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Demodex

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https://www.readbyqxmd.com/read/29426737/-demodex-genus-colonizing-parasites-of-healthy-people-or-mites-associated-with-ocular-pathology
#1
Florencia Mongi, Laura Laconte, Rodolfo D Casero
Demodex folliculorum and Demodex brevis are mites that are responsible for human demodicosis affecting skin and frequently linked to ocular diseasess. The aim of this work was to determine the association between Demodex sp. and eyelid and eyelash diseases and to establish the predisposing factors for acquiring this parasitic disease. Eyelashes from symptomatic and asymptomatic patients (n=72) between 9 and 82 years old were analyzed, where 53% were positive for Demodex sp., of which 66% manifested ocular symptoms and pathologies, blepharitis and dry eye being prevalent...
February 6, 2018: Revista Argentina de Microbiología
https://www.readbyqxmd.com/read/29380184/ocular-demodex-folliculorum-prevalence-and-associated-symptoms-in-an-irish-population
#2
Orla Murphy, Veronica O'Dwyer, Aoife Lloyd-McKernan
PURPOSE: To investigate the prevalence of ocular Demodex folliculorum (DF) in an Irish population. To validate a modified Ocular Surface Disease Index questionnaire and employ it to evaluate the relationship between dry eye symptoms and the presence of DF. METHODS: One hundred and fifty-six subjects were enrolled in an epidemiological cross-sectional prevalence study. Each subject completed a novel questionnaire on ocular symptoms and was assessed for the presence of DF...
January 29, 2018: International Ophthalmology
https://www.readbyqxmd.com/read/29379270/satisfaction-and-convenience-of-using-terpenoid-impregnated-eyelid-wipes-and-teaching-method-in-people-without-blepharitis
#3
Tian Yu Qiu, Sharon Yeo, Louis Tong
Purpose: Demodex infestations cause blepharitis and are difficult to treat. Recently, a new type of eyelid wipes with terpenoids has been found effective. We aim to evaluate patient satisfaction after short-term use and compare two teaching modalities on the techniques of use. Patients and methods: Eligible participants were taught to use eyelid wipes (Cliradex®) by either live or online video demonstration based on random allocation. Participants used the wipes twice daily for a week...
2018: Clinical Ophthalmology
https://www.readbyqxmd.com/read/29364436/investigation-of-demodex-folliculorum-frequency-in-patients-with-polycystic-ovary-syndrome
#4
Ayla Eser, Seval Erpolat, Ikbal Kaygusuz, Hatice Balci, Aydin Kosus
BACKGROUND: Background: Demodex mites are acari that reside in the pilosebaceous unit of the skin and have been associated with skin disorders. OBJECTIVE: The objective of this study was to investigate the prevalence of Demodex folliculorum (D. folliculorum) mites in polycystic ovary syndrome patients as well as to examine the relationship between Demodex infestation and the presence of acne and oily or dry skin types in polycystic ovary syndrome patients. METHODS: 41 polycystic ovary syndrome patients and 47 non-polycystic ovary syndrome control subjects were enrolled in the study...
November 2017: Anais Brasileiros de Dermatologia
https://www.readbyqxmd.com/read/29351090/parasitic-infections-of-the-skin-and-subcutaneous-tissues
#5
Andrew P Norgan, Bobbi S Pritt
A variety of arthropods, protozoa, and helminths infect the skin and subcutaneous tissues and may be identified by anatomic pathologists in standard cytology and histology preparations. The specific organisms seen vary greatly with the patient's exposure history, including travel to or residence in endemic countries. Arthropods are the most commonly encountered parasites in the skin and subcutaneous tissues and include Sarcoptes scabei, Demodex species, Tunga penetrans, and myiasis-causing fly larvae. Protozoal parasites such as Leishmania may also be common in some settings...
