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ABSTRACT: Cutaneous adverse drug reactions (CADR) are unexpected dermatological reactions caused by medications. CADRs may mimic any type of dermatosis, including contact dermatitis (CD). This paper described a case of a CADR resulting from the topical use of benzyl benzoate in a dog. A two year old unneutered male Pit Bull was referred for a medical consultation due to skin lesions in the cervical region. The owner reported bathing this dog routinely using 10% benzyl benzoate (BB)-based scabicidal soap, without rinsing it off at the end. An ulcerative, draining maculopapular skin lesion was observed in the dorsal region of the neck extending to the interscapular region. A surgical skin biopsy was then performed and microscopically an area of ulcerated epidermis was observed with apoptosis of transepidermal keratinocytes associated with a mixed infiltrate. Interface dermatitis with a predominance of lymphocytes in the hair follicle region, multifocal areas of mild spongiosis, mild vacuolar degeneration of keratinocytes and sub-corneal pustule was also identified. Bathing with the BB-based scabicidal soap was discontinued and a new shampoo was introduced. Topical dexamethasone, neomycin sulfate, bacitracin zinc, griseofulvin, and benzocaine treatment was started. Within 48 hours of treatment, skin revitalization was already significant and total healing took place approximately three weeks after the first appointment. Considering the findings observed in this case, it can be concluded that prolonged topical exposure to BB, due to misuse of the product, may cause a CADR characterized by irritant CD in dogs.

ABSTRACT: The study describes the genetic identification, clinical, and epidemiological characteristics of an outbreak of equine infectious anemia occurring in the state of Rio Grande do Sul, Brazil. Three animals kept in the periurban region of Uruguaiana city tested positive for the AGID test. The serology was performed as a requirement for transit. None of the animals showed clinical signs of infection, one animal was necropsied, and the others were stolen. In the post-mortem examination, no macroscopic changes were observed, and microscopically, discrete hemosiderosis was detected in fragments of the liver and spleen. Amplifying and sequencing a proviral DNA fragment in blood, spleen, and mesenteric lymph node samples confirmed EIAV infection. Phylogenetic analysis of the first sequenced EIAV sample from the Rio Grande do Sul State indicates a high similarity with other Brazilian samples. Results confirmed the viral presence in the state’s herds and described epidemiological and virological characteristics of EIA that contribute to the maintenance and dissemination of the virus in herds.

ABSTRACT. Quevedo L.S., Silveira C.S., Schreiner T., Diefenbach A. & Anjos B.L. [Outbreak of ruminal acidosis in semi-extensive breeding beef cattle production - Case report.] Surto de acidose ruminal em criação semiextensiva de bovinos de corte - Relato de caso. Revista Brasileira de Medicina Veterinária, 37(3):269-274, 2015. Curso de Medicina Veterinária, Universidade Federal do Pampa, Campus Uruguaiana, BR 472, Km 592, Caixa Postal 118, Uruguaiana, RS 97500-970, Brasil. E-mail: bruno.leite@pq.cnpq.br The ruminal acidosis is a metabolic imbalance responsible for high mortality of cattle which occurs by excessive carbohydrate intake. This work describes the epidemiologic and clinicopathological findings of an outbreak of ruminal lactic acidosis in cattle. The outbreak occurred in a farm in São Borja, Rio Grande do Sul, Brazil, affecting Braford cattle on semi-extensive breeding system. From 170 bovines, with about two years old 14, showed signs of ruminal lactic acidosis. Eight of them presented staggering gait, depression, bristling hair, dark diarrhea and ruminal atony, esternal recumbency and death. The cattle were fed native pasture, common salt and water ad libitum. About 15 days before of first death has been started a supplementation with rice grains and sorghum grass silage. The disease was classified as acute form for the eight cattle. In this report the supply of rice was limited to a few feeders for the whole lot and at higher levels than recommended for semi-extensive production, allowing greater intake by cattle dominant. The disease was controlled with adequacy of the feeding management, with no rice for feeding until total recovery of animals.

ABSTRACT: Protozoal diseases caused by species of Sarcocystis can cause serious damage in sheep flocks, inducing decreased growth conversion rates and partial or complete loss of carcasses at the slaughterhouse. This article describes an outbreak of Sarcocystis gigantea infection in sheep slaughtered in a farm in Rio Grande do Sul State, Brazil. Between July and September 2013, three sheep showed multiple nodules in the esophagus that were microscopically characterized as encapsulated cysts filled with elongated, basophilic, nucleated structures morphologically consistent with S. gigantea bradyzoites. Diagnosis was made based on the epidemiological, macroscopic, and microscopic findings. This is the first report of this infection in sheep in Rio Grande do Sul and should be recognized by veterinarians, especially during meat inspection.