One versus two doses of ivermectin-based mass drug administration for the control of scabies: A cluster randomised non-inferiority trial.

BACKGROUND: Mass drug administration (MDA) based on two doses of ivermectin, one week apart, substantially reduces prevalence of both scabies and impetigo. The Regimens of Ivermectin for Scabies Elimination (RISE) trial assessed whether one-dose ivermectin-based MDA would be as effective. METHODS: RISE was a cluster-randomised trial in Solomon Islands. We assigned 20 villages in a 1:1 ratio to one- or two-dose ivermectin-based MDA. We planned to test whether the impact of one dose on scabies prevalence at 12 and 24 months was non-inferior to two, at a 5% non-inferiority margin. RESULTS: We deferred endpoint assessment to 21 months due to COVID-19. We enrolled 5239 participants in 20 villages at baseline and 3369 at 21 months from an estimated population of 5500. At baseline scabies prevalence was similar in the two arms (one-dose 17·2%; two-dose 13·2%). At 21 months, there was no reduction in scabies prevalence (one-dose 18·7%; two-dose 13·4%), and the confidence interval around the difference included values substantially greater than 5%. There was however a reduction in prevalence among those who had been present at the baseline assessment (one-dose 15·9%; two-dose 10·8%). Additionally, we found a reduction in both scabies severity and impetigo prevalence in both arms, to a similar degree. CONCLUSIONS: There was no indication of an overall decline in scabies prevalence in either arm. The reduction in scabies prevalence in those present at baseline suggests that the unexpectedly high influx of people into the trial villages, likely related to the COVID-19 pandemic, may have compromised the effectiveness of the MDA. Despite the lack of effect there are important lessons to be learnt from this trial about conducting MDA for scabies in high prevalence settings. TRIAL REGISTRATION: Registered with Australian New Zealand Clinical Trials Registry ACTRN12618001086257.

Taking Paediatrics Abroad: Working with low- and middle-income countries in a global pandemic.

Children and young people around the world face challenges to their health and wellbeing. In particular, in low- and middle-income countries they experience a higher burden of disease, exacerbated by global inequity limiting access to quality health care. According to the inverse care law, the availability of quality health care varies inversely to the need of the population, and hardworking health-care professionals in under-resourced countries may face impediments to continued education or subspecialty training. In line with the Sustainable Development Goals, collaborations have been developed between high-income and low- and-middle-income countries to address global disparities in health. These collaborations face challenges of high financial costs, difficulties creating long-term sustainable change, and with the emergence of the COVID-19 pandemic, border closures preventing fly-in volunteers. In this paper, we describe the development of an innovative, paediatric-specific model of care for training and support between high- and low-income countries - Taking Paediatrics Abroad Ltd. Taking Paediatrics Abroad supports the development of mutually beneficial relationships between Australian paediatric health-care professionals and paediatric health-care professionals in developing countries and remote, underserved Australian Aboriginal communities. Since May 2020, there have been over 100 sessions covering a vast array of paediatric specialties. This article explores Taking Paediatrics Abroad's model of care, its implementation and challenges, and opportunities for the future.