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Front Vet Sci ; 11: 1287872, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38328261


The giant anteater (Myrmecophaga tridactyla) is a vulnerable species in South America and is considered endangered or near extinction in Central America. Therefore, studies describing the reproductive characteristics of this species are pivotal for its conservation. Thus, this study aimed to provide a morphological description of the female reproductive tissues of this species. We collected tissue samples from six female giant anteaters and performed gross, morphological, and histochemical analyses. Five adult subjects and one juvenile were included in the study. In the ovary, classifications were made according to the follicle and oocyte sizes: primordial, primary, secondary, early antral, or antral. Typical follicles with a single oocyte surrounded by a simple or stratified layer of cubic epithelium, atretic follicles, corpora lutea, corpora albicans, and ovarian cysts were also observed. No ovarian lesions were observed. By contrast, endometritis, metritis, mucometra, and endometrial cysts were identified in the uterus. Uterine alterations in these subjects were frequent and could affect reproduction.

J Equine Vet Sci ; 130: 104912, 2023 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-37643695


The clinical findings of pleural empyema in six horses were retrospectively studied using epidemiological, clinical pathology, microbiological, ultrasound, and post-mortem data. The clinical findings included tachycardia (n = 3/6), tachypnea (n = 6/6), cyanotic mucosa (n = 2/6), hyperthermia (n = 4/6), inspiratory or mixed dyspnea (n = 6/6), presence of fluid and/or pleural rubbing (n = 2/6) and coarse crackling on auscultation (n = 4/6). Horses demonstrated leukocytosis (16.22 × 103/µL) with neutrophilia (12.32 × 103/µL) and hyperfibrinogenemia (633.33 mg/dL) and an increase in urea (69.80 mg/kg) and globulins (5.22 g/dL). The pleural fluid exhibited exudate (n = 5/6). The pathogens isolated from transtracheal wash (TTW) and/or pleural effusion included Aspergillus fumigatus, Enterobacter cloacae, alpha and beta hemolytic Streptococcus, Pseudomonas aeruginosa, Salmonella sp., Streptococcus equi subsp. zooepidemicus, and beta hemolytic Staphylococcus. The in vitro tests of microbial sensitivity of the isolates revealed that ceftiofur (5/6) and penicillin (3/6) were the most effective drugs. The fatality rate was 83% (5/6). The main post-mortem finding was the presence of fibrin in the pleural cavity with adhesion between the parietal and visceral pleura. These results show that pleural empyema is a complex disease pathophysiology that is refractory to conventional treatment.

Braz J Vet Med ; 45: e000123, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37146075


The canine transmissible venereal tumor is type of transmissible cancer that occurs naturally through allogenic cellular transplants. Commonly diagnosed in the genital area of sexually active dogs, the tumor typically responds well to vincristine sulfate chemotherapy, although there are cases of resistance to the drug correlated with the tumoral phenotype. We describe herein a case of fibrosis in an area affected by the tumor in a dog after vincristine chemotherapeutic treatment that was associated with an idiosyncratic reaction to the drug.

O tumor venéreo transmissível canino é um tipo de câncer transmissível que ocorre naturalmente através do transplante celular alogênico. Comumente diagnosticado na área genital de cães sexualmente ativos, o tumor normalmente responde bem à quimioterapia com sulfato de vincristina, embora existam casos de resistência à droga correlacionados com o fenótipo tumoral. Descrevemos neste relato de caso um cão com fibrose na área acometida pelo tumor após o tratamento quimioterápico com vincristina associado a uma reação idiossincrática à droga.

Vet Med Sci ; 8(6): 2297-2306, 2022 11.
Artigo em Inglês | MEDLINE | ID: mdl-36098244


BACKGROUND: Several studies have attempted to characterise the origin of canine transmissible venereal tumour (CTVT). However, the participation of cancer stem cells (CSC) has not been reported OBJECTIVES: Herein we describe the expression patterns of CSC markers CD44, CD34, CD90 and CD133 in CTVT METHODS: Thirty-eight samples were selected and assessed through flow cytometry and immunohistochemistry RESULTS AND CONCLUSIONS: Twenty-two tumours were classified as plasmacytoid and 16 as mixed. Almost all tumours showed high CD44 and low CD34 levels. CD133 and CD90 expression varied among tumours. Cytological groups did not differ in the proportion of CSC markers. Our results suggest that CSC subpopulations might participate in CTVT.