March 2018: Advances in Anatomic Pathology
https://www.readbyqxmd.com/read/29309708/a-new-stubby-species-of-demodectic-mite-acari-demodicidae-from-the-domestic-dog-canidae
#6
Tatsushi Morita, Aki Ohmi, Akihito Kiwaki, Kazunori Ike, Katsuyuki Nagata
A new species of Demodex was detected in the earwax of a dog with otitis externa in Saitama Prefecture, Japan, in July 2010. The opisthosoma length of the mite was slightly shorter than 1/2 of its body length, which was different from the other species in domestic dogs, D. canis and D. injai, but was similar to the form of mites termed "short-bodied species", including D. cornei. However, the stubby external form was morphologically different from those of "short-bodied species", excluding a case without a species description reported from Greece...
January 4, 2018: Journal of Medical Entomology
https://www.readbyqxmd.com/read/29283119/demodex-and-rosacea-is-there-a-relationship
#7
Diana Gonzalez-Hinojosa, Alejandro Jaime-Villalonga, Gustavo Aguilar-Montes, Lorena Lammoglia-Ordiales
PURPOSE: The objective of the study is to compare the frequency of Demodex on the eyelash follicle of patients with rosacea and referents without rosacea or ophthalmological disorders. METHODS: This is a comparative, open, observational, and cross-sectional study that included 41 patients diagnosed with rosacea and 41 referents without rosacea diagnosis or ophthalmic alterations. The individuals underwent a slit-lamp examination in which two eyelashes per eyelid were removed with fine forceps...
January 2018: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/29240866/pityriasis-folliculorum-response-to-topical-ivermectin
#8
Kavita Darji, Nicole M Burkemper
<p>Pityriasis folliculorum has been described as a dry type of rosacea with extensive proliferation of Demodex folliculorum in pilosebaceous follicles of the skin. This skin condition is frequently difficult to manage, with various treatment options showing mixed efficacy. Oral ivermectin, a macrocyclic lactone parasiticide with anti-inflammatory and anti-parasitic effects, is one of the leading treatment modalities for demodicosis. Topical ivermectin has recently been FDA approved as therapy for rosacea...
December 1, 2017: Journal of Drugs in Dermatology: JDD
https://www.readbyqxmd.com/read/29224027/a-clinical-scoring-system-for-diagnosis-of-ocular-demodicosis
#9
Oktay Alver, Sertaç Argun Kıvanç, Berna Akova Budak, Nazmiye Ülkü Tüzemen, Beyza Ener, Ahmet Tuncer Özmen
BACKGROUND Demodex may cause chronic and refractory blepharitis with associated ocular surface problems, and its diagnosis and treatment can be quite challenging. In this study, our aim was to assess the efficacy of tea tree oil in Demodex treatment on caucasian patients in an industrialized region of Turkey, and to develop a systematic scoring system for extremely accurate diagnosis in the absence of advanced facilities. MATERIAL AND METHODS Charts of 412 patients with blepharitis were reviewed. A group of 39 out of 412 cases were identified as chronic and treatment-refractory, and therefore were enrolled in this study...
December 10, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/29194776/endosymbiosis-and-its-significance-in-dermatology
#10
REVIEW
K Kubiak, H Sielawa, W Chen, E Dzika
Proposed at the beginning of the twentieth century to explain the origin of eukaryotic organelles from prokaryotes, endosymbiosis is now medically defined by various interaction patterns between microorganisms and their residing hosts, best exemplified by the bacterial endosymbiont Wolbachia identified in arthropods and filarial nematodes, which can influence normal development, reproduction, survival and transmission of the hosts. Based on the transmission modes, vertical or horizontal, and the function of the endosymbionts, the host-symbiont dependence can be divided into primary or secondary...
