Evaluation of Antimicrobial Activity of Four Organic Acids Used in Chicks Feed to Control Salmonella typhimurium: Suggestion of Amendment in the Search Standard

Table 2

MIC of organic acids in the presence of neutralizer for inocula of 10, 10², and 10³ of S. typhimurium.

	Strain titer (CFU/ml)	SC (CFU/ml)	Test doses of organic acids (%)
			2.5	1.25	0.625	0.312	0.156	0.078	0.039	0.0195
Acetic acid	10	19	−−−	−−−	−−−	−−−	+++	+++	+++	+++
	10^2	220
	10^3	>300
Citric acid	10	25	−−−	−−−	−−−; +++	+++	+++	+++	+++	+++
	10^2	286
	10^3	>300
Tartaric acid	10	17	−−−	−−−	−−−; +++	+++	+++	+++	+++	+++
	10^2	263
	10^3	>300
Lactic acid	10	34	−−−	−−−	−−−	+++	+++	+++	+++	+++
	10^2	286
	10^3	>300

−−−: absence of Salmonella typhimurium, +++: presence of Salmonella typhimurium, SC: strain control.