Table 4.

Enumeration of Salmonella on swine carcasses by plant, season, and both plant and season

Enumeration by plant and/or season	Prescald carcass						Preevisceration carcass					Chilled final carcass
	No. sampled	% with enumerable Salmonellaa	Frequency of enumeration (log CFU/100 cm2)				No. sampled	% with enumerable Salmonella	Frequency of enumeration (log CFU/100 cm2)			No. sampled	% with enumerable Salmonella	Frequency of enumeration (log CFU/100 cm2)
			1.4 to 1.9	2.0 to 2.9	3.0 to 3.9	4.0 to 4.9			−0.8 to −0.1	0.0 to 0.9	1.0 to 1.9			−0.8 to −0.1	0.0 to 0.9	1.0 to 1.9
Enumeration by plant
Plant A	760	48.7 A	136	115	101	18	760	7.9 A	46	13	1	760	0.5 A	3	1	0
Plant B	760	26.7 B	143	55	5	0	760	1.7 B	9	2	2	760	0.7 A	3	0	2
Enumeration by season
Summer	380	17.6 C	62	5	0	0	380	1.6 B	3	1	2	380	0.3 A	1	0	0
Fall	380	29.7 B	49	46	18	0	380	0.3 B	1	0	0	380	0.0 A	0	0	0
Winter	380	47.1 A	68	79	29	3	380	7.6 A	24	5	0	380	1.3 A	3	0	2
Spring	380	56.3 A	100	40	59	15	380	9.7 A	27	9	1	380	0.8 A	2	1	0
Enumeration by season for plant A
Summer	190	26.3 C	48	2	0	0	190	0.5 B	1	0	0	190	0.5 A	1	0	0
Fall	190	55.8 AB	42	46	18	0	190	0.0 B	0	0	0	190	0.0 A	0	0	0
Winter	190	47.4 B	21	41	25	3	190	14.2 A	22	5	0	190	0.0 A	0	0	0
Spring	190	65.3 A	25	26	58	15	190	16.8 A	23	8	1	190	1.6 A	2	1	0
Enumeration by season for plant B
Summer	190	8.9 B	14	3	0	0	190	2.6 A	2	1	2	190	0.0 A	0	0	0
Fall	190	3.7 B	7	0	0	0	190	0.5 A	1	0	0	190	0.0 A	0	0	0
Winter	190	46.8 A	47	38	4	0	190	1.1 A	2	0	0	190	2.6 A	3	0	2
Spring	190	47.4 A	75	14	1	0	190	2.6 A	4	1	0	190	0.0 A	0	0	0

^aPercent enumerable Salmonella values in the same column and subheading that do not have a common letter are statistically different (P < 0.01).