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Younes L, Barré-Cardi H, Bedjaoui S, Ayhan N, Varloud M, Mediannikov O, Otranto D, Davoust B. Dirofilaria immitis and Dirofilaria repens in mosquitoes from Corsica Island, France. Parasit Vectors 2021; 14:427. [PMID: 34446069 PMCID: PMC8390287 DOI: 10.1186/s13071-021-04931-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Accepted: 08/05/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Dirofilaria immitis and Dirofilaria repens are the main causative agents of heartworm disease and subcutaneous dirofilariasis in domestic and wild canids, respectively. Both pathogens have zoonotic potential and are transmitted by mosquitoes. The present study aimed to determine the transmission period, prevalence and diversity of Dirofilaria spp. vectors from endemic areas of Corsica (France). METHODS A monthly point data model based on average temperature recorded by four meteorological stations during 2017 was used to calculate the Dirofilaria transmission period. From June to September 2017, female mosquitoes (n = 1802) were captured using Biogents® Sentinel 2 traps lured with carbon dioxide and BG-Lure™ or octanol. Mosquitoes were identified to species level, pooled accordingly, and screened using multiplex real-time qPCR to detect D. immitis and D. repens. RESULTS The monthly point data model showed the possible transmission of Dirofilaria spp. from the third week in May to the last week in October in the studied area. Mosquitoes were identified as Ochlerotatus caspius (n = 1432), Aedes albopictus (n = 199), Culex pipiens sensu lato (n = 165) and Aedes vexans (n = 6) and were grouped into 109 pools (from 1 to 27 specimens, mean 11.4 ± 0.7), of which 16 scored positive for Dirofilaria spp. (i.e., n = 13; estimated infection rate [EIR] = 1.1% for D. immitis and n = 3; EIR = 0.2% for D. repens). Specifically, 6 (i.e., EIR = 3.8%) of 15 pools of Ae. albopictus were positive for D. immitis, 2 of 14 of Cx. pipiens s.l. were positive for D. immitis and D. repens, respectively, and 8 of 77 pools of Oc. caspius were positive for D. immitis (i.e., n = 6; EIR = 0.4%) and D. repens (i.e., 2; EIR = 0.1%). The highest mosquito infection rate was recorded in July (EIR = 2.5%), then in June (EIR = 1.3%) and September (EIR = 0.6%). CONCLUSIONS The data suggest that both Dirofilaria species are endemic and occur possibly in sympatry in the studied area in Corsica, highlighting the need to implement preventive chemoprophylaxis and vector control strategies to reduce the risk of these filarioids in dog and human populations.
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Affiliation(s)
- Laidoudi Younes
- Aix Marseille Univ, IRD, AP-HM, MEPHI, Marseille, France.,IHU Méditerranée Infection, Marseille, France.,Department of Veterinary Medicine, University of Bari, Valenzano, Bari, Italy
| | | | - Samia Bedjaoui
- Laboratory of Food Hygiene and Quality Insurance System (HASAQ), Higher National Veterinary School, Issad Abbes, Oued Smar, Algiers, Algeria
| | - Nazli Ayhan
- IHU Méditerranée Infection, Marseille, France.,Aix Marseille Univ, IRD 190, INSERM U1207, Unité des Virus Emergents, Marseille, France
| | - Marie Varloud
- Ceva Santé Animale, 10, Av de la Ballastière, Libourne, France
| | - Oleg Mediannikov
- Aix Marseille Univ, IRD, AP-HM, MEPHI, Marseille, France.,IHU Méditerranée Infection, Marseille, France
| | - Domenico Otranto
- IHU Méditerranée Infection, Marseille, France.,Faculty of Veterinary Sciences, Bu-Ali Sina University, Hamedan, Iran
| | - Bernard Davoust
- Aix Marseille Univ, IRD, AP-HM, MEPHI, Marseille, France. .,IHU Méditerranée Infection, Marseille, France. .,Animal Epidemiology Experts Group of the Military Health Service, Tours, France.
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Qiu A, Albert M, Lyketsos C, Younes L, Miller MI. Diffeomorphic Mapping of Longitudinal Anatomical Shapes. Neuroimage 2009. [DOI: 10.1016/s1053-8119(09)71883-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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Vaillant M, Miller MI, Younes L, Trouvé A. Statistics on diffeomorphisms via tangent space representations. Neuroimage 2004; 23 Suppl 1:S161-9. [PMID: 15501085 DOI: 10.1016/j.neuroimage.2004.07.023] [Citation(s) in RCA: 102] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2004] [Accepted: 07/01/2004] [Indexed: 11/27/2022] Open
Abstract
In this paper, we present a linear setting for statistical analysis of shape and an optimization approach based on a recent derivation of a conservation of momentum law for the geodesics of diffeomorphic flow. Once a template is fixed, the space of initial momentum becomes an appropriate space for studying shape via geodesic flow since the flow at any point along the geodesic is completely determined by the momentum at the origin through geodesic shooting equations. The space of initial momentum provides a linear representation of the nonlinear diffeomorphic shape space in which linear statistical analysis can be applied. Specializing to the landmark matching problem of Computational Anatomy, we derive an algorithm for solving the variational problem with respect to the initial momentum and demonstrate principal component analysis (PCA) in this setting with three-dimensional face and hippocampus databases.
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Affiliation(s)
- M Vaillant
- Center for Imaging Science, The Johns Hopkins University, Baltimore, MD 21218, USA.
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