The antigens of the Egypt virus have been detected by means of the fluorescent antibody technique in the neurons of the brain and spinal cord, in both sensory and motor areas, of infected mice. The antigens have also been observed in infected human epidermoid carcinoma cells in culture. In both cases the antigens occurred in the cytoplasm of the cells exclusively. In the early stages of infecti...

background: potency test for control of rubella vaccine is a significant factor to qualify production line and vaccination pro­gram. for this reason, who recommends to use the microtitration method by both vaccine companies and control laborato­ries. then the study was done to improve this test. methods: three rubella virus samples, including an in-house standard, a lot of vaccine and an in- pr...

mass vaccination against viral infections such as mumps is a very noticeable and appropriate attempt in common health. mumps infection has severe complications like deafness, infertility and meningitis. attenuated live vaccine of mumps is produced and used to prevent the problems. viral content in the monovalent vaccine is assayed with different methods. nowadays international standards introdu...

The preparation of the first monoclonal antibody (MAb) against the orthomyxovirus-like infectious salmon anaemia (ISA) virus is described. Characterization of the MAb included isotyping, enzyme-linked immunosorbent assay (ELISA), immunofluorescent staining of virus infected cell cultures (SHK-1 cells), immunoelectron microscopy (IEM) of negatively stained virus preparations, virus neutralizatio...

A method was devised which allows the measurement, by direct and indirect fluorescence assay, of the binding of fluorescein-coupled antibodies directed against cell-membrane antigens. The systems used were: (1) species-specific antigens, (2) genetically determined isoantigens, (3) virus-determined, tumor-specific antigens, and (4) membrane-bound immunoglobulin in a Burkitt cell line. Titration ...

  White Spot Virus (WSV) is currently the most serious viral pathogen of shrimp worldwide it causes mortality up to 100% within 7-10 days in commercial shrimp farms. Infected Indian white shrimp Fenneropenaeus indicus samples were collected from Guatr shrimp site in Sistan and Baluchestan province in south of Iran and WSV infection was confirmed by Nested PCR. WSV was isolated from infected shr...

Sequential titration of infective virus and complement-fixing antigen in brain and liver of suckling mice infected with the following virus strains-Dugbe (a new arbovirus), Congo (related to Crimean hemorrhagic fever virus), yellow fever, dengue 1 and dengue 2-showed a progressive increase in titer after infection. High titers of both infective virus and complement-fixing antigen were demonstra...

Monolayer indirect immunoperoxidase (liP) assays were developed for the improvement of routine viral isolation and titration. The instant identification of virus with increased sensitivity ( 10-100 fold) was the characteristic of liP. Polyclonal chicken antiserum reacted with all the avian adenoviruses (FA V) strains studied. Viral isolation and titration was made possible without the need of b...