Cytotoxic effects of crotoxin from Crotalus durissus terrificus snake in canine mammary tumor cell lines

Background: Mammary gland tumors are the most prevalent neoplasm in intact female dogs, and they are good natural models to study comparative oncology. Most canine mammary malignancies, as in women, are commonly refractory to conventional therapies and demand continuous new therapeutic approaches. Crotalus durissus terrificus, also called rattlesnake, has more than 60 different proteins in its venom with multiple pharmaceutical uses, such as antitumor, antiviral, and antimicrobial action. Crotoxin, a potent β-neurotoxin formed by the junction of two subunits, a basic subunit (CB-PLA2) and an acidic subunit (crotapotin), has already been reported to have anticancer properties in different types of cancers. Methods: In this work, we describe the cytotoxic potential of crotoxin and its subunits compared to doxorubicin (drug of choice) in two canine mammary carcinoma cell lines. Results: Crotoxin, CB-PLA2, crotalic venom, and doxorubicin decreased cell viability and the ability to migrate in a dose-dependent manner, and crotapotin did not present an antitumoral effect. For all compounds, the predominant cell death mechanism was apoptosis. In addition, crotoxin did not show toxicity in normal canine mammary gland cells. Conclusion: Therefore, this work showed that crotoxin and CB-PLA2 had cytotoxic activity, migration inhibition, and pro-apoptotic potential in canine mammary gland carcinoma cell lines, making their possible use in cancer research.

The impact of synthetic bone grafting for tissue regeneration: an in vivo study

Aims: This study aimed to examine the biological response of synthetic nanocomposite material on canine mandibular bone. Methods: Nine healthy adult male local breed dogs aged 12 to 18 months and weighing 10.2 to 15.2 kg were used in the study. Based on healing intervals of 1 and 2 months, the dogs were divided into 2 groups. Each group had 3 subgroups with 3 dogs each. The division was based on the grafting material used to fill the created defect: an empty defect (Control-ve), Beta-Tricalcium Phosphate, and nanocomposite (Beta-Tricalcium Phosphate and nanosilver 1%) . Surgery started after the dogs were anaesthetized. The surgical procedure began with a 5 cm parallel incision along the mandible's lower posterior border. After exposing the periosteum, a three 5mm-diameter, 5-mmdeep critical-size holes were made, 5mm between each one. Each group's grafting material had independent 3 holes. The defects were covered with resorbable collagen membranes followed by suturing of the mucoperiosteal flap. Results: Total densitometric analysis showed no significant differences between groups at 1-month intervals, with the nanocomposite group having a higher mean rank (165.66± 31.21) in comparison to other groups while at 2 months intervals that there was a highly significant difference between three groups as the P-value was (0.000) with the nanocomposite group having a higher mean rank (460.66± 26.40). Conclusions: In the current study, the use of nanocomposites improved osteoconductivity by accelerating new bone formation. Moreover, the encorporation of nanosilver enhanced growth factor activity. These attributes make nanocomposites a promising material for enhancing the bone healing process

Lesiones ocasionadas por mordeduras de perros en niños atendidos en un hospital de tercer nivel de Bolivia / Dog bite injuries in children seen at a tertiary care hospital in Bolivia

Introducción. Este estudio pretende caracterizar las lesiones provocadas por perros en niños de un hospital pediátrico de Bolivia. Población y métodos. Se realizó un estudio observacional, retrospectivo, en pacientes atendidos del 2017 al 2021. Resultados. Se estudiaron 769 pacientes. Las lesiones representaron el 5,6 % de las emergencias y el 0,8 % de las internaciones. Fueron más frecuentes en niños de hasta 5 años (55,1 %), en quienes se observó mayor gravedad de las lesiones (p = 0,008), antecedente de provocación al animal (p = 0,048), un animal agresor conocido (p <0,036), el contexto doméstico del accidente (p = 0,021), mayor frecuencia de profilaxis con suero luego de la exposición (p = 0,005) y regiones afectadas principalmente maxilofaciales (p <0,001). Observamos 3 casos de mortalidad por rabia humana y 1 por shock hipovolémico. Conclusión. Las lesiones producidas por perros son causas frecuentes de visita a emergencia y hospitalización en pediatría, y tienen características particulares en niños de hasta 5 años de edad.

Introduction. The objective of this study is to describe the characteristics of dog bite injuries in children seen at a children's hospital in Bolivia. Population and methods. This was an observational, retrospective study in patients seen between 2017 and 2021. Results. A total of 769 patients were studied. Dog bite injuries accounted for 5.6% of emergency visits and 0.8% of hospitalizations. They were more frequent in children younger than 5 years (55.1%), in whom the following were observed: greater injury severity (p = 0.008), history of animal provocation (p = 0.048), known attacking animal (p < 0.036), domestic accident (p = 0.021), greater frequency of post-exposure prophylaxis with anti-rabies serum (p = 0.005), and maxillofacial area as the main region involved (p < 0.001). There were 3 deaths due to human rabies and 1 due to hypovolemic shock. Conclusion. Dog bite injuries are a frequent cause of visit to the emergency department and hospitalization in pediatrics and have specific characteristics in children younger than 5 years.

