Daniel de Souza Ramos Angrimani

Atualmente há diversas evoluções metodológicas de ensino. Assim, os cursos de Medicina Veterinária devem se adequar a formação curricular, tanto para o âmbito acadêmico quanto para preparação profissional, buscando novas possibilidades de ensino-aprendizagem centralizadas no discente, inclusive quando comparada a produtividade entre o período matutino e noturno. Com este propósito, foi desenvolvido um questionário, respondido de forma voluntária pelos alunos do curso de Medicina Veterinária, buscando analisar a importância e as dificuldades apresentadas por estes na disciplina de Biotecnologia da Reprodução Animal entre os períodos matutino e noturno. O questionário foi baseado no método observacional descritivo transversal, para coleta de dados foi utilizada a ferramenta online Google Formulários, possibilitando analisar limitações individuais, potenciais, experiências e expectativas sobre o conhecimento acadêmico entre os discentes. Concomitantemente, o questionário avaliou a realidade socioeconômica e cultural dos discentes. Através dos resultados foi possível concluir que alunos do período noturno, devido à realização de outras atividades durante o dia e fatores relacionados com a rotina apresentam maior estresse e cansaço. Tais fatores influenciam diretamente no desgaste físico, psicológico e emocional dos discentes, do período noturno. Assim sendo, alunos de Medicina Veterinária do período noturno, na disciplina de Biotecnologia da Reprodução Animal, apresentam maiores dificuldades de assimilar conteúdo quando comparados aos alunos do período matutino.

Introdução: O parto de cadelas e gatas deve ocorrer de forma natural, no entanto, os animais estão suscetíveis a distocias, de origem fetal ou materna. Neste contexto, a cesariana é método rotineiro e aplicado na rotina clínica de pequenos animais e é considerada solução confiável para evitar ou corrigir distocias. Assim, a cesariana pode ser dividida em emergencial ou eletiva. Objetivos: Desta forma, esse estudo possui como objetivo discorrer sobre as principais diferenças entre a cesariana eletiva e emergencial em cadelas e gatas, para contribuir com sua utilização na rotina de clínica e cirurgia veterinária. Resultados: A cesariana de emergência, como o próprio nome remete, é indicada para casos emergenciais, quando, por exemplo, o animal apresenta contrações há mais de 4 horas e não há nascimento dos filhotes. Ainda, é considerada emergência obstétrica quando ocorrem intervalos muito longos entre filhotes, sendo este maior que 2 horas. Por outro lado, a cesariana eletiva requer planejamento, sendo indicada em raças de cães braquicefálicas, quando há histórico prévio de distocia e fraturas de pelve. Além disso, situações como, falha na estática fetal, tamanho exagerado dos fetos, fêmeas muito jovens ou senis, hidrocefalia e anasarca são fatores indicativos para tal método cirúrgico. Neste sentido, obtém-se sucesso ao evitar o sofrimento do neonato e a fadiga da fêmea em trabalho de parto. Conclusão: Quando efetuados de maneira correta, bem como, por meio do acompanhamento ao longo da gestação, ambos os tipos de cesariana são cirurgias seguras e eficientes em pequenos animais. Sendo que o prognóstico para a fêmea e prole é favorável.

A espécie suína nos últimos anos vem sendo espécie de escolha como companhia doméstica. Na Medicina Veterinária conhecemos o crescimento da suinocultura e as melhorias necessárias para o aumento da exportação. Melhorias na alimentação, melhoramento genético, no manejo e procedimentos cirúrgicos em machos. Pensando na domesticação desses animais e manutenção da saúde dessa espécie animal, além do manejo alimentar, se faz necessário novos estudos para a melhor adaptação desses animais e também o controle da reprodução em ambientes domésticos sem o interesse econômico da espécie. O procedimento cirúrgico para o controle da reprodução de fêmeas é a retirada dos ovários (ovariectomia) e poucos estudos foram descritos, tanto sobre o procedimento, quanto estudos comparativos para o melhor procedimento cirúrgico. A Ovariossalpingohisterectomia é um dos procedimentos cirúrgicos eletivos mais realizados na rotina veterinária de pequenos animais, sendo um meio eficaz no controle populacional e de prevenção de doenças. Devido à ausência de descrição da técnica cirúrgica em animais de produção, o presente trabalho relata o procedimento de Ovariossalpingohisterectomia realizado em leitoa (Sus scrofa domesticus) de aproximadamente quatro meses de idade, submetida a anestesia geral, com a avaliação pressórica e a hemogasometria, garantindo indicadores de bem estar animal e controle dos parâmetros vitais durante todo o procedimento, podendo ser alternativa para abordagens cirúrgicas de animais da espécie suína de companhia doméstica, conhecidos como minipig.

