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Volume 12, Number 2—February 2006

Research

Epizootiologic Parameters for Plague in Kazakhstan

Michael Begon*Comments to Author , Nikolay Klassovskiy†, Vladimir Ageyev†, Bakhtiar Suleimenov†, Bakhyt Atshabar†, and Malcolm Bennett*
Author affiliations: *University of Liverpool, Liverpool, United Kingdom; †Kazakh Scientific Centre for Quarantine and Zoonotic Diseases, Almaty, Kazakhstan

Main Article

Table 2

Estimates of coefficients, standard errors, and significance based on z tests for optimal generalized linear model for whether animals were seropositive for antibody to Yersinia pestis*

Comparator Effect Estimate Standard error z value p(>|z|) value†
Intercept –1.00 0.19 –5.19 2.07 × 10–7
Adult Subadult –0.73 0.31 –2.37 0.018
Adult Juvenile –1.94 0.61 –3.19 0.0015
Year 1 Year 2 0.15 0.27 0.55 0.58
Year 1 Year 3 0.534 0.53 1.00 0.32
NBT 2.54 0.88 2.88 0.0040
Site 1 Site 2 –0.36 0.26 –1.39 0.16
Not recaptured? Recaptured –0.35 0.17 –2.08 0.037
Adult × year 1 Subadult × year 2 –1.76 0.50 –3.49 0.00049
Adult × year 1 Juvenile × year 2 –0.11 0.66 –0.16 0.87
Adult × year 1 Subadult × year 3 –2.91 1.09 –2.68 0.0073
Adult × year 1 Juvenile × year 3 –11.90 401.1 –0.03 0.98
Adult × NBT Subadult × NBT 7.79 2.25 3.47 0.00053
Adult × NBT Juvenile × NBT 9.47 3.89 2.43 0.015
Year1 × NBT Year 2 × NBT –3.60 1.49 –2.41 0.016
Year1 × NBT Year 3 × NBT –7.59 3.07 –2.47 0.013
Site1 × year1 Site 2 × year 2 0.26 0.33 0.80 0.42
Site1 × year1 Site 2 × year 3 –2.97 1.14 –2.60 0.0094
Site1 × NBT Site 2 × NBT 6.42 1.68 3.81 0.00014

*NBT, nitroblue-tetrazolium.
†Probability of exceeding the z value by chance alone.

Main Article

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