Vector Type
Rodents
Vector Species Name
Rattus norvegicus
Vector Common Name
Norway Rat, Brown Rat, Wharf Rat, House Rat, Gray Rat, or Sewer Rat

Vector Information

The Norway rat is the most common rat in the US and is found in all 50 states. These rats are nocturnal and can transmit more than 35 diseases to humans. These rats range in length from 13 to 18 inches. They have scruffy brown fur on their backs and legs with gray, yellow, or white fur on their abdomens. Norway rats are nocturnal and tend to stay within 300 feet of their nests. Nests are burrows typically found along building foundations, beneath trash or woodpiles, and in moist areas around gardens. These rats are able to spread disease to humans directly by handling and bites; indirectly by contact with rodent feces, urine, or saliva; indirectly through ticks, mites, or fleas. 

Found In
AL
AK
AZ
AR
CA
CO
CT
DE
FL
GA
HI
ID
IL
IN
IA
KS
KY
LA
ME
MD
MA
MI
MN
MS
MO
MT
NE
NV
NH
NJ
NM
NY
NC
ND
OH
OK
OR
PA
RI
SC
SD
TN
TX
UT
VT
VA
WA
WV
WI
WY
DC

*Disease transmission varies locally. This map depicts where vectors can be found geographically and provides information about diseases these vectors might carry. Vectors might be present in a state or locality, however, and not be carriers of any particular disease. In addition, identified vectors may have a presence in a state, but may not be found throughout that state.