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Shiga toxin (stx2A) producing Escherichia coli

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

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