Background and Aim
Over the past 25 years, the Northern Territory (NT) has experienced an epidemiological transition toward chronic and ageing-associated conditions, while communicable diseases such as pneumonia, influenza, and skin infections continue to contribute substantially to hospital morbidity. Hospital separations provide critical surveillance data to monitor disease burden and guide prevention strategies. This study examines long-term trends in communicable disease morbidity using NT public hospital data from 1999-2024, highlighting both progress and remaining opportunities to strengthen health equity.
Methods and Analysis
A retrospective analysis of NT public hospital separation data from 1999–2024 was undertaken. Principal diagnoses were classified using ICD-10-AM and analysed by age, sex, and Indigenous status. Age-standardised hospitalisation rates were calculated using Australian Bureau of Statistics population estimates. Communicable disease categories examined included respiratory infections, skin and soft tissue infections, gastrointestinal infections, and influenza-related admissions.
Outcomes
Communicable diseases remained among the ten leading causes of hospitalisation across all age groups. Pneumonia was the leading cause in 1999 (ASR 7.1 per 1,000) and, despite a decline over time, continued to contribute substantially to hospital morbidity in 2024, together with influenza and other acute respiratory infections. Skin infections such as cellulitis increased markedly over the period, becoming the second leading cause of hospitalisation by 2024 (ASR 5.7 per 1,000). Infectious gastroenteritis and viral respiratory infections remained major causes of paediatric admissions. Aboriginal Territorians experienced substantially higher communicable disease hospitalisation rates, with pneumonia rates exceeding 11 per 1,000 in 2024 compared with significantly lower rates among non-Aboriginal residents. These patterns suggest ongoing transmission risks, environmental exposures, and barriers to preventive care.
Conclusion and Future Actions
The gains achieved in declining communicable disease morbidity reflect strengths in preventive public health action and immunisation. Continued efforts in vaccination coverage, early detection, and culturally appropriate, community-led prevention strategies are essential to sustain improvements and close remaining gaps.