Conservation of Organs (Heart, Brain and Kidney) of Canine by Cold-Temperature Silicone Plastination in an Animal Anatomy Laboratory in Ecuador / Conservación de Órganos (Corazón, Encéfalo y Riñón) de Canino Mediante la Técnica de Plastinación en Silicona al Frío Realizada en Laboratorio de Anatomía Animal en Ecuador

SUMMARY: For the purposes of teaching anatomy, the use of cadaver preparations is considered the most efficient way of ensuring that students retain knowledge. Nevertheless, in Ecuador the use of animal specimens in universities must comply with the internationally accepted principles of replacement, reduction and refinement (3Rs). Plastination is an alternative technique which allows organs to be conserved in the long term and complies with the 3Rs. The object of the present work was to use cold-temperature silicone plastination with Biodur® products to obtain long-lasting, easy-to-handle canine organs for use as tools for the teaching of animal anatomy. Six canine cadavers were obtained from local animal protection charities. The hearts, brains and kidneys of the cadavers were dissected and fixed with formaldehyde 10 %. They were then dehydrated with acetone at -20 °C. The specimens were impregnated with Biodur® S10:S3 (-20 °C) and finally cured with Biodur® S6. We plastinated six hearts, twelve kidneys, four brains and one encephalic slice of canine. The application of cold-temperature plastination to canine organs followed the parameters established for the conventional protocol, enabling us to obtain organs of brilliant appearance, free of odours, in which the anatomical form was preserved. Thus the technique helped us to comply with the 3Rs, as we obtained easy-to-handle teaching models to replace fresh or formaldehyde-fixed samples for the teaching-learning of the canine anatomy.

En la enseñanza de la Anatomía, el uso de preparaciones cadavéricas se considera el método que permite a los estudiantes retener el conocimiento de una forma más eficiente. No obstante, en Ecuador, el uso de especímenes animales en las universidades se debe realizar bajo el principio internacional de reemplazo, reducción y refinamiento (3Rs). La técnica de plastinación es una técnica alternativa que permite preservar órganos a largo plazo y que se adapta al principio de las 3Rs. El objetivo del trabajo fue utilizar la técnica de plastinación en silicona al frío con productos Biodur® para obtener órganos caninos duraderos y manejables útiles como herramienta para la enseñanza de la anatomía animal. Se obtuvieron seis cadáveres de caninos de fundaciones locales para la protección animal. Se realizaron disecciones de corazones, cerebros y riñones de los cadáveres caninos. Los órganos se fijaron con formalina al 10 %. A continuación, se llevó a cabo la deshidratación con acetona a -20 °C. Los especímenes fueron impregnados con S10:S3 Biodur® (-20 °C) y al final fueron curados con Biodur® S6. Se lograron plastinar seis corazones, doce riñones, cinco encéfalos y un tallo encefálico de canino. La técnica de plastinación al frío utilizada para obtener órganos de canino conservó los parámetros empleados en el protocolo convencional y permitió obtener órganos que presentaron aspecto brillante, ausencia de olores y mantuvieron la forma anatómica. Por lo que, la técnica facilitó cumplir con el principio de las 3Rs al obtenerse modelos didácticos fáciles de manipular que pueden reemplazar muestras frescas o formolizadas en el proceso de enseñanza-aprendizaje de la anatomía del canino.

Immunofluorescence Analysis of Estrogen and Progesterone Receptors and Ki-67 Nuclear Protein in Canine Uteri Treated with Medroxyprogesterone Acetate During Anestrus / Análisis de Inmunofluorescencia de Receptores de Estrógeno y Progesterona y Proteína Nuclear Ki-67 en Úteros Caninos Tratados con Acetato de Medroxiprogesterona Durante el Anestr

SUMMARY: Estradiol and progesterone receptors play an essential role in the changes occurring in the uterus during the estrus cycle in dogs (Canis lupus familiaris). In order to investigate the potential effect of progestational agent medroxyprogesterone acetate (MPA) when is used during anestrus on the expression of estradiol receptors [ER], progesterone receptors [PR] and nuclear protein Ki67, we evaluated uterine tissue immunohistochemically. Uteri were grouped as nulliparous (control, n=11), multiparous (n=11) and treated with MPA (n=11; nulliparous with two treatments; 5mg/kg; i.m.). The amount and location of PR, ER and Ki67 were studied on the epithelial surface, apical and basal regions of the endometrium and myometrium using immunohistochemical techniques with a spectral confocal microscope and analyzed by ANOVA. Differences in ER were observed between the multiparous and MPA-treated groups in the apical region of the endometrium (p=0.0022). Differences in cell proliferation were detected between the nulliparous and multiparous groups (p=0.0037) and nulliparous and MPA-treated groups (p=0.0003) in the basal region of the endometrium. In conclusion, two doses of MPA (5mg/kg; i.m.) do not have a significant effect on the expression of ER and PR; however, they inhibit cell proliferation in the basal region of the endometrium, which includes the stroma, subepithelial cell layer, compact layer, and spongy layer. The clinical and long-term effect of this treatment should be evaluated in subsequent studies.

Los receptores de estradiol y progesterona juegan un rol fundamental en los cambios que se producen en el útero durante el ciclo estral de las perras (Canis lupus familiaris). El objetivo de este estudio fue evaluar las expresiones de ER-a y PR en el útero y la proliferación de células endometriales detectando la expresión nuclear de la proteína Ki67 en perras expuestas a la progestina sintética MPA y compararlas con perras nulíparas y multíparas expuestas a progesterona luteal. Úteros fueron agrupados como nulíparas (control, n=11), multíparas (n=11) y tratadas con MPA (n=11; nulíparas con dos tratamientos; 5 mg/kg; i.m.). La expresión de PR, ER-a y Ki67 fue evaluada en la regiones apicales y basales del endometrio y miometrio con un microscopio confocal espectral. Se observó diferencias en ER-a entre los grupos multíparas y tratados con MPA en la región apical del endometrio (p=0,0022). Se detectaron diferencias en la proliferación celular entre los grupos de nulíparas y multíparas (p=0,0037) y los grupos de nulíparas y tratados con MPA (p=0,0003) en la región basal del endometrio. En conclusión, dos dosis de MPA (5mg/kg; i.m.) no tienen un efecto significativo sobre la expresión de ER y PR; sin embargo, inhiben la proliferación celular en la región basal del endometrio, el cual incluye a estroma, capa de células subepiteliales, estratos compacto y esponjoso. El efecto clínico a largo plazo de este tratamiento debe ser evaluado en estudios posteriores.

