Table 2.
PFGE grouping and % similarity of clinical and environmental strains of Serratia marcescens according to sample and ward.
| PFGE Group | PFGE Subgroup | SM Strain | Examined Sample | Ward | % Similarity |
|---|---|---|---|---|---|
| A | A1 | cs-SM/04 | Blood culture | NICU | 100 |
| A | A1 | es-SM/05 | Washing brush | NICU | |
| A | A1 | cs-SM/06 | CVC | NICU | |
| A | None | cs-SM/13 | Tracheal aspirate | ICU 2 | |
| B | B1 | cs-SM/10 | BAL | General surgery | 95 |
| B | B1 | cs-SM/17 | Tracheal aspirate | ICU 2 | |
| B | B2 | cs-SM/14 | Tracheal aspirate | ICU 1 | ≥96 |
| B | B2 | es-SM/18 | Faucet handle | ICU 1 | |
| B | B2 | es-SM/19 | Book support | ICU 1 | |
| B | B2 | cs-SM/20 | Blood culture | Cardiac surgery | 100 |
| B | None | cs-SM/03 | Blood culture | NICU | |
| B | None | cs-SM/12 | BAL | ICU 2 | |
| B | None | cs-SM/15 | Bronchial excreted | ICU 2 | |
| C | C1 | es-SM/01 | Washbasin | NICU | 97 |
| C | C1 | es-SM/02 | Washbasin | NICU | |
| C | None | cs-SM/07 | Blood culture | Cardiac surgery | |
| C | None | cs-SM/08 | Blood culture | Internal medicine | |
| C | None | cs-SM/09 | Blood culture | Cardiac surgery | |
| C | None | cs-SM/21 | Tracheal aspirate | ICU 1 | |
| Unique | None | cs-SM/11 | Tracheal aspirate | ICU 1 | |
| Unique | None | cs-SM/16 | BAL | General surgery | |
| Unique | None | cs-SM/22 | Urine culture | ICU 1 |
BAL, bronchoalveolar lavage; cs-SM: clinical sample-Serratia marcescens; CVC, central venous catheter; es-SM: environmental sample-Serratia marcescens; /No.: Identification No. of Serratia marcesens strains; PFGE, pulsed-field gel electrophoresis.