Temperature-dependent infection of freshwater turtle hatchlings, Emydura macquarii krefftii, inoculated with a ranavirus isolate (Bohle iridovirus, Iridoviridae)

Wirth, Wytamma, and Ariel, Ellen (2020) Temperature-dependent infection of freshwater turtle hatchlings, Emydura macquarii krefftii, inoculated with a ranavirus isolate (Bohle iridovirus, Iridoviridae). Facets, 5 (1). pp. 821-830.

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Abstract

Fish, amphibians, and reptiles exhibit temperature-dependent ranaviral disease. We performed an experimental infection at four different environmental temperatures (16, 22, 28, and 34 °C) to investigate the effect of temperature on ranaviral infection in Krefft's turtle (Emydura macquarii krefftii). Infection rates and viral loads were determined by quantitative polymerase chain reaction to detect ranaviral DNA in liver samples at 21 d postexposure. The rate of infection differed across the temperature treatment groups. Infection rates were 44%, 90%, 60%, and 10% for the 16, 22, 28, and 34 °C temperature groups, respectively. Highest viral load was observed in the 28 °C temperature group, and there was a statistically significant difference in viral load between the 16 and 28 °C temperature groups (p = 0.027). Based on the results of this study, the temperature of maximal infection rate for ranaviral infection in Krefft's river turtles is estimated to be 23.2 °C (SD= 4.5). The findings of this study can inform management decisions.

Item ID: 64646
Item Type: Article (Research - C1)
ISSN: 2371-1671
Keywords: ranavirus, reptiles, turtles, temperature, infection
Copyright Information: © 2020 Wirth and Ariel. This work is licensed under aCreative Commons Attribution 4.0 International License (CC BY4.0), which permits unrestricted use,distribution, and reproduction in any medium, provided the original author(s) and source are credited.
Date Deposited: 26 Oct 2020 02:04
FoR Codes: 07 AGRICULTURAL AND VETERINARY SCIENCES > 0707 Veterinary Sciences > 070712 Veterinary Virology @ 100%
SEO Codes: 96 ENVIRONMENT > 9604 Control of Pests, Diseases and Exotic Species > 960404 Control of Animal Pests, Diseases and Exotic Species in Forest and Woodlands Environments @ 100%
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