Anamnesis ambiental como parte de la consulta pediátrica: estudio piloto / Environmental history-taking as part of pediatric consultations: a pilot study

Introducción. La salud ambiental infantil es la rama de la pediatría que estudia la influencia del medioambiente en la salud y la enfermedad de los niños. Las exposiciones ambientales globales representan una seria amenaza para la salud, lo que justifica una mayor investigación y acción. Objetivo. Evaluar la salud ambiental de una muestra de niños que viven en áreas urbanas y rurales de la ciudad de Uruguaiana, Brasil. Población y métodos. Se incluyeron padres/tutores (n = 714) de niños atendidos en el Policlínico Infantil de la Ciudad de Uruguaiana de enero a octubre de 2021, que respondieron la anamnesis ambiental en pediatría (Sociedad Brasileña de Pediatría). Los datos obtenidos se analizaron según la residencia en zona urbana o rural, o el ingreso familiar. Resultados. Al comparar los habitantes de la zona urbana (n = 660) con los de la zona rural (n = 54), verificamos que entre los de la zona rural fue significativamente mayor la actividad con productos químicos (15 % vs. 32,7 %; p = 0,004), vivir cerca de plantación (7,5 % vs. 74,5 %; p <0,001) o con fuente de contaminación (4,8 % vs. 32,7 %; p <0,001), tener perro (62 % vs. 87,3 %; p <0,001), usar plaguicidas (0,6 % vs. 32,7 %; p <0,001) y exposición a contaminación química (2,6 % vs. 18,2 %; p <0,001). En el área urbana predominó la exposición al tránsito de vehículos cerca de la vivienda (85 % vs. 48,1 %; p <0,001), renta media inferior a 3 salarios mínimos (90 %) y baja escolaridad. Conclusión. Realizar la anamnesis ambiental es fundamental para la detección de amenazas ambientales presentes en los lugares donde los niños y adolescentes viven, aprenden, juegan y estudian.

Introduction. Children's environmental health studies the influence of the environment on health and disease in children. Global environmental exposures pose a serious threat to health, warranting further research and action. Objective. To assess the environmental health of a sample of children living in urban and rural areas in Uruguaiana, Brazil. Population and methods. We included parents/legal guardians (n = 714) of children seen at Policlinica Infantil de Uruguaiana between January and October 2021, who completed the environmental history- taking in pediatrics (Brazilian Society of Pediatrics). Collected data were analyzed based on place of residence (urban or rural) or household income. Results. The comparison between inhabitants of the urban area (n = 660) and the rural area (n = 54) established that, among those living in the rural area, activity with chemical substances (15% versus 32.7%; p = 0.004), living near a plantation (7.5% versus 74.5%; p < 0.001) or near a source of contamination (4.8% versus 32.7%; p < 0.001), having a dog (62% versus 87.3%; p < 0.001), using pesticides (0.6% versus 32.7%; p < 0.001), and exposure to chemical contamination (2.6% versus 18.2%; p < 0.001) were significantly higher. In the urban area, exposure to vehicle traffic near the house (85% versus 48.1%; p < 0.001), an average income below 3 minimum wages (90%), and a low level of education predominated. Conclusion. Environmental history-taking is critical for the detection of environmental threats present in the areas where children and adolescents live, learn, play, and study

Expression and distribution of kallikrein-related peptidases 5, 7, 8 and 10 in normal apocrine gland of canine skin / Expresión y distribución de péptidos relacionados con la calicreína 5, 7, 8 y 10 en glándula apocrina normal de piel canina

SUMMARY: Apocrine glands are sweat glands that are located in the skin of the dog. Anal sac apocrine, circunanal apocrine, and mammary glands are considered modified apocrine structures, and there are about nine possible types of neoplasms and other tumors in the apocrine glands of the dog and cat, including cysts, adenoma, carcinoma, and adenocarcinoma. Thus, it is important to provide new markers to characterize these glands to improve the histopathological diagnosis. In this article, we describe the distribution of kallikrein- related peptidases 5, 7, 8, and 10 in the normal apocrine glands of the dog's skin. These proteases have been shown to play a fundamental role in the homeostasis of the human skin barrier but have been scarcely studied in canine skin.

Las glándulas apocrinas son glándulas sudoríparas que se encuentran en la piel del perro. Las glándulas apocrinas del saco anal, apocrinas circunanales y mamarias se consideran estructuras apocrinas modificadas, y existen alrededor de nueve tipos posibles de neoplasias y otros tumores en las glándulas apocrinas del perro y el gato, incluidos quistes, adenoma, carcinoma y adenocarcinoma. Por lo tanto, es importante proporcionar nuevos marcadores para caracterizar estas glándulas para mejorar el diagnóstico histopatológico. En este artículo, describimos la distribución de las peptidasas 5, 7, 8 y 10 relacionadas con la calicreína en las glándulas apocrinas normales de la piel del perro. Se ha demostrado que estas proteasas desempeñan un papel fundamental en la homeostasis de la barrera de la piel humana, pero apenas se han estudiado en la piel canina.

Shock séptico de foco respiratorio por Pasteurella multocida en un paciente inmunocompetente. Caso Clínico / Septic shock originating from a pulmonary focus caused by Pasteurella multocida. Report of one case

Pasteurella multocida is a gram-negative coccobacillus bacterium found as a commensal in the oropharynx of domestic animals such as cats and dogs and some farm animals. Soft tissue infections and occasionally bacteremia in immunocompromised patients with direct contact with animals are described. We report a 61 year old male with a history of scratches and close contact with domestic cats, with a septic shock originating from a pulmonary focus, requiring mechanical ventilation and vasopressors. Blood cultures disclosed the presence of Pasteurella multocida. He responded successfully to antimicrobials.

