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Table 1 Score distribution of necrotic enteritis lesions in the small intestine of 21-day old broilers

From: C. perfringens challenge reduces matrix metalloproteinase activity in the jejunal mucosa of Eimeria-infected broiler chickens

Group Segment Lesion scorea NE positiveb Average lesion scorec
0 2 3 4 5 6
Control Duodenum 26 0 0 0 0 0 0% (0/26)
Jejunum 26 0 0 0 0 0 0% (0/26)
Ileum 26 0 0 0 0 0 0% (0/26)
  Overall        0% (0/26)
Type A (JIR 4857) Duodenum 27 0 0 0 0 0 0% (0/27)
Jejunum 27 0 0 0 0 0 0% (0/27)
Ileum 27 0 0 0 0 0 0% (0/27)
  Overall        0% (0/27)
Type G (CP56) Duodenum 85 11 6 4 1 0 20.56% (22/107)A 2.77C
Jejunum 19 7 15 46 18 2 82.24% (88/107)B 3.92D
Ileum 89 6 5 6 0 1 16.82% (18/107)A 3.17C
  Overall        85.05% (91/107) 3.91
  1. All birds were challenged with a ten-fold dose of a live attenuated Eimeria vaccine at day 14 and 16 to induce a predisposing coccidiosis infection. On day 18, 19 and 20, birds were challenged with either a pathogenic C. perfringens type G strains (CP56), a commensal C. perfringens type A strain (JIR4857) or sterile bacterial culture medium (control).
  2. aNE lesion scoring of the small intestine was performed as previously described by Keyburn et al. [28].
  3. bNE positive = lesion score ≥ 2.
  4. cAverage lesion score of NE positive birds. Data represents mean ± SE.
  5. dMeans within the same column with different superscripts differ significantly (p < 0.05); A, B binary logistic regression analysis or C, D one-way ANOVA followed by Tukey’s multiple comparisons test.