Relation entre facteurs environnementaux et densités larvaires d’<i>Ochlerotatus caspius</i>Pallas 1771 et<i>Ochlerotatus detritus</i>Haliday 1833 (Diptera: Culicidae) en Tunisie

Krida, Ghazi; Daoud-Bouattour, Amina; Mahmoudi, Ebrahim; Rhim, Adel; Ghrabi-Gammar, Zeineb; Chermiti, Brahim; Failloux, Anna‐Bella; Bouattour, Ali

doi:10.1080/00379271.2012.10697748

Cited by 3 publications

(1 citation statement)

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“…Surprisingly, AN mosquitoes were characterized by a delay in RVFV transmission; AN populations were more likely to transmit 21 days after feeding on an infectious blood-meal (see Figure 4F ). We suggested that epizootic outbreaks of RVF can be initiated by Aedes or Ochlerotatus mosquitoes which are present in high densities in rural areas [14] , [44] , [45] . Aedes mosquitoes such as Ae.…”

Section: Discussionmentioning

confidence: 99%

Culex pipiens, an Experimental Efficient Vector of West Nile and Rift Valley Fever Viruses in the Maghreb Region

et al. 2012

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West Nile fever (WNF) and Rift Valley fever (RVF) are emerging diseases causing epidemics outside their natural range of distribution. West Nile virus (WNV) circulates widely and harmlessly in the old world among birds as amplifying hosts, and horses and humans as accidental dead-end hosts. Rift Valley fever virus (RVFV) re-emerges periodically in Africa causing massive outbreaks. In the Maghreb, eco-climatic and entomologic conditions are favourable for WNV and RVFV emergence. Both viruses are transmitted by mosquitoes belonging to the Culex pipiens complex. We evaluated the ability of different populations of Cx. pipiens from North Africa to transmit WNV and the avirulent RVFV Clone 13 strain. Mosquitoes collected in Algeria, Morocco, and Tunisia during the summer 2010 were experimentally infected with WNV and RVFV Clone 13 strain at titers of 107.8 and 108.5 plaque forming units/mL, respectively. Disseminated infection and transmission rates were estimated 14–21 days following the exposure to the infectious blood-meal. We show that 14 days after exposure to WNV, all mosquito st developed a high disseminated infection and were able to excrete infectious saliva. However, only 69.2% of mosquito strains developed a disseminated infection with RVFV Clone 13 strain, and among them, 77.8% were able to deliver virus through saliva. Thus, Cx. pipiens from the Maghreb are efficient experimental vectors to transmit WNV and to a lesser extent, RVFV Clone 13 strain. The epidemiologic importance of our findings should be considered in the light of other parameters related to mosquito ecology and biology.

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Section: Discussionmentioning

confidence: 99%

Culex pipiens, an Experimental Efficient Vector of West Nile and Rift Valley Fever Viruses in the Maghreb Region

et al. 2012

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Les moustiques (Diptera, Culicidae) des marais de Smir (nord-ouest du Maroc) : inventaire et biotypologie

Joubari

Louah

Himmi

2014

Bull. Soc. Pathol. Exot.

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The Smir marshes are a favorable environment for the growth of many mosquitoes (Diptera, Culicidae). The inventory of Culicidae species reveals 14 species, is 33% of the species of Morocco, distributed in four genera: Culex, Culiseta, Ochlerotatus and Anopheles (with 5, 2, 5 and 2 species respectively) which Anopheles labranchiae, vector of the agent of the malaria in Morocco until 2004. In this study, we investigated the spatiotemporal mesological affinities and we tried to explain the biotypology of mosquito populations of the site. These analyzes revealed several groups of stations and species according to various parameters, especially salinity.

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A Survey of Aedes (Diptera: Culicidae) Mosquitoes in Tunisia and the Potential Role of Aedes detritus and Aedes caspius in the Transmission of Zika Virus

Ayed

Amraoui

M’ghirbi

et al. 2019

Journal of Medical Entomology

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The present study aimed to update the list of Aedes mosquito species occurring in Tunisia and to test the vector competence of Aedes (Ochlerotatus) caspius (Pallas) and Ae. (Ochlerotatus) detritus (Haliday), the locally most abundant and widespread species, to transmit Zika virus (ZIKV). In 2017–2018, mosquito larvae were collected from 39 different larval habitats in seven bioclimatic zones of Tunisia. The salinity and pH of each breeding site were measured. The survey revealed the presence of 10 Aedes species in Tunisia: Ae. (Stegomyia) albopictus (Skuse), Ae. (Ochlerotatus) berlandi (Séguy), Ae. caspius, Ae. detritus, Ae. (Finlaya) echinus (Edwards), Ae. (Finlaya) geniculatus (Olivier), Ae. (Acartomyia) mariae (Sergent and Sergent), Ae. (Ochlerotatus) pulcritarsis (Rondani), Ae. (Aedimorphus) vexans (Meigen), and Ae. (Fredwardsius) vittatus (Bigot). Of these 10 species, Ae. caspius and Ae. detritus were the most abundant in Tunisia. Aedes detritus and Ae. caspius larvae were reared until the imago stage under insectary conditions to test autogeny. The study showed that Ae. detritus is autogenous and stenogamous and Ae. caspius, anautogenous and eurygamous. Finally, the collected strains of these two species were experimentally infected with the Asian genotype of ZIKV, originally isolated from a patient in April 2014 in New Caledonia, to test their vector competence. Neither of these species was able to transmit ZIKV at 7 and 14 d postexposure. Further investigations are needed to test the competence of other Tunisian mosquito species that may be associated with ZIKV transmission.

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Relation entre facteurs environnementaux et densités larvaires d’Ochlerotatus caspiusPallas 1771 etOchlerotatus detritusHaliday 1833 (Diptera: Culicidae) en Tunisie

Cited by 3 publications

References 28 publications

Culex pipiens, an Experimental Efficient Vector of West Nile and Rift Valley Fever Viruses in the Maghreb Region

Culex pipiens, an Experimental Efficient Vector of West Nile and Rift Valley Fever Viruses in the Maghreb Region

Les moustiques (Diptera, Culicidae) des marais de Smir (nord-ouest du Maroc) : inventaire et biotypologie

A Survey of Aedes (Diptera: Culicidae) Mosquitoes in Tunisia and the Potential Role of Aedes detritus and Aedes caspius in the Transmission of Zika Virus

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