Nosemosis is a disease that affects honeybees, caused by the microsporidian parasite Nosema apis or Nosema ceranae. This infection can lead to digestive issues in bees, resulting in symptoms like reduced foraging activity, poor hive health, and increased mortality rates. The disease is often spread through contaminated food or feces, making it a concern for beekeepers. Effective management practices, such as maintaining hive cleanliness and monitoring bee health, can help control the spread of nosemosis and protect bee populations.