Volume 23, Issue 4
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645



From three different habitats in North Dakota 5,638 deer mice, , were examined for larval infections during 1965 through 1972. Infection was found in 224 (4%) of these mice. Yearly differences in prevalence were evident, with a low of 1.1% during 1971 and a high of 7.8% in 1968. These yearly differences were partially attributable to host density, habitat sampled, and climatic season during which the mice were taken. Since the year was not a legitimate variable, the total over-years data were used to assess the relative influence of sex and age of the host, habitat, and climatic season on the prevalence of the larval parasite. The rate of infection varied significantly with habitat. Seasonally, the highest prevalence was observed during spring (6.5%), followed by summer (5.5%), autumn (2.2%), and winter (2.0%). The prevalence in adult mice was over 10 times greater than in juveniles (4.5% vs. 0.4%), while more males were infected than females (4.6% vs. 3.1%). A factorial analysis of variance showed the order of importance of these variables to be 1) age, 2) habitat, 3) season, 4) age by season, 5) age by habitat, and 6) habitat by season. A mathematical model based on the functions of these variables and accounting for about 74% of the variation is suggested for the prediction of prevalences of larval in this intermediate host.


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