A nationwide field sampling exercise was launched in 2011, to address mounting anecdotal evidence of atypically high honey bee colony mortalities of unexplained origin occurring throughout Portugal. The first approach was to contact 662 beekeepers (≈ 4% of the registered Portuguese beekeepers), via telephone interviews with a view to formulating an 'educated guess' regarding the cases where Nosema apis / Nosema...
Nosemosis is not a recent pathology in Portugal. The etiological agent traditionally associated with it, the microsporidian Nosema apis, is well characterized and was not causing considerable economic damage to the Portuguese apiculture. However, the recent arrival, to the ‘European’ honeybee sphere, of a ‘new’ Nosema species (N. ceranae) has been recurrently considered a relevant contribution to the ‘Colony Co...
To investigate claims of abnormally high honey bee colony mortality in Portugal during 2011, a survey was carried out via telephone interviews. It included 662 (≈ 4%) registered Portuguese beekeepers and followed the basic 'Coloss' questionnaire. Interviewees were selected accounting for total numbers of colonies and the geographical distribution of their apiaries across the country. The 'sampling grid' was set...
Since winter 2006, extensive honey bee colony losses with distinctive features were first reported in the USA ( ‘Colony Collapse Disorder’, CCD). Global research over the past few years attempting to pin point CCD’s most likely causes, recurrently pointed out that no single factor is universally responsible for this disorder. Nevertheless, stressors e.g. the Varroa mite, some ‘new generation’ pesticides, an eve...
Considering the growing number of reports implicating Nosema ceranae in colony morbidity/mortality, it is relevant to clarify the current epidemiology of Nosemosis in Portugal beekeeping context, pinpointing the etiologic agents to the species level and, eventually, identifying possible intra-specific types. About 2% of the registered Portuguese apiaries were sampled in two consecutive years (2011 and 2012)...
A sanidade apícola representa actualmente uma séria preocupação devido a fenómenos de causas, aparentemente, ainda indefinidas, relacionadas com o declínio populacional e mortalidade de abelhas melíferas que vem sendo observado em apiários de diversos países, incluindo alguns em Portugal. Este facto traduz a relevância que tem, actualmente, a realização de análises anatomo-patológicas com o intuito de proporcio...
This work aims at carrying out a survey to assess the prevalence of Nosema sp in Portugal. There has been an increasing number of positively lab-identified cases of Nosema in Bee Pathology Laboratories across the country in recent years. However, the optical microscopy methods that have been used are unreliable to identify the species of Nosema. Considering the growing number of reports implicating Nosema cera...
O presente estudo teve como objectivo principal avaliar a prevalência de doenças em colónias de abelhas melíferas (Apis mellifera iberiensis) localizadas na Zona Controlada da Terra Fria, situada no Nordeste Transmontano. No Laboratório de Patologia Apícola da ESAB/AAPNM, foram efectuadas um total de 396 análises anatomopatológicas recorrendo a técnicas de diagnóstico baseadas na microscopia óptica, de acordo c...
O presente estudo teve como objectivo principal avaliar a prevalência de agentes patogénicos que acometem colónias de abelhas melíferas (Apis mellifera iberiensis) instaladas na Zona Controlada da Terra Quente (ZCTQ) do Nordeste Transmontano. A colheita de amostras foi efectuada no ano civil de 2011, em apiários instalados nos Concelhos de Vila Flor, Mirandela, Macedo de Cavaleiros, Alfândega de Fé e Torre de M...
A Nosemose é uma doença das abelhas melíferas (Apis mellijera L.), cujo agente etiológico tradicional, (o microsporídio unicelular Nosema apis Zander), foi identificado há cerca de cem anos (Paxton, 2010). Considerada uma das patologias mais predominante e prejudicial para as abelhas ocidentais, tem sido intensamente estudada (apesar de nem sempre ser evidente, face a uma sintomatologia relativamente inaparente...
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