Stages A and B are generally susceptible to a high number of fungal pathogens, stage C is of intermediate resistance and stage D is not infectible by biotrophic leaf pathogens.    From Wordnik.com.  [1. Designing integrated pest management for sustainable and productive futures.] Reference

When Rice and his colleagues engineered mouse and human cell lines to express all four proteins, they showed that each cell line became infectible with the virus.    From Wordnik.com.  [innovations-report] Reference

Since mice and humans each have a species-specific version of the four factors, the group used hamster cells to see which combination of factors did the best job at making the cells infectible.    From Wordnik.com.  [innovations-report] Reference