ÉCOLE NATIONALE VÉTÉRINAIRE D’ALFORT Année 2012 TRAITEMENTS DE LA DERMATITE À MALASSEZIA CHEZ LE CHIEN THÈSE Pour le DOCTORAT VÉTÉRINAIRE Présentée et soutenue publiquement devant Seborrhea oleosa and brownish scales on ventral abdomen of a Cornish Rex cat with Malassezia dermatitis secondary to allergic dermatitis. !����=r����l7���K�ٙ�J�8P i��O���>�S�i�C�A2�}���*���*Sv�L)ˉߨp��.z��Z�V���A��5�� �t��#¿��m_i�lV��?���oN��Vn�7_M�릺���J��=������=�������@���� �:2\H�Ф�����K�G��Yx��ȏ!w�W�ZJ�����܊��t�'xҪ�J�jl�ʹ������3}:��k%�������Ϋ0|�c#���A�Ġ|.ڍ(>����V֟k��`���`�'G�#i%eu��uߨ7'��W��}�->�ًV��x���w�z�{��`?T��� ���}v������h+�{��� �s�zN7�$����A��� ^^\_]>{��_/wj�q���� 7�@����w�Qj%璭>4��~3�5V�Ͷ���e߬�f���e�VKQr��8m�������6�Z]m��ŭQ DERMATITE POR MALASSEZIA SP. P��^��p|PQU>)���3�)'r,�����ݯ_�@o��q�����L��J�JO�Sv��]���� ���G�a�\O�Dy���o�,g�ˉ��s/IX�zQ��z39�_]�yrz=�v�{ {���$�!Ks�g�If���z���͙���ϣ,O�G ����y�}bϏ�0^�a�e�y79Y��r���;m%��V�#\5�ς'lˢY6e��g;�a��6�C^�Ã�'���Y&ybsN�������&������ˋ�O���=��^̟����;������^Ο���?P�FY�#���p]NN�Ұ"8O zq�K���z6qz����8I��M\ӈ�"��R]��n��F�Bk�C%��F�cb�m�(�z���y����&q��"�3���+0$ ���F�R�sY(t���x�,�&_?�,4���4�c�x?�,�6���ֳ)��DIj��yi������ K��V��}J�d>wX�K�¹������23X��ߨV�]9ⓛ|��-6���Vjv�7���ŕ�6�W��O��Wa�謧\)�E���8���M�qga� ! Cette affection de la peau (dermatite) est due à une infection par des levures appelées de leur nom latin: Malassezia pachydermatis. Who's tiny, adorable, and bananas for you? In chronic cases, lichenification and hyperpigmentation also develop. Malassezia dermatitis is an inflammatory condition associated with increased numbers of Malassezia yeasts on the skin that lead to dermatitis and pruritus. Malassezia are commensal yeasts that are part of the normal fungal flora of the skin, ears, oral cavity and body orifices.It is believed to have a symbiotic relationship with commensal staphylococcal organisms; both organisms produce mutually beneficial growth factors and micro-environmental changes. It seems to occur as a consequence of changes in the local microenvironment, such as moist increase, temperature or substrate enhancement, generating a raising on cell quantity, which brings the transition from commensal form to parasitism. Pityrosporum (Malassezia) pachydermatis, que é lipofílica mas não lipidodependente e encontrada na pele da maioria dos animais. Porém, é uma doença completamente diferente. The characteristic “footprint-shaped” yeast can be microscopically identified on cytologic exam of a skin lesion (Fig. For recurrent cases and patients with Malassezia hypersensitivity, a serologic and/or intradermal test may be performed and Malassezia antigen can be used in subcutaneous and sublingual allergen-specific immunotherapy for atopic dogs. <> Acetate tape preparations are ideal for drier lesions. Malassezia (broad-based budding yeasts) and degenerate neutrophils on impression smear cytology from a dog with Malassezia pododermatitis secondary to allergic dermatitis (immersion oil – 100x objective). Ces observations suggèrent que la présence de levures Malassezia à l’examen histopathologique de lésions multifocales ou généralisées doit s’accom- pagner d’une recherche approfondie de tumeur interne. 5 0 obj Topical medication is important in cases with an incomplete or poor response to systemic treatment because of biofilm formation, and is also preferred in cases of yeast pododermatitis. In dogs, Malassezia dermatitis is frequently associated with allergic dermatitis (e.g., environmental allergy, adverse food reaction, flea bite hypersensitivity); endocrinopathies, especially hypothyroidism; and other seborrheic conditions. x��YMs���ﯘ�c�j����%J� Life After Death Experience (NDE) with Steve Gardipee, Vietnam War Story | One of the Best NDEs - Duration: 16:38. The skin of most if not all warm-blooded … %PDF-1.4 This is called malassezia or yeast dermatitis. Options just for dogs include selenium sulfide 1% to 2.5% and terbinafine. Malassezia pachydermatis é considerada um habitante normal da microbiota cutânea e ocasionalmente pode se tornar patógena oportunista do meato acústico externo de cães e gatos. Malassezia is not considered a common pathogen in cats. obtained dispersive results from <0.03 to >16 µg/mL. Malassezia yeasts have been found in human dandruff, deep-sea vents, and pretty much everywhere in between. On connaît actuellement jusqu'à 11 espèces différentes, dont le responsable de la dite dermatite chez le chien ou le Malassezia pachydermatis. Malassezia pachydermatis is a fungus that is frequently found on the skin and in the mucosa, and ear canals and of dogs. et une démodécie cutanée. Pruritus can be present. 