Pébrine
Encyclopedia
Pébrine is a disease of silkworms, which is caused by microsporidia
n parasites, mainly Nosema bombycis and to a lesser extent Variomorpha, Pleistophora and Thelophania species.
The silkworm larvae infected by pébrine are usually covered in brown dots and are unable to spin silkworm thread. Louis Pasteur
was the first one to recognize the cause of this disease when the plague of the disease was spread in France
.
Nosema bombycis (Pébrine) is a microsporidium that kills 100% silkworms hatched from infected eggs.
Nosema bombycis is a microsporidium that can be carried over from worms to moths then eggs and worms again. This microsporidium comes from the food that silkworms eat. If silkworms get this microsporidium in their larva stage, there are no visible symptoms. However, mother moths will pass the microsporidium onto the eggs, and 100% of worms hatching from the infected eggs will die in their larva stage.
Therefore, it is extremely important to rule out all eggs from infected moths by checking the moth’s body fluid under a microscope.
Microsporidia
The microsporidia constitute a phylum of spore-forming unicellular parasites. They were once thought to be protists but are now known to be fungi. Loosely 1500 of the probably more than one million species are named now. Microsporidia are restricted to animal hosts, and all major groups of animals...
n parasites, mainly Nosema bombycis and to a lesser extent Variomorpha, Pleistophora and Thelophania species.
The silkworm larvae infected by pébrine are usually covered in brown dots and are unable to spin silkworm thread. Louis Pasteur
Louis Pasteur
Louis Pasteur was a French chemist and microbiologist born in Dole. He is remembered for his remarkable breakthroughs in the causes and preventions of diseases. His discoveries reduced mortality from puerperal fever, and he created the first vaccine for rabies and anthrax. His experiments...
was the first one to recognize the cause of this disease when the plague of the disease was spread in France
France
The French Republic , The French Republic , The French Republic , (commonly known as France , is a unitary semi-presidential republic in Western Europe with several overseas territories and islands located on other continents and in the Indian, Pacific, and Atlantic oceans. Metropolitan France...
.
Nosema bombycis (Pébrine) is a microsporidium that kills 100% silkworms hatched from infected eggs.
Nosema bombycis is a microsporidium that can be carried over from worms to moths then eggs and worms again. This microsporidium comes from the food that silkworms eat. If silkworms get this microsporidium in their larva stage, there are no visible symptoms. However, mother moths will pass the microsporidium onto the eggs, and 100% of worms hatching from the infected eggs will die in their larva stage.
Therefore, it is extremely important to rule out all eggs from infected moths by checking the moth’s body fluid under a microscope.