Journal of Parasitology (2009) 95, 198-203

Aaron B.A. Shafer, Geoffrey R. Williams, Dave Shutler, Richard E.L. Rogers and Donald T. Stewart (2009)
Cophylogeny of Nosema (Microsporidia: Nosematidae) and bees (Hymenoptera: Apidae) suggests both cospeciation and a host-switch
Journal of Parasitology 95 (1), 198-203
Abstract: Some microsporidian parasites belonging to the genus Nosema infect bees. Previous phylogenies of these parasites have produced alternative, conflicting relationships. We analyzed separately, and in combination, large and small subunit ribosomal DNA sequences of Nosema species infecting bees under neighbor-joining, maximum parsimony, maximum likelihood, and Bayesian frameworks. We observed a sister relationship between Nosema ceranae and Nosema bombi, with Nosema apis as a basal member to this group. When compared to their respective hosts (Apis cerana, Bombus spp., and A. mellifera), 2 plausible evolutionary scenarios emerged. The first hypothesis involves a common ancestor of N. bombi host-switching from a historical Bombus lineage to A. cerana. The second suggests an ancestral N. ceranae host-switching to a species of Bombus. The reported events offer insight into the evolutionary history of these organisms and may explain host specificity and virulence of Nosema in these economically important insects.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Aaron B.A. Shafer, Dave Shutler

Research topic(s) for pests/diseases/weeds:
identification/taxonomy
molecular biology - genes

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Vairimorpha apis
	Vairimorpha bombi
	Vairimorpha ceranae