Hepatic capillariasis in two captive Callithrix penicillata

O presente trabalho relata a ocorrência de dois casos de capilariose hepática em primatas não-humanos da espécie Callithrix penicilatta mantidos em cativeiro. O caso 1 era uma fêmea jovem, que exibiu fígado de cor pálida, suavizada devido a autólise e algumas áreas múltiplas visivelmente esbranquiçadas. O caso 2 foi registrado em um macho adulto, de idade desconhecida, com fígado levemente pálido e acastanhado. A análise histológica das amostras revelou extensa fibrose intersticial com áreas de hemossiderose, exemplares de Capillaria hepatica adultos e numerosos ovos morfologicamente caracterizados pela sua forma elipsóide, não-embrionárias, com tampões bipolares que se sobressaem da casca, que é espessa, birrefringente e com uma camada porosa, dando uma aparência estriada ao ovo. Algumas formações císticas continham ovos do nematóide cercados por numerosas células gigantes do tipo corpo estranho. A literatura consultada possui poucas referências acerca da presença de Capillaria hepatica em primatas não-humanos. No entanto, infecções semelhantes são bem estudadas em roedores domésticos.This study aimed to describe the occurrence of hepatic capillariasis in two non-human primates of the species Callithrix penicillata that were kept in captivity. Case 1 was in a young female, whose liver presented pale coloring, softening due to autolysis and several noticeably whitish areas. Case 2 was in a male of unknown age, whose liver was slightly pale and brownish. Histological analysis on the samples revealed extensive interstitial fibrosis with hemosiderotic areas. Adult nematodes of Capillaria hepatica and numerous eggs, morphologically characterized by their non-embryonic ellipsoid shape, with bipolar plugs that did not protrude from the shell, thick and birefringent, with a porous layer, thus giving a striated appearance to the eggs. Some cystic formations presented nematode eggs surrounded by numerous foreign-body giant cells. The literature consulted made little reference to reports of Capillaria hepatica in non-human primates. However, similar infections have been extensively studied in domestic rodents.

OCORRÊNCIA E ASPECTOS MACRO E MICROSCÓPICOS DO CISTO DE INCLUSÃO DA SEROSA UTERINA EM CADELAS E GATAS

Objetivou-se relatar a ocorrência de cistos de inclusão da serosa uterina em cadelas e gatas, bem como descrever seus aspectos macroscópicos e microscópicos. Foram utilizados 200 úteros (100 cadelas e 100 gatas) procedentes de ovariosalpingohisterectomia eletiva. As peças foram fixadas inteiras em formaldeído a 10% tamponado, seguindo-se ao processamento histológico de rotina, com as lâminas coradas pela hematoxilina e eosina. Os animais de estudo foram classificados segundo a espécie, a faixa etária, a parição e o uso de contraceptivos. Os dados obtidos foram analisados pelo teste Qui-quadrado, com nível de significância de 5%. Dos úteros analisados 7% das cadelas e 1% das gatas apresentaram cistos de inclusão da serosa uterina, não havendo diferença estatística significativa para a faixa etária, a parição e o uso de contraceptivos interespécie. Macroscopicamente, foram observadas dilatações císticas únicas localizadas na região miometrial ou na superfície serosa do útero. Estes cistos estavam presentes na porção cranial ou medial dos cornos uterinos. Ao corte, apresentaram conteúdo líquido de aspecto seroso. Histologicamente, as dilatações císticas localizavam-se entre o miométrio e o perimétrio ou apenas na camada miometrial. O revestimento interno dos cistos era composto por epitélio variando em cúbico, colunar, pavimentoso, estratificado ou misto. Conclui-se que o cisto de inclusão da serosa uterina é uma alteração patológica com baixa incidência em cadelas e gatas, que causa irregularidade na superfície uterina, pela formação dos cistos, e apresenta ampla variedade de revestimento epitelial interno

