That's because people need certain strains of staph or strep bacteria either in or on their bodies in order to be at risk of developing this very rare bacterial infection, says Nichole Tyson, MD, OB/GYN and pediatric-adolescent gynecologist at Kaiser Permanente in Northern California.
A second receptor needed for the entry of HIV into cells was identified and named "fusin" (CXCR4) because it enables certain strains of HIV to fuse with and enter immune cells called T cells.
These issues were highlighted during the recent anthrax exposures, when 60 days of therapy was recommended after exposure, with a drug (e.g., ciprofloxacin) that was selected because of concerns about potential resistance in certain strains of B. anthracis (87).
Sets of genes found only in certain strains of a bacterial species are of special interest because their gain or loss can change bacterial phenotypes and evolutionary potentials in ways not typically achievable by point mutation alone [1].
Certain strains of staphylococci, however, are resistant to penicillin.
Scientists believe certain strains of this virus cause nearly all cervical cancers.
I grew up in Philadelphia in an era when certain strains of genealogical pedigree counted for more than money.
For Gunn, in particular, those touchstones are clear: Michael Chapman, Mike Cooper, John Fahey and Robbie Basho, Moby Grape, certain strains of reggae, the Grateful Dead.
To clarify: only certain strains of Staphylococcus aureus are known collectively as MRSA (methicillin-resistant Staphylococcus aureus).
This includes certain strains of sustainability, design, and manufacture, notions of socially responsible engineering, and artisanal food.
