0. Serious Zoonotic
Zoonotic. Can cause severe health concerns and even death in humans. Transmitted through contact with feces, urine, and respiratory secretions. Asymptomatic in rats. Cannot be burned out and all animals in the colony must be euthanized and possibly infected supplies discarded as hazardous waste.
Prevalence Code: A
Zoonotic. Also known as Rat Bite Fever. Can cause severe health concerns and even death in humans. Transmitted through contact with feces, urine, and respiratory secretions. Asymptomatic in rats. Can only be tested via PCR.
Prevalence Code: A
Zoonotic. Potentially deadly to immunocompromised humans. Transmitted through contact with urine and respiratory secretions. Asymptomatic in rats. Cannot be burned out and all animals in the colony must be euthanized and possibly infected supplies discarded as hazardous waste.
Prevalence Code: A
Zoonotic. Can cause minor respiratory symptoms in humans. Transmitted through contact with respiratory secretions. Asymptomatic in rats. Not likely to be burned out due to its high contagiousness.
Prevalence Code: B
1. Risk to Immunocompetent
Species Specific. Transmitted through contact with airborne particles and respiratory secretions. Often leads to severe respiratory illnesses and even death in rats. Can be carried asymptomatically. Can be burned out with a 6 week breeding moratorium, starting after your youngest rats turn 4 weeks old.
Prevalence Code: B
2. Risk to Immunocompromised
Zoonotic. Can cause symptoms in humans with severe immunodeficiency (HIV or transplant patients). Transmitted through ingesting feces and urine. Asymptomatic in immunocompetent rats. Not likely to be burned out due to its transmission method.
Prevalence Code: C
Specific to rodents and some livestock species. Transmitted through direct contact. Can lead to respiratory illness in immunocompromised rats. Can be asymptomatic in immunocompetent rats. Not likely to be burned out due to prevalence and high contagiousness.
Prevalence Code: C
Species Specific. Transmitted through airborne particles and direct contact with the animal and infected materials. Can lead to respiratory illness in immunocompromised rats. Can be asymptomatic in immunocompetent rats. Not likely to be burned out due to prevalence and high contagiousness.
Prevalence Code: D
Species Specific. Transmitted through direct contact with the animal and infected materials. May result in poor growth, diarrhea, and perianal dermatitis in immunocompromised nursing rats. Can be burnt out with an 8 week breeding moratorium, starting after your youngest rats turn 4 weeks old.
Prevalence Code: E
3. Little to No Risk to Well Maintained Colonies
Specific to Rodents. Transmitted through ingesting feces and urine. Appears to be asymptomatic in immunocompetent rats. RTV is newly discovered and still being researched.
Prevalence Code: D
Species Specific. Transmitted through contact with feces, urine, and respiratory secretions. KRV can cause respiratory illness and fertility issues in immunocompromised rats. Generally asymptomatic in immunocompetent rats. Not likely to be burned out due to prevalence and high contagiousness.
Prevalence Code: D
Specific to Rodents. Transmitted through airborne particles and direct contact. Can cause various respiratory and reproductive effects in immunocompromised rats. Can be asymptomatic in immunocompetent rats. Not likely to be burned out due to prevalence and high contagiousness.
Prevalence Code: D
Specific to Rodents. Transmitted through airborne particles, direct contact with the animal and infected materials, feces, urine, and respiratory secretions. Asymptomatic in rats. Not likely to be burned out due to prevalence and high contagiousness.
Prevalence Code: D
Species Specific. Transmitted through respiratory secretions. Asymptomatic in rats. Not likely to be burned out without autoclaving materials.
Prevalence Code: D
Specific to Rodents. Transmitted through airborne particles and contact with respiratory secretions. Asymptomatic in rats. Can be burned out with an 8 week breeding moratorium, starting after your youngest rats turn 4 weeks old.
Prevalence Code: D
Species Specific. Transmitted through contact with feces, urine and respiratory secretions. Only potentially a risk to those who also own mice. Can be burned out with an 8 week breeding moratorium, starting after your youngest rats turn 4 weeks old.
Prevalence Code: D
Prevalence Codes
| A | Uncommon and Unwanted | |
| B | Common but Unwanted | |
| C | Common and Likely | |
| D | Common and Expected | |
| E | Uncommon and Unexpected |