1.   But Chapela, who is familiar with the Mexican work, said the researchers had identified the presence of DNA sequences from the cauliflower mosaic virus.

2.   One known case of a virus doing good, at least for Dutch tulip sellers, comes from the tulip mosaic virus.

3.   Some plants have variegated foliage because they have been intentionally infected with a mosaic virus, a plant disease that produces the symptom of mottled leaves or flowers.

4.   The mosaic virus is not new to the region, he said.