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Author Adam Polkinghorne

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Unexpected detection of human parechovirus in infants with suspected meningitis using real-time multiplex PCR.

Harsha Samarasekara, Catherine Janto, Rifky Balgahom, Adam Polkinghorne, James Branley,

Pathology (Pathology)
[2020, 52(4):502-504]

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Molecular detection of Babesia divergens and Mycoplasma wenyonii infection in cattle from Bosnia And Herzegovina.

Oliver Stevanović, Daria Jurković, Adam Polkinghorne, Amna Ćeleš, Tamara Ilić, Sanda Dimitrijević, Drago Nedić, Relja Beck,

We report two cases of bovine babesiosis caused by Babesia divergens in a region of central Bosnia and Herzegovina. The cases were detected in June 2017 and July 2018 from two small backyard farms. Routine clinical assessments, including physical examination and haematology, revealed lethargy, fever, anaemia, leukopenia and haemoglobinuria in ... Read more >>

Parasitol. Res. (Parasitology research)
[2020, 119(4):1423-1427]

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Recent history of psittacosis in Australia: expanding our understanding of the epidemiology of this important globally distributed zoonotic disease.

Adam Polkinghorne, Kathryn M Weston, James Branley,

Psittacosis is a human systemic disease caused by infection with Chlamydia psittaci. Shortly after reports emerged of a global pandemic associated with contact with imported parrots, Australian researchers including Macfarlane Burnet and others demonstrated that C. psittaci was widespread in Australian parrots. Australian cases over the last two decades have ... Read more >>

Intern Med J (Internal medicine journal)
[2020, 50(2):246-249]

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Suspected Materno-Fetal Transmission of Neisseria meningitidis Serogroup W Clonal Complex 11 Causing Early-Onset Neonatal Sepsis.

Timothy Gilbey, Christopher McIver, Ulrike Brandenburg, Emma Goeman, Adam Polkinghorne, Monica Lahra, James Branley,

Open Forum Infect Dis (Open forum infectious diseases)
[2020, 7(2):ofaa039]

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Population‐scale treatment informs solutions for control of environmentally transmitted wildlife disease

Alynn M Martin, Christopher P Burridge, Scott Carver, Tamieka A Fraser, Adam Polkinghorne, Shane A Richards,

Long‐term pathogen control or eradication in wildlife is rare and represents a major challenge in conservation. Control is particularly difficult for environmentally transmitted pathogens, including some of the most conservation‐critical wildlife diseases. We undertook a treatment programme aimed at population‐scale eradication of the environmentally transmitted Sarcoptes scabiei mite (causative agent ... Read more >>

(The Journal of Applied Ecology)
[2019, 56(10):2363-2375]

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Retrospective study of canine infectious haemolytic anaemia cases reveals the importance of molecular investigation in accurate postmortal diagnostic protocols.

Ana Beck, Doroteja Huber, Maja Antolić, Željka Anzulović, Irena Reil, Adam Polkinghorne, Gad Baneth, Relja Beck,

Infectious haemolytic anaemia (IHA) in dogs share similar clinical signs including fever, lethargy, icterus, paleness of mucous membranes and splenomegaly. Postmortal findings are similar and, without additional diagnostic methods, an accurate aetiological diagnosis is difficult to achieve. In order to investigate causes of lethal IHA in Croatian dogs, we performed ... Read more >>

Comp. Immunol. Microbiol. Infect. Dis. (Comparative immunology, microbiology and infectious diseases)
[2019, 65:81-87]

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Prevalence and clinical significance of koala retrovirus in two South Australian koala (Phascolarctos cinereus) populations.

Jessica Fabijan, Darren Miller, Olusola Olagoke, Lucy Woolford, Wayne Boardman, Peter Timms, Adam Polkinghorne, Greg Simmons, Farhid Hemmatzadeh, Darren J Trott, K Natasha Speight,

PURPOSE:Koala retrovirus (KoRV-A) is 100  % prevalent in northern Australian (Queensland and New South Wales) koala populations, where KoRV-B has been associated with Chlamydia pecorum disease and the development of lymphosarcoma. In southern populations (Victoria and South Australia), KoRV-A is less prevalent and KoRV-B has not been detected in Victoria, ... Read more >>

J. Med. Microbiol. (Journal of medical microbiology)
[2019, 68(7):1072-1080]

Cited: 1 time

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Chlamydia pecorum prevalence in South Australian koala (Phascolarctos cinereus) populations: Identification and modelling of a population free from infection.