1, 2). In small numbers, it is asymptomatic, but the fungus can take advantage of a weakened immune system or another disease to multiply and cause an opportunistic infection. 2010, Gaitanis et al. Taxonomia . Malassezia pachydermatis is recognized as a normal inhabitant and an opportunistic pathogen of the external ear canal and skin of dogs and cats. Malassezia pachydermatis : tingida de cor escura No cão, M. pachydermatis pode ser encontrada na pele, ouvidos, sacos anais, vagina e reto. Técnicas de diagnóstico . Esta It is a commensal organism in the dog, residing on or in the skin, ear … In dogs, Malassezia dermatitis lesions can be localized or generalized. Yeasts of the genus Malassezia serve as both commensal microorganisms and pathogens on the skin of humans and domestic animals. Hypotrichosis and erythema of ventral neck and thorax of a Basset Hound with Malassezia dermatitis secondary to allergic dermatitis. Nomeadamente, M. sympodialis, M. globosa, M. furfur e M. nana.Porém, sem dúvida que a espécie mais comum a causar problemas nos gatos é a Mallasezia pachydermatis.. Ao contrário da malassezia em cachorros, a malassezia em gatos é muito menos frequente. Acetate tape preparations are ideal for drier lesions. EM UM CÃO RELACIONADA COM O ESTRESSE: RELATO DE CASO FERREIRA, Manoela Maria Gomes AVANTE, Michelle Lopes ROSA, Bruna Regina Teixeira da MARTIN, Irana Silva FILHO, Darcio Zangirolami Acadêmicos da Faculdade de Medicina Veterinária e Zootecnia da FAMED – Garça e-mail: manuferreira2000@yahoo.com.br Brown discoloration of the adjacent claw and/or interdigital hair is often observed in cases of Malassezia paronychia (Fig. Prognosis is variable if the underlying cause of Malassezia dermatitis is not identified and/or managed successfully. g��_5.� The yeast dermatitis in cats is characterized by seborrhea oleosa, erythema, hypotrichosis, and the accumulation of greasy, adherent, brownish scales (Fig. Clinical signs are well recognised and diagnostic approaches are well developed. A Malasseziose é uma doença de pele causada pelo fungo Malassezia pachydermatis sp., um tipo de levedura comensal encontrada na flora tecidual dos animais, que normalmente não traz benefícios ou prejuízos para o organismo do animal.. Mas que ainda assim, pode ser responsável pela maioria das otites caninas.. As leveduras do gênero Malassezia são … Conheça os sintomas e o tratamento. Figure 4. Figure 2. Both swabs and acetate tape preparations are useful for body sites that are difficult to sample, such as skin folds and interdigital spaces. Predisposition is reported in the basset hound, West Highland white terrier, dachshund, American cocker spaniel, English springer spaniel, and German shepherd dog, possibly because they have significantly more yeast on their skin (Matuosek and Campbell, 2002). ������#-���nq��|���`�e��ݣ#m��B���W���Á�RQ�`,� Quando o ambiente em que o fungo vive é alterado, isso propicia seu crescimento. Predisposing factors for Malassezia proliferation and pathogenicity include increased environmental humidity and temperature, skin trauma, sebum quantity and quality, immune dysfunction, and genetic predispositions. Le genre Malassezia Il a été initialement décrit vers 1874 comme un champignon assez particulier, à la fois en morphologie et en style de vie. BACKGROUND: Malassezia species are lipophilic yeasts that are emerging as nosocomial pathogens, particularly in low-birth-weight neonates who receive lipid emulsions. Some patients with Malassezia hypersensitivity can experience significant pruritus and erythema from a relatively small number of yeasts. Malassezia pachydermatis forma colônias foscas com aspecto cremoso e textura macia ou friável. White, P. Bourdeau, P. Blumstein, Comparison via cytology and culture of carriage of Malassezia pachydermatis in atopic and healthy dogs Proceedings of the Third World Congress of Veterinary Dermatology Edinburgh (1996) 37- * Veterinary Hospital University of Pennsylvania 3850 Spruce Street Philadelphia, PA 19104 Dermatitis and otitis caused by the yeast Malassezia pachydermatis … Malassezia pachydermatis, a non-obligatory lipophilic yeast, has occasionally been implicated in nosocomial fungaemias. ӱb��4�|\ �}�qn:]�>�t G�4�g-X1����1�L)�NC�8s03H�mIc�i�8�\V~�����(x���be���8L��eF�ة��������x��$�/'�Jc��O؆b.