Utilização da cannabis sativa para tratamento de dor crônica em cães / Use of cannabis sativa for the treatment of chronic pain in dogs / Uso de cannabis sativa para el tratamiento del dolor crónico en perros

A Cannabis sativa é uma planta que apresenta vários benefícios terapêuticos para animais, como tratamento da dor neuropática, inflamatória e osteoartrose. A dor é bastante recorrente na rotina clínica, sendo importante seu manejo para que seja ofertada uma melhor qualidade e conforto de vida para o paciente. O estudo objetivou identificar, a partir de evidências científicas, as características da utilização medicinal do uso de Cannabis Sativa no tratamento da dor crônica no cão, utilizando um dos seus princípios ativos, canabidiol (CBD). Foi feito uma revisão bibliográfica onde foi realizada a busca de estudos experimentais e relatos de caso em bases de dados eletrônicos, sendo incluídas fontes contendo a utilização do CBD em animais, que abordaram controle da dor, assim como escore avaliativo da dor antes, durante e após o tratamento proposto. Após eleger e analisar 54 estudos percebe-se que na medicina veterinária o uso do canabidio é insuficiente, uma vez que o foco da maior parte dos estudos clínicos é voltado para medicina humana. Ainda assim, a utilização de CBD mostrou-se eficaz, confirmando uma nova alternativa para o controle da dor em animais.(AU)

Cannabis sativa is a plant that has several therapeutic benefits for animals, such as the treatment of neuropathic and inflammatory pain and osteoarthritis. Pain is quite recurrent in the clinical routine, and its management is important to offer a better quality and comfort of life for the patient. The study aimed to identify, based on scientific evidence, the characteristics of the medicinal use of Cannabis Sativa in the treatment of chronic pain in dogs, using one of its active principles, cannabidiol (CBD). A bibliographical review was carried out in which experimental studies and case reports were searched in electronic databases, including sources containing the use of CBD in animals, which addressed pain control, as well as pain assessment score before, during and after the proposed treatment. After choosing and analyzing 54 studies, it is clear that in veterinary medicine the use of CBD is few, and the focus of clinical studies is on human medicine. The use of CBD proved to be effective, thus confirming a new alternative for pain control in animals.(AU)

El cannabis sativa es una planta que tiene varios beneficios terapéuticos para los animales, como el tratamiento del dolor neuropático e inflamatorio y la osteoartritis. El dolor es bastante recurrente en la rutina clínica, y su manejo es importante para ofrecer una mejor calidad y comodidad de vida al paciente. El estudio tuvo como objetivo identificar, con base en la evidencia científica, las características del uso medicinal de Cannabis Sativa en el tratamiento del dolor crónico en perros, utilizando uno de sus principios activos, el cannabidiol (CBD). Se realizó una revisión bibliográfica en la que se buscaron estudios experimentales y reportes de casos en bases de datos electrónicas, incluyendo fuentes que contengan el uso de CBD en animales, que abordaran el control del dolor, así como la puntuación de evaluación del dolor antes, durante y después del tratamiento propuesto. Después de elegir y analizar 54 estudios, queda claro que en medicina veterinaria el uso de cannabidio es insuficiente, ya que el foco de la mayoría de los estudios clínicos está en la medicina humana. Aun así, el uso de CBD demostró ser efectivo, confirmando una nueva alternativa para el control del dolor en animales.(AU)

Carcinoma de células escamosas (cce) em cão na região prepucial: relato de caso / Squamous cell carcinoma (scc) in dog in the preputial region: case report / Carcinoma de células escamosas (cce) en perro de la región prepucial: reporte de un caso

A expectativa de vida dos animais de companhia vem aumentando devido as mudanças comportamentais e de cuidados dos tutores. Em analogia, com as idades cada vez mais avançadas, é comum o desenvolvimento de doenças associadas, sendo o tumor o mais comum entre elas. Todavia, as neoplasias mais comuns na clínica de pequenos animais estão associadas ao sistema tegumentar. O carcinoma de células escamosas (CCE), ou carcinoma espinocelular, é uma neoplasia de epitélio, maligno, de crescimento lento e de baixo potencial metastático. Sua etiologia ainda não é precisamente conhecida e a causa exógena mais comum e descrita pela literatura é a exposição à luz ultravioleta, gerando consequentes lesões nas estruturas genéticas e imunogênicas na pele. Além disso, essas lesões apresentam-se de forma mais comum em animais de pelagem clara, com grande exposição solar e em área anatômicas hipopigmentadas. O prognóstico varia de acordo com a localização e o estágio clínico, sendo favorável o diagnóstico realizado precocemente, e o tratamento consiste na avaliação clínica seguida do protocolo adequado O presente relato de caso tem como objetivo principal reunir e discutir informações associadas sobre o carcinoma de células escamosas em caninos e felinos, abordando aspectos clínicos e patológicos, a fim de facilitar o raciocínio sobre o CCE, desde sua abordagem inicial, até seu diagnóstico final e estadiamento.(AU)

The life expectancy of companion animals has been increasing due to behavioral and care changes of the guardians. In analogy, with the increasingly advanced ages, the development of associated diseases is common, the tumor being the most common among them. However, the most common neoplasms in the small animal clinic are associated with the integumentary system. Squamous cell carcinoma (SCC), or squamous cell carcinoma, is a malignant, slow-growing, low-potential metastatic epithelial neoplasm. Its etiology is not yet precisely known and the most common exogenous cause described by the literature is exposure to ultraviolet light, generating consequent lesions on the genetic and immunogenic structures in the skin. In addition, these lesions are more common in light-haired animals, with high exposure to the sun, and in hypopigmented anatomical areas. The prognosis varies according to the location and clinical stage, being favorable to the early diagnosis, and the treatment consists in the clinical evaluation followed by the appropriate protocol. The present case report has as its main objective to gather and discuss associated information about squamous cell carcinoma in canines and cats, addressing clinical and pathological aspects, in order to facilitate the reasoning about the CCE, from its initial approach, to its final diagnosis and staging.(AU)

