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Volume 9, Number 1—January 2003

Research

Seasonal Dynamics of Anaplasma phagocytophila in a Rodent-Tick (Ixodes trianguliceps) System, United Kingdom

Kevin J. Bown*Comments to Author , Michael Begon*, Malcolm Bennett*, Zerai Woldehiwet*, and Nicholas H. Ogden*
Author affiliations: *University of Liverpool, Liverpool, United Kingdom

Main Article

Table 2

Differences in abundance of larval and nymphal Ixodes trianguliceps ticks, counted on rodents of the study, in groups of sample periods deduced from the most parsimonious negative binomial regression models of the variations in tick abundance among sample periodsa

Months chi square df p value
Larvae



Month group 2 vs. 1
5.21
1
<0.03
Month group 3 vs. 1
68.34
1
<0.001
Month group 3 vs. 2
6.25
1
<0.025
Nymphs



Month group 2 vs. 1 53.75 1 <0.001

aRodent ID was included in the models as a random effect. For larvae, month group 1 = March to early May 1997, July and December of 1997, January to late May, and July and August of 1998; month group 2 = February, August and September of 1997, and June of 1998; month group 3 = January, late May, June, October and November of 1997, and September to December 1998. For nymphs, month group 1 = January–April, September, November, and December of both 1997 and 1998; month group 2 = early May to August and October of both 1997 and 1998.

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