First, a hybrid strain of virus had to be developed that coupled the surface characteristics of the swine flu virus with growth characteristics from another strain more suitable for mass production.
The cheaper glucose makes this strain more competitive for industrial production.
The cheaper sugars make the strain more competitive for industrial production.
In contrast, the absence of PGM2 overexpression delayed growth on galactose for both xylose-utilizing strains, significantly more for strain Control-PPP-XYL than for strain Control-XYL, whereas their maximum specific growth rates were similar and in the same range as previously described for strains Control i and Control m, 0.21 and 0.23 h-1 respectively, [ 16] (Table 1 and 2).
However, it is notable that the variance in fitness increased with passage for each of these strains, more so for his3∆ esthanthan for chk1∆ estrainsrands, and that his3∆ estrainsrainshoweded an overall decline in fitness that plateaued around passage 15.
Patients infected with resistant strains pay more for cure, lose more from extended illness (in terms of time away from work and other activities, i.e., productivity, costs of supportive therapy), and are more likely to be disabled.
Meanwhile, the extended drought in the Southwest has strained more significant water sources for LA and other cities, such as the Colorado River system.
When antibiotics eliminate sensitive strains more quickly, the opportunity for sensitive strains to become resistant is decreased; however, once resistance has emerged, resistant strains have a stronger selective advantage.
These select for M.tb strains more fit to cause disease and be transmitted, sometimes by exploiting defence systems effective on other bacteria.
Extending the genomic analysis by incorporating whole-genome data for epidemic strains more recently isolated will help to differentiate between this and other hypotheses.
While countries are straining to pay more for imported oil, many have continuing programs to redress trade deficits and other severe economic imbalances.
