anything that kills bacteria but not yeast?

[Marci Swede]

>How about antibiotics? Penicillin, Streptmycin, etc have anti-bacto activities
>depending on the bacto cell wall composition. I presume that the yeast
>(eukaryotes) does not have any cell wall, but a bi-layer lipid cellular
>membrane (am I right?) which should not be affected. Pen/Str are commonly used
>in animal tissue (cell) culture to prevent bacto...

yeast have a cell wall that requires enzymatic removal (zymolase). 
Yeast is closer to a plant, in many respects, than to an animal cell. 
Yeast have a lipid-bilayer as well :0)

Marci