Diffuse nephrocalcinosis is a rare condition in dogs. It is reported the case of a one-year-old crossbred female dog with severe chronic renal failure, and bilateral diffuse renal mineralization detected by ultrasound. The histopathological diagnosis was a severe diffuse non-suppurative chronic glomerulonephritis with metastatic calcification and tubular atrophy.

This study aimed to carry out a retrospective study of the cases of neoplasms in the male reproductive tract in dogs that have been diagnosed by histopathology in the laboratory of animal pathology of the Faculty of Veterinary Medicine of the National University of San Marcos (Lima, Peru) during the period 2011-2017. A total of 85 cases of neoplasms were diagnosed in the reproductive system of 1096 cases of canine neoplasms (7.75%). The most frequent were the testicular tumours (43.5%), the most common being the diffuse seminoma.  

La nefrocalcinosis difusa es una condición rara en perros. Se reporta el caso de una perra mestiza de un año, que presentaba una falla renal crónica severa, y que al estudio ecográfico se observó una mineralización difusa bilateral renal. El diagnóstico histopatológico fue una severa glomerulonefritis no supurativa difusa crónica con calcificación metastásica y atrofia tubular.

This study aimed to carry out a retrospective study of the cases of neoplasms in the male reproductive tract in dogs that have been diagnosed by histopathology in the laboratory of animal pathology of the Faculty of Veterinary Medicine of the National University of San Marcos (Lima, Peru) during the period 2011-2017. A total of 85 cases of neoplasms were diagnosed in the reproductive system of 1096 cases of canine neoplasms (7.75%). The most frequent were the testicular tumours (43.5%), the most common being the diffuse seminoma.  

The aim of this study was to determine the frequency of perianal neoplasms in dogs from samples histopathologically diagnosed in the Animal Pathology Laboratory of the National University of San Marcos in the period 2005 to 2012. A total of 52 cases of perianal tumors were diagnosed in 1283 cases of canine tumors (4.1%). The hepatoid gland adenoma was the most frequent (46.2%, 24/52).

The aim of this retrospective study was to determine the frequency of neoplasms in the oral cavity in canines and felines that were histopathologically diagnosed in the Veterinary Pathology Laboratory of the National University of San Marcos, Lima, Peru, in the period 2007 to 2013. A total of 115 cases of oral tumors were diagnosed in 1454 cases of canine tumors (7.9%) and 7 cases of oral tumors in 54 cases of feline tumors (13%). The epuli was the most frequent neoplasia (20.5%).

A total of 4701 canine protocols, processed at the Laboratory of Histopathology of the Faculty of Veterinary Medicine of the National University of San Marcos (Lima) during the period 2003-2014 were evaluated to determine the frequency of types of cancer diagnosed by histopathology and in the case of the transmissible venereal tumor (TVT) by cytology. There were 3480 cases of neoplasms, of which 554 (11.8%) belonged to canines from 0 to 5 years of age. The 4-5 years old dogs (261 cases, 47.1%) and the male dogs (333 cases, 60.1%) had the highest number of neoplasms. The benign neoplasms predominated with 279 cases (50.4%), with TVT being the most frequent neoplasia of this group and of the general count with 94 cases (33.7%). The most frequent malignant neoplasm was rhabdomyosarcoma, with 47 cases (17.1%).

El objetivo del presente estudio fue determinar la frecuencia de neoplasias perianales en caninos mediante diagnóstico histopatológico en el Laboratorio de Patología Animal de la Universidad Nacional Mayor de San Marcos, Lima, Perú, en el periodo 2005-2012. Se diagnosticaron 52 casos de neoplasias perianales dentro de 1283 casos de neoplasias caninas (4.1%). El adenoma de glándulas hepatoides fue el de mayor frecuencia (46.2%, 24/52).

El objetivo del presente estudio retrospectivo fue determinar la frecuencia de neoplasias en cavidad oral en caninos y felinos mediante el diagnóstico histopatológico en el Laboratorio de Patología Veterinaria de la Universidad Nacional Mayor de San Marcos, Lima, Perú, durante el periodo 2007-2013. Se diagnosticaron 115 casos de neoplasias orales dentro de 1454 casos de neoplasias caninas (7.9%) y 7 casos de neoplasias orales dentro de 54 casos de neoplasias felinas (13%). El épuli fue la neoplasia de mayor frecuencia (20.5%).

