. American bee journal. Bee culture; Bees. September, ItlOT '•57 American Hee Journalj^^^^^gi^sg^j the disease appeared in the colonies within 3 weeks witli syni[)tonis identi- cal willi those produced by feeding the scales of the disease. In the ropy brown mass of the decaying larva; in the disease wliich is produced experi- mentally by feeding pure cultures of BacUlus hirvoc there are found the same large number of spores and rods as when the disease is found in an apiary. Pure cultures of Bacillus hiivac have been olitained from the larva' dead from the disease produced experimentally by fe
. American bee journal. Bee culture; Bees. September, ItlOT '•57 American Hee Journalj^^^^^gi^sg^j the disease appeared in the colonies within 3 weeks witli syni[)tonis identi- cal willi those produced by feeding the scales of the disease. In the ropy brown mass of the decaying larva; in the disease wliich is produced experi- mentally by feeding pure cultures of BacUlus hirvoc there are found the same large number of spores and rods as when the disease is found in an apiary. Pure cultures of Bacillus hiivac have been olitained from the larva' dead from the disease produced experimentally by feeding pure cultures of Bacillus lar- vae. Some ICuropcan investigators of brood diseases omit the symptoms so that it is imposible to tell which disease they are investigating. Their descrip- tions of micro-organisms also are en- tirely too brief. These facts have led to much confusion, and they necessitate much additional work on the part of other investigators. They have also added to the present confusion. From what can be gained from their papers, the author is inclined to believe that Burri has been working with Bacillus larvae and has been referring to it as the"baeillus diflkult of cultivation;" that Maassen has been working with Bacil- lus larvae and has been referring to it as Bacillus brandcnburgiensis, and that von Buttel - Reepen has referred to Bacillus larvae as "B. ; It is hoped that this confusion may soon cease to exist. In the study of Bacillus larvae on this new medium some interesting additional facts have been observed in the mor- phology and cultural characters of this organism wdiich will be given in a bul- letin from this Bureau in the near fu- ture. One fact is mentioned now be- cause it seems to have caused one Ger- man investigator, Dr. Albert Maassen, to fall into error in the interpretation of certain findings. This fact is that this species. Bacillus larvae, produces a large number of giant whips. (Giant whips are at pre
Size: 1849px × 1352px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bo, bookcentury1800, bookdecade1860, booksubjectbees, bookyear1861
