Influence of the proximity of American foulbrood cases and apicultural management on the prevalence of Paenibacillus larvae spores in Belgian honey Dirk C. de Graaf, Dominique Vandekerchove, Wim Dobbelaere, Johan E. Peeters and Frans J. JacobsApidologie, 32 6 (2001) 587-599DOI: https://doi.org/10.1051/apido:2001146