We now have systematic reviews of the role of selection in maintaining the prevalence of genes that increase risk for infectious disease (Dean et al. 2002), and progress in related areas is on the way.
A second possible explanation for the continued prevalence of thymidine analogue mutations is that the use of tenofovir and abacavir are maintaining the prevalence of such mutations in patients who have received antiretroviral therapy despite the decline in the use of zidovudine and stavudine.
Our finding contrasts with the results of 2 German studies: in rural, large-scale study areas where baits were distributed once every 3 months during 9 and 18 months, respectively, baits were effective in maintaining the prevalence of E. multilocularis in foxes at the same level as that in previous baiting campaigns conducted at intervals of 6 weeks (6, 7 ).
These results highlight the importance of prevention programs for children and adolescents, both to avoid risk behaviour and to maintain the low prevalence of hepatitis B and C among these groups of individuals.
Therefore, the HIV program for youth in Mauritius should aim to maintain the low prevalence of sexually active youth and to promote safe sexual behavior among those who are sexually active.
Its objective is to maintain the apparent salmonella prevalence below 1% in Finnish cattle and beef.
Next, we artificially added random protein pairs, while maintaining the original prevalence of signal peptides.
Amongst projects, it has added HIV/AIDS awareness towards maintaining the low prevalence rates in Somalia; eradication of female genital mutilation (FGM) towards realizing the rights of women; a youth project towards providing an alternative vision and opportunities to a generation losing out to war; and mainstreaming of gender rights in an essentially patriarchal society.
The social and cultural constraints that previously prevented black females from smoking are weakening (22, 23), especially in urban areas, and traditional constraints can no longer be relied on to maintain the relative low smoking prevalence (23).
For 90% of conditions, standardization improved or maintained the consistency of prevalence estimates, with an average prevalence difference between the two databases narrowing from 12%to1%1% after standardization.
