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Zahler, Monika; Hendrikx, W.M.L.; Essig, Anke; Rinder, Heinz; Gothe, R.

doi:10.1023/a:1011857802317

Cited by 18 publications

(6 citation statements)

References 2 publications

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“…In addition, the authors of a recently published paper on the behavior of cows with chorioptic mange on a dairy farm in British Columbia, Canada [5], provided skin scrapings for the speciation of the mites. The taxonomy of the genus Chorioptes has been repeatedly a matter of debate in the recent past [8][9][10]. The most recent revision concluded that there are six valid species including C. bovis (Hering, 1845) and C. texanus Hirst, 1924 which are the causative agents of chorioptic mange in bovines and other ungulates [1].…”

Section: Source Of Materialsmentioning

confidence: 99%

“…However, a generally higher level of restlessness, especially during the milking process, or an increase in activities to relieve pruritus associated with mange, constitute long-term stressors which reduce the well-being of the animals and can contribute to productivity losses [2][3][4][5][6][7]. The taxonomy of the genus Chorioptes has been repeatedly a matter of debate in the recent past [8][9][10]. The most recent revision concluded that there are six valid species including C. bovis (Hering, 1845) and C. texanus Hirst, 1924 which are the causative agents of chorioptic mange in bovines and other ungulates [1].…”

Section: Introductionmentioning

confidence: 99%

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Is Chorioptes texanus to Displace Chorioptes bovis? Notes on the Mites Causing Bovine Chorioptic Mange in Central Europe

Rehbein,

Visser

2024

Diversity

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Chorioptic mange is the most common type of bovine mange in central Europe, affecting mainly housed dairy cattle. Until 1976, when Chorioptes texanus were described for the first time from mangy cattle in Brazil, bovine chorioptic mange was thought to be caused only by C. bovis mites. In Europe, C. texanus parasitism in cattle was for the first time reported in Germany in 1998. Following the repeated diagnosis of C. texanus mites in skin scrapings from local cattle in recent years, scrapings from cattle that were clinically suspicious for chorioptic mange were requested and provided during the years from 2019 to 2022 from Austria, France, Germany, and Switzerland (from 6, 17, 28, and 7 farms, respectively) and from dairy cows of 1 farm in Canada. Mites were isolated from the scrapings, cleared, and microscopically identified based on their morphology. Examination of scrapings revealed the presence of C. texanus in the cattle from 2 farms in Austria, 13 farms in France, 7 farms in Germany, 1 farm in Switzerland, and in the specimens from Canada. Chorioptes bovis mites were recovered only in scrapings from 5 farms in Germany and Psoroptes ovis mites in scrapings of cattle from 2 farms in France. The scrapings did not reveal co-infestations of C. bovis and C. texanus or of Chorioptes species and P. ovis. The records of C. texanus from Austria, France, Switzerland, and Canada constitute the first descriptions of this mite species in these countries. Although this investigation was based on an opportunistic collection of the material and was of small extent, the results suggest a widespread occurrence of C. texanus in central Europe and may emphasize the need for studies to closely investigate the nature of the causative agents of chorioptic mange in cattle and other hosts.

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Section: Source Of Materialsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Is Chorioptes texanus to Displace Chorioptes bovis? Notes on the Mites Causing Bovine Chorioptic Mange in Central Europe

Rehbein,

Visser

2024

Diversity

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“…crewei and Ch. mydaus were considered dubious (Zahler et al, 2001;Wang et al, 2012;Suh et al, 2008) and Ch. sweatmani was suspected based on data of molecular and morphometry studies, but not properly described (Hestvik et al, 2007;Lusat et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

“…texanus from both domestic and wild animals, including goats in Texas, reindeer in Canada, cattle in Brazil, Israel, Germany, and the United States, and moose in Poland. Also, this species of Chorioptes was isolated from cattle and goats in Southeast Asian countries, Japan and Malaysia, as well as from Holstein cattle in Korea (Dorny et al, 1994;Nagata et al, 1995;Zahler et al, 2001;Suh et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Morphological features of the causative agent of chorioptic mange isolated from cattle

Melnychuk,

Kovalenko,

Yevstafieva

et al. 2024

Regul. Mech. Biosyst.

