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Turkiye Parazitolojii Dergisi Mar 2022An increase in the counts of the mites that exist in the microbiota of healthy individuals may lead to some dermatological diseases. This study aimed to investigate the...
OBJECTIVE
An increase in the counts of the mites that exist in the microbiota of healthy individuals may lead to some dermatological diseases. This study aimed to investigate the prevalence of spp. among patients diagnosed with acne vulgaris, rosacea, perioral dermatitis, seborrheic dermatitis, eczema, and pityriasis folliculorum and the relationship between the demographic and clinical data of such patients and .
METHODS
This study included 144 patients (70 with acne vulgaris, 6 with pityriasis folliculorum, 15 with seborrheic dermatitis, 39 with rosacea, 8 with eczema, and 6 with perioral dermatitis) and 73 healthy subjects. We evaluated positivity using the standard superficial skin biopsy method in all groups. The presence of more than five mites per square centimeter was considered positive at the diagnosis.
RESULTS
Of the 144 patients included in the study, 107 (74.3%) were female, and 37 (25.7%) were male, while 40 (54.8%) of the 73 healthy subjects were female, and 33 (45.2%) were male. Twenty-one patients (14.5%) and five of the healthy subjects (6.8%) tested positive for . We found that positivity rates in the rosacea and acne vulgaris groups were higher than in the control group. However, this level was not statistically significant (p>0.05). We found the highest positivity rate among the patient groups in the pityriasis folliculorum (4/6, 66.7%), rosacea (8/39, 20.5%), and perioral dermatitis (1/6, 16.7%) groups. Lastly, we found no statistically significant relationship between the demographic and clinical characteristics of the groups and positivity (p>0.05).
CONCLUSION
The present study is the only study that investigated positivity in six different dermatological diseases. Based on the results, we believe that investigating spp. positivity in dermatological diseases such as acne vulgaris, rosacea, and pityriasis folliculorum would be beneficial for early diagnosis and treatment.
Topics: Animals; Female; Humans; Male; Mite Infestations; Mites; Prevalence; Rosacea; Skin
PubMed: 35232707
DOI: 10.4274/tpd.galenos.2021.93685 -
Scientific Reports Aug 2021Although mites (Acari) are abundant in many terrestrial and freshwater ecosystems, their diversity is poorly understood. Since most mite species can be distinguished by...
Although mites (Acari) are abundant in many terrestrial and freshwater ecosystems, their diversity is poorly understood. Since most mite species can be distinguished by variation in the DNA barcode region of cytochrome c oxidase I, the Barcode Index Number (BIN) system provides a reliable species proxy that facilitates large-scale surveys. Such analysis reveals many new BINs that can only be identified as Acari until they are examined by a taxonomic specialist. This study demonstrates that the Barcode of Life Datasystem's identification engine (BOLD ID) generally delivers correct ordinal and family assignments from both full-length DNA barcodes and their truncated versions gathered in metabarcoding studies. This result was demonstrated by examining BOLD ID's capacity to assign 7021 mite BINs to their correct order (4) and family (189). Identification success improved with sequence length and taxon coverage but varied among orders indicating the need for lineage-specific thresholds. A strict sequence similarity threshold (86.6%) prevented all ordinal misassignments and allowed the identification of 78.6% of the 7021 BINs. However, higher thresholds were required to eliminate family misassignments for Sarcoptiformes (89.9%), and Trombidiformes (91.4%), consequently reducing the proportion of BINs identified to 68.6%. Lineages with low barcode coverage in the reference library should be prioritized for barcode library expansion to improve assignment success.
Topics: Acari; Animals; Biodiversity; DNA; DNA Barcoding, Taxonomic; Ecosystem; Electron Transport Complex IV; Gene Library; Genetic Techniques; Mites
PubMed: 34354125
DOI: 10.1038/s41598-021-95147-8 -
Scientific Reports Feb 2022Hymenopteran parasitoids are well known for their ubiquitous diversity, important ecological roles and biocontrol potential. We report the first detailed documentation...
