As well known, genes that were recently imported through horizontal transfer would have unusual codon usages and base compositions.
This finding suggests that the MDR isolates from lineages A and C are derived from local Salmonella Typhi populations in Africa, rather than being recently imported from other regions to which this bacterium is endemic.
Interestingly, European cultured breeds originating from the live gene bank in Vodňany were recently imported to China to serve as a source for stocking into open waters throughout China (Wang et al. 2004).
Outbreaks of disease due to infectious myonecrosis virus (IMNV) were first reported from Brazil in 2004 in Pacific white shrimp Penaeus (Litopenaeus) vannamei, an exotic species to Brazil that was relatively recently imported for cultivation in earthen ponds.
The miracle substance making this proposal feasible was rubber, recently imported to France by a group of scientific men traveling in South America.
Grass carp populations are expanding still [30], however, and have probably not yet reached their full geographic potential after almost 40 yr since introduction, whereas black carp are only recently imported into North America, and are not as-yet established in natural waters.
Meanwhile, UN restrictions remain so stringent that one aid agency was recently denied permission to import door handles for the hospitals it has renovated.A minefieldYet, much as Iraqis loathe their circumstances, the fear of change could be even stronger, especially of change brought by yet another war.
Frequency-dependent modulation of transcription factor nuclear import was recently shown to coordinate the regulation of gene expression in yeast (Cai et al., 2008).
Also in France, a case of severe pulmonary toxoplasmosis in an immunocompetent man who had consumed imported raw horsemeat was recently reported [ 7].
This clearly limits the potential of these viruses to constitute a real pandemic threat as was recently illustrated in The Netherlands, where an imported case of MARV infection was rapidly contained preventing any secondary cases (Timen et al, 2008).
