TABLE 4.

Analysis of the nature of putative virulence factors of equine pneumococci

Gene	Virulence factor	Virulence factor present	Identical allele possessed by all equine isolates	Identical allele seen in human isolates (no. of human strains compared)
lytA	Autolysin	—a
ply	Pneumolysin	—a
nanA	Neuraminidase	Yes	Yes	No (20)
nanB	Neuraminidase	Yes	Yes	No (94)
pspA	Surface protein A	Yes	Yesb	NDc
hyl	Hyaluronidase	Yes	Yes	No (122)

^a—, truncated inactive copy. 

^bExcept 501. 

^cND, not done.