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Distribution of phage types (a), PFGE types (b), and binary types (c) over sources of isolation. Only types that were represented by five or more S. aureus isolates are shown. Asterisks indicate significant differences between frequencies of isolation from teat skin and milk (∗, P ≤ 0.01; ∗∗, P ≤ 0.001; ∗∗∗, P ≤ 0.0001). When nothing is indicated, differences were not significant. NT, not typeable.
