Medscape does require registration, but it's free.

Actually, I read the actual article and I'm surprised that this was published in a prestigious medical journal because this info is nothing new. Everyone uses the same TB registry so to understand the point I made earlier in this thread, just look at these numbers from the CDC here . Scroll down one page to Table 5. This article only covers 2001-2006 but this table I'm referring to goes back to 1993.

Even if you're not really math-savvy, I think the pattern is apparent. Just look at the number of cases among US and foreign-born Americans since 1993. The number of cases among the foreign-born is quite stable over time, but the number of cases among the US-born Americans has fallen significantly since 1993. Then look at what happens to the percentages for the foreign-born--they go up significantly even though the actual number of cases is basically the same because the overall number of cases each year has shrunken.