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Bovine feedlots are intensive production systems of significant importance in Mexico. The present study describes the presence of bovine virus diarrhea (BVD) causing subacute to chronic lesions in feedlot cattle, associated with other pathologies. Animals included in this study were discarded after they received therapy several times due to chronic pneumonia, or anaplamosis. Bovine virus diarrhea antigen was identified by immunohistochemistry in small intestine and myocardium in six cases of chronic suppurative bronchopneumonia with extensive areas of casseous necrotic bronchiectasis, previously diagnosed as Mycoplasma bovis pneumonias (retrospective group, n = 6). Furthermore, based on characteristic histopathologic lesions other nine cases were included (prospective group, n = 9). Bovine virus diarrhea antigen was recognized in two animals with pneumonic lesions, including a case with fibrinous bronchopneumonia as well as suggestive lesions of infectious bovine rinotracheitis (1/9), and another one with suppurative bronchopneumonia and myocarditis suggestive of Histophilus somni (1/9). In addition, one positive case was associated to anaplasmosis (1/9). Other two positive cases showed a conspicuous fibrinous peritonitis (2/9). The rest of the animals in this group resulted negative (4/9). Histopathological characteristics of the lesions and their association with the antigen in situ confirm the presence of BVD. This presentation is compatible with the acute infection syndrome. This is the first report of BVD infection and concomitant pathologies in feedlot cattle in Mexico. [ABSTRACT FROM AUTHOR]

Se presentan los antecedentes, las manifestaciones clínicas, los hallazgos patológicos e histopatológicos, así como los resultados de los estudios complementarios de tres animales representativos de un problema de mortalidad en ganado de carne en un rancho localizado en el municipio de Aldama, Tamaulipas, durante el primer trimestre de 2008. El diagnóstico presuntivo en dos casos fue babesiosis y en el otro fue rabia. La zona es considerada endémica para ambas enfermedades. Los resultados demostraron que el problema primordial fue rabia (3/3); sin embargo, en dos de ellos (2/3) también se registró la presencia de Babesia bovis. En zonas endémicas, la presencia de ambas enfermedades, rabia paralítica bovina y babesiosis ocurre simultáneamente haciendo difícil el diagnóstico. [ABSTRACT FROM AUTHOR]

Copyright of Veterinaria México is the property of Facultad de Medicina Veterinaria y Zootecnia UNAM and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Veterinaria México is the property of Facultad de Medicina Veterinaria y Zootecnia UNAM and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Se describe un caso de miositis osificante localizada en un perro de raza Weimaraner, macho, de ocho años de edad. El animal fue originalmente remitido con diagnóstico presuntivo de hernia. La lesión era un nódulo subcutáneo firme con 5 cm de largo por 3 cm de ancho, localizada en los músculos del perineo derecho. Después del estudio radiológico la lesión fue interpretada como una neoplasia originada de vértebras coccígeas. Su dureza se constató durante el procedimiento quirúrgico para eliminar la neoformación. La lesión se extirpó parcialmente y la muestra se remitió a patología. La masa era dura, bien delimitada, vascularizada y con tejido muscular a su alrededor. El estudio histopatológico reveló osificación heterotópica con zonas de atrofia, degeneración y necrosis muscular, alternando con zonas de osificación trabecular en la periferia, limitadas por abundante tejido conectivo fibroso. Estos hallazgos son característicos de la miositis osificante localizada. Este caso constituye el primer informe de esta condición patológica en un perro en México, similar a la miositis osificante localizada en humanos [ABSTRACT FROM AUTHOR]

Copyright of Veterinaria México is the property of Facultad de Medicina Veterinaria y Zootecnia UNAM and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Veterinaria México is the property of Facultad de Medicina Veterinaria y Zootecnia UNAM and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)