Table 3. Comparisons between mean log10 MPN E. coli concentrations in environmental samples from low-income, high-income, and floating neighborhoods in Dhaka city, 2017.
Neighborhoods | Latrine surface swabb | Soild | Drain watera | Bathing watera | Municipal drinking watera | Non-municipal watera | Surface watera | Producec | Street foodd | Floodwater a |
---|---|---|---|---|---|---|---|---|---|---|
Mean log10 MPN E.coliconcentration (SD) | ||||||||||
Low-income* (N = 40) | 0.22 (0.72) | 2.55 (1.34) | 7.11 (0.86) | 1.92 (1.32) | 1.55 (1.73) | 0.81 (1.19) | 6.21 (1.01) | 3.10 (1.13) | 1.62 (1.11) | 4.86 (0.88) |
High-income† (N = 40) | 0.07 (0.63) | 1.63 (1.16) | 6.95 (0.84) | 0.94 (1.23) | 1.07 (1.41) | 0.18 (0.60) | 4.29 (1.01) | 3.15 (1.37) | 1.91 (1.21) | 4.38 (0.98) |
Floating‡ (N = 20) | 0.42 (0.91) | 3.09 (0.79) | 6.46 (1.11) | 0.99 (1.24) | 0.64 (1.30) | 0.26 (0.73) | 5.40 (1.32) | 3.45 (1.49) | 1.92 (1.28) | 4.51 (1.28) |
Mean log10 MPN E. coli concentration differences between neighborhoods (95% CI) | ||||||||||
Low-income vs. high-income | 0.15 (-0.17, 0.48) |
0.91 (0.39, 1.43)§ |
0.16 (-0.25, 0.56) |
0.98 (0.41, 1.54)§ |
0.48 (-0.20, 1.16) |
0.64 (0.24, 1.04)§ |
1.92 (1.44,2.40)§ |
-0.04 (-0.65, 0.56) |
-0.29 (-0.81, 0.24) |
0.48 (0.03, 0.92)§ |
Low-income vs. floating | -0.19 (-0.59, 0.20) |
-0.54 (-1.18, 0.95) |
0.65 (0.15, 1.14)§ |
0.94 (0.25, 1.63)§ |
0.91 (0.07, 1.73)§ |
0.55 (0.06, 1.04)§ |
0.81 (0.22,0 .40)§ |
-0.35 (-1.09, 0.40) |
-0.29 (-0.94, 0.34) |
0.35 (-0.20, 0.89) |
Floating vs. high-income | 0.35 (-0.05, 0.75) |
1.46 (0.82, 2.10)§ |
-0.49 (-0.98, -0.00) |
0.03 (-0.65,0.72) |
-0.43 (-1.26, 0.40) |
0.08 (- 0.41, 0.57) |
1.10 (0.52, 1.69)§ |
0.30 (-0.44, 1.04) |
0.01 (-0.64, 0.65) |
0.13 (-0.42, 0.67) |
*Low-income neighborhoods: Kalshi, Shampur, Badda, and Hazaribagh
†High-income neighborhoods: Gulshan, Dhanmondi, Motijhil, and Uttarkhan
‡Floating neighborhoods: Gabtoli and Kamalapur neighborhoods
§ mean differences were significantly different between the two comparison groups
aAll water samples including drains were reported as MPN of E.coli/100 mL
bLatrine swabs were reported as MPN of E. coli/swab
cProduce were reported as MPN of E. coli/single serving
dStreet food samples were reported as MPN of E. coli/gram.