Prekilled Vs Frozen Rodents w.r.t. Health

[Memnoch]

I know this topic has been discussed quite thoroughly but I found it mainly concentrated on the risk of the food biting back.

So here's the question. Other than cost benifits is there any benefit of feeding prekilled or frozen with respects to general health.

I have 5 colonies of breeding mice and 1 colony of rats which are all fed on labdiet rodent chow and their bedding is changed every 5 days. In other words their living conditions are quite sanitary.

Is there any benefit of freezing? Every microbiology book that I've seen states that freezing only slows down bacterial / viral growth.

Is there any documented evidence that freezing does kill endoparasites? (protozoa, thrematodes, cestodes, neamtodes) In addition, will freezing kill their eggs?


Memnoch