Doenças do Cão , Neoplasias , Tumores Venéreos Veterinários , Cães , Animais , Doenças do Cão/metabolismo , Neoplasias/veterinária , Imuno-Histoquímica , Células-Tronco Neoplásicas/metabolismo , Células-Tronco Neoplásicas/patologia
Res Vet Sci ; 145: 193-204, 2022 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-35240476


The canine transmissible venereal tumor (CTVT) is a transplantable cancer with the ability evade the immune system, despite strict immune surveillance of the host; in this context, the relationship between inflammatory infiltrate and CTVT prognosis is not entirely understood. Natural canine transmissible venereal tumors of 22 dogs were evaluated for tumor/host interaction through clinical and epidemiological data, cyto-histopathological and cytogenetic findings and, mainly, cell-mediated immune response. We performed analysis on dogs with naturally acquired disease to provide information from the study of CTVT biology in its natural course, as the clinical evolution of the natural tumor in the host is not yet as well known as in the laboratory. Populations for T cell labeling (CD3+ CD4+ CD8+), B cells, NK cells, and macrophages were analyzed by flow cytometry in blood and tumor samples and expressions of MHC class I and class II molecules were quantified by immunohistochemistry and compared mainly between the phases of progression and regression in the natural CTVT. Dogs were also treated with vincristine sulfate and evaluated for chemotherapeutic response. Chemotherapy was effective in 88% of cases and there was no recurrence of the disease 12 months after the cure. Tumor cells displayed a numerical chromosomal variation between 54 and 72, not correlating with the host genotype. Although a greater expression of MHC molecules [18.6 ± 5.8% class I (P < 0.004) and 38.5 ± 6.5% class II (P < 0.003)] was observed in the regression phase, no significant effect was observed between the clinical phase of the tumor and cellular immune response in the analysis by flow cytometry (P > 0.05). We also found no correlation between cytological subtype of the tumor (plasmacytoid, lymphocytoid and mixed) and cellular immune response, suggesting that there is no difference in tumor immunogenicity. Here, we found no immunological evidence to support the theory of the immune-induced complete spontaneous regression in CTVT.

Doenças do Cão , Tumores Venéreos Veterinários , Animais , Doenças do Cão/genética , Cães , Citometria de Fluxo/veterinária , Imunidade Celular , Macrófagos , Tumores Venéreos Veterinários/patologia
Rev Esc Enferm USP ; 55: e20200527, 2021.
Artigo em Inglês, Português | MEDLINE | ID: mdl-34591064


OBJECTIVE: To analyze wound contraction and histomorphometric pattern of lesions in Wistar rats undergoing doxorubicin extravasation. METHOD: Sixty adult female rats were used, divided into four groups of fifteen animals: Group 1 (Control, without antidote); Group 2 (Hyaluronidase); Group 3 (Photobiomodulation), and Group 4 (Hyaluronidase + Photobiomodulation). Doxorubicin 1mg (0.5 ml) was applied subcutaneously on the animals' back, inducing the wound. Macroscopic and morphometric evaluation of the lesions was performed every two days for 28 days. On the 30th day, euthanasia was performed and the material was collected for histological evaluation. RESULTS: The animals in the photobiomodulation and photobiomodulation + Hyaluronidase groups presented regeneration tissue with neovascularization and acute inflammation, with improvement in wound healing, which did not occur in the other groups. The contraction rates were better in those treated with photobiomodulation and photobiomodulation + Hyaluronidase, with healing percentages of 76.6% and 72.1%, respectively. CONCLUSION: The combination of photobiomodulation (660 nm-1 J) with topical hyaluronidase (65 UTR) proved to be effective in the process of wound healing due to extravasation of doxorubicin, and can be incorporated into the practice of clinical oncology.

