Publications by authors named "Mark Westman"

The platypus () is an amphibious, egg-laying mammal of high conservation value that is found only in Australia. The zoonotic bacterium serovar Hardjo was discovered in platypuses in prior studies, but little is known about its epidemiology. Samples in the Platypus Serum Bank were tested in 2023 and the results were combined with historical records.

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  • Brucella suis infection in dogs is a growing concern globally, necessitating specific management due to zoonotic and animal welfare risks.
  • This study evaluated the effectiveness of three serological tests (RBRPT, CFT, C-ELISA) on 989 dog serum samples to diagnose Brucella suis, using advanced statistical techniques to interpret results.
  • Results showed that while all tests are useful for detecting B. suis antibodies, they should not be used alone; their accuracy depends on the likelihood of the disease based on the dog's background and clinical signs.
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Introduction: Bovine Genital Campylobacteriosis (BGC), caused by subsp. venerealis, is a sexually transmitted bacterium that significantly impacts cattle reproductive performance. However, current detection methods lack consistency and reliability due to the close genetic similarity between subsp.

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  • Leptospirosis, a disease from spirochete bacteria, affected 34 dogs and one human in urban Sydney from December 2017 to December 2023.
  • An environmental survey was conducted from December 2023 to January 2024, collecting 75 samples from 20 public parks to test for pathogenic DNA of the bacteria.
  • Pathogenic leptospires were found in all parks sampled, but no significant differences were noted based on dog access to the areas, highlighting the need for further research on the bacteria's prevalence.
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Coxiella burnetti is an intracellular bacterium that causes Q fever, a disease of worldwide importance. Q-VAX , the approved human Q fever vaccine, is a whole cell vaccine associated with safety concerns. Here a safe particulate subunit vaccine candidate is developed that is ambient-temperature stable and can be cost-effectively manufactured.

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  • Anthelmintic-resistant nematodes threaten livestock production, making early detection of resistance critical to minimize losses.
  • A new mixed deep amplicon sequencing method has been developed for detecting genes associated with resistance in parasitic worms, marking a first in veterinary diagnostics across multiple drug types and worm species.
  • In Australian field isolates, levamisole resistance was less common than benzimidazole resistance, indicating levamisole remains effective for small ruminants in New South Wales.
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Leptospirosis is an emerging disease among people and dogs in Sydney, Australia. However, the routes of transmission in these cases, and in particular the possible role of rats as reservoirs of infection in Sydney, are unknown. Rats were collected within the City of Sydney Council area and their kidneys were tested for pathogenic DNA by real-time (q)PCR.

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Free-roaming cats pose a risk to their own health and welfare, as well as to the health and welfare of wildlife and humans. This study aimed to monitor and quantify area-specific free-roaming cat movement. Two local government areas (LGAs) in Greater Sydney were included, Campbelltown (CT) and the Blue Mountains (BM).

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Different feline leukemia virus (FeLV) infection outcomes are possible in cats following natural exposure, such as progressive infections (persistent viremia), regressive infections (transient or no viremia followed by proviral persistence) and abortive infections (presence of only antibodies). Laboratory-based testing is currently required for categorization of infection outcomes in cats. The aim of this study was to evaluate the field performance of a novel, rapid, combination point-of-care (PoC) test kit commercially available in Europe (v-RetroFelAg/Ab; 2020-2021 version) to determine different FeLV infection outcomes by concurrent detection of FeLV antigen (p27) and antibodies against FeLV transmembrane envelope protein (p15E).

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Feline immunodeficiency virus (FIV) is a retrovirus that can cause immunosuppression, co-morbidities, and neoplasia in infected cats, and is commonly tested for in veterinary clinics and animal shelters in Australia. FIV diagnosis using point-of-care (PoC) kits to detect FIV antibodies in Australia is complicated by the commercial availability of an inactivated whole-FIV vaccine. The aim of this study was to determine the accuracy of the RapidSTATUS™ FIV antibody test kit in FIV-vaccinated and FIV-unvaccinated cats in Australia.

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Feline immunodeficiency virus (FIV) infection in experimentally infected domestic cats produces characteristic clinical manifestations including hematological changes, neurological disease, neoplasia (most notably lymphoma) and lymphopenia-mediated immunodeficiency predisposing cats to a range of secondary infections. Conflicting reports exist, however, with regard to disease associations and survival time in naturally FIV-infected cats. The purpose of this retrospective case−control study was to investigate the effect of natural FIV infection on hematological, blood biochemical and urinalysis parameters and survival time in three cohorts of pet cats in Australia.

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Background: In humans, blood groups are associated with varying prevalence of infections. The aim of this study was to determine if associations exist between the feline AB blood group system and haemoplasma infection.

Methods: Data from two studies were combined.

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Q fever is caused by the bacterium and is spread to humans from infected animals especially goats, sheep and cattle, predominantly when giving birth. There is an effective human vaccine (Q-VAX) against Q fever, and although Q fever is a worldwide problem, the vaccine is only used in Australia due to difficulties associated with its use and the risk of adverse reactions. The desire to protect humans, particularly farmers and abattoir workers, from Q fever prompted the development of a new safe and effective human vaccine without all the difficulties associated with the current vaccine.

