Figure 1From: Staphylococcus aureus intramammary challenge in non-lactating mammary glands stimulated to rapidly grow and develop with estradiol and progesteroneIntralobular stromal immune cell invasion scoring. The presented quarter lobules were used to characterize the degree of intralobular stromal immune cell invasion observed in saline and Staph. aureus quarter lobules; scores 1–4. A Depicts a score of 1 with no infiltration; B depicts a score of 2 where small isolated pockets of infiltration (arrows) are present; C exemplifies a score of 3 where cellular infiltration affects approximately 1/3 of the lobule; and D depicts a score of 4, marked infiltration affecting more than 2/3 of the lobule. Scale bars = 200 µm.Back to article page