Terapia com Luz de Baixa Intensidade , Animais , Doxorrubicina , Feminino , Ratos , Ratos Wistar , Cicatrização
Rev. Esc. Enferm. USP ; 55: e20200527, 2021. tab, graf
Artigo em Inglês, Português | LILACS, BDENF - Enfermagem | ID: biblio-1340713


ABSTRACT Objective: To analyze wound contraction and histomorphometric pattern of lesions in Wistar rats undergoing doxorubicin extravasation. Method: Sixty adult female rats were used, divided into four groups of fifteen animals: Group 1 (Control, without antidote); Group 2 (Hyaluronidase); Group 3 (Photobiomodulation), and Group 4 (Hyaluronidase + Photobiomodulation). Doxorubicin 1mg (0.5 ml) was applied subcutaneously on the animals' back, inducing the wound. Macroscopic and morphometric evaluation of the lesions was performed every two days for 28 days. On the 30th day, euthanasia was performed and the material was collected for histological evaluation. Results: The animals in the photobiomodulation and photobiomodulation + Hyaluronidase groups presented regeneration tissue with neovascularization and acute inflammation, with improvement in wound healing, which did not occur in the other groups. The contraction rates were better in those treated with photobiomodulation and photobiomodulation + Hyaluronidase, with healing percentages of 76.6% and 72.1%, respectively. Conclusion: The combination of photobiomodulation (660 nm-1 J) with topical hyaluronidase (65 UTR) proved to be effective in the process of wound healing due to extravasation of doxorubicin, and can be incorporated into the practice of clinical oncology.

RESUMEN Objetivo: Analizar la contracción de heridas y patrón histomorfométrico de las lesiones en ratones Wistar sometidos a la extravasación de doxorrubicina. Método: Fueron utilizadas 60 ratas adultas, divididas en cuatro grupos de quince animales: Grupo 1 (Control sin antídoto); Grupo 2 (Hialuronidasa); Grupo 3 (Fotobiomodulación) y Grupo 4 (Hialuronidasa + Fotobiomodulación). Se aplicó 1 mg (0,5 ml) de doxorrubicina en el subcutáneo del dorso de los animales, induciendo la herida. Realizada evaluación macroscópica y morfométrica de las lesiones cada dos días por 28 días. En el 30° día se realizó la eutanasia y recolección del material para evaluación histológica. Resultados: Los animales de los grupos fotobiomodulación y fotobiomodulación+ Hialuronidasa presentaron tejido de regeneración con neovascularización e inflamación aguda, con mejoría de la cicatrización de las heridas, lo que no ocurrió en otros grupos. Las tasas de contracción fueron mejores en los tratados con fotobiomodulación y fotobiomodulación + Hialuronidasa, con porcentaje de cicatrización de 76,6% y 72,1%, respectivamente. Conclusión: la combinación de la fotobiomodulación (660nm-1J) con hialuronidasa tópica (65 UTR) demostró ser más eficaz en el proceso de cicatrización de heridas por extravasación de doxorrubicina, lo que posibilitó adoptarla en la práctica de la oncología clínica.

RESUMO Objetivo: Analisar a contração de feridas e padrão histomorfométrico das lesões em ratos Wistar submetidos ao extravasamento de doxorrubicina. Método: Utilizados 60 ratos fêmeas adultos, divididos em quatro grupos de quinze animais: Grupo 1 (Controle, sem antídoto); Grupo 2 (Hialuronidase); Grupo 3 (Fotobiomodulação) e Grupo 4 (Hialuronidase + Fotobiomodulação). Aplicado 1 mg (0,5 ml) de doxorrubicina no subcutâneo do dorso dos animais, induzindo a ferida. Realizada avaliação macroscópica e morfométrica das lesões a cada dois dias por 28 dias. No 30º dia foi realizada a eutanásia e coleta do material para avaliação histológica. Resultados: Os animais dos grupos fotobiomodulação e fotobiomodulação+Hialuronidase apresentaram tecido de regeneração com neovascularização e inflamação aguda, com melhora na cicatrização das feridas, o que não ocorreu nos outros grupos. As taxas de contração foram melhores nos tratados com fotobiomodulação e fotobiomodulação + Hialuronidase, com percentual de cicatrização de 76,6% e 72,1%, respectivamente. Conclusão: A combinação da fotobiomodulação (660 nm-1 J) com hialuronidase tópica (65 UTR) mostrou-se eficaz no processo de cicatrização de feridas por extravasamento de doxorrubicina, podendo ser incorporada à pratica da oncologia clínica.

