Prevalence study of SNP c.421G>T in the ADAMTS2 gene responsible for dermatosparaxis in white dorper sheep in Brazil / Prevalência do SNP c.421G>T no gene ADAMTS2 responsável pela dermatosparaxia em ovinos white dorper no Brasil

Dermatosparaxis is an autosomal recessive disorder of connective tissue; the disorder is clinically characterized by skin fragility and hyperextensibility. Dermatosparaxis in White Dorper sheep is caused by a single nucleotide polymorphism (SNP) (c.421G>T) in the ADAM metalloproteinase with thrombospondin type 1 motif, 2 (ADAMTS2) gene. The aim of this study was to investigate the prevalence of this SNP in a White Dorper herd in São Paulo state, Brazil. In this study, we collected blood DNA samples from 303 White Dorper sheep and performed polymerase chain reaction to amplify the SNP region. The samples were sequenced to determine the presence of the SNP in the ADAMTS2 gene. The SNP prevalence in the studied population was 15.5%; this finding indicates that more effective control measures should be used to prevent the inheritance of SNP c.421G>T in the ADAMTS2 gene in Brazilian White Dorper herds.

A dermatosparaxia é uma doença autossômica recessiva do tecido conjuntivo, clinicamente caracaterizada pela fragilidade e hiperextensibilidade da pele. A dermatosparaxia em ovinos White Dorper é causada pelo polimorfismo de base única (SNP) c.421G>T no gene ADAM metalopeptidase com trombospondina tipo 1 motif, 2 (ADAMTS2). O objetivo deste estudo foi investigar a prevalência deste SNP em ovinos White Dorper no estado de São Paulo, Brasil. Foram coletadas amostras de sangue de 303 ovinos White Dorper. O DNA foi purificado destas amostras sanguíneas e utilizado em uma reação em cadeia da polimerase (PCR) para amplificação da região do gene contendo SNP c.421G>T. Os produtos das PCR foram sequenciados para determinar o genótipo dos animais. A prevalência do SNP na população estudada foi de 15,5%, estes achados indicam que medidas de controle efetivas devem ser utilizadas para prevenir a disseminação deste SNP no rebanho brasileiro de White Dorper.

Dermatofilose em ovinos da raça Santa Inês no Distrito Federal / Dermatophylosis in Santa Inês sheep from Distrito Federal

Relataram-se quatro casos de dermatofilose em ovinos da raça Santa Inês, no período de um ano. Microscopicamente observaram-se filamentos na forma de "trilho de bonde" e zoósporos nos quatro casos. A tentativa do isolamento do microrganismo foi realizada por meio do método de Haalstra e em apenas um caso obteve-se sucesso, observando-se colônias de aparência lisa, formato circular, cor amarelada e hemolítica em ágar sangue. O exame direto com coloração de Gram mostrou-se um método bastante eficiente na confirmação da presença do microrganismo afetando a epiderme em razão da morfologia típica do agente.

Four cases of dermatophylosis were reported in Santa Inês sheep in a study period of one year. Microscopically, septate filaments and coccoid forms zoospores were observed. Attempts to isolate the microorganisms were accomplished using Haastra's method and it was successful in only one case. Dermatophilus congolensis samples have grown on blood agar, colonies where hemolytic, small, round and pigmentation vary from yellow to orange. The gram staining method was efficient to confirm the presence of the microorganism affecting the epidermis due to typical morphology of the agent.

