Pébrine

Pébrine is a disease that affects silkworms, caused by the microsporidian parasite Nosema bombycis. This disease is one of the most significant threats to the sericulture industry, as it can lead to substantial economic losses.

History

Pébrine was first identified in the mid-19th century by the French scientist Louis Pasteur. Pasteur's research into the disease was pivotal in understanding its transmission and developing methods to control it. His work on pébrine also contributed to the broader field of microbiology.

Symptoms

Silkworms infected with pébrine exhibit several symptoms, including:

• Black spots on the body
• Stunted growth
• Lethargy
• Deformed cocoons

The disease can be diagnosed by examining the silkworms or their droppings under a microscope to detect the presence of the parasite.

Transmission

Pébrine is primarily transmitted through the ingestion of spores from contaminated food or surfaces. The spores can also be passed from infected female moths to their eggs, leading to the spread of the disease to the next generation of silkworms.

Prevention and Control

Effective prevention and control of pébrine involve several strategies:

• Regular microscopic examination of silkworms and their environment
• Disinfection of rearing facilities
• Use of disease-free eggs
• Proper disposal of infected silkworms and their waste

Impact on Sericulture

The impact of pébrine on the sericulture industry can be devastating. Infected silkworms produce lower quality silk, and severe outbreaks can lead to the loss of entire crops. The economic implications are significant, particularly in regions where sericulture is a major industry.

Related Pages

• Sericulture
• Louis Pasteur
• Microsporidia
• Silkworm
• Nosema bombycis

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