Life cycle of tortoise tick Hyalomma aegyptium under laboratory conditions

Široký, Pavel; Erhart, Jan; Petrželková, Klára J.; Kamler, Martin

doi:10.1007/s10493-011-9442-8

Cited by 29 publications

(16 citation statements)

References 24 publications

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“…The present work revealed that H. rufipes had a complete life cycle of 179 days on average under laboratory conditions, which was longer than those of H. asiaticum kozlovi, H. impeltatum, H. detritum, H. aegyptium and H. dromedarii (Alahmed and Kheir 2003;Chen et al 2009;Logan et al 1989;Ouhelli 1994;Š iroký et al 2011). The egg incubation period was the longest in the life cycle of H. rufipes.…”

Section: Discussionmentioning

confidence: 44%

The life cycle of Hyalomma rufipes (Acari: Ixodidae) under laboratory conditions

Chen

Liu

et al. 2011

Exp Appl Acarol

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Biological characteristics of Hyalomma rufipes parasitising on rabbits and sheep were compared under laboratory conditions in Gansu, China. Mature ticks could parasitize both rabbits and sheep, while immature ticks only fed on rabbits successfully. Adults sucked blood on sheep significantly longer than on rabbits (16 and 13 days, respectively). Other adult parasite characteristics fed on the two hosts were similar, including the weight of engorged adult, female daily oviposition, and the weight and amount of the egg mass laid. Those indicated that this tick species showed little host specificity between sheep and rabbits during its adult stage. In total, the life cycle of H. rufipes was completed in an average period of 179 days. The average developmental periods were 59 days for egg incubation, 3 and 21 days for immature tick prefeeding and feeding, 2, 12 and 40 days for adult prefeeding, female preoviposition and oviposition. The longer female fed for engorgement, the shorter preoviposition period of engorged female needed, although when the feeding period was less than 15 days, this relationship was not obvious. The results confirmed the correlation between the weight of the engorged female and the number of eggs laid (r = 0.909). The reproductive efficiency index (REI) and reproductive fitness index (RFI) in females was 10.63 and 7.22, respectively. Engorged nymphs moulting to females were significantly heavier (27.6 ± 0.89 mg) than those moulting to males (22.3 ± 0.52 mg). Males outnumbered females by 1.4:1.

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Section: Discussionmentioning

confidence: 44%

The life cycle of Hyalomma rufipes (Acari: Ixodidae) under laboratory conditions

Chen

Liu

et al. 2011

Exp Appl Acarol

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“…These parasites may cause serious problems by distributing pathogens among animal owners and animals (2,24). Among Hyalomma type ticks, Hyalomma aegyptium is known as the tortoise tick due to its specificity to tortoises on which mature forms of ticks live (15,27,29). This specificity is sometimes so high that it has caused that the presence of H. aegyptium is considered as an indirect indicator of the presence of Testudo graeca (28,30).…”

Section: Praca Oryginalnamentioning

confidence: 99%

Ticks collected from reptile species on Small Nemrut

Yılmaz¹,

Kiliç²,

Adizel³

et al. 2018

Medycyna Weterynaryjna

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This study aims to identify the ticks living on reptiles of Small Nemrut Mountain as ectoparasites. Field work was carried out between May and November 2016. The mountain which attracts a lot of visitors is an extinct volcano. There are settlements close to the mountain. Furthermore, the area is the upland for the local fauna. 12 reptile species live on the mountain. In the scans on reptiles living in the area, the Hyalomma aegyptium type tick is identified on Testudo graeca (Common Tortoise) and Darevskia valentini (Valentin’s Lizard) species. The infestation rate was found to be 66.66% on tortoises and 28.57% on lizards. In the resources, it was reported that Borellia turcica, Theileria spp, Borellia burgdorferi, Anaplasma phagocytophilum, which are microorganisms with high pathogenicity in humans and animals, are isolated from H. aegyptium collected from tortoises. In addition, it was reported in various studies that Hyalomma aegyptium is a reservoir host for Hemoliva mauritanica which is a blood parasite that has been identified to intensively cause diseases in tortoises..

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“…Hyalomma aegyptium (Linnaeus, 1758) is a three-host tick and has an extremely long feeding period compared to most of the other tick species [7]. All stages, but especially adults, are highly host-specific and feed primarily on tortoises.…”

Section: Introductionmentioning

confidence: 99%

Crimean-Congo hemorrhagic fever virus in tortoises and Hyalomma aegyptium ticks in East Thrace, Turkey: potential of a cryptic transmission cycle

et al. 2020

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Background: Recent reports have demonstrated the presence of Crimean-Congo hemorrhagic fever virus (CCHFV) genomic material in Hyalomma aegyptium ticks feeding primarily on tortoises belonging to the genus Testudo. This raises the question if these ticks and their hosts play a role in the natural transmission dynamics of CCHFV. However, the studies are limited, and assessing the relevance of H. aegyptium in perpetuating the virus in nature, and a potential spillover to humans remains unknown. This study aimed to detect CCHFV in H. aegyptium ticks and their tortoise hosts in the East Thrace region of Turkey, where H. aegyptium is the most common human-biting tick and where a high density of tortoises of the genus Testudo can be found. Methods: During the study period, 21 blood samples from different tortoises (2 T. hermanni and 19 T. graeca), 106 tick pools (containing 448 males, 152 females, 93 nymphs and 60 larvae) collected from 65 tortoises (5 T. hermanni and 60 T. graeca), 38 adult unfed questing ticks (25 males and 13 females, screened individually) and 14 pools (containing 8 nymphs and 266 larvae) of immature unfed questing ticks collected from the ground were screened for CCHFV genome by nested PCR and partial genomes sequenced. Results: As a result of the screening of these 179 samples, 17 (9.5%) were detected as positive as follows: 2 of 21 blood samples (9.52%), 13 (containing 18 nymphs in 3 pools, and 52 males and 8 females in 10 pools) of 106 tick pools from tortoises (12.26%), and 2 of 38 adult questing ticks (5.26%). No positive result was determined in 14 pools of immature questing ticks. Conclusions: Previous studies have shown that reptiles can participate in the transmission of arthropod-borne viruses, but they may contribute to different aspects of the disease ecology and evolution of tick-borne viral pathogens. Our results indicate the presence of CCHFV in questing and feeding H. aegyptium ticks as well as tortoise hosts. This may indicate that CCHFV circulates in a cryptic transmission cycle in addition to the primary transmission cycle that could play a role in the natural dynamic of the virus and the transmission to humans.

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Life cycle of tortoise tick Hyalomma aegyptium under laboratory conditions

Cited by 29 publications

References 24 publications

The life cycle of Hyalomma rufipes (Acari: Ixodidae) under laboratory conditions

The life cycle of Hyalomma rufipes (Acari: Ixodidae) under laboratory conditions

Ticks collected from reptile species on Small Nemrut

Crimean-Congo hemorrhagic fever virus in tortoises and Hyalomma aegyptium ticks in East Thrace, Turkey: potential of a cryptic transmission cycle

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