Bacteria Isolations from Broiler and Layer Chicks in Zambia

Table 1

Proportion of CM mortality cases for the period 1995–2008.

Parameter	Year
	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008	Totals
Total avian disease cases	512	454	644	489	383	211	213	260	152	121	96	87	66	2,829
Total number of CM cases	135	123	166	169	112	56	48	109	78	58	38	32	26	973
Proportion of CM cases (%)	26,37	27,09	25,78	34,56	29,24	26,54	22,54	41,92	51,32	47,93	39,58	36,78	39,39	34,39
Mean flock size (CM farms)	301,95	513,18	521,20	451,13	394,57	350,48	266,94	663,86	572,51	827,84	354,08	435,16	354,38	560,02
Total in affected flocks	40763	63121	86520	76241	44192	19627	12813	72361	44656	48015	13455	13925	9214	544903
Mortality due to CM	19364	38626	45053	18101	16261	14101	4564	13177	14162	19111	4778	8777	2712	218787
CM mortality %	47,5%	61,2%	52,1%	23,7%	36,8%	71,8%	35,6%	18,2%	31,7%	39,8%	35,5%	63,0%	29,4%	40,2%