Ureteral ectopy is a rare disorder in the small animals’ clinic. It is characterized as a congenital anomaly, resulting from the ducts differentiation failure during embryogenesis. In this scenario, the ureters present themselves outside the anatomical site, being inserted into the uterus, urethra, urinary vesicle neck, or vagina. The clinical signs are urinary incontinence and perivulvar dermatitis. Surgery is the accepted treatment to correct the anomaly. The surgical procedure is based on relocating the ectopic ureter and treating associated modifications. This report describes a case of intramural bilateral ureteral ectopy, corrected surgically through the neoureterocystostomy technique, making it possible to control the animal’s urinary incontinence.

As a consequence of a hormonal imbalance, Prostatic Hyperplasia (PH) is characterized by increased prostate volume, along with higher local angiogenesis and vascularization. Orchiectomy is the common treatment for dogs, however it is not an option for breeding animals. Thus, finasteride arises as the drug of choice for stud dogs. Therefore, the aim of this study was to evaluate the effects of orchiectomy or finasteride therapies on hormonal and vascular dynamics of PH dogs. Fifteen dogs, aged 6–13 years were assigned to: Untreated Group (dogs diagnosed with PH—n = 5), Finasteride treated group (PH dogs treated with finasteride—n = 5) and Orchiectomy treated group (PH dogs submitted to orchiectomy–n = 5). Evaluations were performed in a monthly interval (first day of treatment; after 30 and 60 days). Doppler ultrasonography was performed to measure prostatic volume, vascularization and hemodynamic profile of prostatic artery. Dihydrotestosterone, estrogen and testosterone concentrations were measured. At day 60, prostatic biopsy was performed for histological, immunohistochemical and qPCR analysis for VEGF-A expression. At day 60, vascularization score was higher in untreated compared to treated groups (finasteride and orchiectomy). Furthermore, VEGF-A expression was lower in the Orchiectomy Treated Group, but VEGF-A was immunohistochemically lower in both treated groups (finasteride and orchiectomy) compared to the Untreated Group. The efficiency of finasteride treatment in reducing clinical signs, prostate volume and vascularization appears to be similar to orchiectomy. In conclusion, both PH medical and surgical therapy lead to reduction in prostate dimension and VEGF-A expression and, consequently, lower local vascularization. However, orchiectomy promotes marked hormonal changes, which ultimately lead to prostate atrophy.

Stenella clymene is an endemic species of dolphin living in tropical regions in the Atlantic Ocean. Despite its wide distribution, there is still scarce information on Stenella clymene, including its reproductive biology. In this context, this work describes the morphology of the whole male reproductive tract of the Clymene dolphin. Five males (N = 5) were studied after stranding on the northeast coast of Brazil. The analysis was performed through the use of macroscopic techniques and light and scanning microscopy. The male reproductive system consists of large testes wrapped around the tunica albuginea and adhered to the epididymis; the testes are attached to the abdominal cavity by the mesorchium. The ductus deferens is convoluted in the proximal portion and rectilinear in the distal portion. The prostate was the only accessory gland found, which is submerged by the prostate compressor muscle and lined with a dense fibroelastic capsule. The penis is classified as fibroelastic, with a spiral sigmoid flexure associated with a large volume of muscle tissue. The penis is inserted into two vestigial bones or pelvic bones, which exhibit no connection with the spine. In conclusion, the macro‐ and microscopic conformation and other morphofunctional features of the male reproductive organs of Stenella clymene are in accord with the anatomy observed in other Cetartiodactyla.

Uterine intussusception is a rare condition in bitches. This study aimed to report an unusual case of prolapsed uterine intussusception in a female dog. A 2-year-old American Bully bitch was received with labor history of large fetus requiring manual traction. The animal presented mucosal prolapse through the vulva, unproductive contractions and abdominal discomfort. After partial correction of mucosal prolapse, the dog was referred to ovary-hysterectomy surgery to correct prolapsed mucosa. During the surgical procedure, surgeons observed that the uterine horns were invaginated into the uterine body, rotated, and the tissue was slightly devitalized and congested. As previously described, this condition occurred during the immediate postpartum period. Thus, we suggest that this period can be a facilitator for the establishment of uterine intussusception.

