2023.108409] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2022] [Revised: 02/27/2023] [Accepted: 03/01/2023] [Indexed: 03/07/2023]
Abstract
This study aimed to prepare a novel "self-regenerative" electrochemical biosensor by successively modifying gold nanoparticles, four-arm polyethylene glycol-NH2, and NH2-MIL-53 (Al) (MOF) on the glassy carbon electrode interface. A hairpin G-triplex-mediated DNA (G3 probe) as a part of the mycoplasma ovine pneumonia (MO) gene was loosely adsorbed to MOF. Based on the mechanism of hybridization induction, the G3 probe could effectively detach from the MOF only after introducing the target DNA. Subsequently, its guanine-rich nucleic acid sequences were exposed to solution of methylene blue. As a result, the diffusion current of the sensor system showed a sharp decline. The developed biosensor showed excellent selectivity, and the concentration of target DNA exhibited a good correlation in the range 10-10 to 10-6 M with a detection limit of 1.00 pM (S/N = 3), even in 10% goat serum. Most interestingly, this biosensor interface automatically started the regeneration program. Moreover, regeneration could be effectively achieved at least seven times, and the recovery rate of the electrode interface and sensing efficiency was up to 90%. Additionally, this platform could be used for other clinical assays in various systems by simply changing the DNA sequence of the probe.
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Ma Y, Wu C, Yang W, Gao Z, Chen L. DNA hybridization-induced fluorescence variation in ThT: a new strategy of developing aqueous sensors for MO genes. Analyst 2022; 147:1631-1640. [DOI: 10.1039/d1an02301b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
MOFs-based sensors for detecting the Mycoplasma ovipneumoniae (MO) using binding-induced dynamic DNA assembly exhibits perfect selectivity, low detection limitation and wide linear range not only in buffer, but also in natural complex media.
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Affiliation(s)
- Yunkang Ma
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science; Shandong Key Laboratory of Biochemical Analysis; Key Laboratory of Analytical Chemistry for Life Science in Universities of Shandong; Key Laboratory of Ecochemical Engineering; College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR China
| | - Chenhui Wu
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science; Shandong Key Laboratory of Biochemical Analysis; Key Laboratory of Analytical Chemistry for Life Science in Universities of Shandong; Key Laboratory of Ecochemical Engineering; College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR China
| | - Wenjie Yang
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science; Shandong Key Laboratory of Biochemical Analysis; Key Laboratory of Analytical Chemistry for Life Science in Universities of Shandong; Key Laboratory of Ecochemical Engineering; College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR China
| | - Zhigang Gao
- Xinbao agricultural Science and Technology Development Co. Ltd, Wujiaqu, Xinjiang 831300, China
| | - Lihua Chen
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science; Shandong Key Laboratory of Biochemical Analysis; Key Laboratory of Analytical Chemistry for Life Science in Universities of Shandong; Key Laboratory of Ecochemical Engineering; College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR China
- Xinbao agricultural Science and Technology Development Co. Ltd, Wujiaqu, Xinjiang 831300, China
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Almberg ES, Manlove KR, Cassirer EF, Ramsey J, Carson K, Gude J, Plowright RK. Modelling management strategies for chronic disease in wildlife: Predictions for the control of respiratory disease in bighorn sheep. J Appl Ecol 2021. [DOI: 10.1111/1365-2664.14084] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Kezia R. Manlove
- Department of Wildland Resources & Ecology Center Utah State University Logan UT USA
| | | | | | - Keri Carson
- Montana Fish, Wildlife, and Parks Bozeman MT USA
| | - Justin Gude
- Montana Fish, Wildlife, and Parks Bozeman MT USA
| | - Raina K. Plowright
- Department of Microbiology and Immunology Montana State University Bozeman MT USA
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Besser TE, Cassirer EF, Lisk A, Nelson D, Manlove KR, Cross PC, Hogg JT. Natural history of a bighorn sheep pneumonia epizootic: Source of infection, course of disease, and pathogen clearance. Ecol Evol 2021; 11:14366-14382. [PMID: 34765112 PMCID: PMC8571585 DOI: 10.1002/ece3.8166] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 08/21/2021] [Accepted: 08/31/2021] [Indexed: 11/06/2022] Open
Abstract
A respiratory disease epizootic at the National Bison Range (NBR) in Montana in 2016-2017 caused an 85% decline in the bighorn sheep population, documented by observations of its unmarked but individually identifiable members, the subjects of an ongoing long-term study. The index case was likely one of a small group of young bighorn sheep on a short-term exploratory foray in early summer of 2016. Disease subsequently spread through the population, with peak mortality in September and October and continuing signs of respiratory disease and sporadic mortality of all age classes through early July 2017. Body condition scores and clinical signs suggested that the disease affected ewe groups before rams, although by the end of the epizootic, ram mortality (90% of 71) exceeded ewe mortality (79% of 84). Microbiological sampling 10 years to 3 months prior to the epizootic had documented no evidence of infection or exposure to Mycoplasma ovipneumoniae at NBR, but during the epizootic, a single genetic strain of M. ovipneumoniae was detected in affected animals. Retrospective screening of domestic sheep flocks near the NBR identified the same genetic strain in one flock, presumptively the source of the epizootic infection. Evidence of fatal lamb pneumonia was observed during the first two lambing seasons following the epizootic but was absent during the third season following the death of the last identified M. ovipneumoniae carrier ewe. Monitoring of life-history traits prior to the epizootic provided no evidence that environmentally and/or demographically induced nutritional or other stress contributed to the epizootic. Furthermore, the epizootic occurred despite proactive management actions undertaken to reduce risk of disease and increase resilience in this population. This closely observed bighorn sheep epizootic uniquely illustrates the natural history of the disease including the (presumptive) source of spillover, course, severity, and eventual pathogen clearance.
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Affiliation(s)
- Thomas E. Besser
- Department of Veterinary Microbiology and PathologyWashington State UniversityPullmanWashingtonUSA
| | | | - Amy Lisk
- US Fish and Wildlife ServiceMoieseMontanaUSA
| | - Danielle Nelson
- Washington Animal Disease Diagnostic LaboratoryDepartment of Veterinary Microbiology and PathologyWashington State UniversityPullmanWashingtonUSA
| | - Kezia R. Manlove
- Department of Wildland Resources & Ecology CenterUtah State UniversityLoganUtahUSA
| | - Paul C. Cross
- U. S. Geological SurveyNorthern Rocky Mountain Science CenterBozemanMontanaUSA
| | - John T. Hogg
- Montana Conservation Science InstituteMissoulaMontanaUSA
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