Volume 14, Number 3—March 2008
Dispatch
Gastroenteritis Outbreak at Holiday Resort, Central Italy
, Vincenza Prencipe*, Alessandro Ripani*, Cristina Di Francesco*, Claudia Casaccia*, Silvia Crudeli†, Nicola Ferri*, Armando Giovannini*, Maria Maddalena Marconi‡, Cristina Marfoglia*, Valeria Melai*, Giovanni Savini*, Giampiero Scortichini*, Primula Semprini*, and Franco Maria Ruggeri†
Table 2
Microbiologic analysis of water used within holiday resort, central Italy, case-control study, June–September 2003
| Test | Results, positive/no. samples examined (%) |
||
|---|---|---|---|
| Drinking water | Non–drinking water* | Swimming pool water | |
| Microbial count at 36°C* | 4/49 (8) | 8/20 (40) | 0/7 |
| Microbial count at 22°C† | 4/49 (8) | 9/20 (45) | 0/7 |
| Clostridium perfringens‡ | 0/49 | 5/20 (25) | Not tested |
| Total coliforms§ | 0/49 | 8/19 (42) | Not tested |
| Escherichia coli¶ | 0/49 | 0/20 | 0/7 |
| Enterococcii# | 2/49 (4) | 7/20 (35) | 0/7 |
| Pseudomonas aeruginosa** | 9/49 (18) | 5/20 (25) | 1/7 (14) |
| Salmonella spp.†† | 0/13 | 1/17 (6) | 0/5 |
| Vibrio cholerae‡‡ | Not tested | 0/9 | Not tested |
| Coagulase-positive staphylococci (S. aureus and other species)§§ | Not tested | Not tested | 3/7 (43) |
| Norovirus antigen¶¶ | Not tested | 3/3 (100) | Not tested |
*Limit of acceptability: drinking water = 100 CFU/mL; swimming pool water = <100 CFU/mL.
†Limit of acceptability: drinking water = 100 CFU/mL; swimming pool water = <200 CFU/mL.
‡Limit of acceptability: drinking water = 0 CFU/mL.
§Limit of acceptability: drinking water = 0 CFU/100 mL.
¶Limit of acceptability: drinking water = 0 CFU/mL; swimming pool water = 0 CFU/100 mL.
#Limit of acceptability: drinking water = 0 CFU/100 mL; swimming pool water = 0 CFU/100 mL.
**Limit of acceptability: drinking water = 0 CFU/100 mL; swimming pool water = <1 CFU/100 mL.
††Limit of acceptability: drinking water = absent/100 mL;.swimming pool water = absent/100 mL.
‡‡Limit of acceptability: drinking water = absent/100 mL.
§§Limit of acceptability: swimming pool water = <1 CFU/100 mL.
¶¶Limit of acceptability: drinking water = sample volume examined.