Skip to main content
. 2026 Sep 24;15:120. doi: 10.1186/s13756-026-01821-9

Table 2.

Included studies, separated by pathogen stratum

Publication WHO REGION
Country
Coverage
(type of surveillance) $
Start year
End year
approx. duration
Target species
(sample material)
No. isolates:
-study total
-belonging to stratum
-stratum WGS
Sequencing technology
and lab (central, decentral, external)
Typing methods Availability* of epidemiological information Epidemiological information integrated with genetic differences (threshold) to infer clusters or transmission pathways Public availability of sequence data
Age Gender Diagnosis Outcome HAI/ CAI Ward, clinic Travel Hosp. history
Stratum 1: Carbapenem-resistant or carbapenemase-producing Enterobacterales
Afolayan, 2021 [20]

AFRICAN

Nigeria

Subnational (sentinel, tertiary care hospitals)

2016

2018

36 m

Antimicrobial-resistant Klebsiella spp.

(clinical: blood, CSF, urine)

141

11

11

Illumina de novo

central

MLST, SNP ✓ ✓ ✓ ✗ ✓ ✓ ✗ ✗

Time of isolate recovery; others for visualisation

(ESBL-Kp: 1–3 SNPs)

Yes
Milenkov, 2021 [46]

AFRICAN

Madagascar

Subnational (sentinel, maternity wards)

2018

2019

9 m

ESBL- producing Enterobacterales

(screening)

170

1

1

Illumina + ONT de novo

central

MLST, SNP ✓ ✓ ✓ ✗ ✗ ✗ ✗ ✗

Unclear; isolate origin for visualisation

(ESBL-Ec: <10 SNPs)

Yes
Karlowsky, 2021 [35]

AMERICAS

Canada

National (comprehensive, tertiary care hospitals)

2007

2018

144 m

ESBL-positive Escherichia coli and Klebsiella pneumoniae

(clinical)

812

23

23

Illumina de novo

central

MLST ✓ ✓ ✗ ✗ ✗ ✓ ✗ ✗ NR (NA) Yes
Saavedra, 2021 [51]

AMERICAS

Colombia

National (comprehensive, NRL)

2013

2017

60 m

Carbapenem-resistant Klebsiella pneumoniae

(clinical)

425

425

425

Illumina de novo

central

MLST, SNP ✓ ✓ ✓ ✗ ✗ ✗ ✗ ✗ Unclear (NR) Yes
Bulens, 2023 [23]

AMERICAS

USA

Subnational (sentinel, MuGSI)

2012

2015

36 m

Carbapenem-resistant Enterobacterales (clinical)

1499

1499

12

Illumina de novo

central

MLST ✓ ✓ ✓ ✓ ✓ ✗ ✓ ✓ NR (NA) No
Lapp, 2023 [39]

AMERICAS

USA

Subnational (comprehensive, MuGSI and statewide CRE surveillance)

2016

2018

36 m

Carbapenem-resistant (blaKPC-carrying) Enterobacterales (clinical)

255

255

255

Illumina de novo

decentral

MLST, SNP ✓ ✓ ☑ ✗ ✗ ✓ ✗ ✓

Comorbidities, geographic

(≤ 5, 10, and 15 SNVs)

Yes
Al-Farsi, 2020 [21]

EAST MEDITERRANEAN

Oman

National (comprehensive)

2015

2015

10 m

Escherichia coli with reduced susceptibility to carbapenems (clinical and screening)

35

35

35

Illumina de novo

central

MLST, cgMLST, wgMLST, SNP ✓ ✓ ✓ ✓ ✗ ✓ ☑ ✓

Hospital, ward, isolation date, hospitalisation and travel history

(Ec: ≤10 SNPs)

Yes
Sonnevend, 2022 [55]

EAST MEDITERRANEAN

United Arab Emirates

National (sentinel)

2018

2019

9 m

Carbapenem-resistant Enterobacterales (clinical and screening)

504

504

504

Illumina de novo

central

MLST, cgMLST ✓ ✓ ✗ ✗ ✗ ✓ ✗ ✗

Hospital

(Kp: ≤15 allelic differences)

Yes
Do Nascimento, 2017 [28]

EUROPE

UK

Subnational (comprehensive)

2015

2016

18 m

Enteroaggregative Escherichia coli (clinical: faecal samples)

