Complement fixation reaction for the diagnosis of type II avian (Marek's) leukosis

Ultrastructure of hamster kidney cell culture infected with Herpesvirus

Hamster kidney cell culture was found susceptible to infection and replication of herpesvirus of turkey (HVT) as evidenced by cytopathic effect, induction of HVT-specific, complement-fixing antigen, and demonstration of virus particles by electron microscopy. Viral structures at different developmental stages were observed. Several infected cells showed a lamellar inclusion body possibly continuous with the endoplasmic reticulum. The function of these lamellar bodies is not known.

Biogenesis of Marek's disease (type II leukosis) virus in vitro: electron microscopy and immunological study

The kinetic events involved in Marek's disease herpesvirus infection of avian cell culture were investigated by assaying viral infectivity and antigenicity as well as by electron microscopy during the infectious cycle. The levels of viral infectivity and complement-fixing (CF) antigens revealed that the rates of appearance of infectious particles and CF antigens were not synchronous. Viral specific CF antigen could be detected 5 h after infection, whereas viral infectivity or the appearance of viral particles could be demonstrated only after 10 h of infection. High proportions of the recovered CF antigens during the various stages of the infectious cycle were found to be soluble and did not sediment with the virus particles. Cytological analysis of the developmental stages of the JM virus-infected cells by thin sectioning and electron microscopy revealed that at 8 h small particles approximately 35 nm in diameter appeared in the cell nuclei. The appearance of nucleocapsids occurred at 10 h, and these were of varying shapes; however, all were approximately 100 nm in diameter. At approximately 18 h postinfection, mature virus particles were observed. Viral maturation of the immature particles occurred by the acquisition of envelope from the inner leaflet of the nuclear membrane or from the cytoplasmic membrane of the cell.

Susceptibility of guinea pig cell cultures to infection with cell-bound and cell-free herpesvirus of turkeys

Cell-bound and cell-free herpesvirus of turkeys infected and replicated in guinea pig cell cultures as evidenced by cytopathic effects, intranuclear inclusions, and the presence of herpesvirus particles as seen by electron microscopy were studied in this investigation. Further evidence for the replication of herpesvirus of turkeys in cell cultures was determined by serum neutralization, complement fixation, and the fluorescent antibody tests.

Susceptibility of mammalian (hamster) cell culture to infection with herpesvirus of turkeys

Herpesvirus of turkeys (HVT) infected and replicated in hamster kidney cells as evidenced by cytopathic effects, intranuclear inclusions, and by the presence of herpesvirus particles as seen by electron microscopy. Additional evidence for the presence of HVT in cell cultures was determined by the serum neutralization, complement fixation, and the fluorescent-antibody tests.