ORCID Profile
0000-0002-9364-6438
Current Organisations
Australian Institute of Marine Science
,
James Cook University
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Publisher: Elsevier BV
Date: 2021
Publisher: SAGE Publications
Date: 12-11-2018
Abstract: Cervical cancer mortality has halved in Australia since the national cervical screening program began in 1991, but elevated mortality rates persist for Aboriginal and Torres Strait Islander women (referred to as Aboriginal women in this report). We investigated differences by Aboriginal status in abnormality rates predicted by cervical cytology and confirmed by histological diagnoses among screened women. Using record linkage between cervical screening registry and public hospital records in South Australia, we obtained Aboriginal status of women aged 20–69 for 1993–2016 (this was not recorded by the registry). Differences in cytological abnormalities were investigated by Aboriginal status, using relative risk ratios from mixed effect multinomial logistic regression modelling. Odds ratios were calculated for histological high grade results for Aboriginal compared with non-Aboriginal women. Of 1,676,141 linkable cytology tests, 5.8% were abnormal. Abnormal results were more common for women who were younger, never married, and living in a major city or socioeconomically disadvantaged area. After adjusting for these factors and numbers of screening episodes, the relative risk of a low grade cytological abnormality compared with a normal test was 14% (95% confidence interval 5–24%) higher, and the relative risk of a high grade cytological abnormality was 61% (95% confidence interval 44–79%) higher, for Aboriginal women. The adjusted odds ratio of a histological high grade was 76% (95% confidence interval 46–113%) higher. Ensuring that screen-detected abnormalities are followed up in a timely way by culturally acceptable services is important for reducing differences in cervical cancer rates between Aboriginal and non-Aboriginal women.
Publisher: Elsevier BV
Date: 04-2022
Publisher: Springer Science and Business Media LLC
Date: 28-07-2023
DOI: 10.1007/S10695-023-01222-4
Abstract: Giant grouper ( Epinephelus lanceolatus ) is an economically important yet under-researched species, still reliant on ‘trash fish’ or generic aquafeeds. The transition toward sustainable formulations is contingent on establishing requirements of target species for limiting nutrients, among which the sulfur amino acids (methionine and cysteine) commonly limit fish growth. Further, there remains significant conjecture around the role of the sulfonic acid taurine in marine aquafeed formulation and its relationship to sulfur amino acids. To develop a species-specific feed formulation for giant grouper, dietary methionine was modulated in a dose-response experiment to achieve five graded levels from 9.5 to 21.5 g/kg, including an additional diet with methionine at 18.6 g/kg supplemented with 8 g/kg taurine. The mean (±SD) cysteine level of the diets was 4.5 ± 0.3 g/kg. Each diet was randomly allocated to triplicate tanks of 14 fish (83.9 ± 8.4 g). The best-fit regression for growth showed that the optimal dietary methionine content was 15.8 g/kg and the total sulfur amino acid content was 20.3 g/kg. Inadequate dietary methionine content triggered physiological responses, including hepatic hyperplasia and hypoplasia at 9.5 and 21.5 g/kg, respectively, and high aspartate transaminase levels at 18.9 g/kg. Moreover, inadequate dietary methionine contents resulted in higher densities of mixed goblet cell mucin and reduced absorptive surface area of posterior intestinal villi. Our results suggest that adequate levels of methionine, but not taurine, improved posterior intestinal conditions and liver homeostasis. These findings may aid in formulating aquafeeds to optimize gastrointestinal and liver functions in juvenile giant grouper.
Publisher: Elsevier BV
Date: 11-2023
Publisher: Elsevier BV
Date: 06-2021
Publisher: Springer Science and Business Media LLC
Date: 17-05-2023
DOI: 10.1007/S10695-023-01191-8
Abstract: Reliable short-term chilled sperm storage is a critical prerequisite to using advanced reproductive techniques for captive breeding of barramundi (Asian sea bass Lates calcarifer ). Marine Ringer's solution (MRS) is a common non-activating medium (NAM) and has previously been used to store sperm from wild-caught barramundi. However, MRS-stored spermatozoa from captive-bred barramundi were observed to lyse within 30 min incubation. Therefore, this study aimed to optimize the composition of NAM for short-term chilled storage by characterizing and mimicking the biochemical profile of seminal and blood plasma of captive-bred barramundi. To further understand the effect of each component, osmolality was first examined to determine its effect on sperm viability. Thereafter, the effects of NaHCO 3 , pH, and Na + and K + concentrations on sperm motility were investigated. Optimization of the NAM formula was achieved through iterative adaptions. The increase in NAM osmolality from 260 to 400 mOsm/kg led to a significant improvement in sperm viability. Moreover, using HEPES instead of NaHCO 3 as buffering agent significantly enhanced sperm motility and velocity. As a result, sperm s les diluted with optimized NAM (185 mM NaCl, 5.1 mM KCl, 1.6 mM CaCl 2 ·2H 2 O, 1.1 mM MgSO 4 ·7H 2 O, 10.0 mM HEPES, 5.6 mM D + glucose, 400 mOsm/kg, pH 7.4) and stored at 4 °C showed no significant loss in total motility for up to 48 h and retained progressive motility for up to 72 h. The optimized NAM developed in this study significantly extended the functional lifespan of spermatozoa during chilled storage, permitting the ongoing development of advanced reproductive technologies for barramundi.
Publisher: Elsevier BV
Date: 07-2019
DOI: 10.1016/J.SOCSCIMED.2019.06.004
Abstract: There are significant health and social disparities between the world's Indigenous and non-Indigenous people on factors likely to influence quality of life (QOL) and wellbeing. However, these disparities in wellbeing are not captured in conventional QOL instruments, as they often do not include dimensions that are likely to be relevant to Indigenous people. The objective of this comprehensive literature review was to identify these wellbeing domains for Aboriginal and Torres Strait Islander people in Australia (hereafter, respectfully referred to collectively as Indigenous Australians). We searched PsycINFO, MEDLINE, Econlit, CINAHL, and Embase (from inception to June 2017, and updated in March 2019), and grey literature sources using keywords relating to adult Indigenous Australians' QOL and wellbeing. From 278 full-text articles assessed for eligibility, 95 were included in a thematic analysis. This synthesis revealed nine broad interconnected wellbeing dimensions: autonomy, empowerment and recognition family and community culture, spirituality and identity Country basic needs work, roles and responsibilities education physical health and mental health. The findings suggest domains of wellbeing relevant to and valued by Indigenous Australians that may not be included in existing QOL and wellbeing instruments, domains that may be shared with Indigenous populations globally. This indicates the need for a tailored wellbeing instrument that includes factors relevant to Indigenous Australians. Developing such an instrument will ensure meaningful, culturally-relevant measurement of Indigenous Australians' wellbeing.
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