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The tiger mosquito is still present, according to the pastor institute four (04) wilayas are concerned. These are Tizi-Ouzou, Oran, Algiers and Jijel.
The tiger mosquito proliferates in urban areas, adapts easily to different biotopes and its eggs resist drying for a long time, that is to say the action of drying out the environment in which they find themselves.
In addition, this species is receptive to Chikungunya virus, dengue virus and Zika, alerting the same services.
In Algeria, the incidental presence of the tiger mosquito was reported for the first time, in June 2010 , in Larbaa-Nath-Iraten, in the wilaya of Tizi-Ouzou. Only one specimen had been captured. Since then, no activity of this mosquito has been reported in the region.
In December 2015, following complaints from residents of a strong nuisance caused by mosquitoes, during the summer, IPA entomologists had confirmed the introduction of this species to Ain Turk (Oran).
A strong nuisance of the tiger mosquito was then reported in July 2016 in Algiers by residents of Zonka district, between Birkhadem and Ain Naadja. The entomological survey confirmed the presence of Aedes albopictus at all stages of its development (eggs, larvae and adults). The mosquito control operations were initiated by Hurbal (the institution in charge of urban hygiene and environmental protection in the wilaya of Algiers), and continued until the disappearance of the mosquito, recalls the IPA.
In August 2017 and following the various complaints of residents of the Vieux Kouba district of mosquito bites, an entomological survey was conducted to identify the species. The catches had shown the presence of Aedes albopictus with high density at all stages of its development.
Insecticide treatments with Deltamethrin fumigation had affected all homes where eggs and larvae of tiger mosquitoes were found and had lasted several months. Despite all the efforts of Hurbal's mosquito control service, the tiger mosquito had spread to other parts of the capital, namely Saoula, Khracia and Hussein Dey.
In the east of the country, proliferation of this mosquito was confirmed in August 2017 in Jijel.
Regarding the measures taken or to be undertaken, IPA specialized services believe that the spread of the insect is a "real threat to the wilayas of the Algerian littoral. and wetlands ". "Its larvae develop mainly in breeding places produced by the inhabitants themselves (containers, utensils, used tires, etc. abandoned
and containing water)", they explain, baduring, however, that "the density control of this mosquito is feasible "and that it is sufficient, for this, a" broad awareness of the population. "
For this purpose, a campaign of information and awareness of citizens, through the various media, has already been launched by the IPA team and will continue in the coming weeks.
On the other hand, entomological surveillance using nest traps (to detect the eggs of the mosquito) will be continued in order to "monitor the mosquito's densities in colonized areas and, also, to evaluate the impact of mosquito control."
In case of a positive diagnosis of dengue virus, chikungunya or Zika, a thermo-nebulization treatment using Deltamethrine must be immediately carried out.
The IPA services warn, however, that the insecticide treatments, called "comfort", recommended to reduce the nuisance, "should not be carried out in the long term because they can cause resistance to the insecticides used. "
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