Jessica Fabijan, Charles Caraguel, Martina Jelocnik, Adam Polkinghorne, Wayne S J Boardman, Elisa Nishimoto, Greg Johnsson, Robyn Molsher, Lucy Woolford, Peter Timms, Greg Simmons, Farhid Hemmatzadeh, Darren J Trott, Natasha Speight,

Chlamydia pecorum is an established and prevalent infection that produces severe clinical disease in many koala populations, contributing to dramatic population declines. In wild South Australian koala populations, C. pecorum occurrence and distribution is unknown. Here, C. pecorum-specific real-time quantitative PCR (qPCR) was applied to ocular and urogenital swabs from ... Read more >>

Sci Rep (Scientific reports)
[2019, 9(1):6261]

Cited: 1 time

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Detection of a range of genetically diverse chlamydiae in Australian domesticated and wild ungulates.

Martina Jelocnik, Alyce Taylor-Brown, Christian O'Dea, Susan Anstey, Sankhya Bommana, Nicole Masters, Mohamad Katouli, Cheryl Jenkins, Adam Polkinghorne, Adam Polkinghorne,

Chlamydiae are globally widespread obligate intracellular bacteria, which several species are a well-recognized threat to human and animal health. In Australia, the most successful chlamydial species are the infamous koala pathogen C. pecorum, and C. psittaci, an emerging pathogen associated with zoonotic events. Little is known about infections caused by other chlamydial ... Read more >>

Transbound Emerg Dis (Transboundary and emerging diseases)
[2019, 66(3):1132-1137]

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The limitations of commercial serological assays for detection of chlamydial infections in Australian livestock.

Sankhya Bommana, Martina Jelocnik, Nicole Borel, Ian Marsh, Scott Carver, Adam Polkinghorne,

Chlamydia pecorum and Chlamydia abortus are related ruminant pathogens endemic to different global regions. Potential co-infections combined with the lack of species-specific serological assays challenge accurate diagnosis. Serological screening revealed low C. abortus seropositivity with the peptide-based ELISA (1/84; 1.2%) in Australian sheep yet moderate seropositivity in a Swiss flock ... Read more >>

J. Med. Microbiol. (Journal of medical microbiology)
[2019, 68(4):627-632]

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In vitro analysis of genetically distinct Chlamydia pecorum isolates reveals key growth differences in mammalian epithelial and immune cells.

Md Mominul Islam, Martina Jelocnik, Susan Anstey, Bernhard Kaltenboeck, Nicole Borel, Peter Timms, Adam Polkinghorne,

Chlamydia (C.) pecorum is an obligate intracellular bacterium that infects and causes disease in a broad range of animal hosts. Molecular studies have revealed that this pathogen is genetically diverse with certain isolates linked to different disease outcomes. Limited in vitro or in vivo data exist to support these observations, ... Read more >>

Vet. Microbiol. (Veterinary microbiology)
[2019, 232:22-29]

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Isolation, marine transgression and translocation of the bare-nosed wombat (Vombatus ursinus).

Alynn Martin, Scott Carver, Kirstin Proft, Tamieka A Fraser, Adam Polkinghorne, Sam Banks, Christopher P Burridge,

Island populations can represent genetically distinct and evolutionarily important lineages relative to mainland conspecifics. However, phenotypic divergence of island populations does not necessarily reflect genetic divergence, particularly for lineages inhabiting islands periodically connected during Pleistocene low sea stands. Marine barriers may also not be solely responsible for any divergence that ... Read more >>

Evol Appl (Evolutionary applications)
[2019, 12(6):1114-1123]

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Mini Review: Antimicrobial Control of Chlamydial Infections in Animals: Current Practices and Issues.

Sankhya Bommana, Adam Polkinghorne,

Chlamydia are a genus of successful obligate intracellular pathogens spread across humans, wildlife, and domesticated animals. The most common species reported in livestock in this genus are Chlamydia abortus, Chlamydia psittaci, Chlamydia suis, and Chlamydia pecorum. Chlamydial infections trigger a series of inflammatory disease-related sequelae including arthritis, conjunctivitis, pneumonia, and ... Read more >>

Front Microbiol (Frontiers in microbiology)
[2019, 10:113]

Cited: 2 times

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Identification of a Novel Picorna-Like Virus, Burpengary Virus, That Is Negatively Associated with Chlamydial Disease in the Koala

Erin Harvey, Danielle Madden, Adam Polkinghorne, Edward Holmes,

Koalas (Phascolarctos cinereus) are native Australian marsupials whose populations are in decline from a range of threats. Infectious diseases caused by the bacterium Chlamydia pecorum and other pathogens are of particular concern. We analysed 26 poly-A selected RNA-sequencing libraries from a data set designed to study the immune response of ... Read more >>

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Multilocus Sequence Typing (MLST) of Chlamydiales.

