Publications Internationales

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Author: search.filters.author.Adjlane, NoureddineHas files: No

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    Journal of Apicultural Research Multi-country loss rates of honey bee colonies during winter 2016/2017 from the COLOSS survey
    (2018) Brodschneider, Robert; Alison J., Gray; Adjlane, Noureddine; Ballis, Alexis
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    Next-generation sequence data demonstrate several pathogenic bee viruses in Middle East and African honey bee subspecies (Apis mellifera syriaca, Apis mellifera intermissa) as well as their cohabiting pathogenic mites (Varroa destructor)
    (Springer link, 2018) Haddad, Nizar Jamal; Horth, Lisa; Alshagour, Banan; Adjlane, Noureddine
    RNA viruses are associated with honey bee (Apis mellifera) colony losses in many parts of the world. Their consequences may be exacerbated when the ectoparasite mite Varroa destructor is present in hives. While evidence of pathogenic, viral-induced disease is abundant in western honey bees (Apis mellifera mellifera) from many parts of the world, less information exists regarding the pathogen load of Apis mellifera syriaca and Apis mellifera intermissa, honey bees from the Middle East and North Africa (MENA) that play substantial roles in regional beekeeping. Here, we used next-generation sequencing to evaluate the viral populations of these subspecies and their associated mites. We found that both A. m. syriaca and A. m. intermissa, as well as the Varroa mites infecting their colonies, bear a suite of RNA viruses including major pathogenic viruses like Deformed wing virus, Acute bee paralysis virus, Black queen cell virus and Sacbrood virus, and less common viruses (e.g., bee Macula-like virus and Apis mellifera filamentous virus). The two native honey bee MENA subspecies have acquired different but overlapping suites of pathogens, which also differ, but overlap, with the suites detected in the mites. The presence of plant viruses suggests that they were acquired from foraging for pollen and nectar. Phylogenetic analysis of the above common pathogenic RNA viruses showed unexpected genetic relationships with other known strains, indicative of import to MENA from outside of the region. Our findings indicate that it is important to carefully consider the impact of the movement of queens and mobile colonies, and the effects such movement have, on the transmission of disease
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    Prevalence of Acariosis in Honeybee
    (2019) Adjlane, Noureddine; Nizar, Jamal Haddad; Habbi, Cherif Assia
    This study was aimed to investigate the prevalence of acariosis in honeybee colonies of Apis mellifera intermissa in Algeria. To this end, samples of bee colonies of the Apis mellifera intermissa race were taken from the brood frames for assessment of acariosis induced by Acarapis woodi in five provinces in Algeria viz., Tizi Ouzou, Blida, Boumerdès, Algiers, and Bouira. A sample of 100 to 150 bees spread over three to five colonies for each apiary was observed. Presence of this parasite was examined using laboratory and microscopic methods that entailed dissecting the thoraxes of the bees to expose their tracheas. Each trachea was examined under a microscope. In the case of the infected bees, the mites appear as small oval bodies attached to the transparent walls of the tracheas. According to the examination and analysis results, two cases of acariosis were observed in two colonies in the same apiary in the province of Boumerdès. In Bouira province, only one colony infested by the mite was found. Meantime, no single case of acariosis was detected in the provinces of Blida, Algiers, and Tizi Ouzou. These results indicate low prevalence of this disease in Algeria. For the infected apiaries, there is so far no 100% effective treatment for acariosis. Once this disease is present in the apiary, the beekeeper must control its development at a level that will not affect the health of the colony
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    Varroa destructor (Acari: Parasitiformes:Varroidae) a dangerous parasite of honey bees (Hymenoptera: Apidae)
    (Association for Advancement of Entomology, 2020) Adjlane, Noureddine; Jamal Haddad, Nizar
    The honeybee is an essential element of environmental balance in the world, particularly for its role in the pollination of many plant species. It also has other interests such as the production of honey, propolis, royal jelly and wax. Among several diseases on honey bees, the most dangerous is varroosis and threaten different species of honeybee population. Varroosis is caused by an external parasitic mite, Varroa destructor which parasites both bees and brood. It causes enormous damage to the colony and is a gateway to other viral and bacterial diseases. Information on the influence of this disease on colonies, symptoms and pathogenic actions, reproduction, development cycle and treatment methods viz chemical, natural, biological and biotechnical against Varroa are discussed.