Updates on Beak and Feather Disease virus

Research output: Other contribution to conferencePresentation only

Abstract

A focus of recent research into PBFD has been to investigate evolutionary pathways of BFDV in Australasian parrots and cockatoos with the aim to identify potential BFDV clades that might threaten endangered host species. Emerging consensus
indicates that Australian parrots are susceptible to a diversity of BFDV clades with no clear association based on host-virus co-speciation. The latest phylogeny of BFDV in parrot species throughout Australia is important for understanding the likely threats to vulnerable and endangered psittacine bird species such as the orange-bellied parrot ( Neophema chrysogaste), wstern ground parrot (Pezoropus flaviventris), swift parrot ( Lathamus disco.for) and regent parrot (Polytelis anthopeplus monarchoides). The latest results indicate that all endangered Australian psittacine bird species are equally likely to be infected by BFDV genotypes from any other close or distantly related host reservoir species. In the context of BFOV in the Australian landscape the involvement of (multiple and unknown alternative host species is a well recognised major confounder for wildlife disease modelling. Host population thresholds for the invasion or persistence of infectious disease, core concepts of disease ecology, have formed the basis of disease control policies. However, a definitive understanding of population thresholds for a multi-host disease such as PBFD is likely to never be resolved given the large number of potential host species and conceivable parameters which could dynamically influence intra and
interspecific transmission rates, alongside other factors such as abundance of important host reservoir species. Nevertheless, the phylogenetic analysis of BFDV genomes strongly indicates that no one genotype can be considered as more virulent
than another and as such it behaves like a viral quasispecies and host-generalist in the Psittaciformes, with shallow host-based divergence likely reflecting dynamic ranges of interspecific transmission. Increasing evidence supports a post-Gondwanan origin of BFDV in Australian species where the virus now exists as a pathogenic host­ generalist quasipecies capable of flexible host-switching amongst the psittacid avifauna of Australia and there ,is fossil evidence that Cacatua and the budgerigar have likely been present in Australia in their present forms for at least 5 million years. It is theoretically likely that BFDV has circulated as a quasispecies with limited host-based divergence amongst Australian Psittaciformes for at least this period. In contrast there is no strong evidence BFDV endemicity in native New Zealand parrot species prior to human colonisation and the recent detection of PBFD in wild New Zealand birds is explainable by the introduction of this pathogen with the release of infected feral eastern rosellas ( Platycercus eximius) from Australia. A similar scenario almost certainly occurred for the Norfolk Island green parrot.
Original languageEnglish
Publication statusPublished - 2014
EventAnnual Conference of the Wildlife Disease Association - Australasian Section: 2014 WDA-A Conference - Tidbinbillla Nature Reserve, Canberra, Australia
Duration: 28 Sep 201402 Oct 2014

Conference

ConferenceAnnual Conference of the Wildlife Disease Association - Australasian Section
CountryAustralia
CityCanberra
Period28/09/1402/10/14

Fingerprint

Beak and feather disease virus
parrots
Psittaciformes
disease reservoirs
birds
wildlife diseases
budgerigars
viruses
alternative hosts
Apodidae
genotype
phylogeny
Pacific Ocean Islands
infectious diseases
disease control
indigenous species