December 1, 2017: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/29165413/-ophthalmoferon-efficacy-in-the-treatment-of-children-with-chronic-blepharoconjunctivitis
#11
L P Prozornaya, V V Brzheskiy
AIM: To study possibilities of using the medication Ophthalmoferon in the treatment of children with chronic allergic and Demodex blepharoconjunctivitis. MATERIAL AND METHODS: We examined 40 children (80 eyes) aged 3 to 17 years with chronic allergic (group I) and Demodex (group II) blepharoconjunctivitis. Each group was divided into two subgroups ('A' and 'B') respectively based on the treatment regimen used. Subgroup 'A' patients received Ophtalmoferon instillations (four times per day for four weeks) in addition to the standard therapy, whereas subgroup 'B' patients got only basic treatment of blepharoconjunctivitis...
2017: Vestnik Oftalmologii
https://www.readbyqxmd.com/read/29090055/severe-rosacea-a-case-report
#12
Ebrahim Shirzadeh, Abbas Bagheri, Mojtaba Fattahi Abdizadeh, Mozhgan Rezaei Kanavi
PURPOSE: To describe a case of severe rosacea with ocular involvement. CASE REPORT: A 28-year-old female patient presented with extensive facial and ocular eruptions. She had a history of treatment with oral prednisolone due to the clinical diagnosis of lupus erythematosus (LE), which had resulted in transient improvement of the lesions, but was followed by exacerbation of the lesions. With the clinical diagnosis of severe oculofacial rosacea, she was successfully treated with oral doxycycline, steroid eye drops, and ocular lubricants...
October 2017: Journal of Ophthalmic & Vision Research
https://www.readbyqxmd.com/read/29089049/efficacy-of-lotilaner-credelio%C3%A2-a-novel-oral-isoxazoline-against-naturally-occurring-mange-mite-infestations-in-dogs-caused-by-demodex-spp
#13
Daniel E Snyder, Scott Wiseman, Julian E Liebenberg
BACKGROUND: The oral systemic efficacy of lotilaner (Credelio™, Elanco) was evaluated against Demodex spp. in naturally infested dogs with generalized demodicosis. METHODS: In this study, 10 dogs with clinical signs of generalized demodicosis and positive for Demodex spp. mites based on skin scrapings were assigned to a single group orally treated with lotilaner (minimum dose of 20 mg/kg) on Days 0, 28 and 56. RESULTS: For lotilaner-treated dogs, pre-treatment mite counts based on skin scrapings performed at five different sites were reduced by > 99...
November 1, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/29074306/the-efficacy-of-tea-tree-face-wash-1-2-octanediol-and-microblepharoexfoliation-in-treating-demodex-folliculorum-blepharitis
#14
Orla Murphy, Veronica O'Dwyer, Aoife Lloyd-McKernan
PURPOSE: To compare the efficacy of Dr Organic Tea Tree Face Wash, OcuSoft Lids Scrub Plus and the BlephEx™ device at treating of Demodex folliculorum blepharitis. METHODS: Eighty-six subjects (33 males/36 females) were enrolled in a randomised controlled interventional treatment study. Subjects completed a dry eye symptom questionnaire and were assessed for presence of Demodex folliculorum. Subjects were divided into three groups according to treatment: Dr Organic Tea Tree Face Wash (A) (n=28), OcuSoft Lid Scrub Plus (B) (n=30), or in-house lid scrub with the BlephEx™ device before nightly lid scrubs with OcuSoft Lid Scrub Plus (C) (n=28)...
February 2018: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/29066489/demodex-as-a-delivery-vector-for-topical-targeted-medications-in-the-skin-for-early-melanoma-and-non-melanoma-skin-cancer
#15
Stephen L Strobel
The potential utilization of Demodex mites as delivery vectors for cytotoxic medications directed to early skin cancer is proposed. Potential benefits, proof of concept, and limitations are discussed.
