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Nosema ceranae


It’s “Common Knowledge” that Nosema Causes Dysentery… But is it actually true?

Contents What is dysentery?. 4 So why does everyone think that nosema causes dysentery?. 7 The sad part. 7 Nosema apparently does not cause dysentery. 7 next. 9 citations and notes. 9   It’s “Common Knowledge” that Nosema Causes Dysentery… But is it actually true? First published in ABJ May 2019 Randy Oliver ScientificBeekeeping.com Yesterday […]

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The Seasonality of Nosema Ceranae

First published in: American Bee Journal, April 2015

The Seasonality of Nosema Ceranae Randy Oliver ScientificBeekeeping.com First Published in ABJ in April 2015 Nosema apis has long been known to cause disease primarily during winter and spring. Many misinterpreted Dr. Mariano Higes’ finding that one could detect spores of N. ceranae throughout the year [1] as indicating that infection was no longer seasonal. […]

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“Fried Eggs” Identified!

“Fried Eggs” Identified! Randy Oliver ScientificBeekeeping.com First Published in ABJ in Feb 2012 I mentioned in my previous article that I’ve been seeing an unidentified organism that looked like “fried eggs”  in the guts of bees from my operation in the California foothills (Figure 1).  I sent out requests to a number of researchers for […]

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Sick Bees Part 17b: Nosema – The Smoldering Epidemic

First published in: ABJ April 2012

The Scientific Method Effect of the Invasion Why Would Nosema ceranae Not Cause Problems? Understanding Nosema Understanding the Honey Bee Superorganism Nosema and Energy Metabolism Nosema and Protein Metabolism References Sick Bees 17: Nosema—the Smoldering Epidemic Part B First published in ABJ April 2012 Randy Oliver ScientificBeekeeping.com You may have noticed that I’m doing a […]

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Sick Bees – Part 17b: Nosema – The Smoldering Epidemic

First published in: American Bee Journal, April, 2012

Sick Bees 17: Nosema The Smoldering Epidemic Part B First published in ABJ April 2012 Randy Oliver ScientificBeekeeping.com   The Scientific Method Effect of the Invasion Why Would Nosema ceranae Not Cause Problems? Understanding Nosema Understanding the Honey Bee Superorganism Energy and Protein Metabolism References You may have noticed that I’m doing a sort of […]

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Sick Bees 17A: Nosema – The Smoldering Epidemic

First published in: American Bee Journal, March 2012

Sick Bees 17a: Nosema—the Smoldering Epidemic Randy Oliver ScientificBeekeeping.com   The “Invisible” Infection Something Changed This Decade Historical Prevalence of Nosema Was Nosema ceranae a Game Changer? References The latest National Honey Bee Diseases Survey found that as many as seven out of ten U.S. colonies were infected by Nosema ceranae in late winter and […]

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Sick Bees – Part 16: The “Quick Squash” Method for Determining Nosema Prevalence in a Colony

Infection Prevalence Sequential Sampling A Neat Little Shortcut Validation Summary (completely subject to revision) More Details Next Month Acknowledgements References 2019 Quick Nosema Prevalence Assessment Method First published in ABJ February 2012 Updated March 13, 2019 Randy Oliver Since the discovery of Nosema ceranae, I and many other beekeepers and researchers have been frustrated by […]

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Sick Bees – Part 15: An Improved Method for Nosema Sampling

Author’s Note Samples from Within the Hive Soundbite Science Infection Rate So How Did We Get on the Wrong Track? How to Determine the Colony Infection Rate So What if I Count the Number of Infected Bees out of 10? An Assessment of Our Situation One HUGE Assumption Validation of the Method Update Sequential Sampling […]

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Sick Bees – Part 14: An Update on the “Nosema Cousins”

Worldwide Status and Distribution Ceranae vs. apis Coinfection Seasonality Sample Interpretation What if You’re Dealing with N. apis? Seasonality Recommendations Acknowledgements References Randy Oliver In my last article, I described how to quickly sample for nosema.  So what do the spore counts actually mean as far as colony health is concerned?  I wrote an article […]

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Sick Bees – Part 13: An Update on the “Nosema Cousins”

CONTENTS Worldwide Status and Distribution Ceranae vs. apis Coinfection Seasonality Sample Interpretation What if You’re Dealing with N. apis? Seasonality Recommendations Acknowledgements References Randy Oliver ScientificBeekeeping.com In my last article, I described how to quickly sample for nosema.  So what do the spore counts actually mean as far as colony health is concerned?  I wrote […]

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Sick Bees – Part 13: Simple Microscopy of Nosema for beekeepers

CONTENTS Equipment Needed Taking Bee Samples Processing the Samples Bringing the Spores into Focus Spore Identification Counting the Spores Care and Feeding of your Microscope Coming Up Randy Oliver ScientificBeekeeping.com First published in ABJ November 2011–this article extensively revised in March 2019. It is greatly surprising to me that with the great interest by beekeepers […]

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The “Nosema Twins” – Part 5 Alternative Treatments

The “Nosema Twins” Part 5—Alternative Treatments and Prevention © Randy Oliver ScientificBeekeeping.com First Published in ABJ in April 2008 The more I learn about CCD and other colony maladies, the more I am impressed by the fact that honey bees are currently dealing with a complex of novel parasites, pathogens, vectors, stresses, and immunosuppressants. The […]

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The “Nosema Twins” – Part 4 Treatment

The “Nosema Twins” Part 4 Treatment © Randy Oliver ScientificBeekeeping.com First Published in ABJ in March 2008 Beekeepers had a hard enough time dealing with Nosema apis. What can we do about N. ceranae? Unfortunately, we are currently not very far up the learning curve. The best we can do is to take what we […]

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The “Nosema Twins” – Part 3 Sampling

The “Nosema Twins”  Part 3 –Sampling © Randy Oliver ScientificBeekeeping.com First Published in ABJ in Feb. 2008 My previous articles about Nosema ceranae may have grabbed your attention. Let me be clear that I’m not trying to be alarmist—not all operations have problems with nosema. In fact, I’ve got some colonies doing poorly despite having […]

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The “Nosema Twins” – Part 2 Detection & Microscopy

The “Nosema Twins” – Part 2 Detection & Microscopy © Randy Oliver ScientificBeekeeping.com First Published in ABJ in Jan. 2008 Last fall, getting wind of Nosema ceranae, I carefully collected a few bees from a dozen or so hives from each yard, and sent the whole pooled sample of 500 bees off to a lab […]

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