(a).

	Number (%) of farms	Number (%) of birds
Reason for keeping birds
Commercial	47 (58.8)	71843 (75.3)
Family use (noncommercial)	3 (3.7)	150 (0.2)
Both (semicommercial)	30 (37.5)	23400 (24.5)
Total	80 (100.0)	95393 (100.0)
Poultry type
Broiler	11 (13.8)	3701 (3.9)
Layer	51 (63.8)	46540 (48.8)
Both broiler and layer	17 (21.2)	44672 (46.8)
Cockerel and layer	1 (1.2)	480 (0.5)
Total	80 (100.0)	95393 (100.0)
Number of birds per farm
<200	9 (11.2)	743 (0.8)
200–500	29 (36.2)	10460 (11.0)
501–1000	20 (25.0)	15795 (16.5)
1001–2000	15 (18.8)	24145 (25.3)
2000–10000	5 (6.3)	14950 (15.7)
>10000	2 (2.5)	29300 (30.7)
Total	80 (100.0)	95393 (100.0)
Age of birds at study time
<13 wks	23 (28.8)	26966 (28.3)
13–17 wks	3 (3.7)	1900 (2.0)
≥18 wks	54 (67.5)	66527 (69.7)
Total	80 (100.0)	95393 (100.0)