INTERFERENCE BETWEEN VIABLE STRAINS OF NEWCASTLE DISEASE VIRUS

Viable Newcastle Disease Vaccine Strains in a Pharmaceutical Dump

To assess the viability of discarded and buried vaccine strains, we examined vaccines that had been buried for >20 years in an industrial waste dump in the city of Milan, Italy. Viability results showed potential biological risk associated with uncontrolled burial of pharmaceutical industry waste, including some live vaccines.

Studies on the immunogenic properties of three lentogenic strains of newcastle disease virus

Identification of vaccine strains of Newcastle disease virus.

Identification of Vaccine Strains of Newcastle Disease Virus: R. P. Hanson and C. A. Brandly ....... ............................ 156 Conditioned Aversion to Saccharin Resulting from Exposure to Gamma Radiation: J. Garcia, D. J. Kimeldorf, R. A. Koelling ... ...... 157 Intolerance of Dizygotic Human Twins to Reciprocal Skin Homografts: B. 0. Rogers and G. Allen . ..................................

Plaque assay for avirulent (lentogenic) strains of Newcastle disease virus.

Avirulent (lentogenic) strains of Newcastle disease virus form plaques on chicken embryo lung monolayers in 48 to 72 h.

Interaction between cytomegalovirus and Newcastle disease virus as mediated by intrinsic interference.

Cytomegalovirus (CMV) was demonstrated to induce intrinsic interference to Newcastle disease virus (NDV) in human fibroblast cells under noncytopathic conditions. This interference is unique in that (i) cytomegalovirus is the first DNA virus demonstrated to have this property and (ii) the state of interference was transient and progressively lost as the condition of the cells changed with the d...