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The Korean Journal of Parasitology Aug 2022Laelapinae mites are involved in transmission of microbial diseases between wildlife and humans, with an impact on public health. In this study, 5 mite members in the...
Laelapinae mites are involved in transmission of microbial diseases between wildlife and humans, with an impact on public health. In this study, 5 mite members in the subfamily Laelapinae (laelapin mites; LM) were morphologically identified by light microscopy, and the phylogenetic relationship of LM was analyzed in combination with the sequence information of part of the LM cytochrome oxidase subunit I (cox1) gene. The morphological identification revealed that 5 mites belonged to the genera Laelaps and Haemolaelaps, respectively. Sequence analysis showed that the ratio of non-synonymous mutation rate to synonymous mutation rate of LM was less than 1, indicating that the LM cox1 gene had undergone purifying selection. Phylogenetic analysis showed that the Laelapinae is a monophyletic group. The genera Haemolaelaps and Hyperlaelaps did not separated into distinct clades but clustered together with species of the genus Laelaps. Our morphological and molecular analyses to describe the phylogenetic relationships among different genera and species of Laelapinae provide a reference for the improvement and revision of the LM taxonomy system.
Topics: Animals; China; Cyclooxygenase 1; Mites; Phylogeny
PubMed: 36041489
DOI: 10.3347/kjp.2022.60.4.273 -
Lin Chuang Er Bi Yan Hou Tou Jing Wai... Jan 2021To investigate the characteristics of allergic rhinitis(AR) in the Nanning area and its correlation with meteorological factors. The characteristics of 16 969 cases...
To investigate the characteristics of allergic rhinitis(AR) in the Nanning area and its correlation with meteorological factors. The characteristics of 16 969 cases of AR in Nanning from May 2011 to June 2018 were analyzed. Meteorological parameters were collected from the official website of the Nanning Meteorological Bureau, including weather conditions, temperature, and wind direction. The relationship between the onset characteristics of AR patients and meteorological factors were also analyzed. Among the 16 969 patients with AR, the top three inhalation allergens were dust mite(56.0%), house dust mite(50.5%), and cockroach(37.4%). The skin index(SI) of dust mite, house dust mite, cockroach is correlated with sex. The SI of dust mite, house dust mite, mugwort, cockroach are correlated with age, and inhaled allergens are correlated with disease course(<0.05). However, those relationships were not significant(<0.2). The proportion of AR patients visiting the clinic in summer was the highest(3.9%) in all of the four seasons. Gender was found to be related to the grade-4 positive results of dust mite(=0.826, 95%: 0.724-0.942), the grade-4 house dust mite(=0.777, 95%: 0.677-0.891) and the grade-3 positive results of cockroach(=1.236, 95%: 1.060-1.443), respectively. The the daytime weather conditions were related to the grade-4 positive results of dust mite(=0.830, 95%: 0.728-0.947) and the grade 1 positive results of house dust mite(=0.803, 95%: 0.694-0.929), respectively. The highest temperature was related to the grade-4 positive result of dust mite(=1.032, 95%: 1.020-1.043), grade-1(=1.028, 95%: 1.001-1.056) and grade-4 (=1.047, 95%: 1.021-1.075) positive result of house dust mite, grade 1(=1.023, 95%: 1.001-1.047) and grade-4(=1.050, 95%: 1.008-1.094) positive result of cockroach, respectively. The minimum temperature was related to the positive results of house dust mites at all grades and the grade-1 positive results of cockroach(=0.947, 95%: 0.924-0.971), but not to dust mites. The daytime wind direction was related to the grade-3 positive results of cockroach(=1.437, 95%: 1.157-1.785). The number of AR patients in Nanning is highest in summer. The female is more likely to suffer from dust mite and house dust mite, while the male is more likely to suffer from cockroach. Meteorological factors are correlated with the incidence of AR.The highertemperature, the rain and the southerly wind could cause the occurrence or aggravation of AR.
Topics: Allergens; Animals; Cockroaches; Dust; Female; Humans; Male; Mites; Pyroglyphidae; Rhinitis, Allergic; Weather
PubMed: 33540962
DOI: 10.13201/j.issn.2096-7993.2021.01.001 -
Advances in Clinical and Experimental... 2014Demodex was first identified over 150 years ago, but only recently has it attracted wider interest as a contributor to chronic diseases such as acne rosacea or marginal... (Review)
Review
Demodex was first identified over 150 years ago, but only recently has it attracted wider interest as a contributor to chronic diseases such as acne rosacea or marginal blepharitis. Demodex is commonly found in the human population, in skin sebaceous glands or follicles. The frequency of Demodex infection increases with age, as it is mainly diagnosed after the age of seventy; however, it can sometimes be found in children and teenagers. Demodex is supposed to contribute to the development of marginal blepharitis or acne rosacea, but the pathogenic mechanisms have not yet been explained in detail. These diseases are chronic and the long-term treatment effects are not satisfactory. This paper presents the characteristics of Demodex as well as its prevalence in the pathogenesis of eye and skin diseases, and describes the diagnostics and treatment of these disorders.