Paraganglioma de corpo aórtico em cão

Background: Aortic body paragangliomas are uncommon neoplasms that develop mainly in aortic and carotid bodies. It has been supposed that genetic factors and chronic hypoxia may stimulate tumor development. The brachycephalic dog breeds, as Boxer, are most predisposed to present this neoplasm. The clinical symptomatology is related to tumor size and localization. Usually aortic body paraganglioma has benign biological behavior, when it is malignant, rarely promotes metastases. The aim of this study was to report a case of the aortic body paraganglioma as death cause in a dog.Case: A canine, 10-year-old, male, cross breed, presented clinical signs as anorexia, emesis, cough, dyspnea and exercise intolerance. After death the animal was examined at the Department of Veterinary Pathology at the Federal Rural University of Amazonia. On necropsy, no pericardial effusion was identified, however pleural and abdominal effusion was observed, volume like 1000 and 700 mL, respectively. The heart had a neoplasm near the left atrium, it measured 6.5 x 8.2 cm, had irregular surface, firm consistency, grayish color, and at the cut showed infiltration in the myocardium, as well as obstruction of the left atrial lumen and left ventricle concentric hypertrophy. No distant metastases were found. Microscopically, the tumor consisted of polyhedral morphology cells, eosinophilic cytoplasm, spherical and hyperchromatic nucleus. Cells were grouped into lobes separated by fibrovascular stroma, large cells (less uniform cells), low mitotic rate and myocardial infiltration. On immunohistochemical analysis anti-cytokeratin, anti-vimentin and anti-S-100 antibodies were used. Tumour cells stained was absent for anti-cytokeratin and anti-vimentin, but was anti-S-100 positive. A case of malignant aortic body paraganglioma grade II was diagnosed.Discussion: The reported case was diagnosed in cross breed dog. However, brachycephalic dog breeds, as Boxer, are more predisposed to develop this kind of tumor. The development of these tumors is related to the genetic factors and chronic hypoxia. It was suggested that the tumor origin on this case is related to genetic factors, because the animal had no respiratory diseases, he was not brachycephalic and lived in a low altitude city, what exclude the possibility to have been induced by chronic hypoxia imposed by low oxygen. The clinical symptomatology presented by the animal days before death was related to the localization and size of the tumor. The macroscopic findings were similar to those of other studies. And the histopathological findings of the report were indicative for the histological classification of malignant aortic body paraganglioma. On immunohistochemical analysis it was negative for anti-cytokeratin and anti-vimentin antibodies, however was positive for anti-S-100 antibody, thus differentiated from other tumors that may occur in this local and confirmed the diagnosis of malignant aortic body paraganglioma grade II. The dog died due to tumor-related causes, however some authors indicate de tumor as a necropsy finding. The findings made it possible to conclude that tumor was aortic body paraganglioma and that it promoted cardiorespiratory complications related to localization and infiltration, what was worsened by pleural effusion leading the animal to the cardiogenic shock that culminated with death. It shows the importance of including this tumor in the list of differential diagnoses of heart diseases in dogs

Schistosomus reflexus in a Dog and a Cat

Background: Schistosomus reflexus (SR) is a congenital anomaly, that the animal presents exposed abdominal and thoracic organs. The alterations includes limbs malformation, abnormal spinal column, liver and diaphragm hypoplasia, genitourinary and gastrointestinal changes, on this way, the fetus can not survive. The aim of this study was to report the first SR case in dog and cat in Brazil, and describe anatomical, pathological and radiographic changes.Case: The puppy had ventral midline defect in the abdominal and thoracic wall extending from the sternum to the pubis with viscera exposition, including the heart, lung, liver, stomach, intestine, spleen, kidneys, moreover right army was abnormal, however no spinal column was present. It was performed radiography to evaluate bone abnormalities, and was diagnosed agenesis of carpal, metacarpal and phalange bones. The kitten had ventral midline defect measuring 4 x 2 cm, in the abdominal wall and exposition of liver, stomach, intestine and spleen, as well as tibiotarsal joint arthrogryposis on both lags. It was performed fetus radiography and no spinal column change was diagnosed.Discussion: Schistosomus reflexus is a congenital abnormality common in ruminants. Although it was few reported in dogs and cats. The two cases in this study are the firsts reposts in Brazil in these especies. In our case, the dog had exposition of abdominal and thoracic organs and died one hour after born, similar to this, another author reported a case where the thoracic and abdominal evisceration and the puppy died ten minutes after born. However, in another case with abdominal evisceration only, the puppy survived for eight days. Probably it happened because respiratore function was not compromised. The kitten had abdominal opening only, in turn, other authors reported a case whose abdominal viscera exposition was by pelvic fissure, and another case, what presented thoracic and abdominal evisceration, like our dog case. Some authors affirm that this defect causes fetal dystocia on ruminants, because of the vertebral column abnormality, what promote passage difficult at born moment. On the other hand, dogs did not present these kind of changes and dystocia was not related to this pathology on cases in dogs and cats, however most of these authors performed cesarean because the female did not get normal born. As well as, on two cases in kitten were reported vertebral column abnormalities, what can be related to dystocia. Even no animal of our study present any vertebral column abnormality, other bone changes were found, like carpal, metacarpal and phalange agenesis on army of the dog and tibiotarsal joint arthrogryposis on both lags of the cat fetus. The others report in dogs did not found vertebral column or bone changes, but in cats it was observed vertebral column abnormalities and other changes, like arthrogryposis on four limbs, skull flattening, mandibular brachignathism, reduced ossification of the cranial vault bones, palatoschisis and unfused eyelids. SR etiology is not clearly known, it may be related with genetic, mechanic, endocrine, metabolic, nutrition and infectious factors. The moment of embryonic development, where these factors influence the changes is related with abnormality grade. Although, Chromosomic abnormalities, like chromatid and chromosome breaks, non-homologous pairing of chromosomes was shown. In this study the bitch did not present any metabolic, endocrine or nutritional change, on other hand the queen was submitted to exogenous hormonal treatment to avoid pregnancy, what may be related to SR development. SR is a rare abnormality in dog and cat, fetus radiographic, anatomical and pathological findings confirmed to being this congenital defect, and this are the first reports in Brazil in these species

