Table 1.

Distribution of some S. aureus genes among human and animal strains.

Gene	Function	Effect	Presence/absence in isolates from		Reference
			Humans	Animals (species), clone
spa	FC binding	Impairment of antibody function	P	A° (poultry), ST5 A° (cattle), ST151	Lowder et al. (2009), Herron-Olson et al. (2007)
chp	Chemotaxis inhibitor	Impairment of host native immunity	P	A (poultry), ST5 A (cattle), ST151	Lowder et al. (2009), Monecke et al. (2007), Sung et al. (2008)
scn	Complement inhibitor	Impairment of host native immunity	P	A (poultry), ST5 A (cattle), ST151	Lowder et al. (2009), Monecke et al. (2007), Sung et al. (2008)
sak	Plasminogen activator	Coagulation of plasma	P	A (cattle), ST151 A (poultry, pigs), ST1	Lowder et al. (2009), Monecke et al. (2007), Sung et al. (2008), Franco et al. (2011)
vWbpSov2	von Willebrand factor-binding (coagulase)^	Coagulation of plasma	A	P (ruminants), CC133	Guinane et al. (2010)

P, present; A, absent.

°Gene disrupted or pseudogene.

^{^}Ruminant variant.