This may sound drastic, but if you have ever seen what it can do to healthy chinchillas, you would understand.
When a chin is diagnosed with Giardia or any thing that is contagious, it is extremely important to ...
1) sanitize everything
2) dispose of those things that are porous and can not be sterilized properly (such as wood)
3) use a hand sanitizer every time you handle your little one and before you handle another chin
4) care for your chins that are healthy first, then the ones that are sick, then change your clothes before you do anything else
5) do not allow a healthy chin to remain in the same cage with one that is injured, ill and/or contagious (see the special note below)
6) do not allow a healthy chin to play in the same area where a sick chin has played until it has been properly sanitized
7) do not use the same dust bath containers, each chin/cage should have it's own dust bath container
Keep in mind that some things that are contagious between chinchillas can also be passed on to other pets and/or humans and visa verse. Giardia and ring worm are just two of these. Always use special care when an animal or human is sick ... it is much easier to care for one than it is to have to care for many. Small children and/or infants should never be allowed near an animal that is contagious. If in doubt ... check it out ... better safe than sorry.
Jo Ann
A special note: Giardia is a parasite that often stays dormant until the opportunity arises to be able to take over and can litterally suck the life out of your chin. If a chin has surgery, a broken leg, or is ill in way that is not contagious, it will still weaken it's system ... once the system has been weakened, the dormant parasite can multiply and can be much more dangerous than the original illness or injury. This is why Giardia is known as the "opportunistic parasite".