genetic susceptibility to marek's disease virus of local chickens in taiwan.marek's disease is a contagious disease in chickens caused by marek's disease virus (mdv) infection. invasion of very virulent mdv (vvmdv) was considered to be a major cause of vaccine break, resulting in a large economic loss in the poultry industry. two strains of the vvmdv (strains ltb-1 and lts-1) have been reported in taiwan, causing early mortality and formation of lymphoid tumors in broilers and layers. in this study, we report the susceptibility of local chickens in taiwan to inoculation ...19968883787
first isolation and characterization of very virulent marek's disease virus in taiwan.isolation of very virulent marek's disease virus (vvmdv) was carried out by inoculating blood and spleen samples of marek's disease (md) chickens onto chicken embryo fibroblast cell cultures and into the peritoneal cavity of one-day-old chicks. seven isolates of mdv were isolated in this experiment. by the results of cytopathic effect and fluorescent antibody tests, the 7 isolates were divided into 3 serotypes: serotype 1 of strains ltb-1, -2, -3, lts-1, and -2; serotype 2 of strain ltb-4; and s ...19968916003
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