Chigger mites (Acariformes: Trombiculidae) of Iran

Stekolnikov, Alexandr A.; Saboori, Alireza; Shamsi, Mohsen; Hakimitabar, Masoud

doi:10.11646/zootaxa.4549.1.1

Cited by 792 publications

(9 citation statements)

References 8 publications

(9 reference statements)

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“…According to the available taxonomic literature (books and papers) and taxonomic keys, the identification for each chigger specimen was done under a high power lens (10 × 40) and oil immersion lens (10 × 100) of the microscope, based on the careful observation and measurement of the related taxonomic structures of chiggers (see Table 2 and Fig. 2 in “Results”) [ 25 , 49 , 50 , 53 ]. Following identification of animal hosts and chiggers, all Chinese mole shrews ( A. squamipes ), together with chiggers on the body surface of shrews, were chosen as the target of the present study.…”

Section: Methodsmentioning

confidence: 99%

“…The taxonomic status of chigger mites is controversial. In some of the literature, all the chigger mites have been grouped into one family, the family Trombiculidae, in the suborder Prostigmata under the order Trombidiformes of the superorder Actinotrichida (or Acariformes) [ 25 , 34 , 50 ]. In other articles, however, the chigger mites have been placed in two families (Trombiculidae and Leeuwenhoekiidae) or three families (Trombiculidae, Leeuwenhoekiidae and Walchiidae) under the order Trombidiformes of the superorder Acariformes [ 4 , 37 , 53 , 58 ].…”

Section: Introductionmentioning

confidence: 99%

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Infestation of chigger mites on Chinese mole shrew,Anourosorex squamipes, in Southwest China and ecological analysis

Guo

Zhao

et al. 2022

Parasite

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The Chinese mole shrew, Anourosorex squamipes Milne-Edwards, 1872, is a common species of insectivorous mammal in Southwest China. Based on field investigations between 2001 and 2019, the present study reports the infestation of chiggers (larvae of chigger mites) on the shrew in Southwest China and certain ecology parameters for the first time. A total of 3169 chiggers were collected from 1694 A. squamipes and they were identified into 72 species and 10 genera in the family Trombiculidae. The overall infestation prevalence (Pm), mean abundance (MA) and mean intensity (MI) of A. squamipes with chiggers reached 11.1%, 1.87 and 16.86, respectively. The species diversity, species composition and infestation of chiggers on A. squamipes fluctuated in different environments (latitudes, altitudes, habitats and landscapes) and on different sexes and ages of the shrew hosts with high heterogeneity and low species similarity. In the established linear regression equation (M* = 0.173 + 1.054 M) for dominant mite Leptotrombidium densipunctatum, both the α and β values (α = 0.173, β = 1.054) exceeded the boundary values (F = 4.67, p < 0.05), and therefore the spatial distribution pattern of this mite was determined as an aggregated distribution among different individuals of shrew hosts. The species abundance distribution of the chigger community on A. squamipes conformed to the lognormal distribution, and its curve showed a gradually descending tendency from the rare mite species to the dominant mite species. The curve tendency of species-sample relationship implies that more species of chiggers would be found if the host samples infinitely keep increasing.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Infestation of chigger mites on Chinese mole shrew,Anourosorex squamipes, in Southwest China and ecological analysis

Guo

Zhao

et al. 2022

Parasite

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“…However, R. tanezumi trapped in this study were all infested with chiggers (prevalence = 100%); some individuals were even parasitized with close to 2,000 chiggers. Because host is required in only a single life stage (larva) of trombiculid mite, and the L. deliense chigger can utilize a very wide range of host species (Stekolnikov, 2021), introduced hosts can be infested with no fewer chiggers, particularly when rodents were introduced from habitats unfavorable for chiggers (paved areas on mainland) to their favorable habitats (forest on island).…”

Section: Discussionmentioning

confidence: 99%

“…Rodents are the primary hosts of chiggers (Harrison and Audy, 1951;Traub and Wisseman, 1974;Kawamura et al, 1995), including L. deliense (Stekolnikov, 2021). If chiggers are introduced, whether accompanied R. tanezumi or other exotic host species, their abundance will increase following raised number and habitat expansion of R. tanezumi.…”

Section: Discussionmentioning

confidence: 99%

Commensal rodent habitat expansion enhances arthropod disease vectors on a tropical volcanic island

Wu¹,

Shih

Wang³

et al. 2021

Preprint

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Release from predators and competitors on volcanic islands can lead to increased body size and population density, as well as expanded habitat usage of introduced animals relative to their mainland counterparts. Such alterations might help the spread of diseases on islands when these exotic animals also carry pathogenic agents, but is rarely investigated. The commensal Asian house rat (Rattus tanezumi) is confined to human residential surroundings in Taiwan mainland but can be observed in the primary forests of the nearby Orchid Island, a tropical volcanic island. Orchid Island is also a hotspot of scrub typhus, a lethal febrile disease transmitted by larval trombiculid mites (chiggers) infective of the rickettsia Orientia tsutsugamushi (OT). We predicted an increase in chigger abundance when rodents, the primary host of chiggers, invade forests from human settlements as soils are largely devoid of in the latter habitat but is necessary for the survival of nymphal and adult mites. A trimonthly rodent survey in ten sites of three habitats (human resident, grassland, and forest) found only R. tanezumi and showed more R. tanezumi and chiggers in forest than in human residential sites. There was a positive association between rodent and chigger abundance, as well between rodent body weight and load of chiggers. Lastly, >95% of chiggers were Leptotrombidium deliense and their OT infection rates were similar among the habitats. Our study demonstrated potentially elevated risks of scrub typhus when the commensal rat is allowed to invade natural habitats on islands. In addition, while the success of invasive species can be ascribed to their parasites being left behind, island invaders might instead attain more parasites when the parasite requires only a single host (e.g. trombiculid mite), is a host generalist (L. deliense), and is transferred from unsuitable to suitable habitats (human settlement on mainland to forest on island).

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“…Gnathosoma (Figs. 6,7,11). Cheliceral blade with tricuspid cap; proximal half of cheliceral base with small puncta; gnathobase bears one pair of branched setae; galeal setae nude; palpal claw with 3 prongs (Fig.…”

Section: Description (Figs 1-14)mentioning

confidence: 99%

A new species of Schoutedenichia Jadin & Vercammen-Grandjean, 1954 from Madagascar and a re-description of S. dutoiti (Radford, 1948) from South Africa (Acariformes: Trombiculidae)

et al. 2019

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Response to Reviewers: "Please download from the website two copies for your edited MS. One (A version) shows the changes and the other (B version) has them accepted. Could you please check the changes carefully and provide information or reword text where highlighted. Please leave the tracking on and highlight any changes you wish to make on the B version and submit it to the Editorial Manager."-Done. "Also make sure you submit to the Editorial Manager the final versions of high quality figures. Skip this in case you have done so with the first submission of the MS and no revisions were made."-High resolution figures are uploaded. Low resolution figures remained at the end of the Main Document.

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Chigger mites (Acariformes: Trombiculidae) of Iran

Cited by 792 publications

References 8 publications

Infestation of chigger mites on Chinese mole shrew,Anourosorex squamipes, in Southwest China and ecological analysis

Infestation of chigger mites on Chinese mole shrew,Anourosorex squamipes, in Southwest China and ecological analysis

Commensal rodent habitat expansion enhances arthropod disease vectors on a tropical volcanic island

A new species of Schoutedenichia Jadin & Vercammen-Grandjean, 1954 from Madagascar and a re-description of S. dutoiti (Radford, 1948) from South Africa (Acariformes: Trombiculidae)

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