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Objectives: The relationship between blood group antigens and disease has been studied in humans. Blood types have been associated with both decreased and increased rates of various infections. In addition, blood group expression has been shown to vary with some cancers and gastrointestinal diseases.

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Bovine trichomonosis, caused by infection with the protozoan parasite , is globally recognised as a cause of reproductive failure in cattle. Maintained in clinically normal bulls, infection results in infertility and abortion in infected cows. In Australia's Northern Territory (NT), logistical limitations associated with extensive livestock production inhibit wide-scale testing and diagnosis, allowing the parasite to persist undetected.

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Background: Leptospirosis is a zoonotic disease with a worldwide distribution, caused by pathogenic serovars in the genus Leptospira. Feral pigs are known carriers of Leptospira species and pig hunting using dogs is a common recreational activity in Queensland, Australia.

Methodology And Principal Findings: This study aimed to determine the seroprevalence of Leptospira spp.

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Animal owners who experience the death of a beloved family pet or companion animal may experience feelings of grief and loss that are synonymous with the death of a human. This systematic review synthesized 19 qualitative papers from 17 studies that explored the psychosocial impact of bereavement and grieving the loss of a pet. The analysis revealed five themes: Their Relationship; Their Grief; Their Guilt; Their Supports; and Their Future.

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Although the antibody response induced by primary vaccination with Fel-O-Vax FIV (three doses, 2-4 weeks apart) is well described, the antibody response induced by annual vaccination with Fel-O-Vax FIV (single dose every 12 months after primary vaccination) and how it compares to the primary antibody response has not been studied. Residual blood samples from a primary FIV vaccination study ( = 11), and blood samples from cats given an annual FIV vaccination ( = 10), were utilized. Samples from all 21 cats were tested with a commercially available PCR assay (FIV RealPCR), an anti-p24 microsphere immunoassay (MIA), an anti-FIV transmembrane (TM; gp40) peptide ELISA, and a range of commercially available point-of-care (PoC) FIV antibody kits.

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A field study undertaken in Australia compared the antibody responses induced in client-owned cats that had been vaccinated using two inactivated whole feline leukaemia virus (FeLV) vaccines, the monovalent vaccine Fel-O-Vax Lv-K and the polyvalent vaccine Fel-O-Vax 5. Serum samples from 428 FeLV-uninfected cats (118 FeLV-vaccinated and 310 FeLV-unvaccinated) were tested for anti-FeLV neutralising antibodies (NAb) using a live virus neutralisation assay to identify 378 FeLV-unexposed (NAb-negative) and 50 FeLV-exposed (NAb-positive; abortive infections) cats, following by anti-surface unit (SU) FeLV-A and FeLV-B antibody ELISA testing. An additional 42 FeLV-infected cats (28 presumptively regressively infected, 14 presumptively progressively infected) were also tested for anti-SU antibodies.

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A prolonged length of stay (LOS) in a rehoming shelter can be detrimental to cat behaviour, health and welfare. Research shows LOS is impacted by animal signalment, behaviour and personality, whether or not previously owned or a stray, and considerations such as cage placement, cage design and the provision of enrichment. A retrospective study was undertaken at a charity organisation that rehomes surrendered and stray cats from three UK shelters.

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Pet ownership provides a unique relationship that is beneficial to many aspects of the pet owner's life, including mental health and companionship. Mental health and social isolation are negatively impacted by homelessness, increasing the importance of the owner-pet bond during this time. However, this relationship is complicated by the need for pet owners to urgently find accommodation for themselves while still caring for their pets.

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The guidelines are a consensus report on current recommendations for vaccination of cats of any origin, authored by a Task Force of experts. The guidelines are published simultaneously in the (volume 22, issue 9, pages 813-830, DOI: 10.1177/1098612X20941784) and the (volume 56, issue 4, pages 249-265, DOI: 10.

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Background: Canine heartworm disease, caused by Dirofilaria immitis, has global veterinary importance. In Australia, the prevalence of canine heartworm infection decreased markedly following the introduction of over-the-counter macrocyclic lactones. We aimed to estimate the prevalence of canine heartworm infection in at-risk populations of dogs in eastern Australia and analyse published prevalence data from Australia.

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Hunting feral pigs using dogs is a popular recreational activity in Australia. Dogs are used to flush, chase, bail, and hold feral pigs, and their use for these activities is legal in some states and territories and illegal in others. However, there is little knowledge about the health and welfare of dogs owned specifically for the purpose of pig hunting.

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Feline immunodeficiency virus (FIV), feline calicivirus (FCV), and feline herpesvirus (FHV-1) are common viral infections of domestic cats in Australia. A study was performed to investigate the possible effect of area-based socioeconomic factors on the occurrence of FIV, FCV, and FHV-1 infection in Australian client-owned cats. A total of 1044 cases, reported to a voluntary Australian online disease surveillance system between January 2010 and July 2017, were analysed with respect to their postcode-related socioeconomic factors using the Socio-Economic Indexes For Areas (SEIFA).

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