Table I.
Overall |
Winter |
Summer |
|||||||
---|---|---|---|---|---|---|---|---|---|
Feedlot | Pos (n) | % Pos | 95% CIc | Pos (n) | % Pos | 95% CIc | Pos (n) | % Pos | 95% CIc |
Campylobacter species | |||||||||
A | 365 (396) | 92 | 89–95 | 182 (200) | 91 | 86–95 | 183 (196) | 93 | 89–96 |
B | 362 (400) | 91 | 87–93 | 180 (200) | 90 | 85–94 | 182 (200) | 91 | 86–95 |
C | 381 (400) | 95 | 93–97 | 197 (200) | 99 | 96–100 | 184 (200) | 92 | 87–95 |
D | 350 (400) | 88 | 84–91 | 172 (200) | 86 | 81–90 | 178 (200) | 89 | 84–93 |
E | 366 (400) | 92 | 88–94 | 180 (200) | 90 | 85–94 | 186 (200) | 93 | 89–96 |
F | 297 (393) | 76 | 71–80 | 154 (200) | 77 | 71–83 | 143 (193) | 74 | 67–80 |
G | 299 (387) | 77 | 73–81 | 145 (200) | 73 | 66–79 | 154 (187) | 82 | 76–88 |
Total | 2420 (2776)d,e | 87 | 86–88 | 1210 (1400) | 86 | 85–88 | 1210 (1376)d,e | 88 | 86–90 |
Campylobacter jejuni | |||||||||
A | 163 (223) | 73 | 67–79 | 24 (40) | 60 | 43–75 | 139 (183) | 76 | 43–75 |
B | 148 (222) | 67 | 60–73 | 24 (40) | 60 | 43–75 | 124 (182) | 68 | 69–82 |
C | 144 (224) | 64 | 58–71 | 28 (40) | 70 | 53–83 | 116 (184) | 63 | 56–70 |
D | 156 (216) | 72 | 66–78 | 25 (38) | 66 | 49–80 | 131 (178) | 74 | 66–80 |
E | 159 (226) | 70 | 64–76 | 24 (40) | 60 | 43–75 | 135 (186) | 73 | 66–79 |
F | 136 (183) | 74 | 67–80 | 28 (40) | 70 | 53–83 | 108 (143) | 76 | 68–82 |
G | 114 (192) | 59 | 52–66 | 24 (39) | 62 | 45–77 | 90 (153) | 59 | 51–67 |
H | 1020 (1486)f,g | 69 | 66–71 | 177 (277)f | 64 | 58–70 | 843 (1209)g | 70 | 67–72 |
Pos — positive.
CI — confidence interval.
Campylobacter positive by culture.
Campylobacter positive isolates identified as C. jejuni using hippurate hydrolysis testing.
Binomial exact confidence interval.
Sample not readable due to mold overgrowth (n = 22).
Missing data (n = 2).
Missing data (n = 3).
Missing data (n = 1).