TABLE 1.

Ovine fecal and tissue samples used in this study^a

Group	Protocol and laboratory	Type of sample (no. of samples/pool)	No. of fecal samples cultured	No. of tissue samples cultured	No. of independent trials	No. of independent farms	No. of independent submissionsd	Source	Yr
1	Initial protocol; laboratory A	Pooled fecal samples (at most 50)	1,535	0	1	296	343	Expt 3b	1998
2	Fixed protocol; laboratory A	Pooled fecal samples (10-50)	378	0	1	51	57	Expt 2b	1998
3	Fixed protocol; laboratory A	Pooled fecal samples (at most 50)	4,619	0	1	936	936	Unpublished data	1999-2001
4	Final protocol; ampicillin included in some cultures; laboratory B	Pooled fecal samples (5); individual fecal samples; tissue samplesc	2,467	772	1	1	15	Field trial; feces collected every 3 mo; tissues collected at necropsy at 2.5 yr of age	2002-2005
5	Final protocol; laboratory B	Pooled fecal samples (5-50); individual fecal samples; tissue samplesc	2,599	1,805	18	137	172	5 field trials; 6 experimental infection trials; 7 on-farm studies	2002-2008
Total			11,598	2,577	22	1,421	1,523

^aFarms represent the smallest geographic unit of clustering of samples. There were multiple submissions of samples from some farms.

^bDetails are provided in reference 43.

^cIleum and jejunum pooled; intestinal lymph nodes pooled.

^dA submission is a group of samples collected and consigned from the same farm at the same time.