Massive rat die off - No idea what the cause is.

[liv]

Here's a few links I found:

http://netvet.wustl.edu/species/rats/ratbact.txt
http://www.criver.com/SiteCollection...pneumoniae.pdf
http://ratguide.com/health/lower_res.../pneumonia.php

Sad to hear what happened to your colony

[Anatopism]

Thanks Liv, those are the same documents I was reading, and both are conflicting. I still have no idea if they are a hazard to human health or to new rats if introduced :/