Volume 18, Number 12—December 2012
Letter
Controlling Highly Pathogenic Avian Influenza, Bangladesh
, David Tardif-Douglin, Robert Ryan-Silva, and Rich Magnani
Table
Analysis of pre- and postintervention survey data for biosecurity practices for HPAI (H5N1) virus in Gazipur and Dinajpur districts, Bangladesh, 2009–10*
| Biosecurity practice |
No. persons surveyed (% aware of practice; 95% CI)
|
||||
|---|---|---|---|---|---|
|
Gazipur
|
Dinajpur
|
||||
| Baseline survey, n = 821 | Final survey, n = 300† | Baseline survey, n = 525 | Final survey, n = 209† | ||
| Awareness of bird deaths caused by HPAI | 191 (23; 21–26) | 219 (73; 68–78) | 116 (22; 19–26) | 88 (42; 36–49) | |
| Awareness of bird culling resulting from HPAI | 163 (20; 17–23) | 186 (62; 56–67) | 56 (11; 8–14) | 47 (22; 17–29) | |
| Awareness of HPAI cases among humans | 138 (17; 14–20) | 172 (57; 52–63) | 21 (4; 3–6) | 113 (54; 47–61) | |
| Understand how HPAI is spread | |||||
|
Do not know how HPAI is spread |
209 (25; 23–29) | 42 (14; 11–18) | 286 (54; 50–59) | 21 (10; 7–15) | |
|
Perceive that wild birds are the cause |
466 (57; 53–60) | 207 (69; 64–74)‡ | 134 (26; 22–29) | 154 (74; 67–80) | |
|
Recognize sick poultry as a vector |
43 (5; 4–7) | 140 (47; 41–52) | 53 (10; 8–13) | 61 (29; 23–36) | |
| Awareness of how to protect people | |||||
|
Wear masks |
190 (23; 20–26) | 204 (68; 63–73) | 44 (8; 6–11) | 94 (45; 38–52) | |
|
Wear gloves |
122 (15; 13–17) | 136 (45; 40–50) | 54 (10; 8–13) | 75 (36; 30–43) | |
|
Wash hands |
207(25; 23–29) | 166(55; 50–60) | 58 (11; 9–14) | 139 (67; 60–73) | |
|
Kids should not handle birds |
3 (0; 0.1–1) | 203 (68; 62–73) | 1 (0; 0.01–1) | 54 (26; 20–32) | |
|
No need to protect |
243 (30; 27–33) | 0 (0) | 294 (56; 52–60) | 4 (2; 0.6–5) | |
| Awareness of how to protect birds | |||||
|
Separate chickens and ducks |
28 (3; 3–4) | 92 (31; 26–36) | 18 (3; 2–5) | 36 (17; 13–23) | |
|
Clean and disinfect poultry cages |
288 (35; 32–38) | 182 (61; 55–66) | 39 (7; 5–10) | 99 (47; 41–54) | |
|
Restrict entry to farms |
226 (28; 25–31) | 131(44; 38–49) | 56 (11; 8–14) | 56 (27; 21–33) | |
|
Vaccinate against Newcastle disease |
12 (1; 0.8–2) | 67 (22; 18–27) | 7 (1; 0.6–3) | 47 (22; 17–29) | |
|
Properly dispose of feces |
158 (19; 17–22) | 79 (26; 22–32)§ | 16 (3; 2–5) | 117 (56; 49–63) | |
|
Wear proper clothing |
38 (5; 3–6) | 67 (22; 18–27) | 29 (6; 4–9) | 43 (21; 16–27) | |
|
Clean and disinfect transport vehicles |
35 (4; 3–6) | 105 (35; 30–40) | 10 (2; 1–4) | 20 (10; 6–14) | |
|
Keep dogs and cats away from farms |
92 (11; 9–14) | 99 (33; 28–39) | 22 (4; 3–6) | 33 (16; 11–21) | |
|
Do not know |
170 (21; 18–24) | 46 (15; 12–20)¶ | 267 (51; 47–55) | 2 (1; 0.04–4) | |
| Bird purchase preference | |||||
|
Dead bird (slaughtered at market) |
152 (19; 16–21) | 136 (45; 40–51) | 50 (10; 7–12) | 70 (33; 27–40) | |
|
Live bird (slaughtered at home) |
652 (79; 77–82) | 167 (56; 50–61) | 484 (92; 90–94) | 136 (65; 58–71) | |
*HPAI, highly pathogenic avian influenza.
†Two-sided χ2 test of significance compared with baseline data had p value of <0.0001, except as noted.
‡p = 0.0002.
§p = 0.013.
¶p = 0.049.