Determining the Causes and Outcomes of Febrile Illness in Health Care Facilities in Rural South and Southeast Asia, as Part of the South and Southeast Asian Community-based Trials Network (SEACTN). Work Package B (WP-B).

The majority of people in low- and middle-income countries (LMICs) in South and Southeast Asia live in rural areas. These people are some of the poorest in the region and the exact health issues which concern them have not been well defined, in that they have not been fully studied. Despite this lack of data, there are indications that disease of an infectious aetiology, 'febrile illness,' in particular in the tropics, still accounts for significant morbidity and mortality. This is in contrast to higher-income countries.

The South and Southeast Asian Community-based Trials Network in Rural Febrile Illness project (SEACTN RFI) aims to better understand and quantify the burden of febrile illness, the aetiological causes and the manner in which it affects the people of the area, all on a scale which has not been attempted before. It will collect information to help better understand and predict these outcomes based on a multitude of factors, which will form the basis for interventions within the network in the future. The initial study will be observational, as the current understanding of the local health issues and the health systems in these areas is insufficient to know how best to intervene.

In a separate work package, Work Package A (WP-A), the investigators will be collecting data from within the participating SEACTN communities through village health workers (VHWs) and local health facilities on the incidence, causes and outcomes of febrile illness in these areas.

In Work Package B (WP-B) will recruit patients seeking care at higher level facilities than the WP-A VHWs and health centres. These patients are likely to be more severely ill, in order to obtain a more thorough understanding of the causes and burden of febrile illness in these areas. A broader range of specimens, including venous blood samples and respiratory specimens will be collected. In-depth diagnostic testing including blood cultures, serological assays, pathogen molecular diagnostics, host biomarker assays, and validation of pathogen-blind next generation sequencing approaches will be conducted. The data from WP-A gathered in the community complemented by the WP-B data from higher level health facilities in the same regions will provide a rich understanding of the causes, incidence and outcomes of febrile illness in these areas. These data will be analysed using advanced statistical methodology to create electronic decision-support tools (eDSTs) to aid VHWs in their assessment, triage and treatment of patients. These and other relevant interventions will later be trialled across the SEACTN villages.