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The intestinal honey bee parasite Nosema ceranae (Microsporidia) is at the root of colony
losses in some regions while in others its presence causes no direct mortality. This is the
case for Spain and France, respectively. It is hypothesized that differences in honey bee
responses to N. ceranae infection could be due to the degree of virulence of N. ceranae
strains from different geographic origins. This is the case for Spain and France, respectively.
Our results suggest that there is no specific genetic background of the two N. ceranae isolates,
from Spain or France, used in this study.
The genetic origin of the honey
bees could be a key in the understanding of differential
mortality of N. ceranae infected bees. Indeed, selection of
honey bees for low levels of Nosema spp. infection seems to
be successfully achieved in Denmark as a result of years of
selection (Huang et al., 2012) suggesting that different
degrees of host susceptibility exist
Dussaubat, C. ... Comparative study of Nosema ceranae (Microsporidia) isolates from two different geographic origins.
Veterinary Microbiology 162 (2013) 670–678
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