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https://www.readbyqxmd.com/read/27894366/evolution-of-host-range-in-the-follicle-mite-demodex-kutzeri
#1
Michael F Palopoli, VAN Tra, Kassey Matoin, Phuong D Mac
The sequences of four mitochondrial genes were determined for Demodex mites isolated from two distantly related species within the family Cervidae, and identified morphologically as belonging to the species Demodex kutzeri. The sequences were used to test the hypothesis that Demodex are strictly host-specific, and hence cospeciate with their hosts: (1) The estimated divergence time between mites found on elk vs humans agreed closely with a previous estimate of the time that these host species last shared a common ancestor, suggesting cospeciation of mites and hosts, at least over long evolutionary timescales...
November 29, 2016: Parasitology
https://www.readbyqxmd.com/read/27875092/morphological-variability-of-demodex-cati-in-a-feline-immunodeficiency-virus-positive-cat
#2
Elien R L Taffin, Stijn Casaert, Edwin Claerebout, Thomas J J Vandekerkhof, Sophie Vandenabeele
CASE DESCRIPTION A 17-year-old FIV-positive cat was evaluated because of weight loss during the preceding few months. The cat had a weight loss of 0.5 kg (1.1 lb) during the last month. Because of its FIV-positive status, the cat was confined indoors. CLINICAL FINDINGS A large nonpruritic area of alopecia with hyperpigmentation and comedones was present on the right lateral aspect of the neck. The chin had diffuse alopecia and comedones. Mild alopecia was present on the dorsal aspect of the muzzle. Trichography and microscopic examination of acetate tape imprint preparations and skin scrapings revealed a very morphologically heterogeneous population of Demodex mites...
December 1, 2016: Journal of the American Veterinary Medical Association
https://www.readbyqxmd.com/read/27828651/bacillus-cereus-strain-isolated-from-demodex-folliculorum-in-patients-with-topical-steroid-induced-rosaceiform-facial-dermatitis
#3
Alin Laurentiu Tatu, Marius Anton Ionescu, Victor Gabriel Clatici, Violeta Corina Cristea
The aim of the study was to identify Bacillus species from the Demodex folliculorum of patients with topical steroidinduced facial rosaceiform dermatitis. Of the 75 patients examined, 20% had clinical spinulosis, while 18.66% had dermoscopic features of Demodex: follicular plugs and tails. Of the 17.33% positive patients identified upon microscopy for Demodex, samples for bacterial culture were plated on trypticase soy Colombia agar. Identification was performed by microorganisms grown method mass spectrometry...
September 2016: Anais Brasileiros de Dermatologia
https://www.readbyqxmd.com/read/27802779/assessment-of-demodex-presence-in-acne-like-rash-associated-with-cetuximab
#4
Deniz Aksu Arıca, Turkan Ozturk Topcu, Leyla Baykal Selçuk, Savas Yaylı, Unzile Seyman, Evren Fidan, Sevgi Bahadır, Halil Kavgacı
CONTEXT: Cetuximab is an epidermal growth factor receptor inhibitor. It is frequently used in the treatment of solid tumors. However, it has a high potential to cause acne-like rash. Demodex mites, which are known to increase in number in immunosuppressive circumstances, are closely related to the acneiform lesions. OBJECTIVE: The aim of this study is to evaluate the presence of demodex mites in acne-like rash that appears under the treatment of Cetuximab. METHODS: We reviewed the medical records of patients who applied to our clinic with cetuximab induced papulopustular rashes between November 2014 and March 2016...
November 16, 2016: Cutaneous and Ocular Toxicology
https://www.readbyqxmd.com/read/27802314/detection-prevalence-and-phylogenetic-relationships-of-demodex-spp-and-further-skin-prostigmata-mites-acari-arachnida-in-wild-and-domestic-mammals
#5
Natalia Sastre, Olga Francino, Joseph N Curti, Tiffany C Armenta, Devaughn L Fraser, Rochelle M Kelly, Erin Hunt, Katja Silbermayr, Christine Zewe, Armand Sánchez, Lluís Ferrer
This study was conceived to detect skin mites in social mammals through real-time qPCR, and to estimate taxonomic Demodex and further Prostigmata mite relationships in different host species by comparing sequences from two genes: mitochondrial 16S rRNA and nuclear 18S rRNA. We determined the mite prevalence in the hair follicles of marmots (13%) and bats (17%). The high prevalence found in marmots and bats by sampling only one site on the body may indicate that mites are common inhabitants of their skin. Since we found three different mites (Neuchelacheles sp, Myobia sp and Penthaleus sp) in three bat species (Miotis yumanensis, Miotis californicus and Corynorhinus townsendii) and two different mites (both inferred to be members of the Prostigmata order) in one marmot species (Marmota flaviventris), we tentatively concluded that these skin mites 1) cannot be assigned to the same genus based only on a common host, and 2) seem to evolve according to the specific habitat and/or specific hair and sebaceous gland of the mammalian host...
