Lactic acid kills <i>C. jejuni in vitro</i>.

<p>An overnight MH broth culture of <i>C. jejuni</i> was inoculated into fresh media to an O.D.₆₀₀ of 0.1. Each broth culture was either untreated, supplemented with 10 mM, 25 mM, or 100 mM lactic acid, or supplemented with hydrochloric acid to achieve a pH equivalent to the lactic acid treated cultures (pH 5.12, 4.32, and 3.46, respectiveley). Samples were serially diluted and plated onto MHB agar for enumeration at 1, 2, 4, and 8 h after incubation. No viable <i>C. jejuni</i> were detected after 1 h when the media was supplemented with 100 mM lactic acid or acidified to pH 3.46 using HCl, therefore these data are not displayed.