The Australian 2019/2020 Black Summer Bushfires: Analysis of the Pathology, Treatment Strategies and Decision Making About Burnt Livestock

In this current wildfire crisis, acknowledge widespread suffering

With climate change causing more extreme weather events globally, climate scientists have argued that societies have three options: mitigation, adaptation or suffering. In recent years, devastating wildfires have caused significant suffering, yet the extent of this suffering has not been defined. To encapsulate this suffering, we determined impacts and effects of extreme wildfires through two systematic literature reviews. Six common themes of wildfire suffering emerged: environmental, social, physical, mental, cultural and resource suffering. These themes varied in scale: from local to regional; from individuals to communities; and from ecosystems to landscapes. We then applied these themes in the Las Maquinas (Chile) and Fort McMurray (Canada) wildfires. This highlighted several adaptation strategies that can reduce suffering, however our exploration indicates these strategies must address social and ecological factors. This analysis concludes that suffering from wildfires is diverse and widespread, and that significant engagement with adaptation strategies is needed if this is going to decrease.

Evidence-based guidelines for the post-fire assessment of domestic ruminants: a scoping review

Wildfires globally impact farmers, with risk expected to rise in the next thirty years. Beyond fatalities, wildfires impair the reproductive capabilities of surviving livestock due to smoke exposure. Effective interventions require considering animal welfare, prognosis, and costs. Enhanced clinical assessment is crucial. There is a paucity of data concerning decision-making processes regarding burn injuries in livestock. This study establishes evidence-based guidelines for wildfire-affected ruminants in field settings. The goal is categorizing scientific evidence to create prognostic guidelines. English and Spanish publications from Web of Science, Medline, and Google Scholar were searched using keywords related to burn injuries, disaster management, and animal welfare. A research matrix was populated based on inclusion criteria and evidence strength, leading to the development of visual triage guidelines for sheep and cattle. Most evidence comprises case reports (expert opinion) and observational trials. Ovine controlled trials in the 80 s and 90 s significantly advanced burn injury understanding in humans and animals. Key clinical factors determining burn severity include burn extent and depth, anatomic location, and smoke inhalation. Core non-clinical factors implicated in decision-making include feed, water, and shelter, amongst others. Animal categorization by burn severity creates a model for prioritising resources towards animals with the best recovery chances, protecting animal welfare.

Emergency response in overturned pig transport vehicles: Description and discussion of Danish cases from a One Welfare perspective

Based on experiences from stakeholders, this paper describes and discusses Danish emergency procedures when animal transport vehicles overturn, from a One Welfare perspective. Twenty qualitative interviews were conducted with selected stakeholders involved in emergency responses and their co-ordination. Results from interviews were extracted and are presented as a description of the Danish emergency management procedures in situations where pig transport vehicles overturn in a traffic accident. The description is followed by a discussion of six identified themes related to animal welfare and One Welfare in such situations: (1) Standard operating procedures; (2) Balancing animal welfare and work safety; (3) Roles, education and experience; (4) Communication, time and access to animals; (5) Debriefing; and (6) Killing of animals. Overall, the analyses of the interviews showed that the emergency response at an overturned pig transport vehicle involves different professional groups, requires technical knowledge regarding animal transport vehicles as well as knowledge of the species involved and how to handle the animals. The results are discussed from a One Welfare perspective, suggesting that these emergency responses include an inherent societal prioritisation dilemma involving the balancing of, for example, training, preparation and debriefing of different professional groups. Further research is needed to address ethical considerations, share best practices, and enhance emergency protocols.