Martina Jelocnik, Adam Polkinghorne, Yvonne Pannekoek,

Developed two decades ago as a molecular method to provide definite characterization of a bacterial isolate, Multilocus Sequence Typing (MLST) is today globally adopted as a universal fine-detailed molecular typing tool and has been applied to numerous pathogenic and nonpathogenic bacterial as well eukaryotic organisms. MLST utilizes DNA sequence of ... Read more >>

Methods Mol. Biol. (Methods in molecular biology (Clifton, N.J.))
[2019, 2042:69-86]

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Seroprevalence of vector-borne pathogens in dogs from Croatia.

Daria Jurković, Ana Beck, Doroteja Huber, Željko Mihaljević, Adam Polkinghorne, Franjo Martinković, Damir Lukačević, Miroslav Pilat, Renata Brezak, Sanja Bosnić, Relja Beck,

Canine vector-borne pathogens (VBPs) are a group of globally distributed and rapidly spreading microorganisms transmitted by arthropods. In the present survey, we investigated Anaplasma spp., Ehrlichia canis, Dirofilaria immitis and Borrelia burgdorferi sensu lato seroprevalence between three groups of dogs (asymptomatic, suspected and deceased) from continental and coastal regions of ... Read more >>

Parasitol. Res. (Parasitology research)
[2019, 118(1):347-352]

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Chlamydia pecorum gastrointestinal tract infection associations with urogenital tract infections in the koala (Phascolarctos cinereus).

Samuel Phillips, Amy Robbins, Joanne Loader, Jonathan Hanger, Rosemary Booth, Martina Jelocnik, Adam Polkinghorne, Peter Timms,

BACKGROUND:Chlamydia infects multiple sites within hosts, including the gastrointestinal tract (GIT). In certain hosts, gastrointestinal infection is linked to treatment avoidance and self-infection at disease susceptible sites. GIT C. pecorum has been detected in livestock and koalas, however GIT prevalence rates within the koala are yet to be established. METHODS:Paired ... Read more >>

PLoS ONE (PloS one)
[2018, 13(11):e0206471]

Cited: 3 times

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The impact of human activities on Australian wildlife

Alyce Taylor-Brown, Rosie Booth, Amber Gillett, Erica Mealy, Steven Ogbourne, Adam Polkinghorne, Gabriel Conroy,

Abstract Increasing human population size and the concomitant expansion of urbanisation significantly impact natural ecosystems and native fauna globally. Successful conservation management relies on precise information on the factors associated with wildlife population decline, which are challenging to acquire from natural populations. Wildlife Rehabilitation Centres (WRC) provide a rich source ... Read more >>

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Metagenomic Analysis of Fish-Associated Ca. Parilichlamydiaceae Reveals Striking Metabolic Similarities to the Terrestrial Chlamydiaceae.

Alyce Taylor-Brown, Trestan Pillonel, Gilbert Greub, Lloyd Vaughan, Barbara Nowak, Adam Polkinghorne,

Chlamydiae are an example of obligate intracellular bacteria that possess highly reduced, compact genomes (1.0-3.5 Mbp), reflective of their abilities to sequester many essential nutrients from the host that they no longer need to synthesize themselves. The Chlamydiae is a phylum with a very wide host range spanning mammals, birds, fish, ... Read more >>

Genome Biol Evol (Genome biology and evolution)
[2018, 10(10):2587-2595]

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Expanded Molecular Typing of Sarcoptes scabiei Provides Further Evidence of Disease Spillover Events in the Epidemiology of Sarcoptic Mange in Australian Marsupials.

Tamieka A Fraser, Roz Holme, Alynn Martin, Pam Whiteley, Merridy Montarello, Cam Raw, Scott Carver, Adam Polkinghorne,

The invasive ectoparasite Sarcoptes scabiei affects the welfare and conservation of Australian marsupials. Molecular data suggest that spillover from other hosts may be responsible for the emergence of this infectious disease, but the scale of such studies is limited. We performed expanded molecular typing of the S. scabiei mitochondrial cox1 ... Read more >>

J. Wildl. Dis. (Journal of wildlife diseases)
[2019, 55(1):231-237]

Cited: 1 time

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A Sarcoptes scabiei specific isothermal amplification assay for detection of this important ectoparasite of wombats and other animals.

