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6th Edition of World Congress on Infectious Diseases

June 24-26, 2024 | Paris, France

June 24 -26, 2024 | Paris, France
Infection 2024

Mohamed Ridha Rjeibi

Speaker at World Congress on Infectious Diseases 2024 - Mohamed Ridha Rjeibi
Veterinary Research Institute of Tunis, Tunisia
Title : Molecular study of Dirofilaria immitis and Dirofilaria repens in dogs from Tunisia


Dirofilaria immitis and Dirofilaria repens are mosquito-borne nematodes which infect primarily dogs as their main definitive hosts. They cause cardiopulmonary (D. immitis) or cutaneous (D. repens) dirofilariasis in canids and other carnivores and can accidentally be transmitted to humans where they can induce a variety of clinical outcomes depending on organ localization. Dirofilaria spp. infection in dogs was assessed using molecular methods (PCR and sequencing) to identify the different Dirofilaria species occurring in 200 dogs from Northern and Central Tunisia. The overall molecular prevalence of Dirofilaria spp. was 17.5% (35/200). The prevalence of D. immitis (14.5%) was significantly higher than for D. repens (3%). Molecular prevalence of D. immitis was significantly higher in suburban compared to urban and rural regions. There was no difference in molecular prevalence of D. immitis or D. repens according to the dogs' (sex or use). Dirofilaria immitis amplicons (accession numbers KR676386) fall into the same clade with D. immitis from China, India and Taiwan. Comparison of the partial sequences of D. repens ITS2 rDNA gene (KR676387) revealed 99.6% similarity with D. repens reported in dogs from USA. It had also 97.6% similarity with D. repens from mosquitoes in Czech Republic.

As dogs are by far the most important reservoir of both Diro?laria species in Tunisian urban and suburban regions, a close collaboration between veterinarians and medical doctors is necessary to: (i) provide veterinarians and medical doctors with consistent regional epidemiological data, (ii) identify hot spot regions where speci?c control efforts should be performed and (iii) implement a control programme adapted to different epidemiological contexts.


Mohamed Ridha Rjeibi studied biochemistry and technobiology at the Faculty of Sciences of Tunisia and graduated as MS in 2010. In 2011, He joined the research group of Prof. Darghouth at the National School of Veterinary Medicine of Sidi Thabet (Tunisia). He received his PhD degree in 2015 at the Faculty of Sciences of Bizerte (Tunisia). In the academic year 2016/2017 he taught as a contract teacher at the Higher Institute of Biotechnology of Beja. In 2017, Mohamed Ridha Rjeibi obtained the position of Associate Professor at Veterinary Research Institute of Tunis. He published more than 30 research articles.