Reservoir of Invasive Salmonellosis in Children, DRC

Institute of Tropical Medicine, Belgium

Status: Completed

Conditions: Infection of Bloodstream; Salmonella Infections

Treatments: Behavioral: Sample collection

Study type: Observational

Funder types: Other

Identifiers

NCT03073707

1113/16

Details and patient eligibility

About

Bloodstream infections caused by non-typhoid Salmonella (NTS) are a major killing disease in Sub-Saharan Africa. Despite the high case fatality rate, the main reservoir -human, zoonotic or environmental- for invasive NTS rests unknown.

The main objective of this study is to assess

1. the household environment (household member, cattle and pets, rats) for intestinal carriage of NTS and
2. the household water supply for presence of NTS .

Households of children with proven NTS invasive infection will be addressed.

Full description

This study will be a case-based microbiological assessment of the household environment of index patients presenting with NTS infection. Index patients with laboratory confirmed NTS bloodstream infections will be randomly addressed for the collection of samples from their household (household members, animals (domestic animals and rats) and water supply). The collection of those samples will be done as close as possible to the timing of diagnosis in the index patient.

The sites of blood culture collection are the General Hospitals of Makiso and Kabondo and the Centre Hospitalier Village de Pédiatrie. Blood cultures will be drawn by nursing staff according to the standard procedures of the surveillance study. A total of 1500 blood cultures is expected with a positivity rate of 10% (Falay, 2016). According to previous prevalence data in DR Congo, the expected number of NTS in this sample group will be 50 isolates.

The isolates of Salmonella sp. conserved on TSA agar will be shipped to ITM and the molecular identity of the isolates will be determined and pairs of isolates (index patient-household environment) will be compared for clonal identity, by whole genome sequencing or equivalent technique as appropriate.

A database will be completed that contains the study data. Data that can have a link to the patient identity will be coded.

Enrollment: 96 patients

Sex: All

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• Households where at least one child is diagnosed with NTS bloodstream infection
• Willing to give informed consent

Exclusion criteria

• Refusal of participation

Trial design

96 participants in 1 patient group

Household

Description:

Sample collection will be anticipated for 20 cases of NTS infections and household/environment in order to analyze 10 combinations of NTS strains in the index patient and its environment

Treatment:

Behavioral: Sample collection