Nosema ceranae has infected Apis mellifera in Europe since at least 1998 and may be more virulent than Nosema apis

Robert Paxton, J. Klee, S. Korpela, I. Fries

Research output: Contribution to journalArticlepeer-review

295 Citations (Scopus)

Abstract

Nosema ceranae, a microsporidian formerly regarded as confined to its Asiatic host Apis cerana, has recently been shown to parasitise Apis mellifera and to have spread throughout most of the world in the past few years. Using a temporal sequence of N = 28 Nosema isolates from Finland from 1986-2006, we now find (i) that N. ceranae has been present in Europe since at least 1998 and (ii) that it has increased in frequency across this time period relative to Nosema apis, possibly leading to higher mean spore loads per bee. We then present results of a single laboratory infection experiment in which we directly compare the virulence of N. apis with N. ceranae. Though lacking replication, our results suggest (iii) that both parasites build up to equal numbers per bee by day 14 post infection but that (iv) N. ceranae induces significantly higher mortality relative to N. apis.
Original languageEnglish
Pages (from-to)558-565
Number of pages8
JournalAPIDOLOGIE
Volume38
Issue number6
DOIs
Publication statusPublished - Nov 2007

ASJC Scopus subject areas

  • Insect Science

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