The primary determinant of infection for any virus is its ability to enter a cell and produce additional infectious particles.

He called the agent a prion, for proteinaceous infectious particles.

Barriers work by blocking many viruses, bacteria, and other infectious particles.

A plaque assay was used to determine the quantity of infectious particles remaining after drug treatment.

People who wished to be cautious but were less fearful might stay away from ground beef, the form most likely to contain infectious particles.

I need to do a lot more work to figure out what they are, but I wonder if they aren't some kind of infectious particle.

"It contains highly dangerous infectious particles, which could be transformed into a bioterror weapon."

This test tells one the concentration of infectious particles that have the ability to cause infection.

This step maturation is essential for the formation of infectious particles.

Still the number of infectious particles per hepatocytes might be higher in the Brown Norway rats.