La esperanza de vida de los animales de compañía ha ido en aumento debido a los cambios de comportamiento y cuidado de los guardianes. Por analogía, con las edades cada vez más avanzadas, el desarrollo de enfermedades asociadas es común, siendo el tumor el más común entre ellos. Sin embargo, las neoplasias más comunes en la clínica de animales pequeños se asocian con el sistema tegumentario. El carcinoma epidermoide (CCE), o carcinoma epidermoide, es una neoplasia epitelial metastásica maligna de crecimiento lento y bajo potencial. Su etiología aún no se conoce con precisión y la causa exógena más común descrita por la literatura es la exposición a la luz ultravioleta, generando lesiones consecuentes en las estructuras genéticas e inmunogénicas de la piel. Además, estas lesiones son más comunes en animales de pelo claro, con alta exposición al sol, y en áreas anatómicas hipopigmentadas. El pronóstico varía según la localización y el estadio clínico, siendo favorable al diagnóstico precoz, y el tratamiento consiste en la evaluación clínica seguida del protocolo adecuado. El presente reporte de caso tiene como objetivo principal reunir y discutir información asociada sobre el carcinoma epidermoide en caninos y gatos, abordando aspectos clínicos y patológicos, con el fin de facilitar el razonamiento sobre el CCE, desde su abordaje inicial, hasta su diagnóstico final y estadificación.(AU)

Linfoma em cão da raça cane corso: relato de caso / Lymphoma in a cane corso dog: case report / Linfoma en un perro cane corso: relato de un caso

Os linfócitos são células de defesa do organismo que funcionam como barreira contra infecções e células cancerígenas, elas circulam pelo sistema linfático e estão presentes por todo o organismo do animal, podem se proliferar de forma maligna, caracterizando o linfoma. Acometem em sua maioria, cães de raças de grande porte, animais de meia idade e idosos. Sendo uma doença de etiologia desconhecida, vários fatores podem contribuir para sua evolução, como deficiências autoimunes, bem como hábitos alimentares ao longo da vida do animal, ou até por predisposição genética. O presente relato de caso, tem o objetivo de mostrar a evolução gradual da doença, quais sinais clínicos o animal poderá apresentar, e como os exames laboratoriais podem nos auxiliar em seu diagnóstico.(AU)

The lymphocytes are defense cells of the body that act as a barrier against infection and cancer cells, they circulate through the lymphatic system and are present throughout the animal's body, and can proliferate in a malignant way, characterizing the lymphoma. They mostly affect large breed dogs, middle-aged and elderly animals. Being a disease of unknown etiology, several factors may contribute to its evolution, such as autoimmune deficiencies, as well as food habits throughout the animal's life, or even genetic predisposition. The present case report has the objective of showing the gradual evolution of the disease, which clinical signs the animal may present, and how laboratory tests can help us in its diagnosis.(AU)

Los linfocitos son células de defensa del organismo que actúan como barrera contra infecciones y células cancerígenas, circulan por el sistema linfático y están presentes en todo el organismo del animal, pudiendo proliferar de forma maligna, caracterizando el linfoma. Afectan sobre todo a perros de razas grandes, animales de mediana edad y ancianos. Siendo una enfermedad de etiología desconocida, varios factores pueden contribuir a su evolución, como deficiencias autoinmunes, así como hábitos alimentarios a lo largo de la vida del animal, o incluso predisposición genética. El presente caso clínico tiene como objetivo mostrar la evolución gradual de la enfermedad, qué signos clínicos puede presentar el animal y cómo las pruebas de laboratorio pueden ayudarnos en su diagnóstico.(AU)

Lyciumbarbarum polysaccharides ameliorate canine acute liver injury by reducing oxidative stress, protecting mitochondrial function, and regulating metabolic pathways / 浙江大学学报（英文版）（B辑：生物医学和生物技术）

The development of acute liver injury can result in liver cirrhosis, liver failure, and even liver cancer, yet there is currently no effective therapy for it. The purpose of this study was to investigate the protective effect and therapeutic mechanism of Lyciumbarbarum polysaccharides (LBPs) on acute liver injury induced by carbon tetrachloride (CCl4). To create a model of acute liver injury, experimental canines received an intraperitoneal injection of 1 mL/kg of CCl4 solution. The experimental canines in the therapy group were then fed LBPs (20 mg/kg). CCl4-induced liver structural damage, excessive fibrosis, and reduced mitochondrial density were all improved by LBPs, according to microstructure data. By suppressing Kelch-like epichlorohydrin (ECH)-associated protein 1 (Keap1), promoting the production of sequestosome 1 (SQSTM1)/p62, nuclear factor erythroid 2-related factor 2 (Nrf2), and phase II detoxification genes and proteins downstream of Nrf2, and restoring the activity of anti-oxidant enzymes like catalase (CAT), LBPs can restore and increase the antioxidant capacity of liver. To lessen mitochondrial damage, LBPs can also enhance mitochondrial respiration, raise tissue adenosine triphosphate (ATP) levels, and reactivate the respiratory chain complexes I‒V. According to serum metabolomics, the therapeutic impact of LBPs on acute liver damage is accomplished mostly by controlling the pathways to lipid metabolism. 9-Hydroxyoctadecadienoic acid (9-HODE), lysophosphatidylcholine (LysoPC/LPC), and phosphatidylethanolamine (PE) may be potential indicators of acute liver injury. This study confirmed that LBPs, an effective hepatoprotective drug, may cure acute liver injury by lowering oxidative stress, repairing mitochondrial damage, and regulating metabolic pathways.

Feral dogs in Chitral gol national park, Pakistan: a potential threat to the future of threatened Kashmir Markhor (Capra falconeri cashmiriensis) / Cães ferozes no parque nacional Chitral gol, Paquistão: uma ameaça potencial para o futuro do Markhor da Caxemira ameaçado (Capra falconeri cashmiriensis)

Feral dogs are well-organized hunters of ungulates in many parts of the world, causing great damage to wildlife populations and ultimately to the ecosystem. In Pakistan, the impacts of feral dogs on the wildlife have not been documented yet. In a period of fifteen years (2006-2020), feral dogs have killed hundreds of threatened markhor in Chitral gol national park (CGNP), Pakistan. Despite direct predation other impacts including disturbance and competition with other natural predators, could compromise conservation and management efforts. The population of feral dogs seems to have been increased with the increase of dumping sites by communities. Our findings suggest that there are pressing needs of controlling the feral dogs population and eradicating them from the core zone of CGNP and surrounding buffer communities. Conventional culling of dogs should be coupled with modern techniques like castration and sterilization. Communities should be educated regarding the clean environment, proper disposal of home wastes and, biodiversity conservation.

