First evidence of ranavirus in native and invasive amphibians in Colombia

Diseases of Aquatic Organisms, Journal Year: 2023, Volume and Issue: 153, P. 51 - 58

Published: Jan. 9, 2023

Ranaviruses can cause mass mortality events in amphibians, thereby becoming a threat to populations that are already facing dramatic declines. affect all life stages and persist multiple amphibian hosts. The detrimental effects of ranavirus infections have been observed the UK North America. In Central South America, virus has reported several countries, but presence genus Ranavirus (Rv) Colombia is unknown. To help fill this knowledge gap, we surveyed for Rv 60 species frogs (including one invasive species) Colombia. We also tested co-infection with Batrachochytrium dendrobatidis (Bd) subset individuals. For Rv, sampled 274 vouchered liver tissue samples collected between 2014 2019 from 41 localities covering lowlands mountaintop páramo habitat across country. Using quantitative polymerase chain reaction (qPCR) end-point PCR, detected 14 individuals 8 localities, representing 6 species, including 5 native genera Osornophryne, Pristimantis Leptodactylus, American bullfrog Rana catesbeiana. Bd was 7 140 individuals, 1 an R. catesbeiana specimen 2018. This constitutes first report should set off alarms about new emerging Our findings provide some preliminary clues how when may spread contribute understanding pathogen distributed globally.

Language: Английский

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Water sports could contribute to the translocation of ranaviruses

Scientific Reports, Journal Year: 2019, Volume and Issue: 9(1)

Published: Feb. 20, 2019

Abstract Ranaviruses have been identified as the cause of explosive disease outbreaks in amphibians worldwide and can be transmitted between hosts both via direct indirect contact, which humans might contribute to translocation contaminated material. The aim this study was evaluate possible role water sports human ranavirus, Batrachochytrium dendrobatidis (Bd) , B . salamandrivorans (Bsal) A total 234 boats were sampled during spring Spanish Canoe Championship took place Pontillón de Castro, a reservoir with history ranavirosis, May 2017. Boats tested for presence ranavirus spp. DNA, using quantitative real-time polymerase chain reaction techniques (qPCR). 22 swabs (22/234, 9.40%) yielded qPCR-positive results Ranavirus DNA while Bd or Bsal not detected any samples. We provide first evidence that human-related could source contamination, providing justification public disinfecting stations key areas where traffic from is high.

Language: Английский

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Population‐level variation in infection outcomes not influenced by pesticide exposure in larval wood frogs (Rana sylvatica)

Freshwater Biology, Journal Year: 2021, Volume and Issue: 66(6), P. 1169 - 1181

Published: March 30, 2021

Abstract There is increasing evidence that populations of non‐target wildlife species can evolve tolerance to pesticides. As ecosystems become increasingly exposed chemical contaminants globally, it important consider not only the immediate consequences contaminant exposure but also potential costs associated with evolved responses. Theory predicts there may be trade‐offs, including increased susceptibility parasites, pesticide tolerance. It remains unclear, however, how environmental context (i.e. presence/absence pesticides in contemporary environment) interacts levels influence infection outcomes. Several studies have demonstrated wood frog ( Rana sylvatica ) close agriculture, where frequent more likely, show higher baseline than do far from agriculture. Using eight across an agricultural gradient, we explored patterns variation parasites a population's proximity agriculture (a proxy for tolerance), and these are influenced by experimental tadpoles insecticide carbaryl. We did this first placing environment containing carbaryl (1 mg/L) or pesticide‐free control 5 days, subsequently exposing trematodes Echinostoma trivolvis ranavirus (frog virus 3). found trematode was related tadpole populations’ Individuals located were modestly susceptible infections individuals farther Ranavirus Surprisingly, survival rates infected ranavirus. no other significant effects on measured disease This study provides trade‐off between resistance putative host vary significantly their pathogens, does always increase parasite uniformly exacerbate Further research needed determine genetic among impact if consistent space time.

Language: Английский

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Pollinator behaviour and prevalence of the anther smut Antherospora vindobonensis in its host, the Hungarian two-leaf squill (Scilla vindobonensis)

Botanical studies, Journal Year: 2024, Volume and Issue: 65(1)

Published: Sept. 29, 2024

Language: Английский

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Ranavirus Ecology: From Individual Infections to Population Epidemiology to Community Impacts

Published: Oct. 11, 2024

Abstract While ranaviruses were initially a focus of scientific study primarily among virologists, the continued and growing interest in them stems largely from their impacts on host populations communities. Here, we present an overview what is known ranavirus ecology individual hosts (e.g., many factors that influence likelihood outcome infections), communities transmission, persistence, causes such varied outcomes epidemics), across landscapes, with how processes or at one level might scale up to next level. Throughout chapter, also highlight important unanswered questions research challenges opportunities.

Language: Английский

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