Transmission of group A Streptococcus in long-term care: An outbreak investigation.

We report 2 outbreaks comprising a cluster of 18 group A Streptococcal infections across 2 nursing facilities. Point prevalence surveillance testing identified 8 of 18 cases, and whole genome sequencing validated transmission pathways. Infection prevention interventions at the facility level comprised symptomatic and asymptomatic carriage-based case finding, transmission-based precautions, and treatment to eradicate colonization.

A novel approach to correcting attribution of in a healthcare setting.

Objective: To describe a novel attribution metric estimating the causal source location of healthcare-associated and compare it with the current US National Healthcare Safety Network (NHSN) surveillance reporting standard.

Design: Quality improvement study.

Setting: Two acute care facilities.