A total of 180 serum samples collected in the period of April to September, 2004 from 12 broiler breeder flocks and commercial layers older than 50 weeks of age from ten poultry farms were tested for the presence of Reticuloendotheliosis virus (REV) antibodies using a commercial ELISA test. Only 3 samples were positive to antibodies against REV; however, the optical densities of the 3 positive samples were higher than the negative controls but below to the positive controls. ELISA serologic testing is not definitive and, therefore, it can be concluded that the 12 flocks were negative to REV antibodies. On the other hand, further studies, such as isolation and identification of the virus, are required to achieve a definitive diagnosis.

A total of 180 serum samples collected in the period of April to September, 2004 from 12 broiler breeder flocks and commercial layers older than 50 weeks of age from ten poultry farms were tested for the presence of Reticuloendotheliosis virus (REV) antibodies using a commercial ELISA test. Only 3 samples were positive to antibodies against REV; however, the optical densities of the 3 positive samples were higher than the negative controls but below to the positive controls. ELISA serologic testing is not definitive and, therefore, it can be concluded that the 12 flocks were negative to REV antibodies. On the other hand, further studies, such as isolation and identification of the virus, are required to achieve a definitive diagnosis.

It is reported the treatment of a 2-year-old male castrated domestic feline, 6.8 kg of body weight, with mediastinal lymphoma. At clinical examination, it showed a temperature of 38 °C, superficial restrictive inspiratory dyspnea, <2 s capillary refill time, heart rate of 140 beats/min, respiratory rate 62/min. In the laboratory analyzes was found leukopenia with lymphopenia and positive for the feline leukemia virus. Radiography and thoracic ultrasound showed moderate pleural effusion and a rounded hypoechoic structure with irregular edges, respectively. The thoracocentesis revealed the presence of chylothorax and the cytology by fine needle puncture of the rounded structure allowed a final diagnosis of mediastinal lymphoma. A chemotherapy was instituted with L-asparaginase, vincristine, cyclophosphamide, doxorubicin, and prednisolone. The patient underwent eight chemotherapy sessio...

Se reporta el tratamiento de un caso de un felino doméstico macho castrado de 2 años y 6.8 kg de peso vivo con linfoma mediastínico. Al examen clínico mostró temperatura de 38 °C, disnea inspiratoria restrictiva superficial, tiempo de llenado capilar <2 s, frecuencia cardiaca de 140 lat/min, frecuencia respiratoria 62/min. En los análisis de laboratorio se encontró leucopenia con linfopenia y positivo al virus de la leucemia felina. En la radiografía y ecografía torácica se encontró presencia de efusión pleural moderada y una estructura redondeada hipoecoica de bordes irregulares, respectivamente. La toracocentesis reveló presencia de quilotorax y mediante la citología por punción de aguja fina de la estructura redondeada se dio como diagnóstico final linfoma mediastínico. Se instauró una quimioterapia con L-asparaginasa, vincristina, ciclofosfamida, doxorrubicina y...