�?��c��y����NJ������. Esses “bichinhos” adoram gordura e a têm como fonte de energia. Generalized Malassezia spp. Figure 1. The aim of the study was the characterization of Malassezia pachydermatis and its pigment-producing subgroup using biochemical tests and RAPD. Malassezia yeasts have also been associated with cases of facial dermatitis in Persian cats and chin acne. La dermatite à Malassezia chez le chien est une maladie de peau fréquente due à une levure : Malassezia pachydermatis (parfois appelée Pityrosporum folliculorum chez l’homme).. Certaines régions sont plus touchées comme : le conduit auditif, les plis, les babines, les espaces interdigités et la base des griffes, la face ventrale de l’abdomen…. Sphynx and Devon Rex appear predisposed to Malassezia carriage, and often have a greasy exudate on the claws and in the claw folds. Sprays, creams, lotions, or wipes are typically applied every 12 to 24 hours. They are typically characterized by erythema, scaling, and/or greasy exudation. Les signes cliniques sont bien reconnus et … Pitiríase versicolor . In dogs that suffer from other skin conditions, for example flea allergy dermatitis, food allergies, atopy (allergy to air born antigens) or hormonal upsets, malasezzia organisms can overgrow and cause inflamed oily scaly itchy skin and ears often with a characteristic pungent odour. O que é Malassezia? Note: 2012, Arendrup et al. The characteristic “footprint-shaped” yeast can be microscopically identified on cytologic exam of a skin lesion (Fig. Malassezia (broad-based budding yeasts) on acetate tape cytology from a dog with Malassezia pododermatitis secondary to allergic dermatitis (immersion oil – 100x objective). Elle entraîne de forte démangeaison (prurit). Sample collection technique is based on the location and type of skin lesions. In especial clinical conditions, and mainly in the cases of therapeutic failure related to external otitis and dermatitis complicated by this yeast, it is recommended test susceptibility to antifungal drugs. Sample collection technique is based on the location and type of skin lesions. �䋩cp�s�!�������}}A�Ro�Hzk�M�a� 3C\��X�0fR��������3�F�j�oL�����< Happy Valentine's Day from #IllinoisVetMed … https://t.co/8GqUpht89w9:35 AM Feb 14th, 3505 Veterinary Medicine Basic Sciences Building The leaven Malassezia pachydermatis is an organism of major importance in Veterinary Medicine, present in the ear, ear cavity and in the skin of the dogs. II. And so are we! Figure 5. Duke is! Malassezia spp. A malassezia (o nome técnico é malasseziose), que também afeta os seres humanos, é muito comum em cães, mesmo em boas condições de saúde. La levure non-lipodépendante M. pachydermatis est l’espèce habituellement retrouvée sur la peau des carnivores domestiques. Este problema é muitas vezes confundido com sarna e alergias, já que apresenta sinais clínicos semelhantes. M. pachydermatis is known to cause external otitis in dogs. For microscopic evaluation of the sample, utilize low power magnification to first identify cellular areas and then switch to oil immersion to identify and quantify the yeasts. For both dogs and cats, these include topical azoles (e.g., miconazole, ketoconazole, clotrimazole, and climbazole), chlorhexidine preferentially in combination with azole agents for synergistic activity. Malassezia dermatitis in dogs and cats has evolved from a disease of obscurity and controversy on its existence, to now being a routine diagnosis in general veterinary practice. Na micromorfologia são observadas células ovais pequenas, a temperatura ideal para o seu desenvolvimento é de 37°C, com máximas de 40°C ou 41°C. unitermos : resumo : Malassezia. are commensal organisms, but if yeasts are identified on cytology from suggestive lesions, the infection should be addressed and treated. In cats, Malassezia dermatitis has been associated with retroviral infections (i.e., feline immunodeficiency virus, feline leukemia virus), diabetes mellitus, neoplasia, and paraneoplastic syndromes. stream In dogs that suffer from other skin conditions, for example flea allergy dermatitis, food allergies, atopy (allergy to air born antigens) or hormonal upsets, malasezzia organisms can overgrow