Acute exogenous intoxications in childhood: factors related to hospitalization / Intoxicações exógenas agudas na infância: fatores relacionados à internação hospitalar

ABSTRACT Objective: To describe the profile of children assisted in the Emergency Room of a Children reference Hospital in the South of Brazil, victims of acute poisoning between 2016 and 2021, to characterize the toxic agents and to present the factors related to hospitalization. Methods: Retrospective, descriptive and observational study with data collection from medical records at a children's hospital from July 2016 to June 2021 based on the compulsory notification forms. The characteristics of victims, of the incident, the type and class of the substance involved, the procedures demanded and the need for the Intensive Care Unit were evaluated. The outcome considered was hospitalization. Absolute and relative frequencies were calculated for the categorical variables and measures of central tendency and dispersion for the numerical ones. Binary logistic regression was performed to identify variables related to hospitalization. Results: There were 411 consultations, with the mean age of 7.2±5.5 years, and predominance of females (59.9%). Most of the poisoning occurred at home (82.1%) and orally (93.7%). Chemicals or cleaning products were the main agents in children up to 1 year of age, whereas in the other age groups accidents occurred most frequently with medicines. Hospital admission occurred in 38.7% of the cases, with related variables being: number of agents, type of substance involved, medication that acts on the Central Nervous System, recurrence, motivation (accidental/intentional), and performance of simple exams. Conclusions: More preventive actions are needed, such as legislation, as well as greater guidance to parents on how to store products in the domestic environment, in order to reduce the number of exogenous intoxications in the pediatric population.

RESUMO Objetivo: Descrever o perfil das crianças atendidas na emergência de um hospital de referência pediátrica no sul do Brasil, vítimas de intoxicação exógena aguda entre 2016 e 2021, caracterizar os agentes tóxicos e descrever os fatores que se relacionam à internação hospitalar. Métodos: Estudo descritivo e analítico, com dados de prontuários de hospital pediátrico entre julho de 2016 e junho de 2021, por consulta às fichas de notificação compulsória. Foram avaliadas características das vítimas; do incidente; tipo de substância envolvida e classe; procedimentos realizados; necessidade de internação hospitalar, desfecho e necessidade de UTI. Calcularam-se frequências absolutas e relativas para as variáveis categóricas e medidas de tendência central e dispersão para as numéricas. Regressão logística binária foi realizada para identificar as variáveis associadas à internação. Resultados: Houve 411 atendimentos, com idade média de 7,2±5,5 anos, predomínio do sexo feminino (59,9%). A maioria das intoxicações ocorreu em domicílio (82,1%) e por via oral (93,7%). Produtos químicos ou de limpeza foram majoritários nas crianças com até um ano de idade, sendo os medicamentos os principais agentes nas demais faixas etárias. Resultaram em internações 38,7% dos casos, sendo as variáveis associadas: quantidade de agentes envolvidos, tipo de substância envolvida, medicamento que atua no Sistema Nervoso Central, recorrência, motivação (acidental/intencional) e realização de exames simples. Conclusões: Mais ações preventivas são necessárias, como legislações e maior orientação aos pais sobre a forma de armazenamento de produtos em ambiente doméstico, de modo a reduzir o número de intoxicações exógenas na população pediátrica.

Acute exogenous intoxications in childhood: factors related to hospitalization.

