Lymphoma was diagnosed in two wild tawny frogmouths (Podargus strigoides) presented to the Australian Wildlife Health Centre, Healesville Sanctuary, Victoria. The first case presented with extensive feather loss refractory to treatment. Bacterial and fungal folliculitis and beak and feather disease virus were excluded as primary causes, and the bird was euthanised due to poor response to treatment.
View Article and Find Full Text PDFElectric-field noise due to surfaces disturbs the motion of nearby trapped ions, compromising the fidelity of gate operations that are the basis for quantum computing algorithms. We present a method that predicts the effect of dielectric materials on the ion's motion. Such dielectrics are integral components of ion traps.
View Article and Find Full Text PDFWe present the design and construction of a new experimental apparatus for the trapping of single Ba ions in the center of curvature of an optical-quality hemispherical mirror. We describe the layout, fabrication, and integration of the full setup, consisting of a high-optical access monolithic "3D-printed" Paul trap, the hemispherical mirror, a diffraction-limited in-vacuum lens (NA = 0.7) for collection of atomic fluorescence, and a state-of-the art ultra-high vacuum vessel.
View Article and Find Full Text PDFInt J Parasitol Parasites Wildl
December 2020
This is the first report of a disseminated protozoal infection in a wild feathertail glider () from south-eastern Australia. The glider was found dead in poor body condition. Histologically, large numbers of zoites were seen predominantly in macrophages in the liver, spleen and lung, with protozoal cysts present in the liver.
View Article and Find Full Text PDFDetermining the causes of mortality in endangered species is essential to understanding the possible reasons behind their decline and to facilitating the implementation of mitigating steps. The southern bent-winged bat () is a critically endangered Australian bat whose population numbers have decreased over the past 50 years. As part of a larger investigation to determine if disease could be a contributing factor to the decline, 27 southern bent-winged bats and one closely related eastern bent-winged bat () that died during the study were necropsied and examined histologically.
View Article and Find Full Text PDFImaging fluorescence analysis is a powerful tool for the characterization of thin functional layers. Due to the development of new components such as cost-efficient and long life diode lasers and LEDs as well as sensitive cameras, the number of industrial in situ sensors based on fluorescence analysis technology increased rapidly in recent years. Of crucial importance for all these new sensors are efficient and robust methods for calibration.
View Article and Find Full Text PDFReptile kidneys maintain a constant extracellular environment within the body. They excrete waste products, maintain normal concentrations of salt and water, regulate acid-base balance, and produce hormones and vitamins. The kidneys contain nephrons consisting of glomeruli designed to filter the plasma, Bowman capsules that collect the filtrate, and tubules that resorb most of the filtered water and nutrients while excreting waste metabolites.
View Article and Find Full Text PDFImaging fluorescence spectroscopy proves to be a fast and sensitive method for measuring the thickness of thin coatings in the manufacturing industry. This encouraged us to systematically study, theoretically and experimentally, parameters that influence the fluorescence of thin layers. We analyzed the fluorescence signal as a function of the scattering and reflectance properties of the sample substrate.
View Article and Find Full Text PDFAim: Postoperative pain remains a major factor in recovery from colorectal resection. There is increasing interest in opioid-sparing analgesia, and intraperitoneal local anaesthetic (IPLA) has recently been shown to be useful in minor laparoscopic and open colorectal procedures. The aim of this study was to evaluate the impact of IPLA on functional recovery following major laparoscopic surgery.
View Article and Find Full Text PDFWhile bats are often viewed as carriers of infectious disease agents, little research has been conducted on the effects these pathogens may have on the bat populations themselves. The southern bent-winged bat () is a critically endangered subspecies endemic to south-eastern Australia. Population numbers of this bat have declined over the past 50 years, but the reasons for this are unclear.
View Article and Find Full Text PDFInt J Parasitol Parasites Wildl
December 2018
While bats carry a diverse range of ectoparasites, little research has been conducted on the effects these organisms may have on bat populations. The southern bent-winged bat () is a critically endangered subspecies endemic to south-eastern Australia, whose numbers have declined over the past 50 years for unknown reasons. As part of a larger study to investigate the potential role of disease in these declines, southern bent-winged bats from four locations were captured and examined for the presence of bat flies, mites, ticks and the nematode (previously associated with skin nodules in bent-winged bats).
View Article and Find Full Text PDFThe posttranslational modification (PTM) of tubulin subunits is important for the physiological functions of the microtubule (MT) cytoskeleton. Although major advances have been made in the identification of enzymes carrying out MT-PTMs, little knowledge is available on how intercellular signaling molecules and their associated pathways regulate MT-PTM-dependent processes inside signal-receiving cells. Here we show that Hedgehog (Hh) signaling, a paradigmatic intercellular signaling system, affects the MT acetylation state in mammalian cells.