Hymenopteran parasitoids are well known for their ubiquitous diversity, important ecological roles and biocontrol potential. We report the first detailed documentation of mite predation by a parasitoid wasp, Bracon predatorius Ranjith & Quicke sp. nov., (Insecta: Hymenoptera), first case of obligate predatory behaviour in the family Braconidae and first case of mite feeding within the superfamily Ichneumonoidea. Larvae of a new wasp species are shown to develop entirely as predators of eriophyid mites that induce leaf galls in a commercially important plant. They display highly modified head capsule morphology that we interpret as being associated with this atypical life style. We propose that the new feeding strategy evolved separately from recently described entomophytophagy in another species of the same genus. The divergent larval morphological adaptations of both species indicate a high degree of evolutionary developmental plasticity in the developmental stage.
Topics: Animals; Biological Evolution; Hymenoptera; Larva; Mites; Pest Control, Biological; Predatory Behavior; Wasps
PubMed: 35110585
DOI: 10.1038/s41598-022-05705-x -
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 -
Journal of Economic Entomology Feb 2023Several resistance traits have been proposed to select honey bees (Apis mellifera L.) that can survive in the presence of parasitic mite Varroa destructor (Anderson and...
Several resistance traits have been proposed to select honey bees (Apis mellifera L.) that can survive in the presence of parasitic mite Varroa destructor (Anderson and Trueman) and enable a more sustainable apiculture. The interest for uncapping-recapping has recently increased following its identification in several naturally surviving honey bee populations, yet the utility of this trait for human-mediated selection is poorly known. Here, we evaluated the repeatability of recapping and its correlations with mite infestation levels, and assessed the expression of the trait in the often neglected drone brood. We also calculated correlations between recapping, mite infertility, and mite fecundity, expressed either at the level of individual brood cells or of the whole colony. Recapping measured in worker brood showed moderate repeatability (ranging between 0.30 and 0.46). Depending on sample, recapping slightly correlated negatively with colony infestation values. Recapping was also measured in drone brood, with values often comparable to recapping in worker brood, but no significant correlations were obtained between castes. At cell level, recapped cells in drone brood (but not in workers) were significantly less infested than nonrecapped cells, whereas in workers (but not in drones), recapped cells hosted mites with significantly lower fecundity. At colony level, with a few exceptions, recapping did not significantly correlate with mite infertility and fecundity, caste, sample, or number of infested cells considered. These results indicate limited possibilities of impeding mite reproduction and possibly mite infestation of honey bee colonies by recapping, which would need to be confirmed on larger, different populations.
Topics: Humans; Bees; Animals; Varroidae; Hymenoptera; Mite Infestations; Reproduction; Infertility
PubMed: 36453974
DOI: 10.1093/jee/toac186 -
Parasitology Aug 2023Rodents are known hosts for various ectoparasite taxa such as fleas, lice, ticks and mites. South Africa is recognized for its animal diversity, yet little is published...
Rodents are known hosts for various ectoparasite taxa such as fleas, lice, ticks and mites. South Africa is recognized for its animal diversity, yet little is published about the parasite diversity associated with wild rodent species. By focusing on a wildlife-human/domestic animal interface, the study aims to record ectoparasite diversity and levels of infestations of the Bushveld gerbil, , and to establish the relationship between ectoparasite infestation parameters and host- and habitat factors. Rodents ( = 127) were trapped in 2 habitat types (natural and agricultural) during 2014–2020. More than 6500 individuals of 32 epifaunistic species represented by 21 genera and belonging to 5 taxonomic groups (fleas, sucking lice, ticks, mesostigmatan mites and trombiculid mites) were collected. Mesostigmatan mites and lice were the most abundant and fleas and mesostigmatan mites the most prevalent groups. Flea and mesostigmatan mite numbers and mesostigmatan mite species richness was significantly higher on reproductively active male than female rodents. Only ticks were significantly associated with habitat type, with significantly higher tick numbers and more tick species on rodents in the natural compared to the agricultural habitat. We conclude that the level of infestation by ectoparasites closely associated with the host (fleas and mites) was affected by host-associated factors, while infestation by ectoparasite that spend most of their life in the external environment (ticks) was affected by habitat type.
Topics: Animals; Male; Female; Humans; Gerbillinae; Ectoparasitic Infestations; Mites; Ticks; Flea Infestations; Siphonaptera; Phthiraptera; Trombiculidae; Ecosystem
PubMed: 37272490
DOI: 10.1017/S0031182023000562 -
Journal of Economic Entomology Dec 2023Severe bermudagrass mite (Aceria cynodoniensis Sayed) infestation stunts turfgrass growth and reduces the aesthetic and recreational value of managed bermudagrass....