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Providing veterinary care against parasitic diseases is one of the factors that affect the possibility of effective and profitable introduction of the livestock sector. Chorioptic mange is one of the globally spread invasive diseases of cattle caused by persistent ectoparasites. The diagnosis of chorioptosis is based on the microscopic detection of mites in scrapings from the skin of the affected animal with mandatory identification of the parasites. The aim of the research was to investigate the morphological features and metric parameters of Chorioptes mites isolated from cattle. Mites isolated from cattle were morphometrically identified as Chorioptes texanus. Morphological features of male Ch. texanus mites include peculiarities in the structure of the opisthosomal lobes and of the setae located on the opisthosomal lobes, opisthosoma and tarsus of leg III. 14 morphometric parameters characterizing the general structure of the body (length, width and their ratio, length and width of the gnathosoma, length of the idiosoma, proterosoma, podosoma, propodosoma, metapodosoma, hysterosoma, opisthosoma, length and width of the propodosomal shield) were identified and suggested for use in identification of male and female Ch. texanus. In male mites of this species, 5 additional parameters were also determined, which describe the length and width of the opisthomal lobes, their ratio, the diameter of the adanal suckers and the distance between them. The morphological features, location and length of 6 setae, which are species-specific in Chorioptes mites, namely 4 setae of the opisthosomal lobe, 1 opisthosomal seta, 1 ventral seta of tarsus III, were described. The parameters of Ch. texanus eggs in the bodies of female mites and on the body of the host animal were determined. The scientific data obtained in this study expand the already existing data on the differential identification of Ch. texanus mites and proves their parasitism in cattle on the territory of Ukraine.

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“…Itching also makes the animal restless and can result in reduced production of beef and milk [10–12]. Based on morphological, epidemiological and genetic differentiation, Chorioptes bovis and Chorioptes texanus are generally accepted as two distinct valid species [1, 13, 14]. The egg, larva, protonymph, deutonymph and adult constitute a single life-cycle which spans approximately three weeks [7, 15].…”

Section: Introductionmentioning

confidence: 99%

Transcriptome-based analysis of putative allergens of Chorioptes texanus

Xie

et al. 2019

Parasites Vectors

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BackgroundMites of the genus Chorioptes are non-burrowing and cause mange in a wide range of domestic and wild animals including cattle, horses, sheep, goats, panda, moose, camelids, mydaus and alpacas. Molecular biology and host-parasite interactions of Chorioptes texanus are poorly understood, and only a few C. texanus genes and transcript sequences are available in public databases including the allergen genes.MethodsChorioptes texanus RNA was isolated from mites, and the transcriptome of C. texanus was analyzed using bioinformatics tools. Chorioptes texanus unigenes were compared with the allergen protein sequences from the mite allergen database website to predict the potential allergens. Chorioptes texanus putative allergen unigenes were compared with hydrolase genes by building a C. texanus hydrolase gene library with the best match of the homologous sequences. Three allergen genes were cloned and expressed, their recombinant proteins were purified and their allergenic activities were preliminarily investigated.ResultsTranscriptome sequencing (RNA-Seq) of C. texanus was analyzed and results demonstrated that 33,138 unigenes were assembled with an average length of 751 bp. A total of 15,130 unigenes were annotated and 5598 unigenes were enriched in 262 KEGG signaling pathways. We obtained 209 putative allergen genes and 34 putative allergen-hydrolase genes. Three recombinant allergen proteins were observed to induce different degrees of allergic reactions on rabbit skin.ConclusionsThe present transcriptome data provide a useful basis for understanding the host-parasite interaction and molecular biology of the C. texanus mite. The allergenic activities of recombinant Euroglyphus maynei 1-like (Eur m 1-like) protein, Dermatophagoides ptreronyssinus 1-like (Der p 1-like) protein and Dermatophagoides ptreronyssinus 7-like (Der p 7-like) protein were preliminarily investigated by intradermal skin test. Meanwhile, differences in eosinophil counts were observed in different injected sites of the skin. The identification of putative allergen genes and hydrolase genes offers opportunities for the development of new diagnostic, prevention and treatment methods.

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Cited by 18 publications

References 2 publications

Is Chorioptes texanus to Displace Chorioptes bovis? Notes on the Mites Causing Bovine Chorioptic Mange in Central Europe

Is Chorioptes texanus to Displace Chorioptes bovis? Notes on the Mites Causing Bovine Chorioptic Mange in Central Europe

Morphological features of the causative agent of chorioptic mange isolated from cattle

Transcriptome-based analysis of putative allergens of Chorioptes texanus

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