A high percentage of Khmer outbreak V. cholerae strains showed resistance to trimethoprim-sulfamethoxazole; the strains that acquired the dfrA1 gene cassette likely became predominant through selective pressure (16, 24 ).
Natural selection focuses its selective pressure on producing optimal reproductive fitness in the mating members of any species.
The predominant self-incompatibility nature of forest trees is directly related to selective pressure to maintain genetic variability (Bawa 1974).
CTL responses exerting strong selective pressure emerged early and led to rapid escape, proliferated rapidly and were predominant during acute/early infection.
The child HIV variant evolved shortly after treatment with 2 NRTIs to a predominant species also carrying the G190A mutation, which confers resistance to all NNRTI, albeit in the absence of NNRTI selective pressure.
Selective pressure due to gillnet disentanglement essentially counters the pressures of harvest selection, particularly in females.
The selective pressure of NBS-LRR genes in the five Rosaceae genomes demonstrated different selection pressures.
Therefore, the shift of predominant MRSA clones, which also led to the shift in types of SCC mec elements at NTUH, might be caused by selective pressure from antimicrobial drugs, especially fluoroquinolones.
In most cases, the source of selective pressure is unknown.
