Safe drinking water and decent toilets should be basic essentials in every school, everywhere. Unfortunately, it's not the case for millions of children in the world. Take the 500 students at St. John Bosco Gayaza Primary School in Uganda for example. The water source they rely on is an open pool located about one kilometre from their school.
A closer inspection of the bacterial species revealed only few pathogenic species. Of those, most were unable to survive over long periods of time. There was little to no risk for infection. As to the majority of bacteria found, they were common, and harmless, fecal and skin bacteria. Even high frequency use of a toilet could not develop pathogens in high enough levels to cause infection.
Although the finished product may appear almost the same, there are many reasons to consider going with a one-piece or two-piece toilet: A two piece model connects a separate tank and base/seat, which are bolted together on site, while a one piece toilet includes everything already attached seamlessly.