TABLE 2.

Sample preparation

Sample group	Sampling point	No. of samples	Vol collected (ml)/sample	Vol (ml) used for culture-based analysis/sample	Campylobacter enrichment (10 ml/sample)
Processing	Prescald	10	500	20	No
	Postplucker	10	500	20	No
	Pre-immersion chill	10	500	20	No
	Post-immersion chill	10	500	20	Yes
	Post-air chill	10	500	20	Yes
Shelf life	Start of shelf life	15	500	20	Yes
	End of shelf life	15	500	20	Yes
Environmental	Scald water	4	2,000	10	Yes
	Immersion chill water	4	2,000	10	Yes
	Air in air chill room	1	15	2	No
	Wall in air chill rooma ,b	1	100	10	Yes
	Shackles in air chill rooma ,c	2	400, 600	10	Yes

^aSamples collected by using sponges. An additional 25 ml of BPW was added to each Whirl-Pak Speci-Sponge in the laboratory after sampling, yielding a mixture of 50 ml/sponge.

^bTwo sponges swabbed the air chill room wall were pooled as one sample.

^cTen sponges hung on random empty shackles moving in the air chill room, which were collected into two sealed bags. Due to time and practice in the air chill room during sampling, one bag contained four sponges, and the other contained six sponges. Consequently, this resulted in two samples collected with volumes of 400 and 600 ml, respectively.