I added some thymol to the winter feed for the first time this year. Apart from possible beneficial effects, it stops the sugar from fermenting once it is made up.
The link to the Turkish paper makes for very interesting reading.
Pete L who posts here sometimes has been banging the drum for winter thymol treatment for quite some time now.
The trouble with a nosema infection is that it is not necessarily obvious until you discover that a colony has dwindled to nothing by December. Nosema C. is not accompanied by the dysentery and streaking you get with Nosema Apis.
And as Gavin pointed out there is strong speculation that it may be one of the elements of CCD.
Randy Oliver's site is worth reading for background on nosema.
http://scientificbeekeeping.com/nose...about-nothing/
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