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Apakupakul K, Duncan M, Subramaniam K, Brenn-White M, Palmer JL, Viadanna PHO, Vann JA, Adamovicz L, Waltzek TB, Deem SL. Ranavirus (Frog Virus 3) Infection in Free-Living Three-Toed Box Turtles (Terrapene mexicana triunguis) in Missouri, USA. J Wildl Dis 2024; 60:151-163. [PMID: 37921651 DOI: 10.7589/jwd-d-23-00057] [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: 04/03/2023] [Accepted: 07/28/2023] [Indexed: 11/04/2023]
Abstract
Frog virus 3 (FV3) and related ranaviruses are emerging infectious disease threats to ectothermic vertebrate species globally. Although the impact of these viruses on amphibian health is relatively well studied, less is understood about their effects on reptile health. We report two cases of FV3 infection, 11 mo apart, in three-toed box turtles (Terrapene mexicana triunguis) from a wildlife rehabilitation center. Case 1 had upper respiratory signs upon intake but had no clinical signs at the time of euthanasia 1 mo later. Case 2 presented for vehicular trauma, had ulcerative pharyngitis and glossitis, and died overnight. In case 1, we detected FV3 nucleic acid with qPCR in oral swabs, kidney, liver, spleen, and tongue. In case 2, we detected FV3 in an oral swab, an oral plaque, heart, kidney, lung, liver, spleen, and tongue. We also detected FV3 nucleic acid with in situ hybridization for case 2. For both cases, FV3 was isolated in cell culture and identified with DNA sequencing. Histopathologic examination of postmortem tissue from case 1 was unremarkable, whereas acute hemorrhagic pneumonia and splenic necrosis were noted in case 2. The difference in clinical signs between the two cases may have been due to differences in the temporal course of FV3 disease at the time of necropsy. Failure to detect this infection previously in Missouri reptiles may be due to lack of surveillance, although cases may also represent a novel spillover to box turtles in Missouri. Our findings reiterate previous suggestions that the range of FV3 infection may be greater than previously documented and that infection may occur in host species yet to be tested.
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Affiliation(s)
- Kathleen Apakupakul
- Saint Louis Zoo Institute for Conservation Medicine, 1 Government Dr., St. Louis, Missouri 63110, USA
| | - Mary Duncan
- Saint Louis Zoo Department of Animal Health, 1 Government Dr., St. Louis, Missouri 63110, USA
| | - Kuttichantran Subramaniam
- Department of Infectious Diseases and Immunology, College of Veterinary Medicine, University of Florida, 2187 Mowry Rd., Bldg. 0471, Gainesville, Florida 32611, USA
- Emerging Pathogens Institute, University of Florida, 2055 Mowry Rd., Gainesville, Florida 32610, USA
| | - Maris Brenn-White
- Saint Louis Zoo Institute for Conservation Medicine, 1 Government Dr., St. Louis, Missouri 63110, USA
| | - Jamie L Palmer
- Saint Louis Zoo Institute for Conservation Medicine, 1 Government Dr., St. Louis, Missouri 63110, USA
| | - Pedro H O Viadanna
- Department of Infectious Diseases and Immunology, College of Veterinary Medicine, University of Florida, 2187 Mowry Rd., Bldg. 0471, Gainesville, Florida 32611, USA
- Emerging Pathogens Institute, University of Florida, 2055 Mowry Rd., Gainesville, Florida 32610, USA
| | - Jordan A Vann
- Department of Infectious Diseases and Immunology, College of Veterinary Medicine, University of Florida, 2187 Mowry Rd., Bldg. 0471, Gainesville, Florida 32611, USA
- Emerging Pathogens Institute, University of Florida, 2055 Mowry Rd., Gainesville, Florida 32610, USA
| | - Laura Adamovicz
- Wildlife Epidemiology Laboratory, University of Illinois College of Veterinary Medicine, 2001 S. Lincoln Ave., Urbana, Illinois 61802, USA
| | - Thomas B Waltzek
- Department of Infectious Diseases and Immunology, College of Veterinary Medicine, University of Florida, 2187 Mowry Rd., Bldg. 0471, Gainesville, Florida 32611, USA
- Emerging Pathogens Institute, University of Florida, 2055 Mowry Rd., Gainesville, Florida 32610, USA
- Current affiliation: Washington Animal Disease Diagnostic Laboratory and Department of Veterinary Microbiology and Pathology, College of Veterinary Medicine, Washington State University, P.O. Box 647034, Pullman, Washington, USA
| | - Sharon L Deem
- Saint Louis Zoo Institute for Conservation Medicine, 1 Government Dr., St. Louis, Missouri 63110, USA
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Penny FM, Bugg WS, Kieffer JD, Jeffries KM, Pavey SA. Atlantic sturgeon and shortnose sturgeon exhibit highly divergent transcriptomic responses to acute heat stress. COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY. PART D, GENOMICS & PROTEOMICS 2023; 45:101058. [PMID: 36657229 DOI: 10.1016/j.cbd.2023.101058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 01/10/2023] [Accepted: 01/10/2023] [Indexed: 01/18/2023]
Abstract
In comparison to most modern teleost fishes, sturgeons generally display muted stress responses. While a muted stress response appears to be ubiquitous across sturgeon species, the mechanisms unpinning this muted response have not been fully described. The objective of this study was to determine the patterns of hematological and transcriptomic change in muscle tissue following an acute high temperature stress (critical thermal maxima; CTmax) in two locally co-occurring but evolutionarily distant sturgeon species (Atlantic and shortnose sturgeon). The most striking pattern found was that Atlantic sturgeon launched a vigorous transcriptomic response at CTmax, whereas shortnose sturgeon did not. In contrast, shortnose sturgeon have significantly higher cortisol than Atlantics at CTmax, reconfirming that shortnose have a less muted cortisol stress response. Atlantic sturgeon downregulated a number of processes, included RNA creation/processing, methylation and immune processes. Furthermore, a number of genes related to heat shock proteins were differentially expressed at CTmax in Atlantic sturgeon but none of these genes were significantly changed in shortnose sturgeon. We also note that the majority of differentially expressed genes of both species are undescribed and have no known orthologues. These results suggest that, while sturgeons as a whole may show muted stress responses, individual sturgeon species likely use different inducible strategies to cope with acute high temperature stress.
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Affiliation(s)
- F M Penny
- Department of Biological Sciences and Canadian Rivers Institute (CRI Genomics), University of New Brunswick, Saint John, New Brunswick E2L 4L5, Canada.
| | - W S Bugg
- Department of Biological Sciences, University of Manitoba, 50 Sifton Road, Winnipeg, Manitoba R3T 2N2, Canada
| | - J D Kieffer
- Department of Biological Sciences (MADSAM Lab), University of New Brunswick, Saint John, New Brunswick E2L 4L5, Canada
| | - K M Jeffries
- Department of Biological Sciences, University of Manitoba, 50 Sifton Road, Winnipeg, Manitoba R3T 2N2, Canada
| | - S A Pavey
- Department of Biological Sciences and Canadian Rivers Institute (CRI Genomics), University of New Brunswick, Saint John, New Brunswick E2L 4L5, Canada
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