September 2017: Annals of Clinical and Laboratory Science
https://www.readbyqxmd.com/read/29055903/significant-correlation-between-meibomian-gland-dysfunction-and-keratitis-in-young-patients-with-demodex-brevis-infestation
#16
Lingyi Liang, Yan Liu, Xiaohu Ding, Hongmin Ke, Chuan Chen, Scheffer C G Tseng
AIMS: To report the clinical characteristics and correlation between meibomian gland dysfunction (MGD) and keratitis in young patients with ocular demodicosis. METHODS: Observational case series of 60 patients younger than 35 years with ocular demodicosis, of which the diagnosis was based on microscopic counting of Demodex folliculorum and D. brevis of epilated lashes. Severity of keratitis and MGD was graded by photography and meibography, respectively, in a masked fashion...
October 21, 2017: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/29054722/the-eyelids-and-tear-film-in-contact-lens-discomfort
#17
Jaya Sowjanya Siddireddy, Ajay Kumar Vijay, Jacqueline Tan, Mark Willcox
PURPOSE: To investigate characteristics of the eyelid margins, meibomian glands and the tear film of contact lens wearers, and to determine whether these characteristics were related to symptoms of contact lens discomfort. METHODS: A cross sectional study was performed on thirty existing daily wear soft contact lens wearers (6 male; 24 female) with median age of 23 years (range 18-41). Eyelid signs and tear film characteristics were evaluated during a single visit and subjects completed the contact lens and dry eye questionnaire (CLDEQ-8) to evaluate ocular discomfort...
October 17, 2017: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/29035242/the-effect-of-skin-sebum-ph-and-moisture-on-demodex-infestation-in-acne-vulgaris-and-rosacea-patients
#18
Nergiz Turan, Yelda Kapıcıoğlu, Gülbahar Saraç
OBJECTIVE: Acne vulgaris is an inflammatory disease involving the pilosebaceous unit. Rosacea is a chronic inflammatory skin disease that affects the face in particular. This study aimed to determine if skin sebum, pH, and moisture affect the number of Demodex spp. in acne vulgaris and rosacea patients. METHODS: This study focused on 30 patients each with acne vulgaris and rosacea. As a control group, 60 healthy individuals were included. RESULTS: In acne vulgaris patients, when compared to those with Demodex mite more than 5 /cm2 in each area, less than 5/cm2 were found to be oily, acidic, dry or very dry...
September 2017: Türkiye Parazitolojii Dergisi
https://www.readbyqxmd.com/read/29032499/dna-barcoding-for-molecular-identification-of-demodex-based-on-mitochondrial-genes
#19
Li Hu, YuanJun Yang, YaE Zhao, DongLing Niu, Rui Yang, RuiLing Wang, Zhaohui Lu, XiaoQi Li
There has been no widely accepted DNA barcode for species identification of Demodex. In this study, we attempted to solve this issue. First, mitochondrial cox1-5' and 12S gene fragments of Demodex folloculorum, D. brevis, D. canis, and D. caprae were amplified, cloned, and sequenced for the first time; intra/interspecific divergences were computed and phylogenetic trees were reconstructed. Then, divergence frequency distribution plots of those two gene fragments were drawn together with mtDNA cox1-middle region and 16S obtained in previous studies...
December 2017: Parasitology Research
https://www.readbyqxmd.com/read/28945649/short-term-comfort-responses-associated-with-the-use-of-eyelid-cleansing-products-to-manage-demodex-folliculorum
#20
William Ngo, Lyndon Jones, Etty Bitton
PURPOSE: To quantify the discomfort over time of various eyelid cleansers against Demodex. METHODS: This was a prospective, randomized, controlled, crossover, open-label study that enrolled 26 participants. The cleansers used in this study were Biotissue Cliradex (CD), OCuSOFT Lid Scrubs Plus (OP), OCuSOFT OUST Demodex Swabstix (ODS), TheraTears Theralid (TT), NovaBay Avenova (NA). Bausch+Lomb Sensitive Eyes Plus saline was used as a control. Participants were asked to close their eyes as the product was gently rubbed (10 cycles of gentle lateral motion) into the eyelashes...
September 21, 2017: Eye & Contact Lens
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