155

1

1

Illumina mapping

central

MLST ✓ ✓ ✗ ✗ ✗ ✗ ☑ ✗ NR (NA) Yes
Roer, 2017 [50]

EUROPE

Denmark

National (comprehensive)

2014

2015

24 m

Third-generation cephalosporin-resistant Escherichia coli (blood culture)

552

5

5

Illumina de novo

central

MLST, SNP ✓ ✓ ✓ ✗ ✗ ✗ ✗ ✗

Unclear; isolate origin for visualisation

(Ec: ≤10 SNPs)

No
Hammerum, 2020 [32]

EUROPE

Denmark

National (comprehensive)

2016

2019

44 m

OXA-244-producing Escherichia coli (clinical and screening)

24

24

24

Illumina de novo

central

MLST, cgMLST ✓ ✓ ✗ ✗ ✗ ✓ ✓ ✓

Travel and hospitalisation history, place of sampling and residence,

(Ec: ≤10 allelic differences)

Yes
Taylor, 2021 [56]

EUROPE

UK

Subnational (sentinel)

2016

2016

6 m

Amikacin-resistant Enterobacterales (clinical and screening)

271

135

135

Illumina de novo

central

MLST ✓ ✓ ✓ ✗ ✗ ✗ ☑ ✗ NR (NA) No
Canada-Garcia, 2022 [24]

EUROPE

Spain

National

(sentinel)

2019

2019

4 m

Carbapenemase-producing Klebsiella pneumoniae and Escherichia coli (clinical)

403

403

403

Illumina de novo

central

MLST, SNP, cgMLST ✓ ✓ ✗ ✗ ✗ ✗ ✗ ✗

Unclear

(Kp: ≤10 SNPs,

≤ 5 allelic differences)

Yes
Hans, 2023 [33]

EUROPE

Germany

National (comprehensive)

2013

2019

84 m

NDM-5-producing Escherichia coli (clinical and screening)

329

329

222

Illumina de novo

central

MLST, cgMLST, SNP ✓ ✓ ✗ ✗ ✗ ☑ ✗ ✗

Geography

(Ec: ≤100 SNPs)

Yes
Ljungquist, 2023 [43]

EUROPE

Norway

National (comprehensive)

2015

2021

84 m

Carbapenemase-producing Enterobacterales (clinical and screening)

389

389

389

Illumina de novo

central

MLST, cgMLST ✓ ✓ ✗ ✗ ✗ ✗ ✓ ✗ Hospital, travel history (NR) Yes
Raffelsberger, 2023 [49]

EUROPE

Norway

Subnational (comprehensive)

2015

2016

19 m

ESBL-producing Escherichia coli and Klebsiella pneumoniae (screening)

4999

2

2

Illumina de novo

external

MLST, SNP ✓ ✓ ✓ ✗ ✗ ✗ ✓ ✓

NR

(Ec: ≤17 SNPs)

Yes
Nagaraj, 2021 [47]

SOUTH EAST ASIA

India

National (sentinel)

2013

2019

84 m

Carbapenem resistant Klebsiella pneumoniae (clinical)

344

280

280

Illumina de novo

NR

MLST, SNP ✓ ✓ ✓ ✗ ✓ ✓ ✗ ✗ Hospital, inpatient/outpatient, age (Kp: ≤3 SNPs) Yes
Marimuthu, 2017 [44]

WEST PACIFIC

Singapore

National (comprehensive)

2013

2015

17 m

Carbapenem-resistant Enterobacteriaceae (clinical and screening)

430

430

206

Illumina de novo

central

MLST, SNP ✓ ✓ ✓ ✓ ✗ ✓ ✓ ✓

Hospital

(Ec: ≤58 SNPs, Kp: ≤151 SNPs)

Yes
Sherry, 2019 [52]

WEST PACIFIC

Australia

Subnational (comprehensive)

2012

2016

60 m

Carbapenemase-producing Enterobacterales (clinical and screening)

361

361

361

Illumina de novo

central

MLST, SNP ✓ ✓ ✗ ✗ ✓ ✓ ✓ ✓

“Data from concurrent epidemiologic investigations” (Hospital, hospitalisation and travel history)

(≤ 23 SNPs)

Yes
Argimon, 2020 [22]

WEST PACIFIC

Philippines

National

(sentinel)

2013

2014

24 m

Carbapenemase- and/or ESBL-producing Klebsiella pneumoniae and

Escherichia coli (clinical)

