The nasal, eye fluid samples and lump samples on the skin of the cattle suspecting LSDV infection with the clinical signs, such as fever, nodules on the skin, mucous membranes and oedema of the skin were collected to identify LSDV by the conventional PCR method using the specific primers according to the guideline of OIE [6] in combination with realtime-PCR method as described previously by Alexander et al. [3]. The studied results showed that theses field samples were positive with LSDV. The Madin-Darby bovine kidney (MDBK) cell line system was used for LSDV isolation according to the guideline of OIE. The result of LSDV isolation showed that after 3 days of LSDV infection, the cytopathogenic effect (CPE) in the MDBK cell line was appeared in cell culture. The CPE caused by LSDV infection in MDBK cell line was increased at the day 5th and reached to the maximum at the day 7th. These results were re-inspected by realtimePCR and conventional PCR for LSDV diagnosis recommended by OIE in combination with the detection of 4 well-known genetic markers, such as p32, RP030, ORF103 and thymidine kinase (TK) genes of LSDV. All sequences of 4 genetic markers generated in this study were submitted to GenBank under accession Nos. MW326768,MW326766, MW326769 and MW326767 for p32, RP030, thymidine kinase and ORF103 genes, respectively. The studied results indicated that LSDV has been successfully isolated in MDBK cell line for the first time in Viet Nam.