Publications by authors named "Chaber A"

Toxoplasma gondii (T. gondii) is a protozoan parasite of substantial impact to small ruminants, with reproductive failure a possible outcome of exposure. This observational study assessed T.

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Q fever, caused by Coxiella burnetii, is an important zoonotic and public health concern worldwide. Kangaroos are thought to be a likely wildlife reservoir for C. burnetii in Australia and the kangaroo tick (Amblyomma triguttatum) has often been considered a vector.

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Macropods are often implicated as the main native Australian reservoir hosts of (Q fever); however, the maintenance and transmission capacity of these species are poorly understood. The objective of this cross-sectional study was to describe the epidemiology of in a high-density population of eastern grey kangaroos () in a peri-urban coastal nature reserve in New South Wales, Australia. Blood, faeces and swabs were collected from forty kangaroos as part of a population health assessment.

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  • - The white-bellied pangolin faces serious trafficking threats, and a study analyzed 562 pangolins in central Africa to understand its population genetics and the domestic trade dynamics.
  • - Findings revealed overlapping genetic lineages with minimal introgression and suggested a significant decline in population size, likely due to historical factors and current trade routes radiating up to 600 km from markets in Cameroon.
  • - The study recommends improved monitoring of key trade hubs like the Yaoundé market and emphasizes the need for better enforcement of CITES regulations in Europe to help protect pangolin populations.
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Coxiella burnetii, the causative agent of Q fever, is a zoonotic bacteria of global public health significance. The organism has a complex, diverse, and relatively poorly understood animal reservoir but there is increasing evidence that macropods play some part in the epidemiology of Q fever in Australia. The aim of this cross-sectional survey was to estimate the animal- and tissue-level prevalence of coxiellosis amongst eastern grey (Macropus giganteus) and red (Osphranter rufus) kangaroos co-grazing with domestic cattle in a Q fever endemic area in Queensland.

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The illegal movement of wildlife poses a public health, conservation and biosecurity threat, however there are currently minimal screening tools available at international ports of entry to intercept wildlife trafficking efforts. This review first aimed to explore the screening tools available or under development for the detection of concealed wildlife contraband at international ports, including postal services, airlines, road border crossings and maritime routes. Where evidence was deficient, publications detailing the use of methods to uncover other illicit substances, such as narcotics, weapons, human trafficking, explosives, radioactive materials, or special nuclear material, were compiled and assessed for their applicability to the detection of wildlife.

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  • Translocation projects can help restore wildlife populations but also risk spreading diseases to both native and introduced species.
  • A study reviewed cases of translocation leading to significant disease issues, showing equal instances for both wild-caught and captive-bred animals.
  • Pathogen types were often linked to the species being translocated, highlighting the need for careful disease risk assessments in future projects to avoid negative outcomes.
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The carriage of bushmeat into the European Union is an infringement of EU Animal Health and Wildlife Trade legislation and poses a threat to biodiversity and public health. To explore the nature and scale of the international bushmeat trade, seized leaking luggage and passengers arriving at Brussels Zaventem airport from sub-Saharan Africa between 2017 and 2018 were searched for "meat" (bushmeat and livestock) by border control authorities. Visual identification, radiography and genetic analysis were applied to derive information from seized specimens, including at least ten CITES-listed species.

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There is an urgent need for biosurveillance of unregulated African meat imports at border points of entry in destination markets. This is underscored by recent pandemics linked to exotic wildlife products. Our objective was to catalog the quantity of meat that is informally transported from Africa into and through Europe often without any veterinary or sanitary checks.

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  • Animal models, especially macaques, are crucial for human medicine but have led to concerns about the international trade and regulations affecting their welfare and public health.
  • A study analyzed CITES data from 2000 to 2020, revealing significant discrepancies in reported macaque trade quantities between exporting and importing nations, particularly in 2019 and 2020.
  • The findings highlight the need for stricter global regulations to ensure the legal trade of macaques, support ethical research practices, and minimize risks of disease transmission.
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Purpose: To complement conventional testing methods for severe acute respiratory syndrome coronavirus type 2 infections, dogs' olfactory capability for true real-time detection has been investigated worldwide. Diseases produce specific scents in affected individuals via volatile organic compounds. This systematic review evaluates the current evidence for canine olfaction as a reliable coronavirus disease 2019 screening tool.

