Literaturdatenbank
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Brenes, R. M. (2013). Mechanisms contributing to the emergence of ranavirus in ectothermic vertebrate communities. Unpublished thesis 131 pp. University of Tennessee, Knoxville.
Added by: Admin (06 Jan 2014 18:24:08 UTC) |
| Resource type: Thesis/Dissertation BibTeX citation key: anon2013y View all bibliographic details  |
Categories: General Keywords: Apalone ferox, Emydidae, Pseudemys concinna, Schildkröten - turtles + tortoises, Trachemys scripta, Trionychidae, Veterinärmedizin - veterinary medicine, Viren - viruses Creators: Brenes Publisher: University of Tennessee (Knoxville) |
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| URLs http://trace.tenne ... /utk_graddiss/2402 |
| Abstract |
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susceptibility: Florida soft-shell turtle (Apalone ferox, Trionychidae), eastern river cooter (Pseudemys concinna), and Mississippi map turtle (Graptemys kohni, Emydidae) if syntopic species from different ectothermic classes known to be susceptible to ranaviruses, specifically the red-eared slider turtle (Trachemys scripta) The low susceptibility of the turtles that I tested to ranavirus was unexpected, as cases of ranaviral infection and disease have been reported in at least 11 tortoise and box turtle species (Marschang et al. 1999, De Voe et al. 2004, Benetka et al. 2007, Johnson et al. 2007, Johnson et al. 2010, Marschang 2011), red-eared slider turtle (Johnson et al. 2006, Johnson et al. 2010) and Chinese soft-shelled turtle (Chen et al. 1999) in both natural and laboratory environments (Chen et al. 1999, De Voe et al. 2004, Allender et al. 2006, Johnson et al. 2008). However, most of these reports were diagnostic cases on a single individual or challenge experiments via intraperitoneal injection, which is an unrealistic transmission route (Gray et al. 2009). Lastly, these susceptibility results likely reflect a best-case scenario inasmuch as my experiments were conducted under controlled conditions with ad libitum food. Additionally, factors that contribute to ranavirus emergence such as density dependent transmission were controlled. In wild or captive populations, multiple infected and morbid individuals can be present, which might increase the likelihood of transmission to other ectothermic vertebrates, particularly those that predate (e.g., fish) or scavenge (e.g., turtles) other hosts. Also, infected turtles and fish transmitted ranavirus to 50% and 20% of the naïve gray treefrog larvae, respectively. Nearly all of infected amphibians experienced mortality, whereas infected turtles and fish did not die.
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