Jodie Low Choy's research while affiliated with Charles Darwin University and other places

Publications (9)

Article
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The Darwin region in northern Australia has experienced rapid population growth in recent years, and with it, an increased incidence of melioidosis. Previous studies in Darwin have associated the environmental presence of Burkholderia pseudomallei, the causative agent of melioidosis, with anthropogenic land usage and proximity to animals. In our st...
Data
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Birds with reported melioidosis or carriage of Burkholderia pseudomallei in previous publications and this report.
Article
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To the Editor: Melioidosis is an emerging infectious disease of humans and animals caused by the gram-negative bacterium Burkholderia pseudomallei, which inhabits soil and surface water in the disease-endemic regions of Southeast Asia and northern Australia (1). The aim of this study was to assess the potential for birds to spread B. pseudomallei....
Article
Molecular typing methods for Burkholderia pseudomallei have been successful at assigning isolates into epidemiologically related groups, but have not been able to detect differences and define evolutionary patterns within groups. Our variable number tandem repeat (VNTR) analysis of a set of 121 Australian B. pseudomallei isolates, 104 of which were...
Article
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Melioidosis was first diagnosed in Australia in sheep in 1949. While it has been considered endemic in tropical Australia, there have been animal outbreaks in southwest Western Australia and southern Queensland. Infection occurs in many species, with both latency and a wide range of clinical manifestations. Some species may develop melioidosis only...
Article
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Overcrowding is a significant factor contributing to endemic infection with Sarcoptes scabiei in human and animal populations. However, since scabies mites from different host species are indistinguishable morphologically, it is unclear whether people can be infected from scabies-infested animals. Molecular fingerprinting was done using three S. sc...

Citations

... Reports of melioidosis in marsupials are extremely rare [16]; however, fatal cases in captive or highly stressed animals have occurred [17]. Melioidosis cases in birds [18], primates [19], and reptiles [20], and outbreaks associated with zoos [21] and intensive livestock agriculture [22], support the notion that stressful conditions may trigger the onset of disease. Although there is no evidence of a sustained zoonotic transmission cycle for Burkholderia spp., indirect transmission from animals and animal products poses a tangible risk to human health, particularly to those with melioidosis risk factors [14]. ...
... Feco-oral transmission was felt to be unlikely due to the fact that B. pseudomallei was infrequently isolated from fecal samples of infected pigs. However, fecal shedding has been detected from wallabies and wild stock, suggesting it may be a means of expanding the geographical distribution of B. pseudomallei (Höger et al. 2016). Recent nonhuman primate models showed that ingestion of >6 x 10 6 cfu resulted in acute-febrile, lethal disease (Nelson et al. 2021). ...
... Species that have been infected include terrestrial and aquatic mammals, birds, and fish. Goats, sheep, pigs, and camels appear particularly susceptible, whereas dogs, cats, and cattle appear more resistant, but these may develop disease if they become immunocompromised (Choy et al. 2000). Sporadic cases or small outbreaks have been reported in various primates, marsupials, deer, buffalo, camels, llamas, zebras, horses, mules, rabbits, meerkats, rodents, iguanas, parrots, crocodiles, dolphins, and seals (Elschner et al. 2014;Sprague and Neubauer 2004). ...
... Although B. pseudomallei colonization of humans is rare (29,41), the bacterium has been found in the feces of domestic and wild animals including wallabies, horses, and chickens (42,43), and in the beak of a healthy native peaceful dove (Geopelia placida) (44). A strong association exists between B. pseudomallei presence in soil and disturbance by horses, chickens, and pigs (45). ...
... Melioidosis has been reported in a wide-array of livestock and in domestic pets [9,10,12]. Surveillance from tropical Northern Australia and Thailand has also shown that sheep [15], camels [16] and alpacas [17] readily succumb to melioidosis, while goats have diverse presentations similar to humans [12,18] and pigs can often have asymptomatic internal infections [19]. ...
... We have collected and cultured B. pseudomallei isolates from P314's airways since this initial diagnosis to better understand the population dynamics in this unprecedented case. We have previously shown genetic diversity in variable-number tandem repeat loci among these isolates [26] and subsequently compared three P314-derived genomes to document some of the evolutionary changes over an 11.5-year period [25]. Here, we analyze and compare the genomes and phenotypic characteristics of 118 B. pseudomallei isolates sampled over a >16-year chronic carriage period from P314's airways, along with six closely-related isolates sampled from P314's home between two and four years after diagnosis. ...