Severe bermudagrass mite (Aceria cynodoniensis Sayed) infestation stunts turfgrass growth and reduces the aesthetic and recreational value of managed bermudagrass. Management practices, such as fertilization, mowing, and irrigation, may impact bermudagrass mite infestation and damage, but empirical evidence is lacking. Two 20 wk experiments were conducted with potted bermudagrass in a greenhouse or nursery to evaluate the effect of varying nitrogen rates (0, 24.5, or 49 kg N/ha), mowing heights (1.3, 2.5, 3.8, or 5 cm), and irrigation rates (60%, 100%, or 140% evapotranspiration [ET] rate) on the densities of witch's brooms (i.e., stunted and deformed terminals symptomatic of infestation) and bermudagrass mites. Increasing nitrogen fertility from 0 to 49 kg N/ha increased witch's broom and bermudagrass mite densities by 292% and 339%, respectively. Bermudagrass fertilized with nitrogen maintained higher turf quality than unfertilized grass despite greater mite damage. Decreasing irrigation from 140% to 60% of the ET rate also increased witch's broom densities by 124%. Mowing height did not consistently affect witch's broom or mite densities. Witch's broom and mite densities were positively correlated and followed a general trend with greater densities in April-August and a decline in densities in August-October. These findings suggest that nitrogen fertilization and water stress influence bermudagrass mite damage. Thus, limiting nitrogen fertilization to a level necessary to maintain turfgrass health and quality (0.5 kg N/ha) and minimizing turfgrass water stress can complement current chemical control strategies as part of an integrated pest management program.
Topics: Animals; Mites; Cynodon; Nitrogen; Dehydration; Fertility
PubMed: 37950912
DOI: 10.1093/jee/toad205 -
BioMed Research International 2022The purpose of our study is to see how beneficial is tea tree oil (TTO) for treating chronic blepharitis topically, with a focus on the Demodex mite. To discover all... (Review)
Review
The purpose of our study is to see how beneficial is tea tree oil (TTO) for treating chronic blepharitis topically, with a focus on the Demodex mite. To discover all possibly relevant published papers, an accurate Pubmed database search analysis of the current literature was undertaken from 2012 to December 2021. Fourteen papers dealing with the use of TTO to treat chronic blepharitis have been found. The effectiveness of TTO treatment was tested in vitro by 4 authors and in vivo by 10 authors. All studied confirmed efficacy of TTO treatment, even cyclic, on Demodex mite blepharitis. TTO can be used for lid scrubs, facial cleanser, eyelid patch, eyelid gel, eyelash shampoo or, more commonly, as TTO impregnated eyelid wipes. The scientific evidence of TTO for chronic blepharitis treatment gives a lot of confidence for the progress that this treatment may have in the future clinical practice.
Topics: Animals; Blepharitis; Eye Infections, Parasitic; Eyelashes; Humans; Mite Infestations; Mites; Tea Tree Oil
PubMed: 35941981
DOI: 10.1155/2022/9204251 -
Parasites & Vectors Dec 2022Documentation on water mites in Spain is scarce, as is information on the parasite-host relationship between certain water mite species and representatives of the...
BACKGROUND
Documentation on water mites in Spain is scarce, as is information on the parasite-host relationship between certain water mite species and representatives of the dipteran family Simuliidae. The discomfort caused to humans and animals by black flies seems to be increasing in recent years. In this context, an investigation of parasitic water mites is of great importance, not only from the point of view of biodiversity, but also in terms of their potential to control black fly populations.
METHODS
Rivers across a wide region of eastern Spain were sampled to determine the specific richness of simuliid dipterans and to investigate their possible parasites, such as water mites, mermithid nematodes and microsporidia (fungal microbes). Data on environmental variables, abundance, prevalence and intensity of parasitism on the collected specimens were analyzed.
