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

Table 3

MIC of the organic acids using 0.04 M of Na₂HPO₄ solution, for inoculums of 10, 10², and 10³ of tested strain.

	Inoculum (CFU/ml)	Test doses of organic acids
		2.5%	1.25%	0.625%	0.312%
Tartaric acid	10	−−−	+++	+++	+++
	10^2
	10^3
Citric acid	10	−−−	+++	+++	+++
	10^2
	10^3
Lactic acid	10	−−−	+++	+++	+++
	10^2
	10^3
Acetic acid	10	−−−	−−−	−−−; +++	+++
	10^2
	10^3