Volume 14, Issue 4
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645



The three species of ( and ) from two geographically distinct areas of the State of Hawaii have been examined to determine their comparative degree of resistance to plague. Rodents from the enzootic Hamakua District were compared to like numbers from “plague-free” Oahu, in tests with a virulent strain of originally isolated in Hawaii.

After a small sample of 60 rodents was used to establish baselines for the main trials, two samples of 180 rats each (30 rats of each species from each island) were tested. Results of these procedures indicated that the and from the Hamakua District were significantly more resistant to plague than were their Oahu counterparts. No such difference was seen in the samples. The observed differences were apparently due to geographical factors associated with the presence or absence of enzootic plague, as the resistances could not be correlated to the sex or age of the animals or to the season of collection.


Article metrics loading...

The graphs shown below represent data from March 2017
Loading full text...

Full text loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error