805

~ 420

~ 420

Illumina de novo

central

MLST, SNP ✓ ✗ ✗ ✗ ✓ ✓ ✗ ✗ Hospital, ward isolation date, HAI/CAI, age (threshold unclear) Yes
Carlos, 2021 [25]

WEST PACIFIC

Philippines

National

(sentinel)

2015

2017

36 m

Carbapenem-, extended spectrum beta-lactam-, and cephalosporin-resistant Klebsiella pneumoniae (clinical)

259

139

139

Illumina de novo

central

MLST, SNP ✓ ✓ ✗ ✗ ✓ ✓ ✗ ✗

Hospital, ward, sampling time, age, HAI/CAI

(threshold unclear)

Yes
Lane, 2021 [38]

WEST PACIFIC

Australia

Subnational (comprehensive)

2016

2018

36 m

Carbapenemase-producing Enterobacterales (clinical and screening)

402

402

402

Illumina de novo

central

MLST, SNP ✓ ✓ ✓ ✓ ✗ ✓ ✓ ✓

Hospital, hospitalisation and travel history and eventual additional outbreak investigation

(threshold unclear)

Yes
Forde, 2023 [30]

WEST PACIFIC

Australia

Subnational (comprehensive)

2017

2021

50 m

Carbapenemase-producing Enterobacterales (clinical and screening)

2660

293

293

Illumina de novo

central

MLST, SNP ✓ ✗ ✗ ✗ ✓ ✓ ✗ ✗

Hospital, HAI/CAI

(≤ 5 SNPs/Mb)

Yes
Ko, 2023 [37]

WEST PACIFIC

China

National

(sentinel)

2019

2020

12 m

Carbapenemase-producing Escherichia coli (clinical)

31

31

13

ONT de novo

NR

MLST, cgMLST ✓ ✓ ✗ ✗ ✗ ✗ ✗ ✗ Unclear (NR) No
Li, 2023 [42]

WEST PACIFIC

China

Subnational (sentinel)

2017

2022

72

Carbapenem-resistant Klebsiella pneumoniae (clinical)

662

662

101

Illumina de novo

external

MLST, SNP ✓ ✓ ✗ ✗ ✗ ✗ ✗ ✗

Unclear, age, sex, isolation region and year for visualisation

(NR)

Yes
Stratum 2: Carbapenem-resistant or carbapenemase-producing Acinetobacter spp.
Perovic, 2022 [48]

AFRICAN

South Africa

Subnational (sentinel)

2017

2019

30 m

Acinetobacter baumannii complex (focus on colistin resistant) (blood culture)

4822

1786

38

Illumina de novo

central

MLST, SNP ✓ ✓ ✓ ✓ ✗ ✓ ✗ ✓

Hospital and age for visualisation

(NR)

Yes
Adams, 2020 [19]

AMERICAS

Argentina

National

(sentinel, NRL)

2014

2017

48 m

NDM-producing Acinetobacter spp. (clinical)

40

40

40

Illumina de novo

NR

MLST, SNP ✓ ✓ ✗ ✗ ✗ ✓ ✗ ✗

Hospital but no cluster definition

(threshold unclear)

Yes
Iovleva, 2022 [34]

AMERICAS

USA

Subnational (comprehensive for study network)

2017

2018

14 m

Carbapenem-resistant Acinetobacter baumannii

(clinical and screening)

155

155

115

Illumina + ONT de novo

central

MLST, SNP ✓ ✓ ✓ ✓ ✗ ✓ ✗ ✗

Hospital, study site

(≤ 10 SNPs)

Yes
Taylor, 2021 [56]

EUROPE

UK

Subnational (sentinel)

2016

2016

6 m

Amikacin- resistant Acinetobacter baumannii (clinical and screening)

271

16

16

Illumina de novo

central

MLST ✓ ✓ ✓ ✗ ✗ ✗ ☑ ✗ NR (NA) No
Argimon, 2020 [22]

WEST PACIFIC

Philippines

National

(sentinel)

2013

2014

24 m

Carbapenemase-producing Acinetobacter baumannii (clinical)

805

108

108

Illumina de novo

central

MLST, SNP ✓ ✗ ✗ ✗ ✓ ✓ ✗ ✗ Hospital, ward isolation date, HAI/CAI, age (threshold unclear) Yes
Chilam, 2021 [26]

WEST PACIFIC

Philippines

National

(sentinel)

2013

2014

24 m

Acinetobacter baumannii (focus on carbapenem-resistant) (clinical)

5254

445

117

Illumina de novo

central

MLST, SNP ✓ ✓ ✓ ✗ ✓ ✓ ✗ ✗

Hospital

(threshold unclear)

Yes
Sherry, 2021 [53]

WEST PACIFIC

Australia

Subnational (unclear)

2017

2017

2 m

Carbapenem-resistant Acinetobacter spp.

