Hepatitis A Virus (HAV) Antigen, Concentrate, >60% Viral Protein.
Viral Strain: pHM175.
Prepared from an extraction of virus propagated in FRhK-4 cells infected with the HAV virus strain pHM175. Infected cells are harvested and the virus is partially purified prior to the inactivation with formalin. The final antigen product is prepared in Tris buffer, pH 8.0-8.5.
Various RSV differences between strains are probably of little or no practical importance from a diagnostic point of view, since available reagents, including monoclonal antibodies, react equally with all clinical isolates. RSV is recovered almost exclusively from the respiratory tract. The specimens containing the most abundant virus are secretions obtained early in the course of the illness. In general, it is more satisfactory to make a specific diagnosis of RSV infection by recovery of the virus (or identification by rapid methods) from a properly obtained and handled secretion specimen than by serological methods. Serological methods are often of secondary importance, although in large studies they may give valuable information, and in individual instances in which cultures were not obtained they may be well worth performing.