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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, Boumerdes, 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 Boumerdes. 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.

Honey Bees, in addition to their production of honey, pollinate fruit trees and other crops to flowers. Any threat to bees, whether from herbicides, pesticides, diseases or parasites is fraught with consequences not only for the bee, but also for agriculture in general. Numerous reports and studies have reported recent deaths and massive loss of bee colonies (Colony Collapse Discorder). The health of bees is one of the factors that causes this phenomena. The purpose of this article is to review a recent literature on major diseases of bees in different stages of their development. The study presents a synthesis on the main diseases: varroasis and acariosis, American and European foulbrood and viruses. All these pathologies have a negative influence on the colonies, causing symptoms and a decrease in production and mortality

Varroa disease is a parasitic disease of adult bees and brood, due to a blood-sucking external parasitic mite, Varroa destructor. This is one of the most dangerous diseases in Algeria. The purpose of this study is to evaluate the effectiveness of two treatments approved based thymol (Thymovar® and Apiguard®) in the fight against varroa in Algerian conditions and to determine the side effects of these treatments on bee colonies local Apis mellifera intermissa. The test was performed on 80 colonies with two different formulations for each treatment. As the results show in our test, a wide variation in the effectiveness between colonies is recorded for both treatments. The average efficiency for the group of colonies ½ Thymovar strap in two applications stood at 84.43%. This efficiency is lower for the group ½ straps in one application (77.23%). For Apiguard, the average efficiency is 81% for formulation 2 x 25g spaced two weeks, against a 79% rate for the formulation of 2X25 spaced one week. During our tests, with a few dead bees and nymphs found on nappies, we never recorded unusually high bee mortality. Further tests are needed to determine the optimal dose and the best time for treatment.