Publications

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a new isolate of beak and feather disease virus from endemic wild red-fronted parakeets (cyanoramphus novaezelandiae) in new zealand.psittacine beak and feather disease (pbfd) is a viral disease distributed worldwide with a potentially critical impact on many rare parrots. while efforts have been made to determine its prevalence in wild and captive psittacines, only limited work has been done to document complete genomes of its causative agent, beak and feather disease virus (bfdv). here, we describe five full genomes of bfdv isolated from wild specimens of an endemic new zealand parrot, the red-fronted parakeet (cyanoramphus ...201020180139
mycobacterium tuberculosis in a red-crowned parakeet (cyanoramphus novaezelandiae).an adult female red-crowned parakeet (cyanoqqqqqus novaezelandieae) was presented for necropsy and histopathologic evaluation. the bird had died after exhibiting lameness, weight loss, respiratory signs, and hemoptysis. postmortem radiographs revealed lesions in the diaphysis of the left femur and soft-tissue opacities in the lungs. at necropsy, the muscles of the left femur were pale and swollen, white-yellow small nodules were visible in lungs and air sacs, and the liver and other coelomic org ...201121657186
emerging infectious disease or evidence of endemicity? a multi-season study of beak and feather disease virus in wild red-crowned parakeets (cyanoramphus novaezelandiae).beak and feather disease virus (bfdv) is a single-stranded dna virus that is the etiological agent of beak and feather disease in both wild and captive parrots. given that bfdv is globally recognized as a conservation threat for wild parrots, between 2011-2013, red-crowned parakeets (cyanoramphus novaezelandiae, n = 229), which are endemic to new zealand, were captured in mist nets on tiritiri matangi island and hauturu-o-toi/little barrier island (lbi), new zealand, for disease surveillance. bl ...201526138559
dna content and distribution in ancient feathers and potential to reconstruct the plumage of extinct avian taxa.feathers are known to contain amplifiable dna at their base (calamus) and have provided an important genetic source from museum specimens. however, feathers in subfossil deposits generally only preserve the upper shaft and feather 'vane' which are thought to be unsuitable for dna analysis. we analyse subfossil moa feathers from holocene new zealand rockshelter sites and demonstrate that both ancient dna and plumage information can be recovered from their upper portion, allowing species identific ...200919570784
knemidokoptinid (epidermoptidae: knemidokoptinae) mite infestation in wild red-crowned parakeets (cyanoramphus novaezelandiae): correlations between macroscopic and microscopic findings.during a study on health and disease in red-crowned parakeets (cyanoramphus novaezelandiae) on tiritiri matangi island and little barrier island (hauturu-o-toi) in new zealand between 2011 and 2013, an outbreak of feather loss prompted the collection of skin biopsies (n = 135) under anesthesia from the head of captured birds. a subset of samples (n = 7) was frozen to obtain whole specimens for identification of ectoparasites. mites (range 1-11) were observed in 79/135 (58.5%) skin biopsies, wher ...201525973626
developmental morphology of knemidokoptes pilae on an infested red-crowned parakeet (cyanoramphus novaezelandiae).a captive 4-year-old female red-crowned parakeet (cyanoramphus novaezelandiae) presented with anorexia, diminished activity and thick, beige, crusted lesions over the cere, legs, wings and cloaca. deep skin scrapings from various lesions identified knemidokoptes pilae as the causative agent. for treatment, the crusts were debrided, and the lesions were topically treated with ivermectin, chlorhexidine and silver sulfadiazine. the parakeet died the day after treatment. previous studies examining k ...201626596465
hybridization increases measures of innate and cell-mediated immunity in an endangered bird species.1. given the increasing threat of 'emerging infectious diseases' (eids), and the vulnerability of small inbred populations to such novel challenges (at least partly through compromised immunity), a degree of interspecific hybridization may improve the viability of endangered species by enriching depauperate gene pools. 2. to investigate this hypothesis, we quantified indicators of the strength of both innate and cell-mediated immunity in wild populations of hybridizing parakeets on the chatham i ...200616638008
molecular characterisation of beak and feather disease virus (bfdv) in new zealand and its implications for managing an infectious disease.beak and feather disease virus (bfdv) infections are often fatal to both captive and wild parrot populations. its recent discovery in a wild population of native red-fronted parakeets has raised concerns for the conservation of native parrots, all of which are threatened or endangered. the question of a recent introduction versus a native genotype of the virus poses different conservation-management challenges, and thus, a clear understanding of the molecular phylogeny of bdfv is a crucial step ...201222638639
comparison of beak and feather disease virus prevalence and immunity-associated genetic diversity over time in an island population of red-crowned parakeets.pathogen outbreaks in the wild can contribute to a population's extinction risk. concern over the effects of pathogen outbreaks in wildlife is amplified in small, threatened populations, where degradation of genetic diversity may hinder natural selection for enhanced immunocompetence. beak and feather disease virus (bfdv) was detected for the first time in an island population of red-crowned parakeets (cyanoramphus novaezelandiae) in 2008 on little barrier island (hauturu-o-toi) of new zealand. ...201626699786
avian paramyxovirus serotype 3 infection in neopsephotus, cyanoramphus, and neophema species.an outbreak of avian paramyxovirus serotype 3 (apmv-3) infection occurred in a private bird collection consisting mainly of neophema species. two bourke's parrots (neopsephotus bourkii) and one red-crowned parakeet (cyanoramphus novaezelandiae) were examined after developing torticollis and circling. the 3 birds were euthanatized and submitted for necropsy. brain and liver samples from the 3 birds were homogenized and inoculated into the allantoic cavity of 10-day-old embryonated specific-pathog ...200919999764
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