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  • Social media acts as a crucial platform for wildlife crime syndicates, allowing them to tap into a global market for wildlife products, specifically bushmeat.
  • A detailed analysis of 563 posts from West African Facebook pages revealed a range of 25 bushmeat species being marketed, many of which are threatened or protected under international and local laws.
  • The study highlights that the online presence of these protected species demonstrates insufficient enforcement of wildlife trade regulations, and emphasizes the need for stronger policies to curb the illegal sale of bushmeat facilitated by social media.
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Recent concerns have arisen in Australia regarding detections of the exotic bacterium Ehrlichia canis which has resulted in ehrlichiosis outbreaks. In Australia, it is spread by the tropical brown dog tick Rhipicephalus linnaei, formerly Rhipicephalus sanguineus sensu lato tropical lineage. Previously, the tick has been recorded in South Australia in the Coober Pedy and the Oodnadatta areas.

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From 1975 to 2021, the United Arab Emirates (UAE) imported more than 1300 live Arabian oryxes (AOs) and scimitar-horned oryxes (SHOs) for conservation programs. The objective of this study was to estimate the prevalence of orbiviruses Bluetongue virus (BTV) and epizootic hemorrhagic disease virus (EHDV) in AOs and SHOs from captive herds in the UAE. Between October 2014 and April 2015, 16 AOs and 13 SHOs originating from Texas (USA) and 195 out of about 4000 SHOs from two locations in the UAE were blood sampled to be tested by indirect enzyme-linked immunosorbent assay (ELISA) and real-time reverse transcriptase polymerase chain reaction (RT-qPCR) assays.

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Kangaroos are considered to be an important reservoir of Q fever in Australia, although there is limited knowledge on the true prevalence and distribution of coxiellosis in Australian macropod populations. Serological tests serve as useful surveillance tools, but formal test validation is needed to be able to estimate true seroprevalence rates, and few tests have been validated to screen wildlife species for Q fever. In this study, we modified and optimized a phase-specific indirect immunofluorescence assay (IFA) for the detection of IgG antibodies against Coxiella burnetii in macropod sera.

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Reverse transcription polymerase chain reaction (RT-PCR) is currently the standard diagnostic method to detect symptomatic and asymptomatic individuals infected with Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). However, RT-PCR results are not immediate and may falsely be negative before an infected individual sheds viral particles in the upper airways where swabs are collected. Infected individuals emit volatile organic compounds in their breath and sweat that are detectable by trained dogs.

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In 2013, Brucella melitensis biovar 1 was recovered from the stomach contents of a scimitar-horned Oryx - SHO (Oryx dammah) aborted foetus, and from the articular fluid of a sand gazelle (Gazella marica) in a captive wildlife collection near Abu Dhabi, United Arab Emirates. Other evidence of exposure to the pathogen was collected through serological testing (Rose Bengal test) and B. melitensis-specific PCR of samples from captive wildlife kept in six different enclosures.

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Objective: To explore animal science and veterinary students' and livestock farmers' perceptions concerning Q fever prevention.

Design: An online survey with an open-ended question seeking knowledge and perceptions about Q fever prevention was distributed among participants during March-September 2019. We applied thematic analysis to identify emerging themes.

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Objective: To examine stakeholder perspectives on the factors of an effective approach to reduce Q fever risk including disease prevention, and the perceived potential benefits of a One Health framework.

Methods: Semi-structured interviews were conducted with general practitioners (GPs), veterinarians, government authorities, researchers, and representatives from the farming industry. Transcripts were thematically analysed.

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Article Synopsis
  • - A juvenile short-beaked common dolphin found dead in Australia was infected with a significant aquatic pathogen, identified as *beta-haemolytic Streptococcus*, causing severe health issues like subcutaneous abscesses and sepsis.
  • - The dolphin exhibited symptoms including deep skin ulcerations and had heavy bacterial growth from skin lesions and heart blood, suggesting systemic infection.
  • - This case is notable because *beta-haemolytic Streptococcus* has not been previously reported in wild marine mammals or Australian dolphins, raising concerns about its impact on both wild dolphin populations and fish stocks.
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