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Table 1 Pathological changes and H. meleagridis detection in the cecum and liver

From: Cytokine production and phenotype of Histomonas meleagridis-specific T cells in the chicken

 

Days post-infection

Animal number

Cecum

Liver

LSa

IHCb

LS

IHC

Control

14

1

0

0

15

2

0

0

16

3

0

0

37

4

0

0

38

5

0

0

39

6

0

0

Infected

14

7

3

+

0

15

8

4

0

16

9

2

+

0

37

10

2

+

0

38

11

2

+

0

39

12

2

+

2

  1. aLesion scoring (LS) system from 0 to 4 was applied; Cecum: 0 = no pathological changes; 1 = sporadic inflammation and/or mild thickening of the wall of one cecum; 2 = sporadic inflammation and/or mild thickening of the wall of both ceca; 3 = inflammation of both ceca and thickening of the intestinal wall with liquid fibrin or sporadic fibrinous coagula in the lumen. If only one cecum was affected, then lesion score 2 was applied; 4 = severe inflammation and necrosis in both ceca with compact fibrinous masses in the lumen of the ceca. If only one cecum was affected, then lesion score 3 was applied. Liver: 0 = no pathological changes; 1 = a few single punctiform necrosis up to 1 mm; 2 = single punctiform necrosis disseminated throughout the organ up to 1 mm or a few single punctiform necrosis more than 1 mm; 3 = single punctiform necrosis, disseminated throughout the organ more than 1 mm or some large area necrosis; 4 = confluent necrosis throughout the organ.
  2. bDetection of the parasite in cecum and liver was performed by immunohistochemistry.