Ratos Wistar , Terapia com Luz de Baixa Intensidade , Extravasamento de Materiais Terapêuticos e Diagnósticos , Antineoplásicos
Theriogenology ; 140: 52-57, 2019 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-31442737


Canine congenital malformations are structural or functional abnormalities of organs present at birth that possibly interfere with the viability of newborns, thus contributing to neonatal mortality. This study evaluated and described the incidence of congenital malformations in neonatal dogs and determined the mortality rates among those affected. Of the 178 litters and 803 newborns included in the study, 24.7% (44/178) of the litters presented neonates with congenital malformations. The total rate of neonates that presented malformations was 6.7% (64/803). The total mortality rate in newborns with congenital defects was 5.4% (44/803), representing 68.7% (44/64) of the deaths observed among those affected. The early (0-2 days old) and late (3-30 days old) mortality rates among the affected neonates were 61.4% (27/44) and 38.6% (17/44), respectively. In total, 27 malformations were recorded, and the most common congenital defects were cleft palate 2.8% (23/803) and hydrocephaly 1.5% (12/803), either alone or associated with other malformations. The malformations were recorded in 15 breeds: Pug, Miniature Pinscher, Rottweiler, Pitbull, French Bulldog, English Bulldog, Dachshund, Labrador Retriever, Lhasa Apso, Poodle, German Spitz, Yorkshire Terrier, Shih-tzu, Brazilian Terrier and mixed breed. One case of exposure to a teratogenic agent was reported, but no maternal exposure to teratogens during gestation was reported with the other litters. The occurrence of congenital defects may be related to genetic factors since the highest incidence of malformations (84.4%) was observed in purebred dogs.

Anormalidades Congênitas/veterinária , Doenças do Cão/epidemiologia , Animais , Anormalidades Congênitas/epidemiologia , Anormalidades Congênitas/etiologia , Anormalidades Congênitas/mortalidade , Doenças do Cão/etiologia , Doenças do Cão/mortalidade , Cães , Humanos , Lactente , Mortalidade Infantil
Life Sci ; 226: 57-67, 2019 Jun 01.
Artigo em Inglês | MEDLINE | ID: mdl-30930115


AIM: At performing a temporal analysis of the distribution pattern of islet endocrine cells and antioxidant enzymes in diabetic rats during the post-natal critical development window. MAIN METHODS: The newborns received streptozotocin (STZ) at birth for diabetes induction, and control females received the vehicle. The animals were euthanized at different lifetimes: D5, D10, D15, and D30. Morphological analysis of pancreas and biochemical assays was performed. KEY FINDINGS: The STZ-induced rats presented irregular shape of islet on D5 and there was an attempt to restore of this shape in other life moment studied. There was an increase progressive in islet area, however they maintained smaller than those of control rats, with lower labeling intensity for insulin, higher for glucagon and somatostatin, lower for SOD-1 was lower in the islets of the STZ-induced animals at all times studied and for GSH-Px in D10 and D30. SIGNIFICANCE: Although STZ-induced diabetic rats presented compensatory mechanisms to restore the mass of endocrine cells, this was not sufficient since these rats developed the diabetic state. This was confirmed by the oral glucose tolerance test from D30. In addition, the delta (δ)-cells presented ectopic location in islets, indicating a possible relationship for beta (ß)-cell mass restoration. There was a response of the pancreas to reduce the hyperglycemia in the first month of life. Furthermore, the cells from the endocrine pancreas of diabetic animals show a decline of antioxidant enzymatic, contributing to the increased susceptibility of cells to hyperglycemia-induced ROS in this postnatal critical development window.

