National Antimicrobial Resistance Surveillance (EARS-Net Ireland)

Data Collection Type
National data collections of health and social care in Ireland
Organisation

Health Protection Surveillance Centre (HPSC).

Year established

1999 (Staphylococcus aureus; Streptococcus pneumonia);
2002 (Escherichia coli; Enterococcus faecalis and Enterococcus faecium);
2006 (Klebsiella pneumoniae; Pseudomonas aeruginosa);
2014 (Acinetobacter spp.).

Statement of purpose

To monitor trends in antimicrobial resistance data from 8 key pathogens (listed above) in order to inform infection prevention and control teams and other policy decision makers.
The data from EARS-Net are used to produce a national report on S. aureus/MRSA bacteraemia by acute hospital.

Coverage (geographical and temporal)

All microbiology laboratories are required to participate in EARS-Net surveillance. However, resource issues can result in labs suspending their participation.

Between 2017 and 2020, coverage of the Irish population has exceeded 95%.

Data are available from 1999-2021.

Description/Summary

The European Antimicrobial Resistance Surveillance System (EARSS) was established in 1999 in response to the growing threat of antimicrobial resistance in Europe. In 2010 EARSS coordination was transferred to the European Centre for Disease Prevention and Control (ECDC) and renamed the European Antimicrobial Resistance Surveillance Network (EARS-Net).

EARS-Net Ireland comprises a network of 36 microbiological laboratories serving 60 acute hospitals (both public and private) in Ireland that collects routinely-generated antimicrobial susceptibility testing data on invasive infections caused by eight important bacterial pathogens: S. aureus, S. pneumoniae, E. coli, E. faecalis, E. faecium, K. pneumoniae, P. aeruginosa and Acinetobacter spp.

Additionally, data are collected on invasive cases of:
- Group A and Group B streptococci
- Candida spp. to check for the presence of C. auris, an important emerging pathogen.

Data users

Clinical microbiologists; Surveillance Staff, Medical Scientists, Infection Prevention and Control Teams, Hospital Managers; National Policy Makers.

Data content

Laboratory data: laboratory code; isolate data; isolate sample number (lab); sample type (i.e. blood or CSF); date of sample collection; antibiotic susceptibility testing.

Patient data: patient ID/MRN; sex; date of birth; hospital data; EARSS hospital code; date of admission; hospital department (if available).

Data dictionary

Not available.

National-level identifier variables

No.

Equity stratifiers

No.

Data collection methodology

EARS-Net collects data on the first invasive isolate (from blood or cerebrospinal fluid) of each pathogen per patient per year.

The majority (95%) of the records are received electronically (usually as file downloads from the Laboratory Information Management System; Excel files; or WHONET files, a free software used to manage antimicrobial resistance data). For the remaining 5%, isolate record forms are submitted (but these are being phased out in 2022).
Data is currently collected on an annual basis (note: pre-pandemic, this was on a biannual basis).

Clinical coding scheme

Not in use.

Size of national collection

Approximately 6,200 records created in 2021.

Publication frequency

Annual reports published on HPSC website (www.hpsc.ie).

Accessing data

Data requests can be submitted via hpsc@hse.ie and will be assessed on a case-by-case basis.

Open data portal access

No.

Telephone contact