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https://www.readbyqxmd.com/read/29669478/development-of-an-indirect-elisa-for-detection-of-antibody-to-wobbly-possum-disease-virus-in-archival-sera-of-australian-brushtail-possums-trichosurus-vulpecula-in-new-zealand
#1
J Giles, W Johnson, G Jones, C Heuer, M Dunowska
AIMS: To develop an indirect ELISA based on recombinant nucleocapsid (rN) protein of wobbly possum disease (WPD) virus for investigation of the presence of WPD virus in Australian brushtail possums (Trichosurus vulpecula) in New Zealand. METHODS: Pre- and post-infection sera (n=15 and 16, respectively) obtained from a previous experimental challenge study were used for ELISA development. Sera were characterised as positive or negative for antibody to WPD virus based on western-blot using WPD virus rN protein as antigen...
April 18, 2018: New Zealand Veterinary Journal
https://www.readbyqxmd.com/read/29243855/non-invasive-placentation-in-the-marsupials-macropus-eugenii-macropodidae-and-trichosurus-vulpecula-phalangeridae-involves-redistribution-of-uterine-desmoglein-2
#2
Melanie K Laird, Hanon McShea, Christopher R Murphy, Bronwyn M McAllan, Geoff Shaw, Marilyn B Renfree, Michael B Thompson
In mammalian pregnancy, the uterus is remodeled to become receptive to embryonic implantation. Since non-invasive placentation in marsupials is likely derived from invasive placentation, and is underpinned by intra-uterine conflict between mother and embryo, species with non-invasive placentation may employ a variety of molecular mechanisms to maintain an intact uterine epithelium and to prevent embryonic invasion. Identifying such modifications to the uterine epithelium of marsupial species with non-invasive placentation is key to understanding how conflict is mediated during pregnancy in different mammalian groups...
January 2018: Molecular Reproduction and Development
https://www.readbyqxmd.com/read/29234116/the-response-of-an-arboreal-mammal-to-livestock-grazing-is-habitat-dependant
#3
Heather Neilly, Lin Schwarzkopf
Inappropriate livestock grazing is implicated in the decline of vertebrate fauna species globally. Faunal responses to grazing can interact with the vegetation community in which they occur. We measured the response of an arboreal marsupial, the common brushtail possum (Trichosurus vulpecula vulpecula) to different cattle grazing strategies and vegetation types, and examined whether micro-habitat selection is driving this response. We hypothesised that where arboreal habitat is intact, brushtail possums would be resistant to the impacts of heavy grazing...
December 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29209932/intraspecific-variation-in-nutritional-composition-affects-the-leaf-age-preferences-of-a-mammalian-herbivore
#4
Karen J Marsh, Jessica Ward, Ian R Wallis, William J Foley
Ecologists have long been interested in how the nutritional composition of leaves changes as they age, and whether this affects herbivore feeding preferences. As a consequence, the literature abounds with reports that younger leaves contain higher concentrations of nitrogen and plant secondary metabolites (PSMs) than do older leaves. Most of these studies, however, base their conclusions on average values that often mean little to herbivores. We examined this issue in the well-studied marsupial-eucalypt system, using Eucalyptus melliodora and captive common brushtail possums (Trichosurus vulpecula) offered branches from individual trees containing both young and mature leaves...
January 2018: Journal of Chemical Ecology
https://www.readbyqxmd.com/read/29162213/composition-of-marsupial-zona-pellucida-a-molecular-and-phylogenetic-approach
#5
Carla Moros-Nicolás, Pascale Chevret, María José Izquierdo-Rico, William V Holt, Daniela Esteban-Díaz, Manel López-Béjar, Eva Martínez-Nevado, Maria A Nilsson, José Ballesta, Manuel Avilés
The zona pellucida (ZP) is an extracellular matrix that surrounds mammalian oocytes. In eutherians it is formed from three or four proteins (ZP1, ZP2, ZP3, ZP4). In the few marsupials that have been studied, however, only three of these have been characterised (ZP2, ZP3, ZP4). Nevertheless, the composition in marsupials may be more complex, since a duplication of the ZP3 gene was recently described in one species. The aim of this work was to elucidate the ZP composition in marsupials and relate it to the evolution of the ZP gene family...
