FIG. 1.
Percentages of S. aureus DU5883 bacteria present in infected mammary glands. Mammary glands of CD1 lactating mice were inoculated with a half-and-half mixture of S. aureus 8325-4 bacteria (with FnBPs) and S. aureus DU5883 bacteria (without FnBPs) at 6.4 × 102 CFU/gland. The percentages for individual glands are represented by circles. (A) Glands were grouped as suckled and nonsuckled. The medians (indicated values) and the first and third quartiles are represented by bars. By using the Mann-Whitney U test, the difference in the percentages of S. aureus DU5883 bacteria in L4 and R4 glands was found to be statistically significant (P < 0.02). (B) For each mouse, results for the suckled and nonsuckled glands are paired to allow comparison of the proportions of S. aureus DU5883 bacteria found within each animal. The bold line indicates the percentage of DU5883 bacteria in the initial inoculum.