Marasmus is a form of severe malnutrition characterized by energy deficiency. A child with marasmus looks emaciated. Body weight is reduced to less than 60% of the normal (expected) body weight for the age.Marasmus occurrence increases prior to age 1, whereas kwashiorkor occurrence increases after 18 months.arasmus is a form of severe malnutrition characterized by energy deficiency. A child with marasmus looks emaciated. Body weight is reduced to less than 60% of the normal (expected) body weight for the age.
Heath and Aging. In 2010, an estimated 524 million people were aged 65 or olderâ8 percent of the worldâs population. By 2050, this number is expected to nearly triple to about 1.5 billion, representing 16 percent of the worldâs population. Although more developed countries have the oldest population profiles, the vast majority of older peopleâand the most rapidly aging populationsâare in less developed countries.
(Aug. 12, 2009) Global population numbers are on track to reach 7 billion in 2011, just 12 years after reaching 6 billion in 1999. Virtually all of the growth is in developing countries. And the growth of the world's youth population (ages 15 to 24) is shifting into the poorest of those countries. The Population Reference Bureau's 2009 World Population Data Sheet and its summary report, to be released on Aug. 12, offer detailed information about country, regional, and global population patterns.