Volume 14, Number 12—December 2008
Dispatch
Avian Influenza Outbreaks in Chickens, Bangladesh
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.