Table 3. Proportion of common bacterial pathogens isolated from HAP patients in China (%).
| Bacterial species | Tertiary hospitala | Secondary hospital (46) | |
|---|---|---|---|
| ≥18 yearsb (18,28) | ≥65 yearsc (45,47,48) | ||
| Acinetobacter baumannii | 20.6–25.7 | 7.9–14.6 | 18.0 |
| Pseudomonas aeruginosa | 18.7–20.0 | 23.8–28.3 | 11.0 |
| Klebsiella pneumoniae | 8.9–14.9 | 5.3–17.1 | 21.0 |
| Staphylococcus aureus | 9.8–12.0 | 8.6–15.0 | 11.0 |
| Escherichia coli | 3.8–7.4 | 9.2–11.8 | 8.0 |
| Enterobacter cloacae | 2.1–4.3 | 2.5 | NA |
| Stenotrophomonas maltophilia | 4.3–6.0 | 1.2–2.6 | NA |
All the studies cited are single center or local retrospective studies except (18,28), which are multi-center, nation-wide, prospective studies. a, the data are mainly from tertiary hospitals, and mostly from retrospective studies. The specimens are mostly sputum. So there are some limitations about these data. b, the population of ≥18 years also includes some people of 65 or older age. The patients were not stratified in terms of age in the original study. c, few data are from secondary hospitals. Only one report on the cases in secondary hospitals was identified with high quality. The proportion of the bacterial pathogens in this study is rounded to the nearest integer. NA, not available.