Squamous Cell Carcinoma in Third Eyelid of Cat

Background: The third eyelid neoplasms are uncommon in cats. The squamous cell carcinoma are easily found in head and neck of same specie, although is unusual in eye region. The more commun localization is eyelid and eyeball, being 60 and 15%, respectively. It could bee diagnosed by citology, histopathology, imunohistochemistry and molecular biology. The surgery is more effective treatment, because the tumor can be totally removed and it must available surgical margin. The aim of this study was to report a case of squamous cell carcinoma in third eyelid of a cat and show how it was treated with radical surgery. Case: A 11-year-old spayed female domestic short-haired white and black colored cat was presented for evaluation at Maria Dias Teixeira Hospital of Amazonia Federal Rural University (UFRA), of an red ocular mass fast growth in the left eye for 2 months. Physical exam was within normal limits. The animal presented discomfort on the region, when it was manipulated. The mass was ulcerated and blood-tinged ocular discharge, had 3.3 x 2 cm, beginning on third eyelid and overlay all the eyeball. Blood was collated to make exams. Complete blood count and serum chemistry profiles were within normal ranges, but leukocytes were increased and it was treated with Amoxicillin (22 mg/kg). It was performed biopsy to histopathology and immunohistochemistry diagnose, and radiography and ultrasonography to found metastasis. Ocular tissues were fixed in 10% formalin and processed routinely for histological examination. Sections were stained with hematoxylin and eosin and diagnosed poorly differentiated Squamous cell carcinoma. Immunohistochemistry was performed using anti-cytokeratin 1:200, anti-vimentin 1:150 and anti-actin alpha smooth muscle 1:700 antibodies. The tumor cells were positive for cytokeratin and negative for vimentin. In tumor stroma was immunostaining of myofibroblasts by actina alpha smooth muscle. Because of malignment and infiltrative neoplasm, it was chosen to perform eye and eyelid enucleation. At post-operative evaluation no complication was found and in tem days, surgical wound was held. Seven months post-operative no neoplastic tissue had growth on local. Discussion: A retrospective study at Belem and some close cities, which took all neoplasms and classified, found only 1.5% of ocular neoplasms, and no one was in cats. Similarly occurred with another study, that 1.21% out of ocular masses, just 12.5% was diagnosed in cats, showing how uncommon is ocular neoplasm in cats. Including theses lesions, less of then are only in third eyelid. Ultraviolet radiation is the most related probably causes of squamous cell carcinoma. At Belem City ultravioleta radiation is very high, can bee 11 in some stations, in a scale of 0 to 14, the medial temperature is 27ºC. Another factor that could influence squamous cell carcionoma progress is skin color, animals’ wich skin is light have more probably to develop this neoplasm. On our case, close to eye, skin was dark, although the carcinoma was growth at third eyelid mucosa, a local that have no protection to ultraviolet radiation. Myofibroblasts observed in the tumor stroma are important in the invasion process of this tumor in humans. The treatment used in this case was radical surgery, with no other adjuvant, what is indicate for some authors. Another authors prefer exscind only third eyelid, but sometimes it is not possible, because this kind of neoplasm is very infiltrate. The localization and the nodular form of squamous cell carcinoma found in this study is uncommon, mainly in cats. Histopathological and immunohistochemical analysis were important for definitive diagnostic. The treatment by enucleation of eyeball and removing the eyelids was effective, without relapse in 7 months after surgery. Keywords: oncology, ophthalmology, ocular neoplasm, feline

