Distribution of biotypes among <i>S. aureus</i> porcine isolates from the historical periods (1973–1974) and (1991–2003) and contemporary period (2004–2009) belonging to different sequence types (ST) or clonal complexes (CC).

<p>N.D. ST unknown. The <i>spa</i> type was associated to CC30 on the basis of previous work <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0101988#pone.0101988-Hasman1" target="_blank">[15]</a>, <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0101988#pone.0101988-Stegger1" target="_blank">[29]</a>.