Dermacentor raskemensis (Ixodoidea: Ixodidae), Redescription and Notes on Ecology

Dhanda, V.; Kulkarni, S. M.; Pratt, Paul D.

doi:10.2307/3277993

Cited by 6 publications

(3 citation statements)

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“…Although demonstrating characteristics of both the Palearctic and Oriental regions, the knowledge regarding the genera Alectorobius and Dermacentor is limited within Pakistan. No tick species from the Alectorobius genus has been reported, while only Dermacentor raskemensis and Dermacentor marginatus have been identified morphologically or molecularly within the Dermacentor genus in this country (39)(40)(41)(42)(43). To address this knowledge gap, in this study, we reported the occurrence and genetic characterization of Dermacentor and Alectorobius species in Pakistan using morphological and molecular approaches.…”

Section: Introductionmentioning

confidence: 99%

First record of Alectorobius coniceps (Ixodoidea: Argasidae) and Dermacentor sp. (Ixodoidea: Ixodidae) in Pakistan

Ali,

Khan,

Ullah

et al. 2024

Front. Vet. Sci.

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Alectorobius species are soft ticks primarily infesting birds, such as swallows, while Dermacentor species are hard ticks mainly infesting mammals, such as small ruminants. This study for the first time reported on the morphological and molecular bases of two tick species, namely A. coniceps and a Dermacentor sp. in Pakistan. The former species was examined in swallows’ nests in Khyber Pakhtunkhwa province, while the latter species was examined in small ruminants in Balochistan province. In total, 25 ticks were collected, with 14 ticks morphologically identified as A. coniceps (males = 9 and females = 5) and 11 ticks identified as Dermacentor sp. (males = 7 and females = 4). Following morphological identification, molecular identification was gained by obtaining 16S rDNA and cox1 sequences for these ticks. The BLAST results for the 16S rDNA and cox1 sequences from A. coniceps shared a maximum identity of 97.46% and 96.49% with the same species from Malta. The BLAST analysis of the 16S rDNA and cox1 sequences from Dermacentor sp. showed maximum identities of 98.42% and 97.45% with Dermacentor pavlovskyi from China. The phylogenetic analysis based on 16S rDNA and cox1 of A. coniceps showed a close evolutionary relationship with the same species. The case of Dermacentor sp., based on 16S DNA and cox1, indicated a close evolutionary relationship with Dermacentor pavlovskyi from China.

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Section: Introductionmentioning

confidence: 99%

First record of Alectorobius coniceps (Ixodoidea: Argasidae) and Dermacentor sp. (Ixodoidea: Ixodidae) in Pakistan

Ali,

Khan,

Ullah

et al. 2024

Front. Vet. Sci.

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“…Recently, Dermacentor atrosignatus has been reinstated as Dermacentor tricuspis, and D. atrosignatus has been considered as a synonym of D. tricuspis [9,10]. A single species of the genus Dermacentor, i.e., Dermacentor raskemensis, has been confirmed and reported from Pakistan based on the collection of immature and adult stages [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

First Molecular-Based Confirmation of Dermacentor marginatus and Associated Rickettsia raoultii and Anaplasma marginale in the Hindu Kush Mountain Range

Ahmad,

Ullah,

Alouffi

et al. 2023

Animals

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Ticks of the genus Dermacentor Koch, 1844 (Acari: Ixodidae) are poorly known systematically due to their habitation in harsh topographic environments and high mountains. Dermacentor ticks are diversely distributed in the Palearctic, Nearctic, and Oriental regions. There is no available information on the occurrence of Dermacentor marginatus in Pakistan; thus, the current investigation aimed the first morphological and molecular confirmation of this species and associated Anaplasma marginale and Rickettsia raoultii. Ticks were collected from goats (Capra hircus) and morphologically identified. Genomic DNA was extracted from 18/26 (69.23%) tick specimens, including 11 males and 7 females (1 unfed and 6 fed females). Extracted DNA was subjected to PCR for the amplification of genetic markers like 16S rDNA and cox1 for ticks, 16S rDNA for Anaplasma spp., and gltA and ompB for Rickettsia spp. A total of 26 D. marginatus ticks composed of 19 males (73.07%) and 7 females (26.9%) [1 (3.84%) unfed and 6 (23.07%) fed females] were collected from goats. According to amplicons via BLAST analysis, the 16S rDNA sequence showed 97.28–98.85% identity and the cox1 sequence showed 95.82–98.03% identity with D. marginatus. Additionally, the 16S rDNA sequence for Anaplasma sp. was detected in D. marginatus that showed 100% identity with Anaplasma marginale. Rickettsial gltA and ompB sequences for Rickettsia sp. showed 100% identity with Rickettsia raoultii. In phylogenetic analysis, ticks’ 16S rDNA and cox1 sequences clustered with the same species. In phylogenetic analysis, A. marginale based on 16 rDNA clustered with A. marginale, while gltA and ompB sequences clustered with R. raoultii. This is the first study on the genetic characterization of D. marginatus and associated A. marginale and R. raoultii in Pakistan. The northern areas of Pakistan, which need to be explored in terms of ticks and associated pathogens due to their zoonotic threats, have been neglected due to the inaccessible climatic conditions.

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“…Adults of this species are mostly found on wild and domestic sheep and goats in the mountains of Central Asia, Asia Minor, and the Near East (Dhanda et al 1971; Filippova 1983, 1997). Adults have been collected from humans on multiple occasions, thus pointing out the potential medical importance of this tick species.…”

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confidence: 99%

First Description of the Nymph and Larva ofDermacentor raskemensis(Acari: Ixodidae), Parasites of Pikas and Other Small Mammals in Central Asia

Apanaskevich

2013

J Med Entomol

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Dermacentor raskemensis Pomerantzev, 1946 is one of the rare Asian species in this genus. The immature stages of this species have never been described. Reexamination of D. raskemensis holdings stored in the United States National Tick Collection revealed a collection lot containing reared nymphs and larvae of this species. This collection made it possible for us to find numerous nymphs and larvae of D. raskemensis among previously unidentified material collected in the field. Both immature stages of D. raskemensis are described here for the first time. Nymphs of D. raskemensis can be distinguished from those of other Dermacentor species in the region by small spiracular plate, relatively short and obtuse lateral projections of basis capituli dorsally, relatively short spurs on coxa I and the internal spur is characteristically very broadly rounded at its apex, and very small spur on coxa IV, whereas larvae of D. raskemensis can be distinguished from other Dermacentor by relatively short and obtuse lateral projections of basis capituli, ≈6 denticles in the median files on hypostome, and relatively short, broad, and rounded spur on coxa I. The nymphs and larvae of D. raskemensis studied originate from Afghanistan, India, Iran, and Pakistan, where they were collected from pikas and other small mammals.

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Dermacentor raskemensis (Ixodoidea: Ixodidae), Redescription and Notes on Ecology

Cited by 6 publications

References 0 publications

First record of Alectorobius coniceps (Ixodoidea: Argasidae) and Dermacentor sp. (Ixodoidea: Ixodidae) in Pakistan

First record of Alectorobius coniceps (Ixodoidea: Argasidae) and Dermacentor sp. (Ixodoidea: Ixodidae) in Pakistan

First Molecular-Based Confirmation of Dermacentor marginatus and Associated Rickettsia raoultii and Anaplasma marginale in the Hindu Kush Mountain Range

First Description of the Nymph and Larva ofDermacentor raskemensis(Acari: Ixodidae), Parasites of Pikas and Other Small Mammals in Central Asia

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