Modified hemolytic plaque technique for the detection of bluetongue virus antibody-forming cells.

Enhanced infectivity of bluetongue virus in cell culture by centrifugation.

The effects of centrifugation of the infection of cell culture with bluetongue virus (BTV) were investigated. Baby hamster kidney cells were infected with BTV with or without centrifugation. Viral antigen was detected by immunofluorescence at 24 h in both centrifuged and noncentrifuged cultures. However, after 24 h of infection, the production of PFU in centrifuged cell cultures was 10- to 20-f...

Plaque formation by bluetongue virus.

The cytopathic changes produced by bluetongue virus were first observed by Haig, McKercher & Alexander (1956) in monolayer roller tube cultures of primary lamb kidney ce ll s. Subsequently, Fernandes (1959) described the growth and cytopathic effects of a virulent as well as a homologous egg-adapted strain at the thirtysixth passage level, in cultures of human amnion (Fernandes), Chang liver, c...

Serological survey of sheep in Iran for Type specific Antibody to Bluetongue virus

Appling real time RT-PCR for bluetongue virus detection in Iran

During 2009-10, real time RT-PCR and conventional RT-PCR techniques Used for detecting BTVs RNA in 310 blood samples. For real time and gel based RT-PCR segment-1 and segment-10 selected as conserve genes to search any BTV strains. Using these methods, 58 (%18.7) and 14 (%4.5) positive samples were detected among the clinically suspected sheep. Sensitivity of both molecular techniques evalua...

Comparison of competitive and indirect enzyme-linked immunosorbent assays for detection of bluetongue virus antibodies in serum and whole blood.

An indirect (I) enzyme-linked immunosorbent assay (ELISA) and a competitive (C) ELISA, using a group-specific monoclonal antibody against bluetongue virus (BTV), are described for the detection of antibodies to BTV in cattle and sheep sera. The performance of these assays in detecting anti-BTV antibody in sequential serum samples and eluates from whole blood (WB) dried on filter paper from thre...