OBJECTIVE: To describe the profile of children assisted in the Emergency Room of a Children reference Hospital in the South of Brazil, victims of acute poisoning between 2016 and 2021, to characterize the toxic agents and to present the factors related to hospitalization. METHODS: Retrospective, descriptive and observational study with data collection from medical records at a children's hospital from July 2016 to June 2021 based on the compulsory notification forms. The characteristics of victims, of the incident, the type and class of the substance involved, the procedures demanded and the need for the Intensive Care Unit were evaluated. The outcome considered was hospitalization. Absolute and relative frequencies were calculated for the categorical variables and measures of central tendency and dispersion for the numerical ones. Binary logistic regression was performed to identify variables related to hospitalization. RESULTS: There were 411 consultations, with the mean age of 7.2±5.5 years, and predominance of females (59.9%). Most of the poisoning occurred at home (82.1%) and orally (93.7%). Chemicals or cleaning products were the main agents in children up to 1 year of age, whereas in the other age groups accidents occurred most frequently with medicines. Hospital admission occurred in 38.7% of the cases, with related variables being: number of agents, type of substance involved, medication that acts on the Central Nervous System, recurrence, motivation (accidental/intentional), and performance of simple exams. CONCLUSIONS: More preventive actions are needed, such as legislation, as well as greater guidance to parents on how to store products in the domestic environment, in order to reduce the number of exogenous intoxications in the pediatric population.

Molecular identification and antimicrobial resistance pattern of Nocardia isolated from 14 diseased dogs and cats.

Nocardia are ubiquitous, saprophytic and opportunistic bacteria. They cause a set of pyogenic clinical infections in animals and humans, particularly immunocompromised patients, mostly affecting the skin and respiratory tract, with refractoriness to conventional therapy. The most descriptions of nocardial infections in companion animals involve case reports, and there are scarce case series studies focused on canine and feline nocardiosis in which diagnosis has been based on molecular techniques. We investigated epidemiological aspects, clinical findings, in vitro susceptibility profile, and molecular identification of Nocardia using PCR-based method targeted 16S rRNA gene in twelve dogs and two cats. Among dogs were observed cutaneous lesions (8/12 = 67%), pneumonia (3/12 = 25%), and encephalitis (2/12 = 17%), whereas cats developed cutaneous lesions and osteomyelitis. Nocardia and canine morbillivirus coinfection was described in six dogs (6/12 = 50%). A high mortality rate (6/8 = 75%) was seen among dogs. Three dogs (3/4 = 75%) and one cat (1/2 = 50%) with systemic signs (pneumonia, encephalitis, osteomyelitis), and 83% (5/6) of dogs with a history of concomitant morbillivirus infection died. N. nova (5/12 = 42%), N. cyriacigeorgica (3/12 = 25%), N. farcinica (2/12 = 17%), N. veterana (1/12 = 8%), and N. asteroides (1/12 = 8%) species were identified in dogs, whereas N. africana and N. veterana in cats. Among the isolates from dogs, cefuroxime (12/12 = 100%), amikacin (10/12 = 83%), gentamycin (10/12 = 83%), and imipenem (10/12 = 83%) were the most effective antimicrobials, whereas cefuroxime, cephalexin, amoxicillin/clavulanic acid, imipenem, and gentamycin were efficient against isolates from cats. Multidrug resistance was observed in 36% (5/14) of isolates. We describe a variety of Nocardia species infecting dogs and cats, multidrug-resistant ones, and a high mortality rate, highlighting a poor prognosis of nocardiosis in companion animals, particularly among animals systemically compromised or coinfected by canine morbillivirus. Our study contributes to species identification, in vitro antimicrobial susceptibility profile, clinical-epidemiological aspects, and outcome of natural Nocardia-acquired infections in dogs and cats.

Pathology in Practice.

In collaboration with the American College of Veterinary Pathologists.

Acrochordonous plaque in a Doberman Pinscher dog.

An 8-yr old, neutered female Doberman Pinscher was presented for dermatological evaluation due to numerous pruritic, non-pigmented nodules that created a plaque in the lumbo-sacral region. This report is the first published photographic record of an acrochordonous plaque in a dolichocephalic dog and is the first reported case in Brazil.

Ki67/KIT double immunohistochemical staining in cutaneous mast cell tumors from Boxer dogs.

