CDC MMWR - Pet Rats Source of Seoul Virus (a Type of Hantavirus) - 2017

Considering a new pet rat?  Well, as part of the assessment, you may need to consider Seoul virus.  A report in MMWR reviews a 2017 outbreak of Seoul virus that had been linked to pet Norway rats.  In addition to two individuals who became ill and 183 who were serum positive,   "the investigation identified 31 facilities in 11 states with human and/or rat Seoul virus infections; six facilities also reported exchanging rats with Canadian ratteries."

Seoul virus is a type of hantavirus that causes symptoms ranging from mild influenza-like illness to severe disease with kidney failure and even death.  Norway rats are an asymptomatic carriers for the virus and transmit this virus to humans through contact with contaminated rat urine or droppings, or inhalation of virus particles in dust from contaminated bedding.  This is the first known case of pet rats being the source for human infection.

Norway rats, also known as brown rats, are considered a pest for food operations and can be the source of a number of different pathogens.  With a high birth rate and a diet that can consist of most anything, rat issues in a food facility can be an issue, being very difficult to eradicate once the rodents become established.  So the thought of owning a rat, is difficult for many..  And now, if this Seoul virus is not enough to make you think twice, just have to watch Willard.

CDC MMWR
https://www.cdc.gov/mmwr/volumes/67/wr/mm6704a5.htm?s_cid=mm6704a5_e
Outbreak of Seoul Virus Among Rats and Rat Owners — United States and Canada, 2017