Tamieka A Fraser, Scott Carver, Alynn M Martin, Kate Mounsey, Adam Polkinghorne, Martina Jelocnik,

The globally distributed epidermal ectoparasite, Sarcoptes scabiei, is a serious health and welfare burden to at-risk human and animal populations. Rapid and sensitive detection of S. scabiei infestation is critical for intervention strategies. While direct microscopy of skin scrapings is a widely utilised diagnostic method, it has low sensitivity. PCR, ... Read more >>

PeerJ (PeerJ)
[2018, 6:e5291]

Cited: 1 time

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Cloacal and Ocular Microbiota of the Endangered Australian Northern Quoll.

Catherine Burke, Delaney Burnard, Adam Polkinghorne, Jonathan Webb, Wilhelmina M Huston,

The Australian northern quoll is an important predatory marsupial carnivore that is currently endangered due to inappropriate fire regimes, predation, and the spread of invasive cane toads. The microbiota of Australian marsupials has not been extensively studied, but is thought to play a role in their health. This study provides ... Read more >>

Microorganisms (Microorganisms)
[2018, 6(3):]

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Adaptation and conservation insights from the koala genome.

Rebecca N Johnson, Denis O'Meally, Zhiliang Chen, Graham J Etherington, Simon Y W Ho, Will J Nash, Catherine E Grueber, Yuanyuan Cheng, Camilla M Whittington, Siobhan Dennison, Emma Peel, Wilfried Haerty, Rachel J O'Neill, Don Colgan, Tonia L Russell, David E Alquezar-Planas, Val Attenbrow, Jason G Bragg, Parice A Brandies, Amanda Yoon-Yee Chong, Janine E Deakin, Federica Di Palma, Zachary Duda, Mark D B Eldridge, Kyle M Ewart, Carolyn J Hogg, Greta J Frankham, Arthur Georges, Amber K Gillett, Merran Govendir, Alex D Greenwood, Takashi Hayakawa, Kristofer M Helgen, Matthew Hobbs, Clare E Holleley, Thomas N Heider, Elizabeth A Jones, Andrew King, Danielle Madden, Jennifer A Marshall Graves, Katrina M Morris, Linda E Neaves, Hardip R Patel, Adam Polkinghorne, Marilyn B Renfree, Charles Robin, Ryan Salinas, Kyriakos Tsangaras, Paul D Waters, Shafagh A Waters, Belinda Wright, Marc R Wilkins, Peter Timms, Katherine Belov,

The koala, the only extant species of the marsupial family Phascolarctidae, is classified as 'vulnerable' due to habitat loss and widespread disease. We sequenced the koala genome, producing a complete and contiguous marsupial reference genome, including centromeres. We reveal that the koala's ability to detoxify eucalypt foliage may be due ... Read more >>

Nat. Genet. (Nature genetics)
[2018, 50(8):1102-1111]

Cited: 16 times

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Epitheliocystis in fish: An emerging aquaculture disease with a global impact.

Makeely Isabel Blandford, Alyce Taylor-Brown, Thomas A Schlacher, Barbara Nowak, Adam Polkinghorne, Adam Polkinghorne,

Epitheliocystis is a skin and gill disease in fish caused by pathogenic intracellular bacteria. The disease has been reported in at least 90 species of marine and freshwater fish in both the southern and northern hemispheres. It affects a number of commercially important aquaculture species, including salmon, kingfish and bream. ... Read more >>

Transbound Emerg Dis (Transboundary and emerging diseases)
[2018, 65(6):1436-1446]

Cited: 1 time

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Characterization of the In Vitro Chlamydia pecorum Response to Gamma Interferon.

M Mominul Islam, Martina Jelocnik, Wilhelmina M Huston, Peter Timms, Adam Polkinghorne,

Chlamydia pecorum is an important intracellular bacterium that causes a range of diseases in animals, including a native Australian marsupial, the koala. In humans and animals, a gamma interferon (IFN-γ)-mediated immune response is important for the control of intracellular bacteria. The present study tested the hypotheses that C. pecorum can ... Read more >>

Infect. Immun. (Infection and immunity)
[2018, 86(4):]

Cited: 2 times

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