Grant Number

  • FT120100242

Cite this

Raidal, S., Sarker, S., Das, S., Ghorashi, S., Forwood, J., & Peters, A. (2014). Updates on Beak and Feather Disease virus. Paper presented at Annual Conference of the Wildlife Disease Association - Australasian Section, Canberra, Australia.
Raidal, Shane ; Sarker, Subir ; Das, Shubhagata ; Ghorashi, Seyed ; Forwood, Jade ; Peters, Andrew. / Updates on Beak and Feather Disease virus. Paper presented at Annual Conference of the Wildlife Disease Association - Australasian Section, Canberra, Australia.
@conference{77d404bee4e842e785c4970e4b851e19,
title = "Updates on Beak and Feather Disease virus",
abstract = "A focus of recent research into PBFD has been to investigate evolutionary pathways of BFDV in Australasian parrots and cockatoos with the aim to identify potential BFDV clades that might threaten endangered host species. Emerging consensusindicates that Australian parrots are susceptible to a diversity of BFDV clades with no clear association based on host-virus co-speciation. The latest phylogeny of BFDV in parrot species throughout Australia is important for understanding the likely threats to vulnerable and endangered psittacine bird species such as the orange-bellied parrot ( Neophema chrysogaste), wstern ground parrot (Pezoropus flaviventris), swift parrot ( Lathamus disco.for) and regent parrot (Polytelis anthopeplus monarchoides). The latest results indicate that all endangered Australian psittacine bird species are equally likely to be infected by BFDV genotypes from any other close or distantly related host reservoir species. In the context of BFOV in the Australian landscape the involvement of (multiple and unknown alternative host species is a well recognised major confounder for wildlife disease modelling. Host population thresholds for the invasion or persistence of infectious disease, core concepts of disease ecology, have formed the basis of disease control policies. However, a definitive understanding of population thresholds for a multi-host disease such as PBFD is likely to never be resolved given the large number of potential host species and conceivable parameters which could dynamically influence intra andinterspecific transmission rates, alongside other factors such as abundance of important host reservoir species. Nevertheless, the phylogenetic analysis of BFDV genomes strongly indicates that no one genotype can be considered as more virulentthan another and as such it behaves like a viral quasispecies and host-generalist in the Psittaciformes, with shallow host-based divergence likely reflecting dynamic ranges of interspecific transmission. Increasing evidence supports a post-Gondwanan origin of BFDV in Australian species where the virus now exists as a pathogenic host­ generalist quasipecies capable of flexible host-switching amongst the psittacid avifauna of Australia and there ,is fossil evidence that Cacatua and the budgerigar have likely been present in Australia in their present forms for at least 5 million years. It is theoretically likely that BFDV has circulated as a quasispecies with limited host-based divergence amongst Australian Psittaciformes for at least this period. In contrast there is no strong evidence BFDV endemicity in native New Zealand parrot species prior to human colonisation and the recent detection of PBFD in wild New Zealand birds is explainable by the introduction of this pathogen with the release of infected feral eastern rosellas ( Platycercus eximius) from Australia. A similar scenario almost certainly occurred for the Norfolk Island green parrot.",
author = "Shane Raidal and Subir Sarker and Shubhagata Das and Seyed Ghorashi and Jade Forwood and Andrew Peters",
note = "Imported on 03 May 2017 - DigiTool details were: publisher = 2014. Event dates (773o) = 28 Sep - 2 Oct 2014; Parent title (773t) = Wildlife Disease Association Conference.; Annual Conference of the Wildlife Disease Association - Australasian Section : 2014 WDA-A Conference ; Conference date: 28-09-2014 Through 02-10-2014",
year = "2014",
language = "English",

}

Raidal, S, Sarker, S, Das, S, Ghorashi, S, Forwood, J & Peters, A 2014, 'Updates on Beak and Feather Disease virus' Paper presented at Annual Conference of the Wildlife Disease Association - Australasian Section, Canberra, Australia, 28/09/14 - 02/10/14, .

Updates on Beak and Feather Disease virus. / Raidal, Shane; Sarker, Subir; Das, Shubhagata; Ghorashi, Seyed; Forwood, Jade; Peters, Andrew.

2014. Paper presented at Annual Conference of the Wildlife Disease Association - Australasian Section, Canberra, Australia.

Research output: Other contribution to conferencePresentation only

TY - CONF

T1 - Updates on Beak and Feather Disease virus

AU - Raidal, Shane

AU - Sarker, Subir

AU - Das, Shubhagata

AU - Ghorashi, Seyed

AU - Forwood, Jade

AU - Peters, Andrew

N1 - Imported on 03 May 2017 - DigiTool details were: publisher = 2014. Event dates (773o) = 28 Sep - 2 Oct 2014; Parent title (773t) = Wildlife Disease Association Conference.

