Immunopathological findings in a cat with auricular chondritis

At clinical examination, a 5-year-old male domestic short-haired cat exhibited painful swelling and erythema of the pinnae of both ears. Microscopically, the lesions on both pinnae were composed of diffuse granulomatous chondritis with degeneration and necrosis of the pinnal cartilage. Numerous mast cells were also observed within and surrounding the inflammatory lesion. Immunohistochemistry showed a mixed inflammatory infiltrate characterised by the predominance of macrophages (CD68+, MAC 387+ and Lysozyme+), T lymphocytes (CD3+), some B lymphocytes (CD79α+) and neutrophils. Immunopathological characterisation of the lesion showed a granulomatous inflammation profile and suggests that the morphological changes and immunopathogenesis of auricular chondritis in cats presents a similarity with relapsing polychondritis in humans

Domestic dog attacks on livestock referred to a Veterinary Teaching Hospital

Losses and the economic impact of dog attacks (DAs) on livestock are often overlooked and include factors such as decreased production, expenses for treatment and handling, and death of injured animals. This study evaluated the epidemiological, therapeutic, and pathological findings of DAs on livestock over an 11-year survey using the records of farm animals referred to a Veterinary Teaching Hospital. Livestock attacked by dogs included 31 sheep, 11 horses, 3 cattle, 3 goats, and 2 pigs, totaling 50 animals. Anatomical locations injured by dog bites were identified as head/neck, thoracic/pelvic limbs, abdomen/flank, rump/tail, and multiple affected regions (two or more bite sites). Additionally, the severity of the injuries was classified into four degrees adapted from the classification of dog bite injuries in children. Most livestock presented Grade 1 (26%) and Grade 2 (28%) injuries, while Grade 3 and Grade 4 injuries were observed in 46% of DAs. Furthermore, 35 animals (70%) were discharged, 9 (18%) died, and 6 (12%) were humanely euthanized. DAs may represent a significant cause for referring livestock species to clinical care, severe injuries, and a considerable number of deaths. In this study, we provide information regarding DAs on livestock for the first time in Midwestern Brazil

O paradoxo dos benzodiazepínicos: uma avaliação neurobiológica das consequências do uso e abuso na saúde física e mental

O uso indiscriminado de benzodiazepínicos tem sido objeto de preocupação devido suas consequências na saúde física e mental. Este artigo buscou avaliar neurobiologicamente os impactos dessas substâncias, conhecidas por modular a neurotransmissão gabaérgica, e confrontar as ideias centrais dos estudos disponíveis na atualidade. A ação dos benzodiazepínicos no sistema nervoso central promove efeitos ansiolíticos, sedativos, hipnóticos e relaxantes musculares, resultando em alívio imediato de sintomas como ansiedade e insônia. No entanto, o uso crônico dessas substâncias está associado a diversas consequências negativas. O comprometimento cognitivo é um dos principais impactos observados, incluindo déficits de memória e atenção. Além disso, o uso prolongado de benzodiazepínicos pode levar à queda da função hepática, aumentando o risco de lesões no fígado. O risco de quedas e fraturas também é elevado, principalmente em idosos, devido aos efeitos sedativos e relaxantes musculares dessas substâncias. O desenvolvimento de dependência e a síndrome de abstinência são preocupações adicionais, exigindo uma descontinuação gradual e monitoramento cuidadoso. Esta revisão de literatura abordou estudos que reforçam essas preocupações, destacando a importância de uma abordagem individualizada na prescrição de benzodiazepínicos. Profissionais de saúde devem considerar os riscos e benefícios, promovendo estratégias não farmacológicas para o manejo da ansiedade e insônia. No contexto brasileiro e mundial, é essencial conscientizar os pacientes sobre os potenciais riscos associados ao uso prolongado dessas substâncias. Alternativas terapêuticas estão sendo investigadas, visando minimizar os efeitos colaterais e oferecer opções mais seguras e eficazes. Em conclusão, o uso e abuso de benzodiazepínicos apresenta um paradoxo entre os benefícios terapêuticos imediatos e os riscos a longo prazo. Profissionais de saúde desempenham um papel fundamental na prescrição responsável dessas substâncias, garantindo o uso adequado e promovendo estratégias alternativas para o cuidado da saúde mental e física dos pacientes

