Table 8.

Effect of drinking water acidification on the occurrence of gross lesions (erosions or/and ulcers) in the upper gastrointestinal tract (oral cavity and esophagus) of birds.

	Experimental Groups						X2 Value
	A	B	C	D	E	F
No lesions	90.90%			37.5%	50%	87.5%
Lesions	9.10%			62.5%	50%	12.5%
Total	100%			100%	100%	100%	0.005

For the period 1–18 days, groups A, B, and C were considered as one (controls), as birds in these groups received only tap water (without any treatment), and the challenge by C. jejuni was not yet applied. Kruskal–Wallis’ test: controls vs. group D: p = 0.022; controls vs. group E: p = 0.020; group D vs. group F: p = 0.022.