I'd like to thank these sponsors for supporting this website. Just click on their ads to go to their websites.

Mann Lake Ltd

Nosema Summaries and Updates


Nosema ceranae: Kiss of Death or Much Ado about Nothing?

Randy Oliver Once again I’m interrupting a series of articles to update beekeepers on breaking news that has practical applications in bee management. This time the information is about Nosema ceranae, and I felt that the readers of the Journal might benefit from an update on recent research results. Dr. Mariano Higes’ team (from the […]

Read More

The “Nosema Twins” Part 1

Nosema ceranae update The debate continues as to how deadly N. ceranae is. I’ve been corresponding with Antonio Pajuelo (CONSULTORES APÍCOLAS http://www.pajuelo.info/). He notes that in Spain there are citations of collapses of colonies in autumn and winter attributed to lack of fall pollen back at least to 1807. Pajuelo first noticed problems in 2000, […]

Read More

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 OliverScientificBeekeeping.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 an […]

Read More

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 […]

Read More

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 […]

Read More

Sick Bees – Part 16: The “Quick Squash” Method

Infection Prevalence Sequential Sampling A Neat Little Shortcut Validation Summary (completely subject to revision) More Details Next Month Acknowledgements References Randy Oliver Since the discovery of Nosema ceranae, I and many other beekeepers and researchers have been frustrated by the tedium and apparent futility of counting nosema spores, since many of us haven’t seen any […]

Read More

Sick Bees – Part 17: Nosema – The Smoldering Epidemic

First published in: American Bee Journal, April, 2012

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 Part B Randy Oliver You may have noticed that I’m doing a sort of “about face” in my assessment of the impact of Nosema ceranae upon colony health. I […]

Read More


Top