and cause inflamed oily scaly itchy skin and ears often with a characteristic pungent odour. Fungaemia due to lipid-dependent Malassezia species usually occurs in patients with central line catheters receiving lipid replacement therapy, especially in infants (Tragiannides et al. Topical therapy can be used as the sole treatment for focal or generalized Malassezia dermatitis. Against ANB, the MIC Shampoos are typically applied once to twice weekly. A Malassezia é uma levedura comensal, ou seja, que vive naturalmente na pele do cachorro, mas em certos casos se prolifera de maneira exagerada provocando uma dermatite. Malassezia pachydermatis é uma levedura pertencente à microbiota normal de animais e, usualmente, apontada como responsável por otites externas e recentemente por diversas formas de dermatites, principalmente em cães. A malassezia é uma infecção causada pelo fungo Malassezia pachydermatis, encontrado comumente na pele e nas orelhas de cães e gatos. Home / News / Malassezia Dermatitis in Dogs and Cats. Existem vários fungos do gênero Malassezia que já foram isolados na pele, mucosa e canais auditivos dos gatos. Malassezia pachydermatis is a type of yeast that is commonly found on certain areas of the skin in dogs and cats. Malassezia pachydermatis (Pityrosporum pachydermatis, P. canis) is a lipophilic, non-mycelial yeast with characteristic thick-walled elongated oval shape and unipolar budding. Malassezia pachydermatis: É a única espécie a crescer em meio agar Sabouraud sem suplementação lipídica. Malassezia é fungo de pele. Malassezia pachydermatisfoi a única espécie fúngica encontrada no meato acústico externo, sendo mais comum em felinos machos que em fêmeas (machos 56,25%, fêmeas 28,41%; p<0,05). tW�-��t��=��VtG��;��-B�}�(���nl�`�(�����h�#) ����S-�'bT'�W�? Paronychia (nail fold inflammation) may occur alone or in combination with more generalized pododermatitis. pachydermatis obtained MIC range <0,03 a 2 µg/mL, therefore the lipid-dependents strains of Malassezia spp. Un chat présentait à la fois des Malassezia spp. Etiologie: Malassezia est considérée comme un organisme normal présent sur la peau. Brown discoloration of claws due to Malassezia paronychia. Various antifungal agents are marketed for the treatment of yeast skin infections. Impression smears or swabs can be used for greasy lesions. Malassezia pachydermatis é o fungo responsável pela maioria das otites caninas. 6). Portal de informações acadêmicas da Universidade Federal de Santa Maria (UFSM) Les levures Malassezia sont reconnues comme des agents pathogènes opportunistes qui peuvent profiter de conditions de développement favorables pour proliférer. When Malassezia dermatitis is present in cats, consider an underlying cutaneous or systemic disease, such as allergies, endocrine and metabolic diseases, neoplasia, and infection with FeLV or FIV. Pruritus is often present and may lead to traumatic alopecia and excoriations. Impression smears or swabs can be used for greasy lesions. The Malassezia pachydermatis (Pityrosporum canis) is found in the whole skin microflora. -Chat atteint de rétroviroses -Création de conditions favorables pour la pullulation des Malassezia (humidité, chaleur, état séborrhéique) Par modifications de l’écosystème cutané et diminution des défenses immunitaires locales ou générales : Overall prognosis for Malassezia dermatitis is good. Malassezia Pachydermatis est une levure, non contagieuse, qui se retrouve préférentiellement au niveau des babines, des espaces interdigités, sur les membres, le thorax, l’abdomen, et les régions vaginales et anales. Malassezia pachydermatis is a commensal yeast that may overcolonize the skin of dogs. Malassezia pachydermatis is a fungus that is frequently found on the skin and in the mucosa, and ear canals and of dogs. Alopecia and hyperpigmentation involving axillae and ventral thorax of a Golden Retriever with Malassezia dermatitis secondary to allergic dermatitis. A malassezia é um fungo existente na pele que em grandes quantidades vira uma doença. dermatitis in cats is usually associated with a systemic disease (e.g., metabolic disease, neoplasia) and is considered a serious finding. Malassezia pachydermatis is a yeast that is commonly found on certain areas of the skin of healthy dogs. Dustin Warncke Recommended for you Alopecia, erythema, edema and salivary staining of front paws