Os cães ferozes são caçadores bem organizados de ungulados em muitas partes do mundo, causando grandes danos à população de animais selvagens e, em última instância, ao ecossistema. No Paquistão, os impactos dos cães selvagens na vida selvagem ainda não foram documentados. Em um período de 15 anos (2006-2020), cães selvagens mataram centenas de markhor ameaçados no parque nacional Chitral gol (CGNP), Paquistão. Apesar da predação direta, outros impactos, incluindo distúrbios e competições com outros predadores naturais podem comprometer os esforços de conservação e manejo. A população de cães selvagens parece ter aumentado com o aumento dos locais de despejo pelas comunidades. Nossas descobertas sugerem que há necessidades urgentes para controlar a população de cães selvagens e erradicá-los da zona central do CGNP e das comunidades-tampão vizinhas. O abate convencional de cães deve ser combinado com técnicas modernas como castração e esterilização. As comunidades devem ser educadas sobre o meio ambiente limpo, o descarte adequado de resíduos domésticos e a conservação da biodiversidade.

Does low-intensity pulsed ultrasound accelerate phasic calcium phosphate ceramic-induced bone formation?

Purpose: Low-intensity pulsed ultrasound (LIPUS) has been used to stimulate the healing of the fresh fracture, delayed union, and non-union in both animal and clinical studies. Besides, biphasic calcium phosphate ceramic (BCP) is a promising biomaterial for bone repair as it shows favorable biocompatibility, osteoinduction, and osteoconduction. However, scarcity is known about the combined effect of LIPUS and BCP on bone formation. Methods: The combined effect of LIPUS and BCP was studied in a beagle model. Twelve dogs were used. BCP granules without any additions were implanted into bilateral erector spinae muscles. One side is the BCP group, while the counterlateral side is LIPUS + BCP group. Histological and histomorphometric analyses, and quantitative real-time polymerase chain reaction were evaluated. Results: Compared with BCP alone, the LIPUS + BCP showed no advantages in early bone formation. Furthermore, the Notch signaling pathway-related mRNA has no significant difference between the two groups. Conclusions: The preliminary results showed that the BCP, which has intrinsic osteoinduction nature, was an effective and promising material. However, LIPUS has no enhanced effect in BCP induced ectopic bone formation. Furthermore, LIPUS has no effect on the Notch signaling pathway. Whether costly LIPUS could be used in combination with BCP should be a rethink.

Olfactory stimulus as environmental enrichment for shelter dogs: a pilot study / Estímulo olfativo como enriquecimento ambiental para cães de abrigo: um estudo piloto

Environmental enrichment techniques include olfactory stimuli for improving animal welfare. This study aimed to analyze the reactions of 41 shelter dogs exposed to odorous stimuli, such as the method used in another study on wild canids. The focal animal method analyzed the dogs' reactions, with all behaviors recorded. Behavioral responses were classified as positive (P+), negative (N-), or other (Ot). Independent variables were all dogs and the size of the packs. The behavior between the basal (without stimulus), exposure, and after-stimulus withdrawal was analyzed. For all dogs, olfactory stimuli significantly increased P+ (P=0.001) and N- (P=0.004), contrasting with the decrement of Ot behaviors (P=0.001) from the basal to the exposure phase. After the withdrawal of the stimuli, P+, N-, and Ot behaviors returned to basal levels (P>0.05). There were no significant differences (P>0.05) in the conduct of small or large packs exposed to stimuli. Dogs are sensitive to olfactory stimuli, but arousal is generalized to P+ and N-. It is undesirable to an N- increase for improvement of animal welfare. Contrary to what was observed in a study with wild canids, the method failed in shelter dogs because N- was increased. The introduction of sudden novelty (olfactory stimulus) in an impoverished shelter environment may have caused excitement in the dogs. It is suggested that changes in the method, such as stimuli exposition to each dog in an isolated room, are necessary to increase sheltered dog well-being.(AU)

As técnicas de enriquecimento ambiental incluem estímulos olfativos para aumentar o bem-estar animal. O objetivo deste estudo foi analisar as reações de 41 cães de abrigo expostos a estímulos odoríferos, como o método utilizado em outro estudo com canídeos selvagens. As reações dos cães foram analisadas pelo método animal focal, com todos os comportamentos registrados. As respostas comportamentais foram classificadas como positivas (P+), negativas (N-) ou outras (Ot). As variáveis independentes foram todos os cães e o tamanho das matilhas. Foi analisado o comportamento entre o basal (sem estímulo), exposição e após a retirada do estímulo. Para todos os cães, os estímulos olfativos aumentaram significativamente P+ (P=0,001) e N- (P=0,004), contrastando com a diminuição dos comportamentos Ot (P=0,001) da fase basal para a de exposição. Após a retirada dos estímulos, os comportamentos P+, N- e Ot retornaram aos níveis basais (P>0,05). Não houve diferenças significativas (P>0,05) no comportamento de matilhas pequenas ou grandes expostas a estímulos. Os cães são sensíveis a estímulos olfativos, mas a excitação parece ser generalizada para ambos, P+ e N-. É indesejável um aumento de N- para melhoria do bem-estar animal. Ao contrário do que foi observado em um estudo com canídeos selvagens, o método falhou em abrigar cães porque o N- foi aumentado. A introdução de uma novidade repentina (estímulo olfativo) em um ambiente de abrigo empobrecido, pode ter causado excitação exagerada nos cães. Sugere-se alterações no método, como a exposição de estímulos a cada cão em uma sala isolada necessária para aumentar o bem-estar do cão abrigado.(AU)