Investigating factors underlying why householders remain in at-risk areas during bushfire disaster in Australia

Although most homes lack design and construction features to withstand bushfires, there is a growing trend of householders relocating to bushfire-prone areas. Notably, many bushfire-related fatalities have occurred within proximity, specifically within 100 m of bushland. Therefore, this paper explores the factors that drive householders to remain in at-risk areas, despite the imminent threat of bushfires. Thirty semi-structured interviews were conducted with participants residing in the southeastern region of New South Wales (NSW). The interviews were recorded, transcribed using Otter.AI, and subjected to thematic analysis using NVivo 12 Pro. The findings shed light on why certain householders decided to stay on their properties during the catastrophic 2019/2020 bushfires. Upon analysis, we uncovered thirty-six distinct factors that underlie householders' choices to remain during bushfires. These factors were categorized into nine groups: protection-related, attitude-related, information-related, operation-related, road-related, shelter-related, finance-related, health-related, and rebuilding-related factors. The study underscores the importance of understanding gender-based differences and pet ownership in bushfire evacuation decisions, emphasizing the need for tailored communication strategies. These findings hold several important implications for research and practice regarding early self-evacuation from bushfires.

Recent Progress in Two-Dimensional Nanomaterials for Flame Retardance and Fire-Warning Applications

Graphene-like 2D nanomaterials, such as graphene, MXene, molybdenum disulfide, and boron nitride, present a promising avenue for eco-friendly flame retardants. Their inherent characteristics, including metal-like conductivity, high specific surface area, electron transport capacity, and solution processability, make them highly suitable for applications in both structural fire protection and fire alarm systems. This review offers an up-to-date exploration of advancements in flame retardant composites, utilizing pristine graphene-like nanosheets, versatile graphene-like nanosheets with multiple functions, and collaborative systems based on these nanomaterials. Moreover, graphene-like 2D nanomaterials exhibit considerable potential in the development of early fire alarm systems, enabling timely warnings. This review provides an overview of flame-retarding and fire-warning mechanisms, diverse multifunctional nanocomposites, and the evolving trends in the development of fire alarm systems anchored in graphene-like 2D nanomaterials and their derivatives. Ultimately, the existing challenges and prospective directions for the utilization of graphene-like 2D nanomaterials in flame retardant and fire-warning applications are put forward.

'All we found were bones': Veterinary workers' distress and trauma after Australia's Black Summer bushfires

BACKGROUND

Australia's 2019/2020 Black Summer bushfires affected billions of animals, many of which were rescued and cared for by veterinary and animal care workers (VACWs). Little is known about VACWs' disaster-related experiences and how these experiences may affect them.

METHODS

We used a convergent mixed-methods design to explore how a variety of VACWs experienced the Black Summer bushfires. Data were gathered between April and July 2020. Participants (N = 93) were recruited via Facebook posts and emails that contained a link to an online survey. The survey included open-ended questions about VACWs' bushfire-related experiences and quantitative measures of posttraumatic stress disorder symptoms, psychological distress, burnout and grief.

RESULTS

Participants reported a variety of bushfire-related experiences and described several ways the disaster affected their work, personal lives and communities. Overall, participants scored highly on measures of psychological ill-health.

LIMITATIONS

Our cross-sectional design and use of non-probability sampling limited the generalisability of the results and may have introduced a response bias.

CONCLUSION

Our results contribute new information on the experiences of VACWs during and after bushfires and the psychological hazards they may face due to the extreme and prolonged stressors produced by such disasters. Implications for policy and veterinary practice are discussed.

Cutaneous and Respiratory Lesions in Bushfire-Affected Koalas

In the wake of increasingly frequent bushfires emerging as a threat to wildlife worldwide, koalas have notably been the most rescued species in Australia. However, our understanding of burns and their severity in koalas is limited; hence, this study investigated the histopathological features and depth of burns in koala skin, as well as the presence of smoke-induced respiratory tract damage. In four bushfire-affected koalas that had been euthanised on welfare grounds, skin burns in various body regions were scored based on clinical appearance as superficial, partial thickness, or full thickness. Histological sections of affected regions of skin were assessed as Grades I-IV and showed that furred regions on the ear margins and dorsum were histologically more severe, at Grade III, compared with the clinical score. There was a similar finding for footpad burns, which were the most common body region affected. In the respiratory tract, pulmonary oedema and congestion were evident in all koalas. Overall, the results highlight that cutaneous burn lesions on furred and palmar/plantar surfaces can have higher severity based on the burn depth than is clinically apparent. Therefore, there is a need to consider this when developing treatment plans and establishing prognosis for burnt koalas at triage, as well as that a high likelihood of pulmonary oedema exists.

