Table 3 Duration, ICU involvement and size of outbreaks reported to the SO-ZI/AMR (2012-2021^a), by healthcare setting and microorganism group

Hospitals

Staphylococcus aureus

94

1.4 (0.2–18.5)

16/84 (19)

48

3 (1–18)

Enterococcus faecium

117

2.3 (0.0–22.8)

40/104 (38)

64

9 (2–483)

Enterobacterales species - ESBL

26

2.0 (0.2–13.8)

11/23 (48)

16

14 (4–27)

Enterobacterales species - CPE

14

1.6 (0.3–18.6)

3/13 (23)

3

2 (2–6)

Enterobacterales species - Other

12

1.4 (0.5–2.8)

4/11 (36)

8

6 (4–31)

Acinetobacter species

8

2.0 (0.6–5.7)

3/7 (43)

4

5 (0–12)

Pseudomonas aeruginosa

16

1.8 (0.9–3.5)

11/13 (85)

10

5 (2–50)

Clostridioides difficile

15

2.1 (0.2–9.1)

5/15 (33)

9

8 (5–151)

Norovirus

28

1.3 (0.5–2.0)

0/26 (0)

14

9 (2–74)

SARS-CoV-2

10

1.0 (0.4–1.4)

0/10 (0)

10

15 (0–34)

Other viruses^e

7

1.1 (0.2–1.4)

0/6 (0)

5

7 (1–15)

Other^f

6

1.5 (1.1–5.5)

1/5 (20)

4

7 (3–14)

Long-term care facilities

Staphylococcus aureus

80

1.5 (0.0–8.9)

NA

35

4 (1–42)

Enterococcus faecium

2

2.5 (2.3–2.7)

NA

0

NA

Enterobacterales species - ESBL

13

1.9 (0.7–5.0)

NA

1

4 (4–4)

Enterobacterales species - CPE

4

3.6 (2.4–8.9)

NA

2

4 (2–6)

Enterobacterales species - Other

4

1.4 (0.9–8.7)

NA

2

6 (4–8)

Pseudomonas aeruginosa

1

1.7 (1.7–1.7)

NA

0

NA

Norovirus

2

1.1 (0.4–1.9)

NA

0

NA

SARS-CoV-2

2

1.3 (1.2–1.3)

NA

2

16 (11–20)

Other^g

2

2.7 (0.0–5.5)

NA

1

16 (16–16)