Hepatic myelolipomas in Callimico goeldii (Thomas, 1904) kept in captivity

Universidade Federal Rural da Amazônia. Instituto de Saúde e Produção Animal. Belém, PA, Brazil.Universidade Federal Rural da Amazônia. Instituto de Saúde e Produção Animal. Belém, PA, Brazil.Ministério da Saúde. Secretaria de Vigilância em Saúde. Instituto Evandro Chagas. Ananindeua, PA, Brasil / Fundação Oswaldo Cruz. Instituto de Ciência e Tecnologia em Biomodelos. Rio de Janeiro, RJ, Brazil.Universidade Federal Rural da Amazônia. Instituto de Saúde e Produção Animal. Belém, PA, Brazil.Myelolipoma is an unusual benign neoplasm in veterinary medicine. This work intended to report the occurrence of hepatic myelolipomas in Neotropical primates of the Callimico goeldii species kept in captivity. These cases were diagnosed during necropsy in a survey on liver neoplasms in the period of 2004 to 2008. Two cases were found in adult male, and two in adult female animals. The diagnoses were obtained through data analysis of necropsy records, pathological examination of the cases, and histological confirmation. Three (75%) of the animals showed clinical signs of progressive weight loss, and two (50%) of them exhibited regional abdominal bloating. The livers had protrusions of pale yellow color on the surface of all lobes. Histologically, the tumors were formed by mature myeloid tissue with high hematopoietic cellularity, represented by the megakaryocytes and meroblastic cells and immature erythroblasts. We conclude that nonhuman primates of the Callimico goeldii species might have predisposition for liver myelolipoma, which are neoplasms that can lead to the failure and destruction of this organ

Capilariose hepática em dois Callithrix penicillata de cativeiro

Universidade Federal Rural da Amazônia. Instituto da Saúde e Produção Animal. Laboratório de Patologia Animal. Belém, PA, Brazil.Universidade Federal Rural da Amazônia. Instituto da Saúde e Produção Animal. Laboratório de Parasitologia Veterinária. Belém, PA, Brazil.Ministério da Saúde. Secretaria de Vigilância em Saúde. Instituto Evandro Chagas. Centro Nacional de Primatas. Ananindeua, PA, Brasil.Universidade Federal Rural da Amazônia. Instituto da Saúde e Produção Animal. Laboratório de Patologia Animal. Belém, PA, Brazil.Universidade Federal Rural da Amazônia. Instituto da Saúde e Produção Animal. Laboratório de Patologia Animal. Belém, PA, Brazil.This study aimed to describe the occurrence of hepatic capillariasis in two non-human primates of the species Callithrix penicillata that were kept in captivity. Case 1 was in a young female, whose liver presented pale coloring, softening due to autolysis and several noticeably whitish areas. Case 2 was in a male of unknown age, whose liver was slightly pale and brownish. Histological analysis on the samples revealed extensive interstitial fibrosis with hemosiderotic areas. Adult nematodes of Capillaria hepatica and numerous eggs, morphologically characterized by their non-embryonic ellipsoid shape, with bipolar plugs that did not protrude from the shell, thick and birefringent, with a porous layer, thus giving a striated appearance to the eggs. Some cystic formations presented nematode eggs surrounded by numerous foreign-body giant cells. The literature consulted made little reference to reports of Capillaria hepatica in non-human primates. However, similar infections have been extensively studied in domestic rodents

