I've posted to the list in the past that CS kills amoebas, among the many other 
things that it does dispose of.  I just want to pass on my latest amoeba 
adventure:

I ate an old piece of chicken on a Sunday night, and by Monday thought I had a 
case of salmonella.  I started taking industrial doses of Microdyn (a swig out 
of a liter bottle every three hours for three days) and within 36 hours had put 
the "salmonella" at bay.  But then it came back.  So I upped my dosage and the 
number of days I took it, and the same thing happened.  

This went on for 8 weeks, and the only time I felt human was when my CS dose 
was maxxing. I finally went to a lab, and a doctor, and he said my intestinal 
tract was clean as a whistle except for amoebas.  I don't know the life cycle 
span for amoebas, but they apparently were hatching eggs (or whatever amoebas 
do) on a longer cycle than my CS dosing.  Or maybe CS just does not entirely 
kill this particular type of amoebas, just the adults.  But it is clear, given 
the potency of Microdyn, that amoebas are pretty much impervious to CS.  

For the record.