November 22, 2017: Reproduction, Fertility, and Development
https://www.readbyqxmd.com/read/29157368/livestock-as-sentinels-for-an-infectious-disease-in-a-sympatric-or-adjacent-living-wildlife-reservoir-host
#6
D P Anderson, A M Gormley, M Bosson, P G Livingstone, G Nugent
A central question to address in managing wildlife diseases is how much effort and resources are required to reduce infection prevalence to below a requisite threshold? This requires surveillance for infection in at least one species involved in the infection cycle, a process that is often expensive and time-consuming but one which could be enhanced using additional sources of readily-obtainable surveillance data. We demonstrate how surveillance data from ruminant livestock monitored for bovine tuberculosis (bTB) in New Zealand can be employed in spatially-explicit modelling to help predict the probability of freedom from Mycobacterium bovis infection in a sympatric wildlife reservoir species, the brushtail possum (Trichosurus vulpecula)...
December 1, 2017: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/28888636/efficacy-of-oral-bcg-vaccination-in-protecting-free-ranging-cattle-from-natural-infection-by-mycobacterium-bovis
#7
Graham Nugent, Ivor J Yockney, Jackie Whitford, Frank E Aldwell, Bryce M Buddle
Vaccination of cattle against bovine tuberculosis could be a valuable control strategy, particularly in countries faced with intractable ongoing infection from a disease reservoir in wildlife. A field vaccination trial was undertaken in New Zealand. The trial included 1286 effectively free-ranging cattle stocked at low densities in a remote 7600ha area, with 55% of them vaccinated using Mycobacterium bovis BCG (Danish strain 1311). Vaccine was administered orally in all but 34 cases (where it was injected)...
September 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28472147/surface-reflectance-drives-nest-box-temperature-profiles-and-thermal-suitability-for-target-wildlife
#8
Stephen R Griffiths, Jessica A Rowland, Natalie J Briscoe, Pia E Lentini, Kathrine A Handasyde, Linda F Lumsden, Kylie A Robert
Thermal properties of tree hollows play a major role in survival and reproduction of hollow-dependent fauna. Artificial hollows (nest boxes) are increasingly being used to supplement the loss of natural hollows; however, the factors that drive nest box thermal profiles have received surprisingly little attention. We investigated how differences in surface reflectance influenced temperature profiles of nest boxes painted three different colors (dark-green, light-green, and white: total solar reflectance 5.9%, 64...
2017: PloS One
https://www.readbyqxmd.com/read/28408215/prevalence-genetic-diversity-and-potential-clinical-impact-of-blood-borne-and-enteric-protozoan-parasites-in-native-mammals-from-northern-australia
#9
Amanda Barbosa, Andrea Reiss, Bethany Jackson, Kristin Warren, Andrea Paparini, Graeme Gillespie, Danielle Stokeld, Peter Irwin, Una Ryan
A molecular survey was conducted to provide baseline information on the prevalence, genetic diversity and potential clinical impacts of blood-borne and enteric protozoans in native wild mammals from the Northern Territory (NT). A total of 209 blood and 167 faecal samples were collected from four target species; the northern brown bandicoot (Isoodon macrourus), common brushtail possum (Trichosurus vulpecula), northern quoll (Dasyurus hallucatus) and brush-tailed rabbit-rat (Conilurus penicillatus). Blood samples were screened by PCR at the 18S rRNA gene for trypanosomes, piroplasms and haemogregarines, with faecal samples tested for Cryptosporidium spp...
April 30, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28397980/uterine-remodelling-during-pregnancy-and-pseudopregnancy-in-the-brushtail-possum-trichosurus-vulpecula-phalangeridae
#10
Melanie K Laird, Hanon McShea, Bronwyn M McAllan, Christopher R Murphy, Michael B Thompson
The formation of a placenta is critical for successful mammalian pregnancy and requires remodelling of the uterine epithelium. In eutherian mammals, remodelling involves specific morphological changes that often correlate with the mode of embryonic attachment. Given the differences between marsupial and eutherian placentae, formation of a marsupial placenta may involve patterns of uterine remodelling that are different from those in eutherians. Here we present a detailed morphological study of the uterus of the brushtail possum (Trichosurus vulpecula; Phalangeridae) throughout pregnancy, using both scanning and transmission electron microscopy, to identify whether uterine changes in marsupials correlate with mode of embryonic attachment as they do in eutherian mammals...
