Intracellular killing of S. aureus subsp. anaerobius strains MVF-84 (●) and RDKA84 (○) by PMN isolated from ewes (A) and lambs (B). Survival of MVF-84 and RDKA84 was determined using dilutional plate counts. Numbers of surviving bacteria are represented as the percentage of the original number of phagocytosed bacteria. Each point represents the mean (± S.D.) of three experiments. Each experiment was performed in triplicate. Error bars indicate confidence level (95%); p values were determined using the Student’s t-test.