Nosema ceranae in Europe: an emergent type C nosemosis

Nosema ceranae en Europe : émergence d'une nosémose de type C

Mariano Hges , Raquel Martín-Hernández , Aranzazu Meana

In this review, relevant data is presented on an emerging disease of the 21th century in European countries, caused by Nosema ceranae. Within a few years after it was detected in Spain in 2005, the rest of European countries that had technical capacity to differentiate Nosema apis from N. ceranae reported its presence. In a similar way as the initial detection of Varroa in Europe, active scientific work is raising many questions due to the absence of clinical symptoms in infected colonies and a long incubation period of the pathogen. N. ceranae presents a different epidemiological pattern and pathology compared to N. apis. The disease caused by N. ceranae is now named nosemosis type C (COLOSS workshop, 2009) and is characterized by the ability to detect the disease-causing agent throughout the year. The continuous death of highly infected bees, mostly foragers, has a clear effect on colony population and productivity. Although there has been a huge effort in the last years to increase knowledge about this disease, significant research is still needed on epidemiology, pathology, prophyllaxis and treatment.

Mots clés: Nosema ceranae; Nosema apis; Apis mellifera; nosemosis; Europe<br>---<br>Nosema ceranae; nosémose; Europe

Domaines: Zoologie des invertébrés; Biodiversité; Ecologie, Environnement; Science des productions animales

Mariano Hges, Raquel Martín-Hernández, Aranzazu Meana. Nosema ceranae in Europe: an emergent type C nosemosis. Apidologie, 2010, 41 (3), ⟨10.1051/apido/2010019⟩. ⟨hal-00892102⟩