Diabetes Mellitus Experimental/metabolismo , Ilhotas Pancreáticas/citologia , Ilhotas Pancreáticas/metabolismo , Animais , Antioxidantes/análise , Antioxidantes/metabolismo , Glicemia/metabolismo , Diabetes Mellitus Experimental/induzido quimicamente , Feminino , Glucagon , Glucose/metabolismo , Hiperglicemia , Insulina , Células Secretoras de Insulina , Masculino , Pâncreas/citologia , Gravidez , Ratos , Ratos Wistar , Análise Espaço-Temporal , Estreptozocina/farmacologia
Rev. bras. ciênc. vet ; 25(1): 17-21, jan./mar. 2018. il.
Artigo em Português | LILACS | ID: biblio-987765


O reconhecimento adequado dos sinais clínicos e lesões anatomopatológicas são importantes para caracterizar os casos de intoxicação exógena em cães e gatos. O diagnóstico definitivo do agente tóxico deve ser realizado por exame toxicológico. No período de 2009 a 2014 foram analisados 42 casos de necropsia com histórico de intoxicação exógena de 31 (73,8%) cães e 11 (26,2%) gatos. Destes 21 (50%) apresentaram Boletim de Ocorrência e 22 (52,4%) foram submetidos ao exame toxicológico. A maior prevalência verificada foi intoxicação por carbamato e nos exames necroscópicos a principal causa de morte insuficiência cardiorrespiratória, seguida por choque hipovolêmico. Na histopatologia do fígado, rim e cérebro as principais lesões encontradas foram congestão, degeneração e hemorragia. Os órgãos apresentaram sinais de autólise e putrefação. Com base no estudo observou-se que as técnicas diagnósticas complementares, histopatologia e exame toxicológico, fornecem suporte adicional na elaboração de laudos em casos de intoxicações exógenas criminais envolvendo animais.

Appropriate recognition of the clinical signs, lesions anatomical pathological that characterizes cases of animals intoxication that take to death. Associated with the methods of identification laboratorial of forensic toxicology is fundamental to establish a definitive diagnosis of the toxic agent. In period 2009 to 2014 are selected 42 cases, 31 (73,8%) dogs and 11 (26,2%) cats. These cases 21 (50%) feature police reports and 22 (52,4%) are made toxicological exam. Highest prevalence was intoxication for carbamate. Necroscopic exam revealed that main cause of death were cardiac respiratory insufficiency and hypovolemic shock. In histopathology of liver, kidney and brain the main lesions are congestion, degeneration and bleeding. The organs showed signs of autolysis and putrefaction. The diagnostic techniques used, histopathology and necropsy are additional and helps veterinarian to make reports for litigation in cases of intentional poisoning in animals.

Animais , Intoxicação , Toxicologia , Gatos , Prevalência , Cães
J Zoo Wildl Med ; 43(3): 674-7, 2012 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-23082541


Oslerus osleri is a small nematode that infects the respiratory tract of domestic and wild canids and is responsible for causing chronic nodular tracheobronchitis. This paper aims to report a case of parasitism by O. osleri in a free-living maned wolf (Chrysocyon brachyurus) that was struck by a motor vehicle. Fecal samples were collected, and the presence of spiral larvae, with "S"-shaped tails, was observed on flotation. This characteristic was compatible with the Filaroididae Family larvae of O. osleri. Although the animal did not show clinical signs of respiratory system impairment, a tracheobronchoscopy was performed. Semitransparent nodules, 5 mm in diameter, containing adult parasites were observed in the third distal portion of the trachea, cranial to the carina. Larval morphological characteristics and the nodular locations were compatible with an O. osleri respiratory tract infection.