(clinical)

408

2

2

Illumina de novo

central

MLST, SNP ✓ ✓ ✗ ✗ ✓ ✓ ✗ ✓ Hospitalisation history, wards, admission dates (≤ 25 SNPs) Yes
Forde, 2023 [30]

WEST PACIFIC

Australia

Subnational (comprehensive)

2017

2021

50 m

Carbapenem-resistant Acinetobacter baumannii (clinical and screening)

2660

35

35

Illumina de novo

central

MLST, SNP ✓ ✗ ✗ ✗ ✓ ✓ ✗ ✗

Hospital, HAI/CAI

(≤ 5 SNPs/Mb)

Yes
Stratum 3: Methicillin-resistant Staphylococcus aureus
Lee, 2017 [40]

AMERICAS

USA

Subnational (comprehensive, Ten primary care clinics)

2007

2015

108 m

Staphylococcus aureus (MRSA and MSSA) (clinical and screening)

144

71

71

Illumina mapping

NR

MLST, SNP ✓ ✓ ✓ ✗ ✗ ✗ ✗ ✗

Place of sampling

(NR)

Yes
Guthrie, 2020 [31]

AMERICAS

Canada

Subnational (sentinel)

2010 and 2016

24 m

Methicillin-Resistant Staphylococcus aureus (clinical)

426

426

426

Illumina mapping

central

MLST, SNP ✓ ✓ ✓ ✓ ✓ ✓ ✗ ✗ Age, hospital, HAI/CAI (≤ 10 SNPs) Yes
Di Gregorio, 2023 [27]

AMERICAS

South America

International (sentinel)

2019

2019

7 m

Staphylococcus aureus (MRSA and MSSA) (blood culture)

443

182

165

Illumina de novo

central

MLST, SNP ✓ ✓ ✓ ✗ ✓ ✗ ✗ ✗ Country, HAI/CAI (threshold unclear) Yes
Toleman, 2019 [57]

EUROPE

UK

Subnational (comprehensive)

2012

2013

12 m

Methicillin-resistant Staphylococcus aureus (MRSA) (blood culture)

425

425

425

Illumina de novo

central

MLST, SNP ✓ ✓ ✗ ✗ ✓ ✗ ✗ ✗ NR Yes
Enger, 2022 [29]

EUROPE

Norway

National (comprehensive)

2008

2016

108 m

Methicillin-resistant Staphylococcus aureus (clinical and screening)

475

475

108

Illumina de novo

central

MLST, SNP ✓ ✓ ✓ ✗ ✓ ✗ ☑ ✓ Birth country and HAI/CAI for visualisation (NR) Yes
van der Mee-Marquet, 2022 [58]

EUROPE

France

Subnational (sentinel)

2021

2021

8 m

Staphylococcus aureus (MRSA and MSSA) (blood culture)

53

5

5

Illumina NR MLST, (SNP unclear) ✓ ✓ ✓ ✓ ✗ ✓ ✗ ✗ NR No
Masim, 2021 [45]

WEST PACIFIC

Philippines

National

(sentinel)

2013

2014

24 m

Methicillin-resistant Staphylococcus aureus (clinical)

6211

3549

118

Illumina de novo

external

MLST, SNP ✓ ✓ ✗ ✗ ✓ ✓ ✗ ✗ Unclear (NR) Yes
Sherry, 2021 [53]

WEST PACIFIC

Australia

Subnational (unclear)

2017

2017

2 m

Methicillin-resistant Staphylococcus aureus (clinical and screening)

408

88

88

Illumina de novo

central

MLST, SNP ✓ ✓ ✗ ✗ ✓ ✓ ✗ ✓

Hospitalisation history, wards, admission dates

(≤ 15 SNPs)

Yes
Sherry, 2022 [54]

WEST PACIFIC

Australia

Subnational (comprehensive)

