AI Article Synopsis
- The study analyzed Varroa destructor infestation in honey bee apiaries around Auckland, New Zealand, using data from 641 apiaries tested between April and June 2000.
- The highest infestation odds were found near transport and storage facilities close to Auckland International Airport, highlighting potential spread routes.
- A mixed-effects geostatistical model indicated that for every kilometer farther from the incursion site, the odds of infestation decreased by 17%, and within affected areas, Varroa spread at an estimated rate of 12 km per year.
Article Abstract
We describe the spatial epidemiology of Varroa destructor infestation among honey bee apiaries in the greater Auckland area of the North Island of New Zealand. The study population was comprised of 641 apiaries located within the boundaries of the study area on 11 April 2000. Cases were those members of the study population declared Varroa-infested on the basis of testing conducted between April and June 2000. The odds of Varroa was highest in apiaries in the area surrounding transport and storage facilities in the vicinity of Auckland International Airport. A mixed-effects geostatistical model, accounting for spatial extra-binomial variation in Varroa prevalence, showed a 17% reduction in the odds of an apiary being Varroa infested for each kilometre increase in the squared distance from the likely site of incursion (95% Bayesian credible interval 7-28%). The pattern of spatially autocorrelated risk that remained after controlling for the effect of distance from the likely incursion site identified areas thought to be 'secondary' foci of Varroa infestation initiated by beekeeper-assisted movement of infested bees. Targeted investigations within these identified areas indicated that the maximum rate of local spread of Varroa was in the order of 12 km/year (interquartile range 10-15 km/year).
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| http://dx.doi.org/10.1016/j.prevetmed.2005.07.007 | DOI Listing |
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