View Article and Find Full Text PDFFungi are increasingly being documented as causing disease in a wide range of faunal species, including Pseudogymnoascus destructans, the fungus responsible for white nose syndrome which is having a devastating impact on bats in North America. The population size of the Australian southern bent-winged bat (Miniopterus orianae bassanii), a critically endangered subspecies, has declined over the past 50 years. As part of a larger study to determine whether disease could be a contributing factor to this decline, southern bent-winged bats were tested for the presence of a range of potentially pathogenic fungi: P.
View Article and Find Full Text PDFWhile bats are often viewed as carriers of infectious disease agents, little research has been conducted on the effects these potential pathogens may have on the bat populations themselves. The southern bent-winged bat (Miniopterus orianae bassanii) is a critically endangered subspecies endemic to south-eastern Australia. Population numbers of this bat have been declining for the past 50 years, but the reasons for this are unclear.
View Article and Find Full Text PDFBackground: Adequate post-operative analgesia is essential for recovery following abdominal surgery. Abdominal wall nerve blocks have been shown to be beneficial in this respect following surgery. The purpose of this trial was to examine the efficacy of infusional versus intermittent bolus delivery of abdominal wall blocks in patients undergoing abdominal resectional gastrointestinal surgery.
View Article and Find Full Text PDFColumbid herpesvirus-1 (CoHV-1) is widespread in feral pigeons in North America and Europe. We used a PCR assay to detect CoHV-1 DNA in oral and cloacal tissues and oral swabs from naturally infected pigeons. Fifty-three feral pigeons from five flocks in Australia (n=3 from south-central Victoria and n=2 from Sydney) were examined for CoHV-1 DNA.
View Article and Find Full Text PDFThe Down syndrome-associated DYRK1A kinase has been reported as a stimulator of the developmentally important Hedgehog (Hh) pathway, but cells from Down syndrome patients paradoxically display reduced Hh signalling activity. Here we find that DYRK1A stimulates GLI transcription factor activity through phosphorylation of general nuclear localization clusters. In contrast, in vivo and in vitro experiments reveal that DYRK1A kinase can also function as an inhibitor of endogenous Hh signalling by negatively regulating ABLIM proteins, the actin cytoskeleton and the transcriptional co-activator MKL1 (MAL).
View Article and Find Full Text PDFCase Report: Mortality of northern corroboree frog tadpoles and eggs occurred in association with Tetrahymena-like ciliates. The predominant lesions in the tadpoles were inflammation and necrosis of the dermis and skeletal muscle. Some of the egg capsules also contained ciliates, but were overgrown with bacteria and fungi.
View Article and Find Full Text PDFIntroduction: Adequate postoperative analgesia is essential for recovery following colorectal surgery. Transversus abdominis plane (TAP) blocks have been found to be beneficial in improving pain following a variety of abdominal operations. The objective of this study was to determine if TAP blocks are useful in improving postoperative recovery following laparoscopic colorectal surgery.
View Article and Find Full Text PDFUncontrolled Hedgehog (Hh) signaling is the cause of several malignancies, including the pediatric cancer medulloblastoma, a neuroectodermal tumor affecting the cerebellum. Despite the development of potent Hh pathway antagonists, medulloblastoma drug resistance is still an unresolved issue that requires the identification of novel drug targets. Following up on our observation that histone deacetylase 6 (HDAC6) expression was increased in Hh-driven medulloblastoma, we found that this enzyme is essential for full Hh pathway activation.
View Article and Find Full Text PDFSixty (19 male, 41 female) free-ranging adult eastern bettongs (Bettongia gaimardi) were captured in Tasmania and translocated to the Australian Capital Territory between July 2011 and September 2012 for reintroduction into fenced, predator-proof reserves. The bettongs were anesthetized for physical examination and screened for selected diseases during translocation. Reference ranges for hematologic and biochemical parameters were determined.
View Article and Find Full Text PDFThe tumor suppressor p53 is a central regulatory molecule of apoptosis and is commonly mutated in tumors. Kaposi's sarcoma-associated herpesvirus (KSHV)-related malignancies express wild-type p53. Accordingly, KSHV encodes proteins that counteract the cell death-inducing effects of p53.
View Article and Find Full Text PDFBiochim Biophys Acta
February 2014
O-GlcNAcylation is an inducible, highly dynamic and reversible posttranslational modification, which regulates numerous cellular processes such as gene expression, translation, immune reactions, protein degradation, protein-protein interaction, apoptosis, and signal transduction. In contrast to N-linked glycosylation, O-GlcNAcylation does not display a strict amino acid consensus sequence, although serine or threonine residues flanked by proline and valine are preferred sites of O-GlcNAcylation. Based on this information, computational prediction tools of O-GlcNAc sites have been developed.
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