Tuberculosis is changing

The Changing Picture of Tuberculosis.

Changing approaches to the diagnosis of tuberculosis.

Since this subject was last reviewed in the American Journal of Respiratory and Critical Care Medicine (1), new diagnostic tests for tuberculosis have been approved for use in the United States, Europe, and other industrialized regions, and there has been significant clinical experience with their use. In addition, several other new diagnostic assays have been studied and may be nearing approva...

The Changing Pattern of Pulmonary Tuberculosis

Study of mortality from pulmonary tuberculosis in Ontario between 1881 and 1961 reveals a steady decline in rates since the beginning of this century, affecting both sexes and all age groups. This decline has been much faster in the younger than in the older age groups. When the mortality rates are studied for groups of men and women born within 10-year periods (10-year cohorts) an orderly patt...

How is Precipitation Changing?

Observations show that changes are occurring in the amount, intensity, frequency and type of precipitation. These aspects of precipitation generally exhibit large natural variability, and El Niño and changes in atmospheric circulation patterns such as the North Atlantic Oscillation have a substantial influence. Pronounced longterm trends from 1900 to 2005 have been observed in precipitation amo...

Is El Nino changing?

Recent advances in observational and theoretical studies of El Nino have shed light on controversies concerning the possible effect of global warming on this phenomenon over the past few decades and in the future. El Nino is now understood to be one phase of a natural mode of oscillation-La Nina is the complementary phase-that results from unstable interactions between the tropical Pacific Ocea...