Expression pattern of Cdkn2b and its regulators in canine mammary tumors

Federal University of Pará. Biological Science Institute. Molecular Biology Laboratory. Belém, PA, Brazil / Ministério da Saúde. Secretaria de Vigilância em Saúde. Instituto Evandro Chagas. Laboratório de Cultura de Tecidos e Citogenética. Ananindeua, PA, Brasil.Federal University of Pará. Biological Science Institute. Molecular Biology Laboratory. Belém, PA, Brazil.Federal University of Pará. Oncology Research Center. Belem, PA, Brazil.Federal Rural University of Amazonia. Health and Animal Production Institute. Animal Pathology Laboratory. Belém, PA, Brazil.Federal Rural University of Amazonia. Health and Animal Production Institute. Animal Pathology Laboratory. Belém, PA, Brazil.Ophir Loyola Hospital. Molecular Biology Laboratory. Belém, PA, Brazil / Federal University of Pará. Molecular Biology and Human Cytogenetics Laboratory. Belém, PA, Brazil.Federal University of Pará. Biological Science Institute. Molecular Biology Laboratory. Belém, PA, Brazil.Federal University of Pará. Biological Science Institute. Molecular Biology Laboratory. Belém, PA, Brazil.Background/Aim: In female dogs, mammary cancer is the most frequent cancer type, accounting for 50% of all tumors affecting these animals. Amongst the commonly altered genes in cancer is the cell-cycle regulator cyclin-dependent kinase inhibitor 2B (Cdkn2b), whose expression is negatively regulated by protein products of BMI1 proto-oncogene (Bmi1), MYC proto-oncogene (Myc) and T-box gene transcription factor 2 (Tbx2) genes. Considering this, the aim of this study was to evaluate the expression pattern of the Cdkn2b gene and these regulators in canine mammary tumors of dogs from Northern Brazil (Belém, Pará). Material and Methods: Gene expression in samples from 33 animals was assessed by real-time polymerase chain reaction. To check the influence of methylation on gene expression, bisulfite sequencing polymerase chain reaction was also performed. Results: All studied genes, except Cdkn2b, were found at increased expression levels in tumor tissue when compared with control samples. No correlation between expression and methylation data was observed. Conclusion: Our results suggest these markers may have a diagnostic value in the veterinary clinic

Lesões jejunais em saguis cativos afetadas pela doença do emagrecimento progressivo crônico

Instituto Evandro Chagas, Centro National de Primatas, and the Universidade Federal Rural da Amazônia.Universidade Federal Rural da Amazônia. Instituto de Produção e Saúde Animal. Laboratório de Patologia Animal. Belém, PA, Brasil.Ministério da Saúde. Secretaria de Vigilância em Saúde. Instituto Evandro Chagas. Laboratório de Microscopia Eletrônica. Ananindeua, PA, Brasil.Ministério da Saúde. Secretaria de Vigilância em Saúde. Instituto Evandro Chagas. Centro Nacional de Primatas. Ananindeua, PA, Brasil.Ministério da Saúde. Secretaria de Vigilância em Saúde. Instituto Evandro Chagas. Ananindeua, PA, Brasil.Universidade Federal Rural da Amazônia. Instituto de Produção e Saúde Animal. Laboratório de Patologia Animal. Belém, PA, Brasil.Ministério da Saúde. Secretaria de Vigilância em Saúde. Instituto Evandro Chagas. Laboratório de Virologia. Ananindeua, PA, Brasil.Universidade Federal Rural da Amazônia. Instituto de Produção e Saúde Animal. Programa de Pós-Graduação em Saúde e Produção Animal na Amazônia. Belém, PA, Brasil.INTRODUCTION: Wasting marmoset syndrome affects the Callitrichidae family reared in captivity, characterized by progressive muscle-weakening and wasting conditions. It has been one of the main causes of death in primates of this genus. OBJECTIVE: To evaluate the existence of histopathological and ultrastructural alterations in jejunal of marmosets that presented a clinical history of the progressive wasting disease in relation to healthy animals. MATERIALS AND METHODS: Jejunal biopsies of seven marmosets were performed: five of them, two specimens of Callithrix jacchus and three Callithrix penicillata, were affected by clinical signs of progressive weight loss and muscle weakness; and two healthy animals, one of each cited species, were used as control animals. RESULTS: Marmosets with a clinical history of progressive weight loss presented jejunal villus atrophy with a flattened surface; also the goblet cells were scarce and barely functional compared to the control animals. CONCLUSION: These changes can cause malabsorption of nutrients and promote the progressive weight loss of callitrichids