April 11, 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/28391623/cost-based-optimization-of-the-stopping-threshold-for-local-disease-surveillance-during-progressive-eradication-of-tuberculosis-from-new-zealand-wildlife
#11
A M Gormley, D P Anderson, G Nugent
Bovine tuberculosis (TB) is managed in New Zealand largely via population reduction of the major wildlife disease reservoir of Mycobacterium bovis, the introduced brushtail possum Trichosurus vulpecula. New Zealand aims to eradicate M. bovis infection from its livestock and wildlife within 40 years, as the culmination of progressive regional eradication programmes. Declarations of regional eradication are decided after extensive possum population control and post-control surveillance; hence, we developed a modelling framework, based on eco-epidemiological simulation data, to provide cost-evaluated options for deciding when to make these declarations...
February 2018: Transboundary and Emerging Diseases
https://www.readbyqxmd.com/read/28247055/camp-dependent-secretagogues-stimulate-the-nahco-3-cotransporter-in-the-villous-epithelium-of-the-brushtail-possum-trichosurus-vulpecula
#12
Pin-Chun Chao, A Grant Butt
In the ileum of the brushtail possum, Trichosurus vulpecula, fluid secretion appears to be driven by electrogenic HCO3 - secretion. Consistent with this, the cystic fibrosis transmembrane conductance regulator is expressed in the apical membrane of the ileal epithelial cells and the pancreatic or secretory variant of the NaHCO3 cotransporter in the basolateral membrane. This suggests that in the possum ileum, electrogenic HCO3 - secretion is driven by basolateral NaHCO3 cotransporter (NBC) activity. To determine if the NBC contributes to HCO3 - secretion in the possum ileum, intracellular pH (pHi) measurements in isolated villi were used to demonstrate NBC activity in the ileal epithelial cells and investigate the effect of cAMP-dependent secretagogues...
October 2017: Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology
https://www.readbyqxmd.com/read/28209138/using-whole-genome-sequencing-to-investigate-transmission-in-a-multi-host-system-bovine-tuberculosis-in-new-zealand
#13
Joseph Crispell, Ruth N Zadoks, Simon R Harris, Brent Paterson, Desmond M Collins, Geoffrey W de-Lisle, Paul Livingstone, Mark A Neill, Roman Biek, Samantha J Lycett, Rowland R Kao, Marian Price-Carter
BACKGROUND: Bovine tuberculosis (bTB), caused by Mycobacterium bovis, is an important livestock disease raising public health and economic concerns around the world. In New Zealand, a number of wildlife species are implicated in the spread and persistence of bTB in cattle populations, most notably the brushtail possum (Trichosurus vulpecula). Whole Genome Sequenced (WGS) M. bovis isolates sourced from infected cattle and wildlife across New Zealand were analysed. Bayesian phylogenetic analyses were conducted to estimate the substitution rate of the sampled population and investigate the role of wildlife...
February 16, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28173840/morphological-and-molecular-description-of-ixodes-woyliei-n-sp-ixodidae-with-consideration-for-co-extinction-with-its-critically-endangered-marsupial-host
#14
Amanda Ash, Aileen Elliot, Stephanie Godfrey, Halina Burmej, Mohammad Yazid Abdad, Amy Northover, Adrian Wayne, Keith Morris, Peta Clode, Alan Lymbery, R C Andrew Thompson
BACKGROUND: Taxonomic identification of ticks obtained during a longitudinal survey of the critically endangered marsupial, Bettongia penicillata Gray, 1837 (woylie, brush-tailed bettong) revealed a new species of Ixodes Latrielle, 1795. Here we provide morphological data for the female and nymphal life stages of this novel species (Ixodes woyliei n. sp.), in combination with molecular characterisation using the mitochondrial cytochrome c oxidase subunit 1 gene (cox1). In addition, molecular characterisation was conducted on several described Ixodes species and used to provide phylogenetic context...
February 7, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28012389/valuing-conservation-benefits-of-disease-control-in-wildlife-a-choice-experiment-approach-to-bovine-tuberculosis-management-in-new-zealand-s-native-forests
#15
Peter Tait, Caroline Saunders, Graham Nugent, Paul Rutherford
We assess the non-monetary environmental benefits that accrue incidentally in New Zealand (NZ) from pest management conducted primarily to control an animal disease, bovine tuberculosis (TB). TB is an infectious disease that is one of the world's most serious animal health problems and, in many parts of the developing world, still a major mortality risk for humans. The incidence of TB in New Zealand (NZ) farmed livestock has been reduced progressively over the last 20 years, largely due to extensive and sustained population control of the main wildlife reservoir of disease, the introduced brushtail possum...