Review on trypanosomiasis and their prevalence in some country on the Red Sea / Avaliação da tripanossomíase e sua prevalência em alguns países do mar Vermelho

Abstract Trypanosomiasis is a protozoan infection affecting both human and animals in almost all parts of the world. It can affect a very large range of domestic and wild hosts including camelids, equines, cattle, buffaloes, sheep, goats, pigs, dogs and other carnivores, deer, gazelles and elephants. This review paper was designed to address the effect of this economically important disease in countries on the Red Sea, especially in Egypt, Sudan, Somalia, and Saudi Arabia during the period 2010 to 2020. The prevalence of trypanosomiasis is different between these countries due to different types of diagnostic methods (Giemsa-stained blood smears, Hematocrit centrifugation, Serological test, and molecular analysis PCR) used and differential distribution of vector (Tse tse) flies. In current review, retrospective studies of published literature on distribution and prevalence of Trypanosoma evansi infection in the Red Sea Countries was conducted [Google Scholar and PubMed were used to retrieve the published literature from 2000-2020. A total of 77 published articles met the eligibility criteria and were reviewed. A total of 16 reports have been reported on the prevalence and distribution of Trypnosoma evansi infection in the Red Sea Countries have been from 2010-2020]. According to the published literature, we can say that trypanosomiasis in camels are more prevalent in Sudan than in other countries, followed by 17% and 51.78% in both clinical and non-clinical cases. Hence, the reliable diagnostic tests should be used for rapid treatment or control of the disease as if not treated appropriately in early-stage, can lead to death of the camels.

Resumo A tripanossomíase é uma infecção por protozoário que afeta humanos e animais em quase todas as partes do mundo. Pode afetar grande variedade de hospedeiros domésticos e selvagens, incluindo camelídeos, equinos, gado, búfalos, ovelhas, cabras, porcos, cães e outros carnívoros, veados, gazelas e elefantes. Este artigo de revisão foi elaborado para abordar o efeito dessa doença economicamente importante em países do mar Vermelho, especialmente Egito, Sudão, Somália e Arábia Saudita, durante o período de 2010 a 2020. A prevalência de tripanossomíase é diferente entre esses países devido a tipos distintos de métodos diagnósticos (esfregaços de sangue corados com Giemsa, centrifugação de hematócrito, teste sorológico e PCR de análise molecular) usados ​​e distribuição diferencial de moscas vetoras (tsé-tsé). Na revisão atual, foram realizados estudos retrospectivos da literatura publicada sobre distribuição e prevalência da infecção por Trypanosoma evansi nos países do mar Vermelho [Google Scholar e PubMed foram usados ​​para recuperar a literatura publicada de 2000 a 2020. Um total de 77 artigos publicados preencheu os critérios de elegibilidade e foi revisado. E há também 16 relatos sobre a prevalência e distribuição da infecção por Trypnosoma evansi nos países do mar Vermelho, de 2010 a 2020]. De acordo com a literatura publicada, podemos afirmar que a tripanossomíase em camelos é mais prevalente no Sudão do que em outros países, seguida por 17% e 51,78% em casos clínicos e não clínicos. Assim, os testes diagnósticos confiáveis ​​devem ser utilizados para o tratamento rápido ou controle da doença, pois, se eles não forem tratados de forma adequada na fase inicial, isso pode levar à morte dos camelos.

Feral dogs in Chitral gol national park, Pakistan: a potential threat to the future of threatened Kashmir Markhor (Capra falconeri cashmiriensis) / Cães ferozes no parque nacional Chitral gol, Paquistão: uma ameaça potencial para o futuro do Markhor da Caxemira ameaçado (Capra falconeri cashmiriensis)

Abstract Feral dogs are well-organized hunters of ungulates in many parts of the world, causing great damage to wildlife populations and ultimately to the ecosystem. In Pakistan, the impacts of feral dogs on the wildlife have not been documented yet. In a period of fifteen years (2006-2020), feral dogs have killed hundreds of threatened markhor in Chitral gol national park (CGNP), Pakistan. Despite direct predation other impacts including disturbance and competition with other natural predators, could compromise conservation and management efforts. The population of feral dogs seems to have been increased with the increase of dumping sites by communities. Our findings suggest that there are pressing needs of controlling the feral dogs population and eradicating them from the core zone of CGNP and surrounding buffer communities. Conventional culling of dogs should be coupled with modern techniques like castration and sterilization. Communities should be educated regarding the clean environment, proper disposal of home wastes and, biodiversity conservation.

Resumo Os cães ferozes são caçadores bem organizados de ungulados em muitas partes do mundo, causando grandes danos à população de animais selvagens e, em última instância, ao ecossistema. No Paquistão, os impactos dos cães selvagens na vida selvagem ainda não foram documentados. Em um período de 15 anos (2006-2020), cães selvagens mataram centenas de markhor ameaçados no parque nacional Chitral gol (CGNP), Paquistão. Apesar da predação direta, outros impactos, incluindo distúrbios e competições com outros predadores naturais podem comprometer os esforços de conservação e manejo. A população de cães selvagens parece ter aumentado com o aumento dos locais de despejo pelas comunidades. Nossas descobertas sugerem que há necessidades urgentes para controlar a população de cães selvagens e erradicá-los da zona central do CGNP e das comunidades-tampão vizinhas. O abate convencional de cães deve ser combinado com técnicas modernas como castração e esterilização. As comunidades devem ser educadas sobre o meio ambiente limpo, o descarte adequado de resíduos domésticos e a conservação da biodiversidade.

