graeme_p - 8:30 pm on Sep 8, 2012 (gmt 0)
Fewer bacteria is not synonymous with cleaner.
If the count was of live bacteria, then sterilised faeces would have none - but that does not make it clean.
Not all bacteria are harmful either.
Most of those in faeces are benign bacteria - which is why faecal transplants (by enema usually, I believe) are done, so many of the bacteria in the toilets will be beneficial to some people.
On the other hand, a lot of bacteria in the environment are beneficial or harmless as well and DO help your immune system develop: which is why modern "hygienic" living (splashing anti-bacterial cleaners everywhere, etc.) has lead to a rise on allergies.