Topics: Animals; Eye Diseases; Humans; Mite Infestations; Mites; Skin Diseases
PubMed: 24913122
DOI: 10.17219/acem/37081 -
PloS One 2022Polyphagotarsonemus latus Banks is considered a polyphagous pest of diverse agricultural and ornamental crops of global economic significance. Its distribution, host...
Polyphagotarsonemus latus Banks is considered a polyphagous pest of diverse agricultural and ornamental crops of global economic significance. Its distribution, host range, variety of symptoms, morphological differences, chaetotaxy and several ontogeny reports have advanced the idea of P. latus as a species complex. Correct pest identification leads to suitable control treatment. Therefore, the objective of this study was the identification of mites collected in two different geographic regions in Mexico (Chiapas and Guanajuato) that had been tentatively designated as Polyphagotarsonemus sp. Biometric differences on the morphology of adults as well the genetic variability were determined by taxonomical and molecular (mitochondrial COI gene) characterization techniques. The identity of the mites from both populations was confirmed as P. latus based on taxonomic characters. Biometric parameter variations were found between both populations (70.58% and 53.84% for females and males, respectively). The average sequenced fragment size was 447 bp (both populations). A homology search against six P. latus sequences available in the GenBank database revealed that sequence KM580507.1 (from India) shows 83.0-86.41% and 99.26-99.52% similarity with the sequences from Guanajuato and Chiapas, respectively. Molecular data indicated a significant divergence between the populations. The genetic distance demonstrates the population from Chiapas has a higher genetic correspondence (0.010) to the sequence from India (KM580507.1) whereas the population from Guanajuato is more distant (0.191). The genetic distance between the populations of this study and other GenBank sequences is even larger. We consider our results strengthen the hypothesis of P. latus consisting of a species-complex. However, it is essential to extend the study to other regions including its country of origin (Sri Lanka), and to include ultrastructural features.
Topics: Agriculture; Animals; Female; Host Specificity; India; Male; Mexico; Mites
PubMed: 35446869
DOI: 10.1371/journal.pone.0266335 -
The Cornell Veterinarian Apr 1976A review is presented, including some new data, of the biology of ten species of hair follicle mites (Demodex spp.) of man and domestic animals. Major topics covered are... (Review)
Review
A review is presented, including some new data, of the biology of ten species of hair follicle mites (Demodex spp.) of man and domestic animals. Major topics covered are taxonomy, host-parasite interactions, and problems in need of resolution. To this last, some information is provided on the question of species validity, the degree of host specificity and synhospitaly, population dynamics and incidence, transference and host behavior, pathogenesis and disease transmission, and control. A key is provided for species discrimination.
Topics: Animals; Cattle; Cattle Diseases; Dog Diseases; Dogs; Goats; Hair; Humans; Mite Infestations; Mites; Skin; Species Specificity
PubMed: 770074
DOI: No ID Found -
Revista Chilena de Infectologia :... Jun 2009Mites that affect animals (acariasis) can occasionally be transmitted to humans by incidental contact producing pruritus and dermatitis. Animals such as dogs, cats,... (Review)
Review
Mites that affect animals (acariasis) can occasionally be transmitted to humans by incidental contact producing pruritus and dermatitis. Animals such as dogs, cats, mice, birds and reptiles, harbour several mite species. Hemophage mites and those that feed on lymph have the potential of transmitting important zoonotic agents (cuales??). The presence of lesions of unclear origin and a history of contact with pets or wild animals should alert towards the possibility of acariasis. Diagnosis is based on direct visualization of the mite,analysis of its morphology and obtaining information on the animal host. Awareness of these acarosis and the responsible care of pets and animals are the most relevant preventive measures.
Topics: Animals; Humans; Mites; Scabies
PubMed: 19621159
DOI: No ID Found -
Transactions of the American... 1967
Topics: Acne Vulgaris; Adolescent; Adult; Age Factors; Aged; Blepharitis; Breast; Carrier State; Child; Ethanol; Eye Diseases; Eyelids; Female; Humans; Insect Vectors; Male; Middle Aged; Mite Infestations; Mites; Ointments; Pigmentation; Pityriasis; Pruritus; Sebaceous Glands; Soaps; Staphylococcal Infections
PubMed: 4229846
DOI: No ID Found -
PloS One 2018Spatial distribution is an important topic in community ecology and a key to understanding the structure and dynamics of populations and communities. However, the...
