Table 1. Pathogens identified in reported HAI-outbreaks (n = 578), Germany, 1 November 2011 to 31 October 2012.
| Pathogen | Outbreaks | Cases | Colonisations | SymptomaticInfections | Fatalities | |
| Virus | norovirus | 414 (96%) | 7384 (11.5; 2–229) | 0 | 7380 (11.5; 2–123) | 4 (0; 0–2) |
| rotavirus | 10 (3%) | 96 (5; 3–29) | 0 | 95 (4.5; 3–29) | 1 (0; 0–1) | |
| respiratory syncytialvirus | 2 (1%) | 23 (11.5; 5–18) | 0 | 20 (10; 5–15) | 3 (0–3) | |
| influenza-A-virus | 2 (1%) | 26 (13; 7–19) | 0 | 26 (13; 7–19) | 0 (0) | |
| adenovirus | 2 (1%) | 62 (31; 22–40) | 0 | 62 (31; 22–40) | 0 (0) | |
| virus total | 430 (100%) | 7591 (11; 2–229) | 0 | 7583 (11; 2–229) | 8 (0; 0–3) | |
| Bacteria | Clostridium difficile | 27 (25%) | 119 (3; 2–15) | 0 (0) | 105 (3; 1–13) | 16 (0; 0–4) |
| Klebsiella spp. | 21 (19%) | 212 (5; 2–63) | 55 (0; 0–21) | 85 (3; 2–15) | 19 (0; 0–6) | |
| Staphylococcus spp. | 21 (19%) | 102 (4; 2–15) | 19 (0; 0–10) | 77 (3; 1–11) | 5 (0; 0–2) | |
| Acinetobacter spp. | 10 (9%) | 39 (4; 2–6) | 7 (0; 0–4) | 31 (3; 1–5) | 1 (0; 0–1) | |
| Enterococcus spp. | 10 (9%) | 43 (3; 2–17) | 13 (0; 0–10) | 29 (2,5; 1–7) | 4 (0; 0–2) | |
| Escherichia coli | 7 (7%) | 19 (2; 2–5) | 0 | 17 (2; 1–5) | 2 (0; 0–1) | |
| Serratia marcescens | 4 (4%) | 34 (4.5; 3–22) | 15 (0.5; 0–14) | 16 (3; 3–7) | 2 (0.5; 0–1) | |
| Enterobacter spp. | 3 (3%) | 15 (4; 2–9) | 0 | 14 (3; 2–9) | 1 (0.5; 0–1) | |
| Stenotrophomonas spp. | 3 (3%) | 8 (3; 2–3) | 0 (0) | 8 (3; 2–3) | 1 (0; 0–1) | |
| Mycoplasma pneumoniae | 1 (1%) | 3 (3) | 0 (0) | 3 (3) | 0 (0) | |
| Pseudomonas aeruginosa | 1 (1%) | 15 (15) | 0 (0) | 15 (15) | 0 (0) | |
| bacteria total | 108 (100%) | 609 (4; 2–63) | 109 (0; 0–21) | 400 (3; 0–15) | 51 (0; 0–6) | |
| Fungi | Aspergillus spp. | 2 (100%) | 19 (8–11) | 6 | 13 (2–11) | 0 (0) |
| fungi total | 2 (100%) | 19 (8–11) | 6 | 13 (2–11) | 0 (0) | |
| Pathogen unknown | total | 38 (100%) | 514 (2–52) | 0 | 507 (1–52) | 8 (0–6) |
Median and range as min. and max. within outbreaks. Note: Numbers of colonised, symptomatic infected and fatalities may not add up to number of all cases (see discussion). Percentages may not add up to total 100% due to rounding.