Canidae , Nematoides/classificação , Infecções por Nematoides/veterinária , Animais , Anti-Helmínticos/uso terapêutico , Fezes/parasitologia , Ivermectina/uso terapêutico , Larva/classificação , Infecções por Nematoides/tratamento farmacológico , Infecções por Nematoides/parasitologia , Doenças Respiratórias/tratamento farmacológico , Doenças Respiratórias/parasitologia , Doenças Respiratórias/veterinária
Inhal Toxicol ; 24(11): 723-31, 2012 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-22954396


INTRODUCTION: Head and neck cancers are linked to smoking. The most affected sites are the oral cavity, pharynx and larynx. Experimental studies show epithelial lesions caused by cigarette smoke. OBJECTIVES: To investigate in rats the effects of acute cigarette smoke exposure on the mucosa of the tongue, pharynx and larynx. MATERIAL AND METHOD: Wistar rats were allocated into two groups of 20 animals: CG (control) receiving food and water ad libitum and TG (Tobacco) exposed to the smoke of 40 cigarettes/day for 60 days. Biopsy of their tongues, pharynxes and larynxes were subjected to histopathological, histomorphometric and immunohistochemical studies of protein p53 and ki-67. RESULT: The histological analysis of tongue from the Tobacco group revealed epithelial hyperplasia (90%), basal cell hyperplasia (95%) and mild to moderate dysplasia (85%). In pharynx showed basal cell hyperplasia (85%), dysplasia (25%) and vascular congestion (95%). In larynx showed basal cell hyperplasia (70%), epithelial hyperplasia (55%), congestion (100%) and inflammatory infiltrate (25%). Morphometric analysis revealed that keratin layer thickness was greater in the tobacco group. P53 immunoexpression was negative in both groups. Ki-67 immunoexpression was positive in basal cell nuclei but in parabasal cell nuclei it was positive only in the Tobacco group. CONCLUSIONS: The exposure of animals to cigarette smoke for 60 days resulted in benign lesions. The duration of exposure was not enough to cause the development cancer, as confirmed by the negative expression of p53 protein in all slides examined. Analysis of ki-67 expression showed intense epithelial proliferation in response to damage.

Antígeno Ki-67/metabolismo , Laringe/efeitos dos fármacos , Faringe/efeitos dos fármacos , Poluição por Fumaça de Tabaco/efeitos adversos , Língua/efeitos dos fármacos , Proteína Supressora de Tumor p53/metabolismo , Animais , Imuno-Histoquímica , Exposição por Inalação , Antígeno Ki-67/genética , Laringe/metabolismo , Laringe/patologia , Masculino , Mucosa Bucal/efeitos dos fármacos , Mucosa Bucal/metabolismo , Mucosa Bucal/patologia , Faringe/metabolismo , Faringe/patologia , Ratos , Língua/metabolismo , Língua/patologia , Proteína Supressora de Tumor p53/genética
Environ Mol Mutagen ; 47(8): 624-30, 2006 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-16878317


Extracts of the spice ginger (Zingiber officinale Roscoe) are rich in gingerols and shogaols, which exhibit antioxidant, anti-inflammatory, antifungal, antimycobacterial, and anticarcinogenic proprieties. The present study evaluated the chemoprotective effects of a ginger extract on the DNA damage and the development of bladder cancer induced by N-butyl-N-(4-hydroxibutyl) nitrosamine (BBN)/N-methyl-N-nitrosourea (MNU) in male Swiss mice. Groups G1-G3 were given 0.05% BBN in drinking water for 18 weeks and four i.p. injections of 30 mg/kg body weight MNU at 1, 3, 10, and 18 weeks. Group G4 and G5 received only the BBN or MNU treatments, respectively, and groups G6 and G7 were not treated with BBN or MNU. Additionally, Groups G2, G3, and G6 were fed diets containing 1, 2, and 2% ginger extract, respectively, while Groups G1, G4, G5, and G7 were fed basal diet. Samples of peripheral blood were collected during the experiment for genotoxicity analysis; blood collected 4 hr after each MNU dose was used for the analysis of DNA damage with the Comet assay (assay performed on leukocytes from all groups), while reticulocytes collected 24 hr after the last MNU treatment of Groups G5-G7 were used for the micronucleus assay. At the end of the experiment, the urinary bladder was removed, fixed, and prepared for histopathological, cell proliferation, and apoptosis evaluations. Ginger by itself was not genotoxic, and it did not alter the DNA damage levels induced by the BBN/MNU treatment during the course of the exposure. The incidence and multiplicity of simple and nodular hyperplasia and transitional cell carcinoma (TCC) were increased by the BBN/MNU treatment, but dietary ginger had no significant effect on these responses. However, in Group G2 (BBN/MNU/2% ginger-treated group), there was an increased incidence of Grade 2 TCC. The results suggest that ginger extract does not inhibit the development of BBN-induced mouse bladder tumors.