Spatial distribution is an important topic in community ecology and a key to understanding the structure and dynamics of populations and communities. However, the available information related to the spatial patterns of soil mite communities in long-term tillage agroecosystems remains insufficient. In this study, we examined the spatial patterns of soil mite communities to explain the spatial relationships between soil mite communities and soil parameters. Soil fauna were sampled three times (August, September and October 2015) at 121 locations arranged regularly within a 400 m × 400 m monitoring plot. Additionally, we estimated the physical and chemical parameters of the same sampling locations. The distribution patterns of the soil mite community and the edaphic parameters were analyzed using a range of geostatistical tools. Moran's I coefficient showed that, during each sampling period, the total abundance of the soil mite communities and the abundance of the dominant mite populations were spatially autocorrelated. The soil mite communities demonstrated clear patchy distribution patterns within the study plot. These patterns were sampling period-specific. Cross-semivariograms showed both negative and positive cross-correlations between soil mite communities and environmental factors. Mantel tests showed a significant and positive relationship between soil mite community and soil organic matter and soil pH only in August. This study demonstrated that in the cornfield, the soil mite distribution exhibited strong or moderate spatial dependence, and the mites formed patches with sizes less than one hundred meters. In addition, in this long-term tillage agroecosystem, soil factors had less influence on the observed pattern of soil mite communities. Further experiments that take into account human activity and spatial factors should be performed to study the factors that drive the spatial distribution of soil microarthropods.
Topics: Animals; China; Ecosystem; Mites; Soil
PubMed: 29953452
DOI: 10.1371/journal.pone.0199093 -
BMC Ecology Nov 2019The tomato red spider mite, Tetranychus evansi Baker & Pritchard (Acari: Tetranychidae), is an agricultural pest of solanaceous crops. Although T. evansi is of South...
BACKGROUND
The tomato red spider mite, Tetranychus evansi Baker & Pritchard (Acari: Tetranychidae), is an agricultural pest of solanaceous crops. Although T. evansi is of South American subtropical origin, it has recently expanded its distribution range to many tropical and temperate areas around the world. Its potential distribution range in response to scenarios of global warming was recently modeled, confirming its current and possible future distributions. Here, we experimentally investigated the biological traits of T. evansi in the context of the current and future global warming (2100) scenarios. Using an environmental simulation system, we tested the life-history traits of T. evansi under current summer temperatures (as of June, July, and August 2016) and under expected temperature increases based on two IPCC scenarios: RCP2.6 (+ 1 °C) and RCP8.5 (+ 3.7 °C). The mites were introduced into each scenario on 1 June and their sequential progeny were used for testing in each following month.
RESULTS
The mite could develop and reproduce under all scenarios. There was a decrease in the duration of lifespan and female fecundity at RCP8.5 during June and August, but this may be compensated for by the high intrinsic rate of increase, which implies faster population growth and shorter generation time.
CONCLUSION
Our study and other reports reveal the high adaptability of T. evansi to a wide range of summer temperatures; this may explain its current distribution. We anticipate that global warming will favor the spread of T. evansi and may further expand its distribution to a large area of the globe. These findings should be of ecological and practical relevance for designing prevention and control strategies.
Topics: Animals; Female; Global Warming; Solanum lycopersicum; Mites; Temperature; Tetranychidae
PubMed: 31771563
DOI: 10.1186/s12898-019-0264-6 -
Journal of Zhejiang University.... Apr 2012Xenorhabdus bacterium has been used as a biological control agent against Luciaphorus sp., a mushroom mite endemic in Thailand. To develop an effective formulation of...
Xenorhabdus bacterium has been used as a biological control agent against Luciaphorus sp., a mushroom mite endemic in Thailand. To develop an effective formulation of Xenorhabdus stokiae, treatments using different parts of X. stokiae isolate PB09 culture, including whole cell suspension, cell-free supernatant, and crude cell extract, were performed. The results show that different parts of X. stokiae isolate PB09 culture could induce variable effects on mite mortality and fecundity. Application with cell-free supernatant of X. stokiae culture resulted in both the highest mite mortality rate [(89.00±3.60)%] and the lowest mite fecundity [(41.33±23.69) eggs/gravid female]. Whole cell suspension of X. stokiae isolate PB09 culture was found to be slightly less effective than its cell-free supernatant, suggesting that X. stokiae was more likely to release its metabolites with acaricidal activities to the surrounding culture media. Crude cell extract of X. stokiae was not effective against mites. Cell-free supernatant of X. stokiae isolate PB09 was the most effective biological control agent and it could be conveniently used in future formulations instead of live bacteria.
Topics: Acaricides; Animals; Cell Extracts; Cell-Free System; Mites; Survival Rate; Xenorhabdus
PubMed: 22467367
DOI: 10.1631/jzus.B1100155