Results 101 to 110 of about 406 (125)

Interspecific geographic distribution and variation of the pathogens Nosema bombi and Crithidia species in United States bumble bee populations

Journal of Invertebrate Pathology, 2012
Several bumble bee (Bombus) species in North America have undergone range reductions and rapid declines in relative abundance. Pathogens have been suggested as causal factors, however, baseline data on pathogen distributions in a large number of bumble bee species have not been available to test this hypothesis. In a nationwide survey of the US, nearly
Cordes, Nils, Huang, Wei-Fone, Strange, James P., Cameron, Sydney A., Griswold, Terry L., Lozier, Jeffrey D., Solter, Leellen F.   +6 more
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A field experiment on the effect of Nosema bombi in colonies of the bumblebee Bombus terrestris

Ecological Entomology, 2008
Abstract 1.  Nosema bombi is a microsporidian parasite of bumblebees that is of potentially great ecological and economic importance. Nosema bombi has been shown to have detrimental fitness effects on the bumblebee
OLIVER OTTI, PAUL SCHMID‐HEMPEL
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Nosema bombi, a microsporidian pathogen of the bumble bee Bombus terrestris (L.)

New Zealand Journal of Zoology, 1995
Abstract The developmental cycle and morphology of a microsporidian pathogen Nosema bombi Fantham & Porter 1914, of the bumble bee, Bombus terrestris, are described. In experimentally infected bees, spherical meronts were the first
Catherine A. McIvor, Louise A. Malone
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Specific and sensitive detection of Nosema bombi (Microsporidia: Nosematidae) in bumble bees (Bombus spp.; Hymenoptera: Apidae) by PCR of partial rRNA gene sequences

Journal of Invertebrate Pathology, 2006
A polymerase chain reaction (PCR) based method was developed for the specific and sensitive diagnosis of the microsporidian parasite Nosema bombi in bumble bees (Bombus spp.). Four primer pairs, amplifying ribosomal RNA (rRNA) gene fragments, were tested on N.
Wee Tek Tay, Robert Paxton
exaly   +4 more sources

PCR reveals high prevalence of non/low sporulating Nosema bombi (microsporidia) infections in bumble bees (Bombus) in Northern Arizona

Journal of Invertebrate Pathology, 2014
About 20% of bumble bee species are in decline in North America, and the microsporidian pathogen, Nosema bombi, has been correlated with these declines. We conducted a comprehensive survey of N. bombi infections in the bumble bee communities throughout the flight season along an elevation gradient in Northern Arizona.
Elizabeth A, Blaker, James P, Strange, Rosalind R, James, Fernando P, Monroy, Neil S, Cobb   +4 more
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Molecular characterization ofNosema bombi(Microsporidia: Nosematidae) and a note on its sites of infection inBombus terrestris(Hymenoptera: Apoidea)

Journal of Apicultural Research, 2001
SUMMARYInvestigations of queen, worker and male bumble bees (Bombus terrestris) showed that all individuals became infected with Nosema bombi. Infections were found in Malpighian tubules, thorax muscles, fat body tissue and nerve tissue, including the brain.
Fries, I., De Ruijter, A., Paxton, Robert, Da Silva, A.J., Slemenda, S.B., Pieniazek, N.J.   +5 more
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Identification of Nosema bombi Fantham and Porter 1914 (Microsporidia) in Bombus impatiens and Bombus sandersoni from Great Smoky Mountains National Park (USA)

Journal of Invertebrate Pathology, 2010
Ninety three bumble bees belonging to the genus Bombus, subgenus Pyrobombus (three Bombus vagans, seven Bombus bimaculatus, 17 B. sandersoni and 68 B. impatiens) from Great Smoky Mountains National Park were examined for microsporidia. Light microscopy of calcoflour and trichrome-stained smears, and PCR revealed infection with N.
Yuliya Y, Sokolova, Igor M, Sokolov, Christopher E, Carlton   +2 more
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The Status ofBombus occidentalisandB. moderatusin Alaska with Special Focus onNosema bombiIncidence

Northwest Science, 2012
Abstract Four North American bumble bee species in the subgenus Bombus sensu stricto, including Bombus occidentalis (Hymenoptera: Apidae), are experiencing dramatic declines in population abundance, geographic range and genetic diversity. The prevailing hypothesis concerning their decline is the transmission of the intracellular fungal pathogen. Nosema
Jonathan B. Koch, James P. Strange
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Complete rRNA Gene Sequences Reveal that the Microsporidium Nosema bombi Infects Diverse Bumblebee (Bombus spp.) Hosts and Contains Multiple Polymorphic Sites

Journal of Eukaryotic Microbiology, 2005
Abstract. Characterisation of microsporidian species and differentiation among genetic variants of the same species has typically relied on ribosomal RNA (rRNA) gene sequences. We characterised the entire rRNA gene of a microsporidium from 11 isolates representing eight different European bumblebee (Bombus) species.
Wee Tek, Tay, Elaine M, O'Mahony, Robert J, Paxton   +2 more
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Infection and transmission ofNosema bombiinBombus terrestriscolonies and its effect on hibernation, mating and colony founding

Apidologie, 2008
The impact of the microsporidium Nosema bombi on Bombus terrestris was studied by recording mating, hibernation success, protein titre in haemolymph, weight change during hibernation, and colony founding of queens that were inoculated with N. bombi in the larval phase. Infection with N. bombi was diagnosed in 36% of B.
openaire   +1 more source