Newcastle disease virus (NDV) was isolated from a Japanese quail (Cotornix cotornix japonica). The effect of intracerebral and intranasal passages of the NDV in chickens on the pathogenicity was studied. Pathogenicity of the viruses of different passage levels was compared with that of the original isolate by the mean death time with the minimum lethal dose in chicken embryos, intracerebral pat...

Mycoviruses are a specific group of viruses that naturally infect and replicate in fungi. The importance of mycoviruses was revealed after their effects were identified not only in economically important fungi but also in the human pathogenic fungus Aspergillus fumigatus. The latter was shown recently to harbor at least three different types of mycoviruses including a chrysovirus, a partitiviru...

A multiplexed screening system to detect pathogenicity islands (PI) of bacteria causing enteric disease and pathogenicity factors (PF) associated with the SARS-associated coronavirus (SARS-CoV) and Rift Valley Fever Virus (RVFV) has been developed. This system is based upon the Luminex xMAPTM System, a multiplexed assay platform that combines high sample throughput (up to 600 samples/hour) with...

The molecular basis of pathogenicity of the chicken anaemia virus (CAV) needs to be clarified in order to develop a safe, live virus vaccine. In this study, several high- and low-pathogenic infectious DNA clones were obtained from field virus samples after 12 or 38 passages in MDCC-MSB1 cells. The high-pathogenic clones induced a low haematocrit, low weight gain and high mortality. Nucleotide s...

in this study, 99 isolates of rhizoctonia were recovered from root and crown samples of pistachio seedlings, and soil samples were collected from major pistachio orchards in kerman province. results revealed that 96 isolates were multinucleate and 3 binucleate. mnr belonged to ­ag-4. results of the pathogenicity tests carried out in the greenhouse, using pistachio isolates, revealed that all mn...