Se evaluaron un total de 4701 protocolos de caninos, procesados en el Laboratorio de Histopatología de la Facultad de Medicina Veterinaria de la Universidad Nacional Mayor de San Marcos (Lima) durante el periodo 2003-2014 para determinar la frecuencia de los tipos de neoplasias diagnosticadas mediante histopatología y en el caso del tumor venéreo transmisible (TVT) por citología. Se hallaron 3480 casos de neoplasias, de las cuales 554 (11.8%) pertenecían a caninos de 0 a 5 años de edad. Los canes de 4 a 5 años (261 casos; 47.1%) y los de sexo masculino (333 casos; 60.1%) presentaron la mayor cantidad de neoplasias. Las neoplasias benignas predominaron con 279 casos (50.4%), siendo el TVT la neoplasia más frecuente de este grupo y del conteo general con 94 casos (33.7%). La neoplasia maligna más frecuente fue el rabdomiosarcoma, con 47 casos (17.1%).

Se realizó un estudio para determinar la presencia de anticuerpos de Mycoplasma hyopneumoniae en cerdos provenientes de granjas de crianza artesanal, mediante la detección de anticuerpos, utilizando el ensayo inmuno absorbente ligado a enzimas(ELISA). Ciento sesenta animales de 8 a 9 meses de edad procedentes de granjas de 4 distritos ubicados al Sur de Lima, fueron muestreados al momento de ser beneficiados en 2 carmales frigoríficos del valle de Lima. Se obtuvo una frecuencia de animales positivos del 11.25% (18/160), demostrándose la presencia de anticuerpos del microorganismo bajo esta modalidad de crianza. Mediante el uso de la prueba de Chi Cuadrado no se encontró asociación estadística significativa entre la presencia de seroreactores positivos y el área geográfica de donde provenían los animales.

Se realizó un estudio para determinar la presencia de anticuerpos de Mycoplasma hyopneumoniae en cerdos provenientes de granjas de crianza artesanal, mediante la detección de anticuerpos, utilizando el ensayo inmuno absorbente ligado a enzimas(ELISA). Ciento sesenta animales de 8 a 9 meses de edad procedentes de granjas de 4 distritos ubicados al Sur de Lima, fueron muestreados al momento de ser beneficiados en 2 carmales frigoríficos del valle de Lima. Se obtuvo una frecuencia de animales positivos del 11.25% (18/160), demostrándose la presencia de anticuerpos del microorganismo bajo esta modalidad de crianza. Mediante el uso de la prueba de Chi Cuadrado no se encontró asociación estadística significativa entre la presencia de seroreactores positivos y el área geográfica de donde provenían los animales.

This study evaluated the protection conferred by a vaccine against Gumboro disease in laying hens. Three hundred Isa Brown one-day-old chicks were equally distributed in three groups. Groups A and B were vaccinated, twice, at 9 and 24 days old with an intermediate-intermediate strain (2512), and group C remained unvaccinated. Groups B and C were challenged at 32 days old with the F52/70 strain through the eye. Bursal index, bursa/spleen relationship and microscopic lesions of the bursa, spleen and thymus after vaccination were evaluated at 1, 35 and 45 days old. Antibody titers by an indirect ELISA study but not in birds of groups A and B. The bursal index values in the three groups were compatible with bursal atrophy. Histopathological lesions were severe in the three groups. At 45 days of age, birds of group C had the major seroconvertion (3997), while groups A and B presented similar ...

The study aimed to determine the frequency of neoplasmas that were histopathologically diagnosed at the Pathology Laboratory of School of Veterinary Medicine, San Marcos University in the period 1996-2007. The retrospective study included 73 cases of neoplasms. Animals older than 9 years of age (49.3%) and females (72.9%) were the most affected. Tumors of epithelial origin were the most common type (53.5%), being mammary adenocarcinoma (21.1%) and lymphoma (16.9%) the most frequent.

A total of 48 intestinal samples of new born alpacas which died due to diarrhea processes were evaiuated. Samples collected during the dry season (June-August, 2002) were from animals belonging to the Experimental Research Statiori of IVITA, La Raya, Cnsco, and &ose collected during the pamtntion scason (Febmary, 2003) were from a fanners community inNuiioa, Puno. Topographic intestinal samples were tjken, fixed in 15% fomalinen solution and stained with H-E. Thiriy seven cases were compatible with bacteria1 omcesses. where 30 of k m were due to enterotoxemia and the other 7 were processes complicated with colibacilosis. Only two of these cases wereassociated with Cqptosporidirim sp. Four cases were related with Eimeria macusaniensis and enterotoxemia and ?cases wirh E. maarsanensis and E. prrnoensis. OnIy 4 cases were observed in association witb E. larnae. This is the first report ...

