Shigella (all species)

Simian Virus 40

Sin Nombre Virus

Spondweni Virus

St. Louis encephalitis virus

Staphylococcus aureus

Staphylococcus epidermidis

Staphylococcus haemolyticus

Streptococcus mutans

Streptococcus pneumoniae

Streptococcus pyogenes

Tannerella forsythia