From: Examining the control of bird flu risks among Nigerian poultry producers: implication for effectiveness of biosecurity knowledge, attitude, and practices (EBKAP)
Free-range (<=50 birds)
Small-scale (51–999 birds)
Medium-scale (1000–5000 birds)
Large-scale (>5000 birds)
All households
Anambra
163
34
5
1
203
Lagos
121
49
23
15
208
Kano
95
66
22
17
200