Euritrematose pancreática em pequenos ruminantes no Distrito Federal

Dissertação (mestrado)—Universidade de Brasília, Faculdade de Agronomia e Medicina Veterinária, 2021.Eurytrematose pancreática (PE) é uma parasitose indeterminada ou negligenciada em caprinos e ovinos nas Américas. As características clínicas e patológicas da EP não são bem determinadas em pequenos ruminantes em todo o mundo. Casos naturais de PE em pequenos ruminantes foram detectados no Distrito Federal, Brasil, e foi realizado um levantamento dos registros de necropsia em caprinos e ovinos. Dados epidemiológicos e clínico-patológicos foram recuperados, e a identificação morfológica e molecular de vermes também foi estabelecida. A maioria dos casos de PE ocorreu no período chuvoso em fêmeas adultas, com incidência de 12,9% em caprinos e 0,8% em ovinos. Os sinais clínicos variaram de infecções assintomáticas a anorexia, letargia, fraqueza, perda de peso acentuada e morte em algumas cabras. Grosseiramente, a maioria dos casos de PE em cabras e ovelhas foram achados de necropsia incidental com lesões pancreáticas menores. Em contraste, três cabras apresentaram pancreatite crônica, dilatação dos principais ductos pancreáticos com numerosos trematódeos e necrose de gordura abdominal marcada. Identificação morfológica e molecular de vermes detectados em Eurytrema coelomaticum. Nossos achados sugerem a relevância das infecções por E. coelomaticum em pequenos ruminantes da região e mostram a possibilidade de casos graves e letais em caprinos. O PE deve ser investigado em regiões relevantes de produção de pequenos ruminantes nas Américas.Pancreatic eurytrematosis (PE) is an undetermined or neglected parasitosis in goats and sheep in the Americas. Clinical and pathological features of PE is not well determined in small ruminants worldwide. Natural cases of PE in small ruminants were detected in the Federal District, Brazil, and a survey of necropsy records in goats and sheep was conducted. Epidemiological and clinicopathological data were retrieved, and morphological and molecular identification of flukes were also established. Most cases of PE occurred in the rainy season in adult females, with an incidence of 12.9% in goats and 0.8% in sheep. Clinical signs varied from asymptomatic infections to anorexia, lethargy, weakness, marked weight loss, and death in some goats. Grossly, most cases of PE in goats and sheep were incidental necropsy findings with minor pancreatic lesions. In contrast, three goats showed chronic pancreatitis, dilation of major pancreatic ducts with numerous trematodes, and marked abdominal fat necrosis. Morphological and molecular identification of flukes detected Eurytrema coelomaticum. Our findings suggest the relevance of E. coelomaticum infections in small ruminants in the region and show the possibility of severe and lethal cases in goats. PE must be investigated in relevant regions of small ruminants production in the Americas

Therapeutic Effects of <i>Zymomonas mobilis</i> on Experimental DSS-Induced Colitis Mouse Model

Zymomonas mobilis, a Gram-negative bacteria observed in some popular beverages, is considered safe and has been studied for its potential therapeutic benefits. In this study, we explored its effects on the inflammatory process, tissue integrity, differential gene expression, and microbiota composition in an experimental dextran sulfate sodium (DSS)-induced colitis model in mice. As a result, Z. mobilis alleviated the symptoms caused by DSS administration, as indicated by reduced weight loss, disease activity index, a significant reduction in the colon weight/length ratio, and histopathological improvement. Also, Z. mobilis could restore the mucosal barrier as well as increase the expression of Muc3 and Ocln genes. An analysis of 16S rRNA sequences showed that Z. mobilis alters gut microbiota, increasing Akkermansia muciniphila abundance and decreasing Escherichia coli. Furthermore, Z. mobilis seems to be involved in potentiating a regulatory phenotype by inducing immunomodulatory genes like Tgfb, Il5, Il10, and Foxp3 and reducing the relative mRNA expression of proinflammatory cytokines TNF, Il6, and Il17. Our data suggest that Z. mobilis could alleviate disease progression and be considered a possible probiotic adjuvant for pathologies of the bowel

Suppurative Meningoencephalitis by <i>Pseudomonas aeruginosa</i> from Direct Extension of Chronic Otitis in a Gir Cow