2016: PloS One
https://www.readbyqxmd.com/read/27796564/parasites-and-vector-borne-diseases-in-client-owned-dogs-in-albania-infestation-with-arthropod-ectoparasites
#6
Enstela Shukullari, Dhimitër Rapti, Martin Visser, Kurt Pfister, Steffen Rehbein
To establish the diversity and seasonality of ectoparasite infestation in client-owned dogs in Albania, 602 dogs visiting four small animal clinics in Tirana from March 2010 to April 2011 inclusive were examined for ectoparasites by full body search and total body comb. In addition, ear swab specimens collected from all dogs and scrapings taken from skin lesions suspicious of mite infestation were examined for parasitic mites. Overall, 93 dogs (15.4 %, 95%CI 12.6-18.6) were demonstrated to be infested, and nine species of ectoparasites were identified: Ixodes ricinus, 0...
October 29, 2016: Parasitology Research
https://www.readbyqxmd.com/read/27787205/ocular-symptoms-reported-by-patients-infested-with-demodex-mites
#7
Aleksandra Sędzikowska, Maciej Osęka, Barbara Grytner-Zięcina
The purpose of this study was to determine subjective ocular symptoms occurring in patients infested with Demodex. The number of Demodex mites in the obtained material that correlated with the appearance of ocular symptoms was estimated. The study material were eyelashes collected from 1499 patients. The material were observed under a light microscope. T-test, the logistic regression method, and Pearson correlation coefficient were used for the analysis. Demodex mites were detected in 47% patients. The mean ages of infected women and men were 64 and 59 years, respectively...
December 1, 2016: Acta Parasitologica
https://www.readbyqxmd.com/read/27600257/efficacy-and-safety-of-permethrin-5-topical-gel-vs-placebo-for-rosacea-a-double-blind-randomized-controlled-clinical-trial
#8
K Raoufinejad, P Mansouri, M Rajabi, Z Naraghi, R Jebraeili
BACKGROUND: Rosacea is a chronic, multifactorial, dermatological condition. Increased density of Demodex folliculorum mites in the skin of rosacea patients suggests a possible role for these mites in the pathophysiology of rosacea. OBJECTIVE: To evaluate the effects of permethrin 5% topical gel vs. placebo on Demodex density (Dd) and clinical presentations of rosacea patients, and also to further refine the quantitative assessment of Dd in the non-invasive standard skin surface biopsy (SSSB)...
September 7, 2016: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/27579708/dermoscopy-confocal-microscopy-and-optical-coherence-tomography-for-the-diagnosis-of-bedbug-infestation
#9
E Cinotti, M Espinasse, B Labeille, F Cambazard, J L Perrot
A 33 year-old woman suffering from rosacea presented with outbreaks of itchy plaques on her face and limbs that curiously improved when she was far from home during summer holidays (Fig. 1). Dermoscopy (FotoFinder Systems GmbH, Bad Birnbach, Germany) showed petechiae (Fig. 2A) and reflectance confocal microscopy (RCM; Vivascope 3000(®) , Caliber, New York, USA, distributed in Europe by MAVIG GmbH, München, Germany) showed intraepidermal vesicles (Fig. 2B) suggesting parasite bites. RCM found Demodex folliculorum (Fig...