Pontoporia blainvilleior Franciscana is a small cetacean endemic of South Atlantic Ocean and its highlighted as the most endangered species. Despite the necessity to development conservation strategies forPontoporia blainvilleistudies aiming to feature the reproductive biology and morphological characteristics of the genital organs are still scarce. In this context, the aim of this study was describe the morphological aspects of the genital organs ofPontoporia blainvillei. For this purpose, six male specimens ofP. blainvilleistranded on the southeast region of Brazil, were used. Initially animals were measured, and the genital organs were collected, dissected and photodocumented. Then, fragments of all collected organs were submitted to microscopic analysis. The male genital organs ofP. blainvilleishowed similar results described for other cetaceans, such as, topography in abdominal cavity, presence of two testicles with epididymis, fibroelastic penis with sigmoid shape and presence of deferent duct. Moreover, a male uterus non-functional, two vestigial bones that support the penis, one retractor penis muscle and presence of associated muscles that support the entire reproductive apparatus were observed. However, some differences were present, such as, a simple cubic epithelium in the light of the epididymis, a small testicle even in sexually mature animals and absence of prostate, not previously observed in other cetaceans. Therefore, the animals analyzed showed similar features to other cetaceans, however some peculiarities were observed.

Wild African Lion Panthera leo populations are decreasing due to inbreeding and reduced genetic variability. Thus, the use of assisted reproduction in the species could one day become essential. Before this is possible, however, studies need to be conducted on the basic reproductive traits of the species, especially those regarding sperm cells. This study aimed to analyze the semen of African Lions in field conditions. We included seven captive African Lions in our study. The animals were chemically restrained and electro-ejaculated. Twenty sperm samples were selected and analyzed for sperm motility and progressive motility, sperm motility index, and sperm morphology. In addition, the samples were analyzed for membrane and acrosome integrity (hypoosmotic swelling test and fast green/rose Bengal dyes, respectively) and assessed for cytochemical activity of the mitochondria. We found that sperm motility rate was 75.25%±2.03, progressive motility rate was 3.25%±0.10, and sperm motility index was 70.12%±1.71. We found morphologic abnormalities roughly at the expected rate with 34.61%±7.22 of the sperm cells having an intact plasma membrane and acrosome integrity of 92.27%±2.73; high mitochondrial activity was 54.26±4.88% and absence of mitochondrial activity was 2.72±0.68% in the sperm cells. These findings show that conventional tests for sperm motility and sperm morphology bring about the expected results for lions according scientific literature. Though a hypoosmotic swelling test may be performed using different concentrations, it might lead to a higher number of sperm cells with membrane damage. Fast green/rose Bengal stain and 3’3 diaminobenzidine assay, however, can be used in sperm analysis of lions in field conditions.

Summary: The cryopreservation of epididymal sperm is an important technique that allows genetic material to be preserved, even post mortem. However, cryopreservation leads to increased oxidative stress and impaired sperm viability. Polyunsaturated fatty acid (PUFA) supplementation may improve certain sperm characteristics, but it also makes sperm more susceptible to oxidative stress, therefore adding antioxidants that counteract oxidative stress has become an option. In this context, this study aimed to evaluate the effect of the interaction between docosahexaenoic acid (DHA) and antioxidants on the quality after the cryopreservation of epididymal bull sperm. Twenty epididymides were collected after slaughter, and epididymal sperm was cryopreserved with bovine extender supplemented with docosahexaenoic acid (DHA), glutathione peroxidase (GPx) and superoxide dismutase (SOD). We verified an improvement in motility in the group that was treated only with DHA 5 µM and a concentration-dependent effect on susceptibility to lipid peroxidation that was associated with DHA concentration (1 µM, 5 µM or 10 µM). Moreover, treatment with DHA (5 µM) and SOD (20 IU/ml) resulted in higher sperm motility. Thus, the association between DHA (5 µM) and SOD (20 IU/ml) appears to be an option for increased epididymal sperm features in bulls.