Lesões traumáticas de pele causadas pelos espinhos de Mimosa pudica e Mimosa debilis em equídeos / Traumatic skin injuries caused by the thorns of Mimosa pudica and Mimosa debilis in Equidae

Foram realizadas pesquisas sobre a natureza e causa de lesões de pele em equídeos em uma propriedade no município de Castanhal, região Nordeste do Estado do Pará. Foram realizadas visitas técnicas, estudos epidemiológicos, coletas de sangue, biópsias de pele afetada e a inspeção da pastagem. O estudo incluiu 25 equídeos, dos quais 14 machos e 11 fêmeas, de seis meses e oito anos de idade. Os animais apresentaram lesões ulcerativas, de bordos irregulares, na cabeça (narinas, focinho, lábios superiores e inferiores e chanfro), na cavidade oral (vestíbulo bucal e gengiva) e nos membros (boletos, metacarpos e metatarsos e articulação escápulo-umeral). No exame histopatológico foram observados focos de erosões cutâneas, caracterizados por perda e necrose da epiderme, com espongiose, degeneração vesicular da epiderme remanescente e leve infiltrado inflamatório na derme subjacente, constituído predominantemente por macrófagos e, em menor grau, eosinófilos. Na inspeção da pastagem, constituída de Brachiaria humidicola, foi constatada grande invasão de duas plantas providas de espinhos, Mimosa pudica e Mimosa debilis, ambas da família Leg. Mimosoideae. Concluiu-se, que as lesões de pele foram causadas pela ação traumática dos espinhos de Mimosa pudica e Mimosa debilis.(AU)

Studies on the nature and cause of skin lesions in horses on a farm in the county of Castanhal, northeastern Para, Brazil were conducted. These were visits to the farm, epidemiological studies, blood sample collections, skin biopsies, and inspection of the pasture. The study included 25 Equidae, 14 males and 11 females, six months to eight years old. The animals showed ulcerative lesions of irregular borders on the head (nose, muzzle, upper and lower lips), in the oral cavity (buccal vestibule and gum) and on the limbs (billets, metacarpals and metatarsals and scapular-humeral joint). The histopathological examination revealed foci of cutaneous erosions with epidermal necrosis, spongiosis and vesicular degeneration of the remaining epidermis, and mild inflammatory infiltrate in the underlying dermis, consisting predominantly of macrophages and, to a lesser degree, eosinophils. The inspection of the pasture, which consisted of Brachiaria humidicola, revealed a heavy invasion by two plants provided with spines, Mimosa pudica and Mimosa debilis, of the Leguminosae Mimosoideae family. It was concluded that the skin lesions were caused by traumatic action of the spines of Mimosa pudica and Mimosa debilis.(AU)

Clinical and Surgical Survey on most common skin affections in police guard and explosive dogs

Medicinal and surgical skin affections are common health problems in police guard and explosive dogs used for protection of organizations of high economic importance and tourism in Egypt. The present study was aimed to calculate the percentage of skin affections and to evaluate the degree of success for routine management of these problems. The study was performed on 156 working dogs where allergic conditions were represented by 7.7% with main complaint of severe pruritus. These conditions were constituted of flea allergic dermatitis [0.6%], contact allergic dermatitis [1.1%], food allergy [4.1%], atopy [1.7%] and urticaria wheals after penicillin injection [0.24%]. Surgical wounds shared with 14.3% and abscesses were represented by 0.35%. Insects [fleas] were represented by 0.6%, while acarides were represented by 24.4% which contained ticks [23.7%], sarcoptic mange [0.6%] with complaint of intense pruritus, and demodectic mange [0.12%]. Fungal infection was represented by 0.35%. Ear affections included otitis externa [12.4%] and ear hematoma [2.9%]. Pyoderma was represented by 20.3% which included surface pyoderma [18.3%], superficial pyoderma [1.72%] and deep pyoderma [0.24%]. Tail arrada was represented by 1.5%. Scrotal affections were represented by 6.1%. Anal sacculitis was represented by 7%. Internal worms which induced bisymmetrical alopecia [5 cases of Dipylidium caninum, 6 cases of Toxocara canis in puppies, 3 cases of Toxascaris leonina in puppies] were represented by 1.7%. There were also reported 0.48% superficial swellings. The routine work was satisfactory in most cases except recurrent cases of pyoderma to which we recommended the use of alternative therapy