Suitability and limitations of portion-specific abattoir data as part of an early warning system for emerging diseases of swine in Ontario

Table 6 Summary of space-time clusters of high lung condemnation rates

Cluster	# of abattoirs	Radius (km)	Timeframe	# of lungs condemned/pigs	CR/1000 pigs	O/E
1	16	47.72	2001/1/2-2002/2/4	4 096/74 397	55.06	2.32
2	22	36.47	2002/5/31-2002/7/12	130/2 203	54.47	53.67
3	61	285.10	2002/3/15-2002/12/18	669/40 736	16.42	3.20
4	1	0	2001/9/28-2001/10/19	14/23	608.70	77.64
5	1	0	2004/2/17-2004/2/17	5/116	43.10	2708.78

Summary of statistically significant (p < 0.05) space-time clusters* of high partial carcass condemnation rates in Ontario Provincial abattoirs for lungs (2001-2007).**
* SaTScan settings: maximum spatial scanning window specified as 50% of cases; maximum temporal scanning window specified as 50% of the study period.
** Descriptive statistics indicating number of abattoirs in each cluster, cluster radius, cluster timeframe, total lungs condemned per number of market hogs processed (pigs), corresponding condemnation rate per 1000 pigs and observed/expected (O/E) ratio.

ISSN: 1746-6148