One hundred years ago Peyton Rous recovered a virus, now known as the Rous sarcoma virus (RSV), from a chicken sarcoma, which reproduced all aspects of the tumor on injection into closely related chickens. There followed recovery of causal viruses of tumors of different morphology from 4 more of 60 chicken tumors. Subsequent studies in chickens of the biology of the first RSV isolated moved slo...

Seventeen avian species and two mammalian species were intranasally inoculated with the zoonotic A/chicken/Hong Kong/220/97 (chicken/HK) (H5N1) avian influenza (AI) virus in order to ascertain a relative range of susceptible hosts and the pathobiology of the resultant disease. A direct association was demonstrated between viral replication and the severity of disease, with four general gradatio...

Rat liver cells in vitro were transformed with chicken sarcoma virus B77, giving RL(B77) cells, and with murine sarcoma virus (Harvey), giving RL(MSV) cells. Rat liver cells transformed spontaneously in vitro were designated RL cells. In addition, the RL(MSV) cell line was adapted for growth in culture fluid containing 25 mug of 5-bromodeoxyuridine per ml. All cell lines were tumorigenic in 1-w...

The growth kinetics of avian infectious bronchitis (AIB) virus in vitro have been investigated previously using different systems, including embryonated chicken eggs (Hitchner and White, 1955), and cell cultures of chick embryo kidney (Lukert, 1965 ; Bulow, 1966; Akers and Cunningham, 1968) or chick embryo liver (Lukert, 1965). Organ cultures of ciliated epithelium have been employed in various...

Two systems, inoculation of bovine endothelial cells and of embryonated chicken eggs, were compared for detection of bluetongue virus (BTV) in blood specimens from experimentally inoculated sheep. For all BTV serotypes tested, embryonated chicken eggs detected longer periods of viremia than did bovine endothelial cells, primarily by detecting BTV in samples containing lower virus concentrations.

Background and Aims: Influenza virus nucleoprotein (NP) has the capacity to be used as subunit vaccine, but little is known about the impact of different cultures on its structure. In the present study we aimed to evaluate and compare the Isoelectric focusing (IEF) property of extracted viral nucleoproteins derived from Madin Darby canine kidney (MDCK) cell line and embryonated chicken eggs (EC...

Primary chicken embryo cell cultures were evaluated a s an alternate cell system for the production of attenuated Venezuelan equine encephalomyelitis (TC-83 strain) vaccine. The TC-83 strain virus was shown to remain stable during 10 serial passages in chicken embryo cell culture with regard to plaque size and morphology, virus yield, potency, and virulence for mice and hamsters.

Mammalian interleukin-7 (IL-7) is able to stimulate lymphocyte proliferation and maturation, and reverse immunosuppression. However, whether poultry IL-7 has similar functions remains unclear. Chicken infectious bursal disease virus (IBDV) causes serious immunosuppression in chicken due to virus-induced immune disorder. Whether chicken IL-7 (chIL-7) has the ability to restore the immunity durin...