2017

2018

14 m

Methicillin-resistant Staphylococcus aureus (clinical and screening)

2275

811

811

Illumina de novo

central

MLST, SNP ✓ ✓ ✗ ✗ ✓ ✓ ✗ ✓ Hospitalisation history, wards, admission dates (≤ 15 SNPs) Yes
Yamaguchi, 2022 [59]

WEST PACIFIC

Japan

National (comprehensive)

2010

2018

56 m**

Methicillin-resistant Staphylococcus aureus (clinical: skin and pus)

1770

1770

92

Illumina de novo

external

MLST, SNP ✓ ✓ ✗ ✗ ✗ ✗ ✗ ✗ Unclear (NR) Yes
Forde, 2023 [30]

WEST PACIFIC

Australia

Subnational (comprehensive)

2017

2021

50 m

Methicillin-resistant Staphylococcus aureus (clinical and screening)

2660

620

620

Illumina de novo

central

MLST, SNP ✓ ✗ ✗ ✗ ✓ ✓ ✗ ✗

Hospital, HAI/CAI

(≤ 5 SNPs/Mb)

Yes
Stratum 4: Vancomycin-resistant Enterococci
Kleinman, 2023 [36]

AMERICAS

Canada

National

(sentinel)

2013

2018

72 m

Vancomycin-resistant Enterococcus ST1478 (blood culture)

115

115

115

Illumina de novo

central

MLST, SNP ✓ ✓ ✓ ✓ ✓ ✓ ✗ ✓

Patient movement data (hospital, ward)

(< 20 SNVs)

No
Lee, 2020 [41]

WEST PACIFIC

Australia

National

(sentinel)

2015

2017

36 m

Vancomycin-resistant Enterococcus faecium (blood culture)

1025

537

537

Illumina de novo

central

MLST, SNP ✓ ✓ ✗ ✓ ✗ ✗ ✗ ✗ Unclear (NR) Yes
Sherry, 2021 [53]

WEST PACIFIC

Australia

Subnational (unclear)

2017

2017

2 m

vanA vancomycin-

resistant Enterococcus faecium (clinical and screening)

408

64

64

Illumina de novo

central

MLST, SNP ✓ ✓ ✗ ✗ ✓ ✓ ✗ ✓

Hospitalisation history, ward, admission dates

(≤ 25 SNPs)

Yes
Sherry, 2022 [54]

WEST PACIFIC

Australia

Subnational (comprehensive)

2017

2018

14 m

vanA vancomycin-

resistant Enterococcus faecium (clinical and screening)

2275

346

346

Illumina de novo

central

MLST, SNP ✓ ✓ ✗ ✗ ✓ ✓ ✗ ✓ Hospitalisation history, wards, admission dates (≤ 25 SNPs) Yes
Forde, 2023 [30]

WEST PACIFIC

Australia

Subnational (comprehensive)

2017

2021

50 m

Vancomycin-resistant enterococci (clinical and screening)

2660

433

433

Illumina de novo

central

MLST, SNP ✓ ✗ ✗ ✗ ✓ ✓ ✗ ✗

Hospital, HAI/CAI

(≤ 5 SNPs/Mb)

Yes

Abbreviations: bp = base pair; cg = core genome; CSF = cerebrospinal fluid; Ec = Escherichia coli; HAI/ CAI = hospital- /community- acquired infection; Hosp. history = hospitalisation history; Kp = Klebsiella pneumoniae; m = month; med = medium; MLST = multi-locus sequence typing; MuGSI = Multi-site Gram-negative Surveillance Initiative; NR = not reported; PFGE = pulsed field gel electrophoresis; SCCmec = staphylococcal cassette chromosome mec; SNP = single nucleotide polymorphism; target = target pathogen (i.e. MRSA); target WGS = target pathogens submitted for WGS; VNTR = variable number tandem repeat; WGS = whole genome sequencing; WHO = World Health Organization

$ “Sentinel” refers to surveillance in a selected sample of sites that do not cover all areas in the national or sub-national region; “comprehensive” refers to surveillance that is potentially including all sites within the covered area

*✓ Available; ☑ Available but reportedly < 80% complete; ✗ Not reported/not available

**Intermittent periods from 2010 to 2018: 2010 (February to September), 2012 (February 2012 to January 2013), 2014 (January to December), 2016

(January to December), and 2018 (January to December)