Cutaneous mast cell tumors (MCTs) are among the most frequent malignant tumors in dogs and Boxer breed dogs have a higher incidence of this disease. Ki67 staining and KIT staining are widely used to predict natural behavior in canine MCT but no previous study has evaluated double staining of these proteins as a prognostic factor. Based on biological behavior predictors in canine MCT, the purpose of this study was to determine the Ki67 proliferative index in KIT positive cells using double stain immunohistochemistry technique. Sixty-nine MCTs from Boxer dogs were selected and a tissue microarray was constructed for the double stained immunohistochemistry. Double positivity (Ki67(+)/KIT(+)) was observed in 20/69 (29%) MCT, with a mean of 9.06 double positive cells per tissue core (range 0.48%-43.97%) and Ki67(-)/KIT(+) animals had a longer survival time than Ki67(+)/KIT(+) animals (p=0.03).

Anterior uveal spindle cell tumor in a blue-eyed mixed-breed dog.

A female, eight-year-old, mixed-breed blue-eyed dog was presented for ophthalmic evaluation because its left eye had "changed color" one year previously. The before left eye was enucleated and submitted for evaluation. Histopathological analysis revealed an invasive neoplastic mass effacing most of the ventral aspect of the iris stroma. A diagnosis of an anterior uveal spindle cell tumor was made. Immunohistochemical results were strongly suggestive of a schwannoma, but some smooth muscle differentiation was also observed. Two and a half years after therapeutic enucleation there was no evidence of neoplasm recurrence or metastasis.

Supposed primary conjunctival lymphoma in a dog.

A 7-year-old, male mixed-breed dog was presented for evaluation of a well-delineated, pink, oval and slightly firm mass with a smooth regular surface that was expanding approximately 60% of the lower eyelid conjunctiva and the lateral canthus. The dog had a supposed primary B-cell lymphoma at the temporal canthus of the upper eyelid conjunctiva of the same eye that had been removed approximately 3 years earlier. No metastases were detected at either presentation. Histologically, the conjunctival lamina propria was effaced by a well-delineated, unencapsulated and expansile highly cellular neoplasm composed of sheets of round cells that were immunohistochemically positive for CD20 and CD79a negative for CD3. Based on the microscopic and immunohistochemical findings, a diagnosis of supposed primary B cell conjunctival lymphoma was made. Primary ocular and adnexal ocular lymphomas in dogs are rarely reported and their behavior is poorly characterized. Further tumor recurrence was not observed one year post operatively. This case was considered unusual because of its conjunctival involvement and the clinical course with recurrence after three years of a surgical therapeutic procedure.

Uncommon mandibular osteomyelitis in a cat caused by Nocardia africana.

BACKGROUND: Nocardiosis is an unusual infection in companion animals characterized by suppurative to pyogranulomatous lesions, localized or disseminated. Cutaneous-subcutaneous, pulmonary and systemic signs are observed in feline nocardiosis. However, osteomyelitis is a rare clinical manifestation in cats. Nocardia cyriacigeorgica (formerly N. asteroides sensu stricto), Nocardia brasiliensis, Nocardia otitidiscaviarum, and Nocardia nova are the most common pathogenic species identified in cats, based on recent molecular classification (16S rRNA gene). The present report is, to our knowledge, the first case of mandibular osteomyelitis in a cat caused by Nocardia africana, diagnosed based upon a combination of methods, including molecular techniques. CASE PRESENTATION: A one-year-old non-neutered female cat, raised in a rural area, was admitted to the Companion Animal Hospital-PUCPR, São José dos Pinhais, State of Paraná, Brazil, with a history a progressive facial lesion, difficulty apprehending food, loss of appetite, apathy and emaciation. Clinical examination showed fever, submandibular lymphadenitis, and a painless, 8 cm diameter mass, which was irregularly-shaped, of firm consistency, and located in the region of the left mandible. The skin around the lesion was friable, with diffuse inflammation (cellulitis), multiple draining sinuses, and exudation of serosanguinous material containing whitish "sulfur" granules.Diagnosis was based initially in clinical signs, microbiological culture, cytological, and histopathological findings, and radiographic images. Molecular sequencing of 16S rRNA of isolate allowed diagnosis of Nocardia africana. Despite supportive care and antimicrobial therapy based on in vitro susceptibility testing the animal died. CONCLUSION: The present report describes a rare clinical case of feline osteomyelitis caused by Nocardia africana, diagnosed based upon a combination of clinical signs, microbiological culture, cytological and histopathological findings, radiographic images, and molecular methods. The use of modern molecular techniques constitutes a quick and reliable method for Nocardia species identification, and may contribute to identification to new species of Nocardia that are virulent in cats.