of an allergic Poodle mix with Malassezia pododermatitis. The most common species found on dogs and cats is Malassezia pachydermatis, and this is commonly found on the skin, in the ear canals and on the mucosal surfaces (oral, anal, vaginal). In small numbers, it is asymptomatic, but the fungus can take advantage of a weakened immune system or another disease to multiply and cause an opportunistic infection. Its presence is normally not a cause for alarm; however, in some cases, Malassezia can reproduce in abnormally large numbers and cause disease. Em meados da década de 1990, cientistas do Instituto Pasteur em Paris, descobriram espécies adicionais. It was of interest to determine whether particular RAPD patterns could be used to indicate pigment production, as well as a close genetic relatedness to Malassezia furfur. Malassezia immunotherapy is not a replacement for topical or systemic antifungal therapies for the management of active Malassezia dermatitis. Zoonotic transfer has been documented from dogs to immunocompromised patients by healthcare workers who own dogs. It contributes for the external otitis, and its pathogenicity was proven when this fungi or its fluids were isolated from the external acoustic meato. However, when numbers multiply, inflammation of the skin can result in dermatitis. The diagnosis of Malasseziadermatitis is based on supportive clinical signs and cytology. When a cluster of patients with Malassezia pachydermatis infection was identified in … 2014). It may be considered in allergic patients with recurrent pruritic Malassezia dermatitis to reduce or prevent recurrences of Malassezia-associated dermatitis and pruritus. Figure 6. https://www.petmd.com/cat/conditions/skin/c_ct_malassezia_dermatitis 2001 S Lincoln Ave. | Urbana, IL 61802, Your gifts support scholarships and animals in need, ©2021 University of Illinois College of Veterinary Medicine, Department of Veterinary Clinical Medicine, Medical District Veterinary Clinic at Illinois, Accreditation information for applicants and students. Malassezia pachydermatis is a yeast that is commonly found on certain areas of the skin of healthy dogs. A origem da dermatite por malassezia é o conhecido fungo malassezia pachydermatis, conhecido como levedura zoofilicada, da divisão de basidiomycota. S.D. Les otites et dermatites à Mallassezia sont fréquentes chez le chien mais rare chez le chat. Most dogs with this infection have patches of itchy, flaky or crusted skin. É considerado como patógeno secundário em patologias de pele e otites externas em caninos e felinos, como por exemplo doenças alérgicas de pele, seborréias e doenças inflamatórias de pele crônicas ou recorrentes. Although rare, cases of life-threatening fungemia in people have been attributed to Malassezia pachydermatis, for which dogs are a natural host. Both swabs and acetate tape preparations … La dermatite à Malassezia chez le chien et le chat a évolué d’une maladie obscure et controversée sur son existence même, à désormais une maladie diagnostiquée en routine en pratique vétérinaire générale. )kS� V5]�ʞ~YJ�_j�$��0]������1Ѩ[�_o�J�'��c�Z�(�Mq�n��]�Z���X�����0������ C�ݶ�ڮ��û��߀8;+�۲o��x�Q�4ڠ1�� ��Qs�����n��Wb C4��5GtP�/w�2��0ą�^> 9 ����f��l�]�,�؎{sVA�����1˖�C&��� O��$�1$zrK4�T0檥�Ӳ'��f-��J5��*���m�!�&��? The diagnosis of Malassezia dermatitis is based on supportive clinical signs and cytology. For the vast majority of animals, these yeast organisms cause no harm. 3-5). Apresenta assimilação positiva aos Tween 40 e 60, fraca ou positiva ao Tween 80 e pode ou não assimilar o Tween 20. %�쏢 [�mѲV��i�Q)���,�6�5���fg�7=��q1�d��ad��7�CqT����?+�]�����b�8'N�y8�0����'�����ந��J��e��\�*\�q����T�l�M邺সiE���$t��ɻe��R�d����G�`9�S�jPg��#�&H#qc$�A/0|M�C/x��$3�c�ώ8����.�Mc>��Q�HSL����)���`��z~��9�ڎ������1n�Ý�=N�y��L�.�8?�����l��U}J��#\����@�+�xB̲�l9�� hL���6�V]���7=�H�H9�ö� 1, 2). ?d.�J\���]$X� The fungus flourishes in c… Este trabalho teve como objetivo pesquisar a presença de M. pachydermatis em otite externa canina. O desenvolvimento da malassezia ocorre devido ao crescimento anormal dos fungos, causando essa dermatite e inflamação da pele. Malasseziaque terão suas características fisiológicas descritas a seguir. A pro- porção de isolamento foi semelhante entre felinos hígidos ou com lesões (dermatopatas ou otopatas). ABOVE: Figure 3.
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