The aim of the study was to evaluate an immunohistochemical technique for the diagnosis of canine mixed mammary tumors (CMMT) using anti-cytokeratin AE1/AE3 and anti-vimentin monoclonal antibodies that are routinely used in the diagnosis of human mammary tumors. Twenty paraffin tissue blocks of canine mixed mammary tumors, previously diagnosed by hematoxilin-eosin (HE) histopathology were used. Three slides sets, 4 μm thick, were obtained per viability of the tissue, and the other two were used for the immunohistochemistry through the Streptavidin-Biotin-labeled method. Epithelial cells positively reacted against the anti-cytokeratin AE1/AE3 showing a brown colour at the cytoplasma level. Fibroblasts, connective tissue, myoepithelial cells, cartilage cells and bone areas showed a brown colour against the anti-vimentin antibody. All benign tumors reacted positively to both antibodies, wh...

Canine histopathological records from de Pathology Laboratory of the Universidad Nacional Mayor de San Marcos, Lima, during the period of 1995-2006 were evaluated for determining the frequency of neoplasias in relation to sex, age, breed, cellular origin, and localization. Out of 4438 canine records, 1092 corresponded to neoplasia (24.6%). Higher tumoral frequency was found in age groups of 5 to <9 (37.1%) and ≥9 (35.6%) years old. None differences were found due to sex, but the Boxer breed was the most affected (12.1%). Malignant neoplasias were most frequent (64.9%) than benign ones, where the transmissible venereal tumor was the most frequent benign tumor and the mammary adenocarcinoma was the most frequent malign tumor. Skin and subcutaneous tissue (39.5%) and mammary gland (16.7%) were the most common sites for neoplasias.

The aim of this study was to determine the frequency and type of prostate disorders in canines through the use of ultrasound and cytology techniques. A total of 62 noncastrated dogs that were patients of the Small Animals Clinic of the Veterinary Faculty of San Marcos University, Lima were used. The ultrasound examination was conducted followed by the ultrasound-guided prostatic aspiration technique. The smears were stained and the cell recognition was done. The effect of age, size, breed and clinical signs on the clinical disorder was evaluated. The results showed that 40 animals (64.5%) had a prostate disorder with any of the two tests. The ultrasound technique showed cysts or abscesses (4.8%), hyperplasia (32.3%), hyperplasia and prostatitis (20.9%), prostatitis (4.8%) and neoplasias (1.6%); while through cytology was found glandular hyperplasia (32.3%), hyperplasia associated to infl...

The purpose of this study was to determine the frequency of canine rhabdomyosarcoma based on its histopathological classification, that were diagnosed in the histopathology laboratory of the Veterinary Faculty of San Marcos University, Lima, Peru in the period of January 2000 to December 2008. A total of 63 cases of canine rhabdomyosarcoma were diagnosed out of 1125 canine neoplasic tumors (5.6 ± 1.3%). Among this, only 47 cases were possible to classify where 27 cases (57.4%) corresponded to embryonal rhabdomyosarcoma, 19 (40.4%) to alveolar rhabdomyosarcoma, and one case (2.1%) to pleomorphic rhabdomyosarcoma. The most frequent region of the body affected by the embryonal type was the head and neck, where 6 to 10 year-old animals were the most affected.

Se realizó el estudio histopatológico de la glándula prostática en 40 caninos mayores de 5 años de edad, remitidos para su necropsia al Laboratorio de Histopatología de la Facultad de Medicina Veterinaria de la UNMSM. Se hizo la evaluación macroscópica y se tomó medidas (largo x ancho en cm), peso (g) de la glándula, edad del animal (años) y peso corporal (kg); para establecer un Índice Prostático. La evaluación histológica se realizó tomándose muestras de la porción externa (corpus prostatae) y de la porción interna (Pars disseminata prostatae) relacionada a la luz uretral. Se utilizó las coloraciones de Hematoxilina Eosina, Picro Ponceau, Tricromico de Masson y Van Giesson. Se realizó el diagnostico histopatológico y se clasificó las siguientes alteraciones: hiperplásicas, inflamatorias, degenerativas y neoplásicas. Se diagnostico hiperplasia en un total de 33 ...