March 15, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/27927910/validation-of-various-parasite-detection-tests-for-use-in-the-australian-marsupials-quenda-isoodon-obesulus-and-brushtail-possums-trichosurus-vulpecula
#16
Alison E Hillman, Amanda L Ash, Amanda R Kristancic, Aileen D Elliot, Alan J Lymbery, Ian D Robertson, R C Andrew Thompson
We aimed to validate the use of 1) the modified agglutination test and a polymerase chain reaction (PCR) protocol in detecting Toxoplasma gondii infection in quenda ( Isoodon obesulus) and brushtail possums ( Trichosurus vulpecula); 2) immunofluorescence microscopy of feces and a PCR and sequencing protocol in detecting Giardia spp. infection in quenda; and 3) a fecal flotation protocol in detecting gastrointestinal helminth infections of quenda. Quenda and brushtail possum carcasses, and samples from trapped quenda, were tested with 2 parasite detection tests per parasite, and results were modeled using Bayesian latent class analysis to estimate test sensitivity and specificity...
January 2017: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/27893793/field-trial-of-an-aerially-distributed-tuberculosis-vaccine-in-a-low-density-wildlife-population-of-brushtail-possums-trichosurus-vulpecula
#17
Graham Nugent, Ivor J Yockney, E Jackie Whitford, Martin L Cross, Frank E Aldwell, Bryce M Buddle
Oral-delivery Mycobacterium bovis bacillus Calmette-Guérin (BCG) vaccine in a lipid matrix has been shown to confer protection against M. bovis infection and reduce the severity of tuberculosis (TB) when fed to brushtail possums (Trichosurus vulpecula), the major wildlife vector of bovine TB in New Zealand. Here we demonstrate the feasibility of aerial delivery of this live vaccine in bait form to an M. bovis-infected wild possum population, and subsequently assess vaccine uptake and field efficacy. Pre-trial studies indicated a resident possum population at very low density (<0...
2016: PloS One
https://www.readbyqxmd.com/read/27473982/sex-difference-in-the-survival-rate-of-wild-brushtail-possums-trichosurus-vulpecula-experimentally-challenged-with-bovine-tuberculosis
#18
Carlos Rouco, Kyle S Richardson, Bryce M Buddle, Nigel P French, Daniel M Tompkins
The main wildlife reservoir of bovine tuberculosis (TB) in New Zealand is the introduced brushtail possum (Trichosurus vulpecula), with spillover of infection from possums to livestock being regarded as the largest barrier to eradicating TB from the country. Past studies have experimentally challenged possums with Mycobacterium bovis (the causative agent of TB) to quantify infection parameters. However, the challenge models used are invariably non-representative of natural infection due to their resulting in much faster rates, and different clinical patterns of disease progression...
August 2016: Research in Veterinary Science
https://www.readbyqxmd.com/read/27341209/refining-operational-practice-for-controlling-introduced-european-rabbits-on-agricultural-lands-in-new-zealand
#19
A David M Latham, M Cecilia Latham, Graham Nugent, James Smith, Bruce Warburton
European rabbits (Oryctolagus cuniculus) pose a major threat to agricultural production and conservation values in several countries. In New Zealand, population control via poisoning is a frontline method for limiting rabbit damage, with large areas commonly treated using the metabolic toxin sodium fluoroacetate ('1080') delivered in bait via aerial dispersal. However, this method is expensive and the high application rates of the active ingredient cause public antipathy towards it. To guide reductions in cost and toxin usage, we evaluated the economics and efficacy of rabbit control using an experimental approach of sowing 1080-bait in strips instead of the commonly-used broadcast sowing method (i...
2016: PloS One
https://www.readbyqxmd.com/read/27256074/the-use-of-polyethylene-glycol-in-mammalian-herbivore-diet-studies-what-are-we-measuring
#20
Hannah R Windley, Hannah J Wigley, Wendy A Ruscoe, William J Foley, Karen J Marsh
Polyethylene glycol (PEG) has been used to study the intake and digestion of tannin-rich plants by mammalian herbivores because it preferentially binds to tannins. However, it is not clear whether the responses of herbivores to dietary PEG is due to increased protein availability from the release of tannin-bound protein, amelioration of tannin effects, or whether PEG also may bind to other compounds and change their activity in the gut. We used three native New Zealand tree species to measure the effect of PEG on the amount of foliage eaten by invasive common brushtail possums (Trichosurus vulpecula) and on in vitro digestible nitrogen (available N)...
June 2016: Journal of Chemical Ecology
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