Got to love the publicity of a study with a n of 1. Seriously how is this considered research?
A. the bacteria would probably survive the freezing, it is more the molds that would die off and lower the smell.
B. Five different kinds of bacteria can be five strains of E coli when he forgot to wipe or five nasty varied ones.
C. Why no enumeration on the bacteria? There could have been 1 or millions.
Really the biggest thing would be how much moisture was in them when they were stored for the night. I wonder if when he froze them he had an auto defrosting freezer that takes the moisture out of the air?
Also definitely a nasty study that I think they should force on all first year bio students to up their N values. They are not going to get laid anyways.