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Elati K, Benyedem H, Fukatsu K, Hoffmann-Köhler P, Mhadhbi M, Bakırcı S, Bilgiç HB, Karagenç T, Darghouth MA, Nijhof AM. In vitro feeding of all life stages of two-host Hyalomma excavatum and Hyalomma scupense and three-host Hyalomma dromedarii ticks. Sci Rep 2024; 14:444. [PMID: 38172407 PMCID: PMC10764919 DOI: 10.1038/s41598-023-51052-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Accepted: 12/29/2023] [Indexed: 01/05/2024] Open
Abstract
Ticks are blood-sucking ectoparasites and can transmit various pathogens of medical and veterinary relevance. The life cycle of ticks can be completed under laboratory conditions on experimental animals, but the artificial feeding of ticks has attracted increased interest as an alternative method. This study represents the first report on the successful in vitro feeding of all life stages of two-host tick species, Hyalomma scupense and Hyalomma excavatum, and the three-host tick Hyalomma dromedarii. The attachment and engorgement rates of adults were 84% (21/25) and 76% (19/25) for H. scupense females. For adult H. excavatum and H. dromedarii, 70% (21/30) and 34.4% (11/32) of the females attached and all attached females successfully fed to repletion. The oviposition rates of the artificially fed females were 36.4%, 57.1% and 63.1% for H. dromedarii, H. excavatum and H. scupense, respectively, with a reproductive efficiency index varying between 44.3 and 60.7%. For the larvae, the attachment and engorgement rates were 44.2% (313/708) and 42.8% (303/708) for H. dromedarii, 70.5% (129/183) and 56.8% (104/183) for H. excavatum and 92.6% (113/122) and 55.7% (68/122) for H. scupense. The attachment and engorgement rates for the nymphs were 90.2% (129/143) and 47.6% (68/143) for H. dromedarii, 66.7% (34/51) and 41.2% (21/51) for H. excavatum, and 44.1% (30/68) and 36.8% (25/68) for H. scupense. Molting rates of the immature stages varied between 71.3% (216/303) and 100% (68/68) for the larvae and between 61.9% (13/21) and 96% (24/25) for the nymphs. The successful in vitro feeding of all stages of the three Hyalomma species makes this method a valuable tool for tick research, with potential applications in studies on the pathogens transmitted by these tick species such as Theileria annulata.
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Affiliation(s)
- Khawla Elati
- Institute of Parasitology and Tropical Veterinary Medicine, Freie Universität Berlin, Robert-Von-Ostertag-Str. 7, 14163, Berlin, Germany.
- Veterinary Centre for Resistance Research, Freie Universität Berlin, Robert-Von-Ostertag-Str. 8, 14163, Berlin, Germany.
- Laboratoire de Parasitologie, École Nationale de MédecineVétérinaire de SidiThabet, Institution de la Recherche et de l'Enseignement Supérieur Agricoles, Univ. Manouba, 2020 Sidi Thabet, Tunisia, Univ. Manouba, Sidi Thabet, Tunisia.
| | - Hayet Benyedem
- Laboratoire de Parasitologie, École Nationale de MédecineVétérinaire de SidiThabet, Institution de la Recherche et de l'Enseignement Supérieur Agricoles, Univ. Manouba, 2020 Sidi Thabet, Tunisia, Univ. Manouba, Sidi Thabet, Tunisia
| | - Kohsuke Fukatsu
- Institute of Parasitology and Tropical Veterinary Medicine, Freie Universität Berlin, Robert-Von-Ostertag-Str. 7, 14163, Berlin, Germany
- Research Center, Nihon Nohyaku Co., Ltd., Osaka, Japan
| | - Peggy Hoffmann-Köhler
- Institute of Parasitology and Tropical Veterinary Medicine, Freie Universität Berlin, Robert-Von-Ostertag-Str. 7, 14163, Berlin, Germany
| | - Moez Mhadhbi
- Laboratoire de Parasitologie, École Nationale de MédecineVétérinaire de SidiThabet, Institution de la Recherche et de l'Enseignement Supérieur Agricoles, Univ. Manouba, 2020 Sidi Thabet, Tunisia, Univ. Manouba, Sidi Thabet, Tunisia
| | - Serkan Bakırcı
- Faculty of Veterinary Medicine, Department of Parasitology, Aydın Adnan Menderes University, Isıklı‑Efeler, Aydın, Turkey
| | - Hüseyin Bilgin Bilgiç
- Faculty of Veterinary Medicine, Department of Parasitology, Aydın Adnan Menderes University, Isıklı‑Efeler, Aydın, Turkey
| | - Tülin Karagenç
- Faculty of Veterinary Medicine, Department of Parasitology, Aydın Adnan Menderes University, Isıklı‑Efeler, Aydın, Turkey
| | - Mohamed Aziz Darghouth
- Laboratoire de Parasitologie, École Nationale de MédecineVétérinaire de SidiThabet, Institution de la Recherche et de l'Enseignement Supérieur Agricoles, Univ. Manouba, 2020 Sidi Thabet, Tunisia, Univ. Manouba, Sidi Thabet, Tunisia
| | - Ard M Nijhof
- Institute of Parasitology and Tropical Veterinary Medicine, Freie Universität Berlin, Robert-Von-Ostertag-Str. 7, 14163, Berlin, Germany.
- Veterinary Centre for Resistance Research, Freie Universität Berlin, Robert-Von-Ostertag-Str. 8, 14163, Berlin, Germany.
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Clausen PH, Stephan A, Bartsch S, Jandowsky A, Hoffmann-Köhler P, Schein E, Mehlitz D, Bauer B. Seasonal dynamics of biting midges (Diptera: Ceratopogonidae, Culicoides spp.) on dairy farms of Central Germany during the 2007/2008 epidemic of bluetongue. Parasitol Res 2009; 105:381-6. [PMID: 19333620 DOI: 10.1007/s00436-009-1417-x] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2009] [Accepted: 03/11/2009] [Indexed: 11/28/2022]
Abstract
The unforeseen outbreak of bluetongue in north-western Europe in August 2006 raised the question, which Culicoides spp. were involved in the transmission of bluetongue virus (BTV). Based on the decision 2007/20/EU of December 2006, a large-scale entomological surveillance programme was initiated in the five affected EU member states including Germany. This paper reports on the entomological findings obtained from March/April 2007 to May 2008 at 15 sampling sites in the federal states of Lower Saxony (eastern region), Mecklenburg-Western Pomerania, Brandenburg and Saxony-Anhalt: The number of captured biting midges in one trap varied from none or few Culicoides during winter (December 2007 to April 2008) to up to more than 12,500 individuals during summer and autumn. Catches of the C. obsoletus group were consistently higher than those of the C. pulicaris group. C. imicola, the principal afro-asiatic vector of BTV, was not detected. High numbers of midges were caught inside the cattle sheds. Eleven pools of biting midges were RT-PCR-positive to BTV-8 including pools of non-engorged midges of the C. obsoletus and of the C. pulicaris groups. The first BTV-genome positive pool of midges was detected in August 2007; the remaining genome-positive pools were detected during October and November 2007.
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Affiliation(s)
- Peter-Henning Clausen
- Institute for Parasitology and Tropical Veterinary Medicine, Freie Universitaet Berlin, Koenigsweg 67, 14163, Berlin, Germany.
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