August 31, 2016: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/27573185/two-consecutive-standardized-skin-surface-biopsies-an-improved-sampling-method-to-evaluate-demodex-density-as-a-diagnostic-tool-for-rosacea-and-demodicosis
#10
Fabienne M N Forton, Viviane De Maertelaer
Diagnosing papulopustular rosacea is not always straightforward; no specific diagnostic test is currently available. A high density of Demodex mites is consistently observed in this condition. This retrospective study assesses an improved method for evaluating Demodex density among 1,044 patients presenting to our dermatology practice. The skin was cleaned with ether and Demodex densities were measured in 2 consecutive standardized skin surface biopsies taken from the same site. Mean densities in patients with rosacea and demodicosis were much higher than those in healthy controls and patients with other facial dermatoses...
August 30, 2016: Acta Dermato-venereologica
https://www.readbyqxmd.com/read/27538858/demodex-musculi-infestation-in-genetically-immunomodulated-mice
#11
Peter C Smith, Caroline J Zeiss, Amanda P Beck, Jodi A Scholz
Demodex musculi, a prostigmatid mite that has been reported infrequently in laboratory mice, has been identified with increasing frequency in contemporary colonies of immunodeficient mice. Here we describe 2 episodes of D. musculi infestation with associated clinical signs in various genetically engineered mouse strains, as well as treatment strategies and an investigation into transmissibility and host susceptibility. The first case involved D. musculi associated with clinical signs and pathologic lesions in BALB/c-Tg(DO11...
2016: Comparative Medicine
https://www.readbyqxmd.com/read/27399141/treatment-of-mites-folliculitis-with-an-ornidazole-based-sequential-therapy-a-randomized-trial
#12
Yang Luo, Yu-Jiao Sun, Li Zhang, Xiu-Li Luan
OBJECTIVE: Treatment of Demodex infestations is often inadequate and associated with low effective rate. We sought to evaluate the efficacy of an ornidazole-based sequential therapy for mites folliculitis treatment. METHODS: Two-hundred patients with mites folliculitis were sequentially treated with either an ornidazole- or metronidazole-based regimen. Sebum cutaneum was extruded from the sebaceous glands of each patient's nose and the presence of Demodex mites were examined by light microscopy...
July 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27362250/increased-density-of-demodex-folliculorum-may-be-related-to-additional-risk-factors
#13
Emine Unal, Ulviye Guvendi Akcinar, Yalcin Basaran
No abstract text is available yet for this article.
July 2016: Archives of Iranian Medicine
https://www.readbyqxmd.com/read/27341742/demodex-phylloides-infection-in-swine-reared-in-a-peri-urban-family-farm-located-on-the-outskirts-of-the-metropolitan-region-of-s%C3%A3-o-paulo-brazil
#14
Josete Garcia Bersano, Márcia Cristina Mendes, Fernanda Calvo Duarte, Claudia Del Fava, Sueli Moda de Oliveira, Elizabeth Spósito Filha, Eliana Scarcelli Pinheiro, Alessandra Figueiredo de Castro Nassar, Maria Cristina de Vasconcellos Bilynskyj, Renato Akio Ogata, Paulo Henrique Selbmann Sampaio, Margareth Élide Genovez
This paper reports the occurrence of porcine demodicosis caused by the mite Demodex phylloides in hogs reared in a peri-urban family farm located in Francisco Morato, a municipality of the Metropolitan Region of São Paulo, capital city of the state of São Paulo, Brazil. In a parcel of forty Landrace - Large White cross hogs, approximately four months old, four animals presented severe skin lesions in the form of small nodules over their entire body, especially in the periocular region, snout, lower abdomen and flanks...
June 8, 2016: Veterinary Parasitology
https://www.readbyqxmd.com/read/27305511/-development-of-a-pcr-for-the-detection-and-quantification-of-parasitism-by-demodex-folliculorum-infestation-in-biopsies-of-skin-neoplasms-periocular-area
#15
A Tenorio-Abreu, J C Sánchez-España, L E Naranjo-González, M C González-Gallego, C Hidalgo-Grass, C Ruíz-Frutos
OBJECTIVE: To standardize the relative quantification by mass of tissue parasitism by Demodex folliculorum infestation from neoplastic skin biopsies periocular using molecular amplification to study the possible relationship of the appearance of eyelid basal cell carcinoma with the presence and density of the mite in later works. METHODS: A quantitative PCR was developed real-time probes TaqMan. PCR was tested in a pilot 46 actual biopsy samples nodular basal cell carcinoma series...
