34 (AB) In addition to the parameters of time and surface types, the researchers monitored the transfer of the common bacteria Escherichia coli and Staphylococcus aureus from a variety of indoor floor types to toast, pasta, biscuits and a sticky sweet when contact was made from three to 30 seconds.  (AC) What happens next is generally a judgment call depending on several factors—what was dropped, where it was dropped and the victim’s level of hunger.