Dogs naturally infected by Rangelia vitalii, Babesia canis vogeli, and Ehrlichia canis in São Paulo, Brazil / Cães naturalmente infectados por Rangelia vitalii, Babesia canis vogeli, e Ehrlichia canis em São Paulo, Brasil

Several agents can cause hemoparasitic diseases in dogs, and blood-sucking arthropods transmit these diseases. These agents can cause several clinical manifestations and, in some cases, can kill the host. Because these agents are essential in animal health, this study aims to detect the frequency of Ehrlichia canis, Rickettsia rickettsii, Anaplasma platys, and Rangelia vitalii by real-time PCR and Babesia vogeli in dogs in the southern region of the city of São Paulo, São Paulo. Of the 98 dog samples, 18 (18.4%) tested positive with real-time polymerase chain reaction for at least one studied agent. Of these 18 samples, 17 tested positive for a single agent (11.2% for B. canis vogeli, 1.02% for R. vitalii, and 5.1% for E. canis), and one showed co-infection with B. canis vogeli and R. vitalii. The results demonstrate the presence of hemoparasites in the studied animals, which can influence the quality and life expectancy of these animals. The Rangeliadetection warns small animal clinicians to include it as a differential diagnosis for hemoparasitosis.(AU)

As hemoparasitoses em cães podem ser causadas por diversos agentes, sendo essas doenças transmitidas por artrópodes hematófagos. Esses agentes podem causar diversas manifestações clínicas e, em alguns casos, podem matar o hospedeiro. Este estudo teve como objetivo detectar por PCR em tempo real a frequência de Ehrlichia canis, Rickettsia rickettsii, Anaplasma platys, Rangelia vitalii e Babesia canis vogeli em amostras de cães da zona sul da cidade de São Paulo, Brasil. Das 98 amostras de cães, 18 (18,4%) testaram positivo com reação em cadeia da polimerase em tempo real para pelo menos um agente estudado. Destas 18 amostras, 17 testaram positivo para um único agente (11,2% para B. canis vogeli, 1,02% para R. vitalii e 5,1% para E. canis), e uma apresentou coinfecção com B. canis vogeli e R. vitalii. Os resultados demonstram a presença de hemoparasitas nos animais estudados, o que pode influenciar a qualidade e a expectativa de vida desses animais. Além disso, é o primeiro relato da detecção de R. vitalli na zona sul de São Paulo e serve de alerta para os clínicos de pequenos animais incluírem esse agente como diagnóstico diferencial para as hemoparasitoses.(AU)

Electrocardiographic changes and changes in cardiac lactate and troponin I levels associated with search and rescue physical activity in military dogs / Alterações eletrocardiográficas e nos níveis de lactato e troponina I cardíaca associadas à atividade física de busca e salvamento em cães militares

Rescue and recovery dogs intercalate the activity intensity developed, which also triggers significant metabolic changes in cardiac physiology. Thus, we evaluated the changes that search simulation causes in glucose, lactate, and cardiac troponin I level (cTnI) and the electrocardiographic and heart rate during the activity and recovery phase to predict the physiological adaptation to the exercise. Five healthy adult dogs from the Rescue and Recovery Service of Military Firefighters Corps were submitted to 60 minutes search operation simulation in the woods. They covered a forest area of approximately 50,000 m2. The dogs were loose and accompanied by their driver, and they could perform any physical activity. Were evaluated serum biochemical analysis of glucose, lactate, cardiac troponin I, electrocardiographic, and heart rate (rest, exercise phase, and recovery time). No changes in glucose levels, heart rate, and cardiac rhythm were detected. In comparison to baseline values, there is an increase: in lactate at the end of the exercise phase [EXER] (60'EXER), and in the recovery phase [RCT] at 30'RCT and 60'RCT, and cTnI at 60'RCT, 120'RCT, and 4hRCT. P wave duration was significantly higher at 60'EXER, 15'RCT, and 30'RCT, with no alterations in wave amplitude. QRS interval duration significantly increased at 30'RCT, and the ST segment presented a significant difference at 60'EXER, 15'RCT, and 60'RCT compared to the rest moment. The moderate alterations in lactate and cTnI and few alterations in the electrocardiographic and heart rate maintenance suggest the adaptation of rescue and recovery dogs to the type, intensity, and duration of search operation simulation performed.(AU)

Cães de busca e resgate intercalam a intensidade da atividade desenvolvida que desencadeia alterações metabólicas significativas, bem como na fisiologia cardíaca. Assim, foram avaliadas as alterações que a simulação de busca produz nos níveis de glicose, lactato, troponina I cardíaca (cTnI), bem como na frequência cardíaca e atividade eletrocardiográfica durante a fase de atividade e recuperação, a fim de predizer a adaptação fisiológica ao exercício. Cinco cães adultos saudáveis do Serviço de Resgate e Salvamento do Corpo de Bombeiros Militares foram submetidos à simulação de operação de busca de 60 minutos na mata e cobriram uma área florestal de aproximadamente 50.000 m2. Os cães estavam soltos, acompanhados pelo condutor e estavam livres para realizar qualquer tipo de atividade física. Foram avaliados os níveis séricos de glicose, lactato e troponina I cardíaca, atividade eletrocardiográfica e frequência cardíaca em repouso, na fase de exercício e no tempo de recuperação. Não foram detectadas alterações nos níveis de glicose, frequência cardíaca e ritmo cardíaco. Em comparação com os valores basais houve aumento de lactato ao final da fase de exercício [EXER] (60'EXER) e na fase de recuperação [RCT] aos 30'RCT e 60'RCT; e cTnI aos 60'RCT, 120'RCT e 4hRCT. Duração da onda P foi significativamente maior em 60'EXER, 15'RCT e 30'RCT, sem alterações na amplitude da onda. Duração do intervalo QRS teve aumento significativo em 30'RCT e o segmento ST apresentou diferença significativa em 60'EXER, 15'RCT e 60'RCT quando comparado ao basal. As alterações moderadas nos níveis de lactato e cTnI, bem como a pouca alteração na atividade eletrocardiográfica e manutenção da frequência cardíaca sugerem boa adaptação dos cães de busca e resgate ao tipo, intensidade e duração da operação de busca simulada realizada.(AU)