Volume 20, Number 3—March 2014
Research
Monitoring Water Sources for Environmental Reservoirs of Toxigenic Vibrio cholerae O1, Haiti
Table 4
Conditional logistic regression analysis of water quality factors affecting the occurrence Vibrio cholerae O1 and non-O1/non-O139 in aquatic reservoirs, Haiti, April 2012–March 2013
Factor | Units | No. observations | Odds ratio (95% CI) | p value |
---|---|---|---|---|
Presence of V. cholera 01 | ||||
Temperature | 1°C | 47 | 2.14 (1.06–4.31) | 0.033* |
pH | 1 log[H+] | 47 | 0.01 (0.00–1.81) | 0.083 |
Dissolved oxygen | 1 mg/L | 47 | 0.32 (0.08–1.20) | 0.091 |
Total dissolved solids | 100 mg/L | 47 | 1.08 (0.95–1.23) | 0.258 |
Salinity | 1 g/L | 47 | 1.24 (0.86–1.80) | 0.254 |
Conductivity | 100 (µS/cm) | 47 | 1.05 (0.98–1.13) | 0.198 |
Heterotrophic bacteria |
log (CFU/mL) |
47 |
6.00 (0.57–62.78) |
0.135 |
Presence of V. cholera non-01 | ||||
Temperature | 1°C | 154 | 1.36 (1.05–1.76) | 0.02* |
pH | 1 log[H+] | 154 | 0.44 (0.09–2.14) | 0.311 |
Dissolved oxygen | 1 mg/L | 154 | 0.50 (0.32–0.79) | 0.003* |
Total dissolved solids | 100 mg/L | 154 | 0.96 (0.86–1.06) | 0.413 |
Salinity | 1 g/L | 154 | 1.19 (0.80–1.77) | 0.378 |
Conductivity | 100 (µS/cm) | 154 | 0.98 (0.92–1.04) | 0.432 |
Heterotrophic bacteria | log (CFU/mL) | 153 | 2.35 (0.95–5.77) | 0.063 |
*p<0.05 were considered statistically significant.