Bacterial culture and antimicrobial susceptibility results from bovine milk samples submitted to four veterinary diagnostic laboratories in Australia from 2015 to 2019

A 5-year retrospective study was conducted to describe the mastitis-causing organisms isolated from bovine milk samples submitted to four veterinary diagnostic laboratories in Australia. The aim of this study was to identify temporal, geographical, and seasonal patterns of occurrence for the organisms and report the in vitro susceptibility of the most common mastitis-causing pathogens. In total, 22,102 milk samples were submitted between 2015 and 2019. The results were reported as positive growth for at least one significant organism (n = 11,407; 51.6%), no growth (n = 5,782; 26.2%), and mixed/contaminated growth (n = 4,913; 22.2%). Culture results for no growth, gram-negative bacteria, and eukaryotic organisms were combined for each region, and they were accounted for between 23 and 46% of submissions. These results represent a subset of mastitis cases for which the antibiotic treatment may not be warranted. A total of 11,907 isolates were cultured from 11,407 milk samples. The most common isolated organisms were Streptococcus uberis [41.3%; 95% confidence interval (CI): 40.4-42.1%] and Staphylococcus aureus (23.6%; 95% CI: 22.8-24.3%). For S. uberis and S. aureus, there was an association between a positive culture result and the dairy region. All regions except for the Sub-tropical Dairy region were more likely to culture S. uberis compared to the reference, Dairy NSW (P < 0.001). Similarly, for S. aureus, a positive culture result was more likely in all other dairy regions compared to Dairy NSW (P < 0.001). The LISA cluster analysis identified differences between High-High (hotspot) postcodes for S. aureus and S. uberis throughout all the analyzed dairy regions. These results highlight the need for further investigations into specific risk factors, such as environmental factors and herd-level predictors, which may have influenced the observed regional variations. Common mastitis-causing pathogens showed overall good susceptibility to a range of antimicrobials used in the treatment of mastitis. On-going surveillance of mastitis-causing pathogens and their antimicrobial susceptibilities will facilitate targeted mastitis control and treatment programs.

The black summer bushfires: impacts and risk factors for livestock bushfire injury in south-eastern Australia

Background

The 2019/2020 Australian bushfires were the largest bushfire event in modern Australian history. While actions to mitigate risk to homes from bushfires are well reported, there is very little research reported on the impacts of bushfires on livestock. With an increasing incidence of bushfires predicted, there is an urgent need to identify how farmers can best protect their livestock.

Objectives

Compare bushfire affected farms with and without injured livestock to identify associations between risk factors and bushfire injury. Infer management approaches that can be used to reduce bushfire injury in livestock.

Method

A case‐control study using a structured interview questionnaire, delivered in late 2020 to cattle and sheep farmers in south‐eastern Australia (New South Wales and Victoria) whose farmland was burnt in the 2019/2020 Australian bushfires. Case farms were farms with bushfires injured or killed livestock. Control farms were farms that had no bushfire injured livestock but that still had fire present on the farm. Interview responses were summarised and information theoretical approaches were used to identify potential risk factors for livestock bushfire injury and protective actions that could inform future fire‐preparation recommendations.

Results and discussion

Of 46 farms in the case‐control study, 21 (46%) reported bushfire injured or killed livestock. Apparent protective factors identified included: preparation (having a bushfire plan and more than two farm bushfire fighting units), backburning and receiving assistance from fire authorities. Combined beef and sheep grazing enterprises appeared to have an increased risk of bushfire injury to livestock.