PY - 2014

Y1 - 2014

N2 - A focus of recent research into PBFD has been to investigate evolutionary pathways of BFDV in Australasian parrots and cockatoos with the aim to identify potential BFDV clades that might threaten endangered host species. Emerging consensusindicates that Australian parrots are susceptible to a diversity of BFDV clades with no clear association based on host-virus co-speciation. The latest phylogeny of BFDV in parrot species throughout Australia is important for understanding the likely threats to vulnerable and endangered psittacine bird species such as the orange-bellied parrot ( Neophema chrysogaste), wstern ground parrot (Pezoropus flaviventris), swift parrot ( Lathamus disco.for) and regent parrot (Polytelis anthopeplus monarchoides). The latest results indicate that all endangered Australian psittacine bird species are equally likely to be infected by BFDV genotypes from any other close or distantly related host reservoir species. In the context of BFOV in the Australian landscape the involvement of (multiple and unknown alternative host species is a well recognised major confounder for wildlife disease modelling. Host population thresholds for the invasion or persistence of infectious disease, core concepts of disease ecology, have formed the basis of disease control policies. However, a definitive understanding of population thresholds for a multi-host disease such as PBFD is likely to never be resolved given the large number of potential host species and conceivable parameters which could dynamically influence intra andinterspecific transmission rates, alongside other factors such as abundance of important host reservoir species. Nevertheless, the phylogenetic analysis of BFDV genomes strongly indicates that no one genotype can be considered as more virulentthan another and as such it behaves like a viral quasispecies and host-generalist in the Psittaciformes, with shallow host-based divergence likely reflecting dynamic ranges of interspecific transmission. Increasing evidence supports a post-Gondwanan origin of BFDV in Australian species where the virus now exists as a pathogenic host­ generalist quasipecies capable of flexible host-switching amongst the psittacid avifauna of Australia and there ,is fossil evidence that Cacatua and the budgerigar have likely been present in Australia in their present forms for at least 5 million years. It is theoretically likely that BFDV has circulated as a quasispecies with limited host-based divergence amongst Australian Psittaciformes for at least this period. In contrast there is no strong evidence BFDV endemicity in native New Zealand parrot species prior to human colonisation and the recent detection of PBFD in wild New Zealand birds is explainable by the introduction of this pathogen with the release of infected feral eastern rosellas ( Platycercus eximius) from Australia. A similar scenario almost certainly occurred for the Norfolk Island green parrot.

AB - A focus of recent research into PBFD has been to investigate evolutionary pathways of BFDV in Australasian parrots and cockatoos with the aim to identify potential BFDV clades that might threaten endangered host species. Emerging consensusindicates that Australian parrots are susceptible to a diversity of BFDV clades with no clear association based on host-virus co-speciation. The latest phylogeny of BFDV in parrot species throughout Australia is important for understanding the likely threats to vulnerable and endangered psittacine bird species such as the orange-bellied parrot ( Neophema chrysogaste), wstern ground parrot (Pezoropus flaviventris), swift parrot ( Lathamus disco.for) and regent parrot (Polytelis anthopeplus monarchoides). The latest results indicate that all endangered Australian psittacine bird species are equally likely to be infected by BFDV genotypes from any other close or distantly related host reservoir species. In the context of BFOV in the Australian landscape the involvement of (multiple and unknown alternative host species is a well recognised major confounder for wildlife disease modelling. Host population thresholds for the invasion or persistence of infectious disease, core concepts of disease ecology, have formed the basis of disease control policies. However, a definitive understanding of population thresholds for a multi-host disease such as PBFD is likely to never be resolved given the large number of potential host species and conceivable parameters which could dynamically influence intra andinterspecific transmission rates, alongside other factors such as abundance of important host reservoir species. Nevertheless, the phylogenetic analysis of BFDV genomes strongly indicates that no one genotype can be considered as more virulentthan another and as such it behaves like a viral quasispecies and host-generalist in the Psittaciformes, with shallow host-based divergence likely reflecting dynamic ranges of interspecific transmission. Increasing evidence supports a post-Gondwanan origin of BFDV in Australian species where the virus now exists as a pathogenic host­ generalist quasipecies capable of flexible host-switching amongst the psittacid avifauna of Australia and there ,is fossil evidence that Cacatua and the budgerigar have likely been present in Australia in their present forms for at least 5 million years. It is theoretically likely that BFDV has circulated as a quasispecies with limited host-based divergence amongst Australian Psittaciformes for at least this period. In contrast there is no strong evidence BFDV endemicity in native New Zealand parrot species prior to human colonisation and the recent detection of PBFD in wild New Zealand birds is explainable by the introduction of this pathogen with the release of infected feral eastern rosellas ( Platycercus eximius) from Australia. A similar scenario almost certainly occurred for the Norfolk Island green parrot.

M3 - Presentation only

ER -

Raidal S, Sarker S, Das S, Ghorashi S, Forwood J, Peters A. Updates on Beak and Feather Disease virus. 2014. Paper presented at Annual Conference of the Wildlife Disease Association - Australasian Section, Canberra, Australia.