Seven genes were absent in all genomes of the strains causing subclinical infection: bovine variant of enterotoxin C (sec-bov), enterotoxin t (set), streptolysin S-associated protein sagB homolog, streptolysin-associated protein sagD homolog, toxic shock syndrome toxin 1 (tst), transcriptional repressor SaPI (stl), serine-rich adhesin for platelet (sasA), and capsular polysaccharide biosynthesis protein Cap5I (S1 Table). This evidence concerns the gene TST and infection.