Paracoccidioidomycosis in a dog: case report of generalized lymphadenomegaly.

Paracoccidioidomycosis (PCM) is a severe systemic mycosis, endemic in Latin America and highly prevalent in Brazil, where it ranks eighth as a mortality cause among infectious and parasitic diseases in humans. The disease in animals has been little explored. It is observed that armadillos can harbor the fungus at high frequencies, although the active disease has not been well documented in this wild mammal. Dogs are susceptible to experimental infection, and the naturally acquired PCM-disease was reported only recently in a dog from Brazil. The present work reports the second case of naturally acquired PCM in a 6-year-old female dog that presented emaciation, lymphadenomegaly, and hepatosplenomegaly. Biochemical and pulmonary radiographic evaluation did not reveal any abnormalities. PCM was diagnosed by clinical findings, culturing, immunohistochemistry, and histopathology of popliteal lymph node. The fungus was recovered from popliteal lymph node, and the molecular analysis showed respective sequencing similarities of 99 and 100% for 803 nucleotides of the Gp43 gene and 592 nucleotides from the ITS-5.8S region of Paracoccidioides brasiliensis. Immunohistochemistry revealed severe lymphadenitis and presented numerous yeasts, which reacted against the gp43 antibody. Histopathology revealed a severe granulomatous lymphadenitis associated with numerous single or multiple budding yeasts. After diagnosis, the dog was successfully treated with itraconazol for 2 years. Veterinarians should be aware of the importance of considering PCM for differential diagnosis, especially in dogs from PCM-endemic areas, whose monophagocytic system involvement is evident.

Evidence for a role of 5-HT(1A) receptor on antinociceptive action from Geissospermum vellosii.

ETHNOPHARMACOLOGICAL RELEVANCE: Geissospermum vellosii is a tree widely found throughout the Amazonic forest and frequently used by the native population for painful disorders. AIM OF THE STUDY: The present study examined the antinociceptive effects of Geissospermum vellosii in behavioral models of nociception. MATERIALS, METHODS AND RESULTS: Oral administration of crude extract of Geissospermum vellosii or its dichloromethane fraction (1-100 mg/kg) inhibited formalin-induced inflammatory nociception and acetic acid-induced visceral nociception. The antinociceptive effect of Geissospermum vellosii was unrelated with motor dysfunctions. Furthermore, the alkaloid 12-metoxy-1-methyl-aspidospermidine (0.001-1 mg/kg), isolated from the dichloromethane fraction, also produced antinociception. The antinociception caused by the dichloromethane fraction was significantly attenuated by pre-treatment of mice with p-chlorophenylalanine methyl ester (PCPA, an inhibitor of serotonin synthesis, 100 mg/kg once a day for 4 consecutive days) and WAY-100635 (a 5-HT(1A) receptor antagonist, 0.3 mg/kg). In contrast, dichloromethane fraction antinociception was not affected by pre-treatment of animals with ketanserin (a 5-HT(2) receptor antagonist, 0.3 mg/kg) or ondansetron (a 5-HT(3) receptor antagonist, 0.5 mg/kg). CONCLUSIONS: Together, these results indicate that Geissospermum vellosii produces antinociception through an interaction with 5-HT(1A) receptors. Furthermore, the alkaloid 12-metoxy-1-methyl-aspidospermidine contributes to the antinociceptive properties reported for Geissospermum vellosii.