This paper aims to report clinical, laboratory and pathological features in a case of suppurative meningoencephalitis by P. aeruginosa from the direct extension of chronic otitis in a Gir cow. The cow was recumbent during physical examination, and neurological examination revealed depression, absence of left eyelid and auricular motor reflex, and hypotonic tongue. Hematology revealed hemoconcentration, leukocytosis by neutrophilia, and hyperfibrinogenemia. Cerebrospinal fluid was slightly turbid, and presented polymorphonuclear pleocytosis, and hyperproteinorrachia. Grossly, the skull floor showed a purulent green–yellow exudate that drained from the left inner ear to the cisterna magna. There was diffuse congestion of the telencephalon, and meninges showed severe hyperemia, moderate thickening, and opacity with the deposition of fibrinosuppurative material ventrally, extending to the cerebellum and brainstem. The left cerebellar hemisphere showed an approximately 1.5 cm in diameter liquefaction area surrounded by a hemorrhagic halo. Histologically, cerebellar, mesencephalic, thalamic, and brain base meninges were intensely thickened and showed severe suppurative inflammation and fibrin deposition. Small multifocal suppurative areas were observed in the cerebellum and brainstem, characterized by a necrotic core, a number of neutrophils, and Gram-negative intralesional bacillary myriads. Pure cultures of P. aeruginosa were obtained and identified in the suppurative CNS lesions, meninges, and inner ear samples. This report highlights an uncommon clinical evolution of secondary P. aeruginosa suppurative meningoencephalitis, probably triggered by recurrent parasitic otitis in an adult Gir cow. Veterinarians, practitioners, and farmers must be aware of the risk of CNS infections after unresolved media and inner otitis, especially in cattle breeds more prone to developing parasitic otitis, such as the Gir and Indubrasil breeds

Paralytic rabies in a goat

Abstract Background Paralytic form of rabies is frequent in cattle in Latin America, but it is uncommon in goats. There are few clinical reports on furious rabies affecting goats, and the sporadic cases of rabid goats from surveillance programs worldwide lack clinical data. Furthermore, few studies reported the cerebrospinal fluid findings in rabid livestock. Case presentation On a farm in Midwestern Brazil, six of 47 Saanen goats died within one week. No vaccination protocols were implemented on the farm and the owner stated bat bites history on the livestock. Although rabies is endemic in Brazil, livestock vaccination is not mandatory. One 1-year-old buck was evaluated and showed non-specific clinical signs evolving within 12-h to nervous signs. Cerebrospinal fluid analysis revealed mononuclear pleocytosis, hyperproteinemia and high glucose levels. At necropsy, no gross lesions were present. Microscopically, discrete to moderate perivascular lymphoplasmacytic cuffing in gray and white matter, neuronal necrosis, neuronophagia, and mononuclear ganglioneuritis was observed in the brainstem and cervical spinal cord. Immunohistochemistry revealed strong anti-rabies virus immunostaining. Fresh central nervous system samples were positive for rabies in direct fluorescent antibody test (dFAT) and mouse intracerebral inoculation test (MIT). Exposed livestock recommendations included immediate vaccination, a strict isolation period of 90 days, and booster vaccinations during the third and eighth weeks. Conclusion IHC revealed the widespread distribution of rabies virus antigen in the goat’s CNS, contrasting the discrete pathological changes. In this goat, definitive diagnosis of paralytic rabies was obtained through the association of epidemiological, clinical, laboratorial, pathological findings (histology and IHC) and gold standard confirmatory tests (dFAT and MIT)

Cervical Vertebral Stenotic Myelopathy in a Nelore Calf

This paper aims to report clinical, laboratory, radiographic, and pathological features in a case of cervical vertebral stenotic myelopathy (CVSM) affecting a 4-month-old Nelore calf for the first time. During physical examination, the calf could stand if assisted when lifting by the tail but fallen to the ground when trying to walk. Attempts to flex and extend the neck to the right side failed. Radiographs findings consisted of reduced intervertebral spaces, and misalignments between the endplates, more evident between the C3 and C4 vertebrae, resulting in narrowing of the spinal canal and compression of the spinal cord. Grossly, C4 showed cranial articular surface malformation, abnormal metaphyseal growth plate development, reduced vertebral body size and deformity. Histologically, C4 showed an abnormal vertebral bone development characterized by moderate replacement of trabecular bone by fibrous tissues, multifocal areas of dystrophic hyaline cartilage development, and cartilaginous growth failure along the metaphyseal growth plate. Cervical spinal cord within the stenotic vertebral canal showed swollen neurons with central chromatolysis, areas of Wallerian degeneration, and necrotic debris. In contrast with the well-known Wobbler syndrome in horses, the etiology of CVSM in cattle remains undetermined, and further genetic and pathological studies must be conducted to elucidate it