Laidoudi Y. auteur aut IRD Bedjaoui S. auteur aut IRD Medkour Hacène auteur aut IRD Latrofa M. S. auteur aut IRD Mekroud A. auteur aut IRD Bitam I. auteur aut IRD Davoust B. auteur aut IRD Otranto D. auteur aut IRD Mediannikov Oleg auteur aut IRD text journalArticle eng text/pdf reformatted digital access The zoonotic Onchocerca lupi and tick-transmitted filarioids of the genus Cercopithifilaria remain less well known due to the difficulties in accessing to skin samples as target tissues. Here, we proposed a molecular approach reliying on multiplex qPCR assays that allow the rapid identification of filarioids from canine blood, skin, and tick samples. This includes two newly developed duplex qPCR tests, the first one targeting filarial and C. grassii DNA (CanFil-C. grassii). and the second qPCR assay designed for the detection of Cercopithifilaria bainae and Cercopithifilaria sp. II DNAs (C. bainae-C.spII). The third one is a triplex TaqMan cox 1 assay targeting DNA of blood microfilariae (e.g., Dirofilaria immitis, Dirofilaria repens and Acanthocheilonema reconditum). The novel duplex qPCRs developed were validated in silico and by screening of known DNA collection. The qPCR assays were also used for screening the blood and tick samples of 72 dogs from Algeria. This allowed the identification of canine filariasis infection with 100% of specificity and 89.47% and 100% of sensitivity from naturally infected blood and tick samples, respectively. The prevalences of 26.39% for D. immitis and 5.56% for both D. repens and A. reconditum were reported in blood and tick samples. Cercopithifilaria DNAs were detected only in tick samples, with a prevalence of 4.17% and 5.56% for C. bainae and Cercopithifilaria sp. II, respectively. Co-infections were diagnosed in 6.94% and 13.89% of blood and tick samples, respectively. Whereas all samples were negative for C. grassii DNA. The use of engorged ticks instead of blood and skin samples could be an easier option for the surveillance of all canine filarioids herein investigated. The multiplex qPCR assays herein validated were shown to be useful in the detection of filarial co-infections by overcoming sequencing of positive samples. specialized Canine filarioses Dirofilaria immitis Dirofilaria repens Cercopithifilaria bainae Cercopithifilaria grassii Cercopithifilaria sp II Onchocerca lupi skin ticks multiplex qPCR 052 080 020 8 11 1671 [15] 2020 https://www.documentation.ird.fr/hor/fdi:010080018 [F B010080018] https://www.documentation.ird.fr/hor/fdi:010080018 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/divers20-12/010080018.pdf IRD - Base Horizon / Pleins textes 2021-01-14 2023-06-21 fdi:010080018 fre