Staph. aureus causes vomiting in 16-18 hours. The mechanism of action is
"The mechanism by which the staphylococcus aureus causes vomiting is uncertain but may involve direct neural stimulation of the autonomic nervous system rather than a local effect on G.I.T mucosa".
Stimulation of cy AMP
Vagal stimulation
Stimulation of cy GMP
Acts through ganglioside GM receptor