RESULTS
In 10 streams, 15,396 simuliid pupae were collected and checked for the presence of water mite larvae; 426 pupae in seven streams were found to be associated with water mite larvae. Of the 21 simuliid species identified based on morphological characters, eight were found to be associated with water mite larvae. Water mite infection was not equally distributed among black fly species. Also, the prevalence of parasitism was low and differed among simuliid species, ranging from one to 13 water mites per black fly pupa. Variation at the intra- and interspecific levels was detected in terms of the number of water mites inside the black fly cocoons. Free-living deutonymphal and adult water mites representing 15 different species of six genera and five families were morphologically identified. The taxonomic identity of the parasitic mite larvae is unclear at present. Morphologically, they fit descriptions of larval Sperchon (Hispidosperchon) algeriensis Lundblad, 1942, but the possibility cannot be excluded that they represent Sperchon algeriensis, the most abundant species at the adult stage in this study and unknown at the larval stage, or even another species of the genus. A molecular analysis produced for the first time cytochrome oxidase I gene sequences for S. algeriensis.
CONCLUSIONS
Our results contribute to current knowledge on Spanish Hydrachnidia and their relationships with simuliids as hosts. However, further research is needed to evaluate the diversity, distribution, bioecology and prevalence of this parasitism.
Topics: Humans; Animals; Simuliidae; Mites; Parasites; Water; Spain; Pupa; Larva
PubMed: 36528694
DOI: 10.1186/s13071-022-05610-2 -
Sichuan Da Xue Xue Bao. Yi Xue Ban =... Sep 2021To explore the clinical efficacy and influencing factors of children receiving mite-specific subcutaneous immunotherapy (SCIT).
OBJECTIVE
To explore the clinical efficacy and influencing factors of children receiving mite-specific subcutaneous immunotherapy (SCIT).
METHODS
We retrospectively analyzed the data of children who had received mite SCIT for 3 years at the Desensitization Center of our hospital. We used the daily medication score (DMS) to evaluate the medication use status (the higher the score, the higher the amount of medications given and the less satisfactorily was the primary disease controlled) and we used the visual analogue scale (VAS) to evaluate clinical symptoms (the higher the score, the more severe the symptoms). Evaluation was performed after the first SCIT treatment and after treatment was given for 3 months, 4 months, 12 months, and 3 years. According to whether medication for the primary disease was stopped after 3 years, the patients were divided into two groups, the discontinued medication group (discontinued group) and the continued medication group (continued group). The general data, DMS, VAS and the decline rate of the two groups were compared, and logistic regression was performed to analyze the influencing factors of the outcome.
RESULTS
A total of 711 children were enrolled in the study, with an average age of 8.38 years at the time of the first visit to the hospital. There were 442 males and 269 females. Skin prick test showed that 445 cases only had mite allergy, and 266 cases had mite allergy combined with other allergies. 360 cases have discontinued the medication for the primary disease after 3 years, and 351 cases had relieved symptoms, but still needed to continue with the medication. At the beginning of SCIT treatment, the DMS and VAS of the discontinued group were lower than those of the continued group ( <0.05). Evaluations from 3 months to 3 years showed that both DMS and VAS continued to decrease compared with those from the beginning, and the decline rate of DMS and VAS of the discontinued group was higher than that of the continued group after 3 years of SCIT ( <0.05). After 3 months of SCIT, the positive rates of nasal and ocular symptoms in the discontinued group were lower than those in the continued group ( <0.05). After 3 years of SCIT, the positive rates of nasal, ocular, and chest symptoms in the discontinued group were lower than those in the continued group ( <0.05). Univariate analysis combined with multivariate logistic regression showed that initial DMS>4 points and initial VAS>3.5 points were protective factors for the discontinuation of the medication for the primary disease at the end of 3 years of SCIT, while the female sex and DMS reduction rate after 12 months of treatment>50% were risk factors for discontinuation.
CONCLUSIONS
Mite SCIT can help relieve clinical symptoms and reduce the use of medication for symptomatic treatment. Symptoms can be improved after 3 months of SCIT, with the fastest improvement shown in nasal and eye symptoms. It is not recommended to discontinue the medication for the primary disease for too much after 1 year of treatment.
Topics: Animals; Asthma; Child; Female; Humans; Immunotherapy; Injections, Subcutaneous; Male; Mites; Retrospective Studies
PubMed: 34622604
DOI: 10.12182/20210960205