Table 1 Distribution of fungal isolates obtained from the water supply system of a paediatric haematopoietic stem cell unit during a 12-month period
Sampling sites | Number of positive samples/total samples collected (%) | Mould recovered | Total CFU* | Mean (range) concentration CFU/L |
|---|---|---|---|---|
3 (27.4) | Mycelia sterilia | 4 | 1.3 (1–2) | |
Point where the municipal water supply enters the hospital: | 2 (18.2) | Penicillium spp. | 10 | 5 (5–5) |
11 samples collected | 2 (18.2) | Cladosporium spp. | 6 | 3 (2–4) |
1 (9.1) | A. niger sensu lato | 1 | 1 (1–1) | |
1 (9.1) | Trichoderma spp. | 15 | 15 (15–15) | |
Subtotal | 36 | |||
33 (70.2) | Penicillium spp. | 398 | 12.1 (1–55) | |
28 (59.7) | Cladosporium spp. | 262 | 9.4 (2–20) | |
23 (48.9) | Mycelia sterilia | 192 | 8.3(1–25) | |
Tanks: | 10 (21.3) | A. flavus sensu lato | 55 | 5.5 (1–20) |
47 samples collected | 6 (12.8) | A. niger sensu lato | 38 | 6.3(1–15) |
5 (10.6) | Aureobasidium pullulans | 28 | 5.6 (2–15) | |
2 (4.3) | Fusarium solani complex | 40 | 20 (20–20) | |
2 (4.3) | Trichoderma spp. | 20 | 10 (10–10) | |
2 (4.3) | Chrysonilla sitophila | 13 | 6.5 (3–10) | |
2 (4.3) | Purpureocillium lilacinum | 21 | 10.5 (1–20) | |
2 (4.3) | Rhizopus spp. | 55 | 27.5 (5–50) | |
1 (2.1) | A. deflectus sensu lato | 25 | 25 (25–25) | |
1 (2.1) | A. oryzae sensu lato | 1 | 1 (1–1) | |
1 (2.1) | Aspergillus spp. | 20 | 20 (20–20) | |
1 (2.1) | Mucor spp. | 5 | 5 (5–5) | |
Subtotal | 1173 | |||
23 (21.7) | Purpureocillium lilacinum | 563 | 24.5 (2–60) | |
15 (14.2) | Cladosporium spp. | 148 | 9.9 (2–28) | |
14 (13.2) | Fusarium solani complex | 216 | 15.4 (2–80) | |
14 (13.2) | Mycelia sterilia | 94 | 6.7 (2–24) | |
9 (8.5) | Penicillium spp. | 60 | 6.7 (2–24) | |
Tap water from high-risk unit (HSCT): | 6 (5.7) | A. flavus sensu lato | 18 | 3 (2–8) |
106 samples collected | 2 (1.9) | Aureobasidium pullulans | 44 | 22 (4–40) |
1 (0.9) | Aspergillus spp. | 4 | 4 (4–4) | |
1 (0.9) | A. sydowii sensu lato | 2 | 2 (2–2) | |
1 (0.9) | Fusarium dimerum complex | 4 | 4 (4–4) | |
Subtotal | 1153 | |||
TOTAL | 2362 |