Síndrome do gucagonoma em cão / Glucagonoma syndrome in a dog

O eritema necrolítico migratório é rara dermatose caracterizada por lesões erodo-ulcerativas e crostosas em áreas intertriginosas, junções mucocutâneas, superfícies articulares e de apoio crônico, que tem sido descrita em seres humanos, cães, gatos e rinocerontes. Sua etiologia tem sido relacionada a neoplasias pancreáticas, mormente das células alfa produtoras de glucagon, e a graves doenças do parênquima hepático ou gastroentérico. Relata-se o caso de um cão com necrose epidérmica metabólica secundária a glucagonoma, que apresenta fortes similaridades com a síndrome do glucagonoma em humanos.

Nail fold Necrolytic migratory erythema is a rare skin dermatosis characterized by erosive and crusted lesions in intertriginous areas, mucocutaneous junctions, articular areas and pressure points. It has been described in humans, dogs, cats and rhinoceros. The cause of this condition is related to glucagon-secreting alpha cell tumor of the pancreas, severe hepatopathy or gastrointestinal disease. Here, we report the case of a dog with necrolytic migratory erythema due to glucagonoma, closely resembling the glucagonoma syndrome observed in humans.

Parasympathetic dysfunction is associated with baroreflex and chemoreflex impairment in streptozotocin-induced diabetes in rats.

This study explored physiological mechanisms of diabetic dysfunction in baroreceptors and chemoreceptors-mediated hemodynamic responses, and cholinergic neurotransmission in 30-day diabetic rats (n = 14) and controls (n = 14). Basal hemodynamic data and vagal response to electrical stimulation and methacholine injection were also evaluated. Muscarinic receptors were characterized using a radioligand receptor binding assay ([3H]N methylscopolamine). Experimental diabetes (50 mg/kg of STZ, i.v.) decreased systolic, diastolic, and mean arterial pressure and basal heart rate. Heart rate (HR) responses to vagal electrical stimulation (16, 32, and 64 Hz) were 15%, 11%, and 14% higher in diabetics vs non-diabetics, as were HR responses to methacholine injection (-130+/-24, -172+/-18, -206+/-15 bpm vs. -48+/-15, -116+/-12, -151+/-18 bpm, P < 0.05). Muscarinic receptor density was higher (267.4+/-11 vs 193.5+/-22 fmol/mg/prot, P < 0.05) in the atria of diabetic rats than in those of controls; the affinity was similar between groups. Diabetes-induced reduction of reflex responses to baro- (reflex bradycardia: -3.4+/-0.3 and -2.7+/-0.2 bpm/mm Hg; reflex tachycardia: -1.6+/-0.1 and -1.4+/-0.07 bpm/mm Hg, in control and diabetics, P < 0.05) and chemoreceptor stimulation, enhancement of HR responsiveness to cardiac vagal electrical stimulation and methacholine stimulation, plus an increase in the number of atrial muscarinic receptors indicates reduced parasympathetic activity, which is probably derived from central nervous system derangement.

Representações sociais do idoso que participa de grupos para terceira idade no município de Santa Cruz do Sul / Social representations of old-aged people who participe of third Age groups in Santa Cruz do Sul city

Esta pesquisa teve como objetivo verificar como o idoso do município de Santa Cruz do Sul/ RS que freqüenta algum grupo de convivência está representando a sua velhice e quais as influências culturais e regionais sofridas por este segmento. Buscou-se através de um questionário misto (com perguntas fechadas e abertas) respondido por 10 por cento dos idosos que freqüentam grupos de convivência no município, verificar quem são os idosos de Santa Cruz do Sul que participam de grupos, em que condições eles vivem e como ocupam o seu tempo livre. Este estudo servirá de base para podermos entender como os fatores sócio-culturais influenciam na construção das representações sociais dos idosos(AU)