Anticarcinógenos/farmacologia , Dano ao DNA/efeitos dos fármacos , Neoplasias Urológicas/prevenção & controle , Zingiber officinale , Animais , Butilidroxibutilnitrosamina/toxicidade , Modelos Animais de Doenças , Masculino , Metilnitrosoureia/toxicidade , Camundongos , Invasividade Neoplásica , Extratos Vegetais/farmacologia , Neoplasias da Bexiga Urinária/induzido quimicamente , Neoplasias da Bexiga Urinária/patologia , Neoplasias da Bexiga Urinária/prevenção & controle
Braz. j. vet. res. anim. sci ; 42(4): 259-261, 2005.
Artigo em Português | LILACS | ID: lil-433192


Estudou-se 548 quartos mamários de búfalas, realizando-se exame clínico, CMT para detecção de mastite e coleta de amostras para isolamento bacteriano. Houve crescimento em duas amostras de Corynebacterium aquaticum caracterizadas bioquimicamente. Relata-se a participação do agente como colonizador do úbere e possível causador de mastites em bubalinos.

Búfalos , Corynebacterium/isolamento & purificação , Leite/microbiologia
Mycopathologia ; 158(1): 81-5, 2004 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-15487325


Biopsy by fine needle aspiration together with microbiological examination and scanning electron microscopy were evaluated in diagnosis of clinical bovine mastitis in a Prototheca zopfii outbreak. Fine needle aspiration was performed in 21 mammary quarters from ten Holstein cows presenting clinical mastitis caused by P. zopfii. The algae were previously identified in the microbiological examination of milk collected from these cows. Material aspirated from these 21 mammary glands was submitted to cytological staining (Gram, Giemsa and/or Shor staining). Fine needle aspiration enabled cytological identification of the algae in these 21 mammary glands, from which P. zopfii was isolated in the milk. Simultaneously, five mammary fragments collected by fine needle aspiration from these 21 mammary glands presenting clinical mastitis were also submitted to microbiological examination. P. zopfii was also isolated from these five fragments. Scanning electron microscopy technique also identified three of these five P zopfii strains isolated from mammary fragments collected by cytological aspiration. These results suggest that fine needle aspiration may be an alternative method for the diagnosis of clinical mastitis.

Biópsia por Agulha Fina/veterinária , Surtos de Doenças/veterinária , Mastite Bovina/microbiologia , Mastite Bovina/patologia , Prototheca/isolamento & purificação , Animais , Brasil/epidemiologia , Bovinos , Feminino , Infecções/diagnóstico , Infecções/microbiologia , Infecções/veterinária , Glândulas Mamárias Animais/citologia , Glândulas Mamárias Animais/microbiologia , Mastite Bovina/epidemiologia , Microscopia Eletrônica de Varredura/veterinária , Leite/citologia , Leite/microbiologia , Prototheca/citologia , Prototheca/ultraestrutura
Teratog Carcinog Mutagen ; 22(2): 129-38, 2002.
Artigo em Inglês | MEDLINE | ID: mdl-11835290


