Table 1. Attack rates (infected upazila[s] for the infected districts) of avian influenza outbreaks in Bangladesh, 17/64 districts, January–July 2007.
| District | No. farms, infected/total* |
Attack rate (95% CI)† |
|||
|---|---|---|---|---|---|
| Commercial | Backyard | Commercial | Backyard | ||
| Dhaka | 14/744 | 0/0 | 0.019 (0.027–0.009) | ||
| Dinajpur | 0/29 | 1/124,872 | 0.000008 (0.000018–0.000002) | ||
| Gaibandha | 1/69 | 0/52,950 | 0.014 (0.041–0.009) | NA | |
| Gazipur | 3/1,956 | 0/0 | 0.001 (0.0032–0.0002) | NA | |
| Jamalpur | 5/144 | 0/58,962 | 0.034 (0.063–0.005) | NA | |
| Jessore | 2/298 | 3/331,295 | 0.006 (0.014–0.002) | 0.000003 (0.000008–0.000002) | |
| Joypurhat | 0/124 | 1/101,152 | NA | 0.000009 (0.000027–0.00009) | |
| Lalmonirhat | 0/85 | 2/76,582 | NA | 0.00002 (0.00005–0.00001) | |
| Magura | 0/82 | 1/83,607 | NA | 0.00001 (0.00003–0.00001) | |
| Naogaon | 0/109 | 2/80,752 | NA | 0.00002 (0.00005–0.00001) | |
| Narayangonj | 7/925 | 0/0 | 0.007 (0.012–0.002) | NA | |
| Nilphamari | 0/119 | 5/277,984 | NA | 0.00001 (0.00003–0.00001) | |
| Noakhali | 1/97 | 0/0 | 0.010 (0.029–0.009) | NA | |
| Rajbari | 1/395 | 2/311,279 | 0.002 (0.006–0.002) | 0.00006 (0.000014–0.000002) | |
| Rangpur | 0/95 | 2/143,263 | NA | 0.00001 (0.00003–0.00001) | |
| Tangail | 1/227 | 0/91,650 | 0.004 (0.012–0.004) | NA | |
| Thakurgaon |
0/1,137 |
1/73,391 |
|
– |
0.00001 (0.00003–0.00001) |
| Total | 35/5,635 | 20/1,807,739 | 0.006 (0.008–0.004) | 0.00001 (0.000014–0.000006) | |
*Infected, avian influenza–infected farms; total, farms in the infected upazila(s) of a district. †CI, confidence interval; NA, not applicable.