August 2016: Revista Española de Quimioterapia: Publicación Oficial de la Sociedad Española de Quimioterapia
https://www.readbyqxmd.com/read/27259538/comparison-of-parasitic-mite-retrieval-methods-in-a-population-of-community-cats
#16
Catherine Milley, Michael Dryden, Wayne Rosenkrantz, Joya Griffin, Christopher Reeder
OBJECTIVES: This study compared methods of mite retrieval from community cats in the Ohio River Valley region of the USA and determined incidence of parasitic mites in this region. METHODS: In total, 493 community cats were humanely trapped and anesthetized for a trap-neuter-return program. Cats received a dermatologic examination, ear swabs, superficial skin scraping, flea combing, acetate tape preparation and feces collection. All samples were examined microscopically...
June 3, 2016: Journal of Feline Medicine and Surgery
https://www.readbyqxmd.com/read/27244957/prevalence-of-demodex-ectoparasites-among-humans-in-ordu-province-in-turkey
#17
Ülkü Karaman, Zeynep Kolören, Özgür Enginyurt, Cemil Çolak
Demodex folliculorum and Demodex brevis are common ectoparasites in humans. Demodex parasite infestations have not been determined in the province of Ordu. We determined the prevalence of Demodex species among humans in Ordu Provience, Turkey. Seven hundred ninety-nine subjects (438 males and 361 females) aged ≥ 18 years living in the central districts of Ordu Province, Turkey, were selected using the World Health Organization cluster sampling method. A superficial skin biopsy of the face was obtained from each subject...
March 2016: Southeast Asian Journal of Tropical Medicine and Public Health
https://www.readbyqxmd.com/read/27222243/in-vivo-confocal-microscopy-evaluation-of-ocular-and-cutaneous-alterations-in-patients-with-rosacea
#18
Hong Liang, Matthieu Randon, Sylvain Michee, Rachid Tahiri, Antoine Labbe, Christophe Baudouin
AIMS: The physiopathology of rosacea and the correlation between ocular and cutaneous rosacea remains unclear. This study analysed ocular and cutaneous rosacea with in vivo confocal microscopy (IVCM). METHODS: Thirty-four eyes of 34 patients with confirmed rosacea-associated meibomian gland dysfunction-related evaporative dry eye were enrolled in the study. The ophthalmological investigations included dry eye ocular surface disease index (OSDI), the Schirmer test, tear osmolarity, tear break up time, the Oxford score, infrared meibography for meibomian gland (MG) analysis and IVCM investigation for cornea, MG and skin analysis (cheek, hand)...
May 24, 2016: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/27197131/-demodex-folliculorum-a-hidden-cause-of-blepharitis
#19
Sigurlaug Gunnarsdottir, Arni Kristmundsson, Mark A Freeman, Olafur Mar Bjornsson, Gunnar Mar Zoega
UNLABELLED: Meibomian gland dysfunction (MGD) is a common cause of dry eye disease. Demodex mites can cause MGD with symptoms like itching, dryness and general ocular discomfort. It is important to consider infestation with Demodex mites in individuals who are non responsive to traditional MGD treatment but also equally important when cylindrical dandruff is seen at the base of the eye lashes.. We report two individuals who had not responded to ocular and systemic treatment for MGD and were then diagnosed with Demodex mites...
May 2016: Læknablađiđ
https://www.readbyqxmd.com/read/27160273/demodex-species-in-human-ocular-disease-new-clinicopathological-aspects
#20
Stephen G Nicholls, Carmen L Oakley, Andrea Tan, Brendan J Vote
Demodex brevis and Demodex folliculorum are likely ubiquitous organisms associated with human eyelashes. However, they have also been implicated in the pathogenesis of external ocular diseases. This article reviews the current literature in regards to life cycle, morphology, pathogenesis and treatment of underlying Demodex spp. infestation and outlines the previously undescribed in vivo behaviour of the mites. Images were obtained from the epilation of lashes from 404 patients seen in clinical practice. Epilated lashes were placed on a microscope slide which had been coated with optically clear hypromellose/carbomer gel (Genteal gel, Novartis pharmaceuticals corporation, East Hanover, New Jersey)...
May 9, 2016: International Ophthalmology
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