“…Some hypotheses suggested that pathogens like N. ceranae, V. destructor, bacteria, and several viruses could be responsible of these losses (Cox-Foster et al, 2007;McMenamin & Genersch, 2015;Brutscher et al, 2016;Meana et al, 2017), as well as pesticides (Chauzat et al, 2006). Unfavorable weather conditions and consequent lack of available food, large-scale transhumance practices, nutrition, genetic, or even a combination of several factors are considered some of other potential drivers (Stokstad, 2007;vanEngelsdorp et al, 2009;Ellis et al, 2010;Potts et al, 2010;Ratnieks & Carreck, 2010;Huang, 2012;Francis et al, 2014;Watson & Stallins, 2016;Maggi et al, 2016;Richardson, 2017). Moreover since both honey bee host and pathogens (if involved) are genetically diverse, symptoms and causes of colony losses may well change in different regions (Neumann & Carreck, 2010).…”