Inhibition of <i>C. jejuni</i> by lactobacilli.

<p>Overnight cultures of <i>C. jejuni</i> were inoculated into 10 ml MH soft agar, overlaid on MH agar, and incubated 24 h at 37°C. Supernatants from overnight cultures of <i>Lactobacillus</i> were left untreated, neutralized with 6.25 N NaOH, or heat treated (boiled). Treated supernatants were filter sterilized and spotted onto the <i>C. jejuni</i> inoculated soft agar. <i>Lactobacillus</i> strains used are indicated as follows: (A) <i>L. acidophilus</i>, (B) <i>L. crispatus</i>, (C) <i>L. gallinarum</i> and (D) <i>L. helveticus</i>.