The influences of fasting on DEN-initiation and of intermittent fasting (IF) on the rat liver chemical carcinogenesis process were evaluated in a 52-week long assay. Three groups of adult male Wistar rats were used: Groups 1 to 3 were treated with a single i.p. injection of 200 mg/kg of diethylnitrosamine (DEN). Group 2 was submitted to 48 h fasting prior to DEN treatment. After the 4th week, Group 3 was submitted to IF, established as 48 h weekly fasting during 48 weeks, while Groups 1 and 2 were fed ad libitum until the 52nd week. All animals were submitted to 70% partial hepatectomy and sacrificed at the 3rd and 52nd weeks, respectively. Fasting prior to DEN-initiation did not influence the development of altered foci of hepatocytes (AFHs) and of hepatic nodules (Group 2 vs. Group G1). IF inhibited the development of preneoplastic lesions, since this dietary regimen decreased the number and the size of glutathione S-transferase (GST-P) positive foci and the number and size of liver nodules (Group G3 vs. Group G1). The inhibitory effect of IF was also reflected in the development of clear and basophilic cell foci. These results indicate that long-term IF regimen exerts an anti-promoting effect on rat hepatocarcinogenesis induced by DEN.

Alquilantes/toxicidade , Carcinoma Hepatocelular/fisiopatologia , Dietilnitrosamina/toxicidade , Jejum/fisiologia , Neoplasias Hepáticas Experimentais/fisiopatologia , Animais , Basófilos/patologia , Carcinoma Hepatocelular/induzido quimicamente , Carcinoma Hepatocelular/metabolismo , Progressão da Doença , Glutationa Transferase/metabolismo , Técnicas Imunoenzimáticas , Neoplasias Hepáticas Experimentais/induzido quimicamente , Neoplasias Hepáticas Experimentais/metabolismo , Masculino , Ratos , Ratos Wistar
Ciênc. rural ; 31(6): 1007-111, nov.-dez. 2001. ilus, tab
Artigo em Português | LILACS | ID: lil-313150


Foram utilizados 40 ratos Wistar, machos, com peso inicial médio de 225 gramas, separados em dois grupos. Após serem anestesiados com éter, foi induzida uma ferida limpa na regiäo torácica dorsal cranial, mediante a utilizaçäo de molde metálico de 2,0 x 1,5cm. No grupo I, foi utilizada pomada contendo óleo de fígado de bacalhau, extrato de confrei, extrato cítrico, óxido de zinco e veículo (Creamex); no grupo II, a ferida foi apenas limpa com soluçäo salina isotônica. Para a avaliaçäo histológica, foram submetidos à eutanásia cinco animais de cada grupo no 3§, 7§, 14§ e 21§ dia de pós-operatório. O grupo tratado com a pomada orgânica apresentou padräo cicatricial de qualidade superior em relaçäo ao grupo tratado com salina isotônica, representado por formaçäo de fibras colágenas, neoformaçäo de vasos e reepitelizaçäo completa da epiderme.

Animais , Masculino , Cicatrização , Cloreto de Sódio/uso terapêutico , Pomadas , Ratos Wistar , Soluções Isotônicas/uso terapêutico
Ciênc. rural ; 28(1): 89-93, jan.-mar. 1998. ilus
Artigo em Português | LILACS | ID: lil-246408


Foram empregados 30 ratos, machos, linhagem Wistar. Implantou-se sob a pele segmentos de 3cm de comprimento de "linha de pesca" mantida em formalina, "linha de pesca" autoclavada uma vez, "linha de pesca" autoclavada duas vezes e fio de náilon cirúrgico. Cada animal recebeu dois tipos de material de sutura, em locais paralelos e eqüidistantes da coluna vertebral. Foram sacrificados com cinco, 15 e 90 dias de pós-operatório para que se procedesse o exame histopatológico. Pelo grau de reaçäo tecidual pode-se concluir que: a maior reaçäo ocorreu com a "linha de pesca" mantida em formalina e a menor com o fio de náilon cirúrgico; as "linhas de pesca" autoclavadas uma e duas vezes se comportaram de forma semelhante e apresentaram uma reaçäo intermediária.

Animais , Masculino , Ratos , Fios Ortopédicos , Fios Ortopédicos/veterinária , Pele , Técnicas de Sutura/veterinária , Ratos Wistar