HOUSEHOLD FOOD SECURITY IN THE UNITED STATES, 2003

Eighty-nine percent of American households were food secure throughout the entire year in 2003, meaning that they had access, at all times, to enough food for an active, healthy life for all household members. The remaining households were food insecure at least some time during that year. The prevalence of food insecurity, 11.2 percent of households, was not statistically different from the 11.1 percent observed in 2002. The prevalence of food insecurity with hunger was unchanged at 3.5 percent. This report, based on data from the December 2003 food security survey, provides the most recent statistics on the food security of U.S. households, as well as on how much they spent for food and the extent to which food-insecure households participated in Federal and community food assistance programs. Survey responses indicate that the typical food-secure household in the U.S. spent 34 percent more on food than the typical food-insecure household of the same size and household composition. Just over one-half of all food-insecure households participated in one or more of the three largest Federal food assistance programs during the month prior to the survey.Food security, food insecurity, hunger, food pantry, emergency kitchen, material well-being, Food Stamp Program, National School Lunch Program, WIC, Food Security and Poverty,

HOUSEHOLD FOOD SECURITY IN THE UNITED STATES, 2001

Eighty-nine percent of American households were food secure throughout the entire year 2001. The rest were food insecure at least some time during the year, meaning they did not always have access to enough food for active, healthy lives for all household members because they lacked sufficient money or other resources for food. The prevalence of food insecurity rose from 10.1 percent in 1999 to 10.7 percent in 2001, and the prevalence of food insecurity with hunger rose from 3.0 percent to 3.3 percent during the same period. This report, based on data from the December 2001 food security survey, provides the most recent statistics on the food security of U.S. households, as well as on how much they spent for food and the extent to which food-insecure households participated in Federal and community food assistance programs. Survey responses indicate that the typical food-secure household in the United States spent 32 percent more than the typical food-insecure household of the same size and household composition. About one-half of all food-insecure households participated in one or more of the three largest Federal food assistance programs during the month prior to the survey. About 19 percent of food-insecure households 2.8 percent of all U.S. households obtained emergency food from a food pantry at some time during the year.Food security, food insecurity, hunger, food spending, food pantry, soup kitchen, emergency kitchen, material well-being, Food Stamp Program, National School Lunch Program, WIC, Food Security and Poverty,

HOUSEHOLD FOOD SECURITY IN THE UNITED STATES, 2002

Eighty-nine percent of American households were food secure throughout the entire year 2002, meaning that they had access, at all times, to enough food for an active, healthy life for all household members. The remaining households were food insecure at least some time during that year. The prevalence of food insecurity rose from 10.7 percent in 2001 to 11.1 percent in 2002, and the prevalence of food insecurity with hunger rose from 3.3 percent to 3.5 percent. This report, based on data from the December 2002 food security survey, provides the most recent statistics on the food security of U.S. households, as well as on how much they spent for food and the extent to which food-insecure households participated in Federal and community food assistance programs. Survey responses indicate that the typical food-secure household in the U.S. spent 35 percent more on food than the typical food-insecure household of the same size and household composition. Just over one-half of all food-insecure households participated in one or more of the three largest Federal food assistance programs during the month prior to the survey. About 19 percent of food-insecure households3.0 percent of all U.S. householdsobtained emergency food from a food pantry at some time during the year.Food security, food insecurity, hunger, food spending, food pantry, soup kitchen, emergency kitchen, material well-being, Food Stamp Program, National School Lunch Program, WIC, Food Security and Poverty,

Household Food Security in the United States, 2005

Eighty-nine percent of American households were food secure throughout the entire year in 2005, meaning that they had access, at all times, to enough food for an active, healthy life for all household members. The remaining households were food insecure at least some time during that year. The prevalence of food insecurity declined from 11.9 percent of households in 2004 to 11.0 percent in 2005, while the prevalence of very low food security remained unchanged at 3.9 percent. This report, based on data from the December 2005 food security survey, provides the most recent statistics on the food security of U.S. households, as well as on how much they spent for food and the extent to which food-insecure households participated in Federal and community food assistance programs. Survey responses indicate that the typical food-secure household in the U.S. spent 34 percent more on food than the typical food-insecure household of the same size and household composition. Just over one-half of all food-insecure households participated in one or more of the three largest Federal food assistance programs during the month prior to the survey. About 22 percent of food-insecure households— 3.5 percent of all U.S. households—obtained emergency food from a food pantry at some time during the year.Food security, food insecurity, food spending, food pantry, hunger, soup kitchen, emergency kitchen, material well-being, Food Stamp Program, National School Lunch Program, WIC, Food Security and Poverty,

Household Food Security in the United States, 2006

Eighty-nine percent of American households were food secure throughout the entire year in 2006, meaning that they had access at all times to enough food for an active, healthy life for all household members. The remaining households (10.9 percent) were food insecure at least some time during the year. About one-third of food insecure households (4.0 percent of all U.S. households) had very low food security—meaning that the food intake of one or more adults was reduced and their eating patterns were disrupted at times during the year because the household lacked money and other resources for food. Prevalence rates of food insecurity and very low food security were essentially unchanged from those in 2005. The typical food-secure household spent 31 percent more on food than the typical food-insecure household of the same size and household composition. Just over half of all food-insecure households participated in one or more of the three largest Federal food and nutrition assistance programs during the month prior to USDA’s annual Food Security Survey.Food security, food insecurity, food spending, food pantry, soup kitchen, emergency kitchen, material well-being, Food Stamp Program, National School Lunch Program, WIC, Agricultural and Food Policy, Consumer/Household Economics, Food Security and Poverty,

Household Food Security in the United States, 2007

Eighty-nine percent of American households were food secure throughout the entire year in 2007, meaning that all household members had access at all times to enough food for an active, healthy life. The remaining households (11.1 percent) were food insecure at least some time during the year. About one-third of food-insecure households (4.1 percent of all U.S. households) had very low food security—meaning that the food intake of one or more adults was reduced and their eating patterns were disrupted at times during the year because the household lacked money and other resources for food. Prevalence rates of food insecurity and very low food security were essentially unchanged from those in 2005 and 2006. The typical food-secure household spent 35 percent more on food than the typical food-insecure household of the same size and household composition. Just over half of all food-insecure households participated in one or more of the three largest Federal food and nutrition assistance programs during the month prior to the survey.Food security, food insecurity, food spending, food pantry, soup kitchen, emergency kitchen, material well-being, Food Stamp Program, National School Lunch Program, WIC, Agricultural and Food Policy, Consumer/Household Economics, Food Consumption/Nutrition/Food Safety, Food Security and Poverty,

Household Food Security in the United States in 2010

An estimated 85.5 percent of American households were food secure throughout the entire year in 2010, meaning that they had access at all times to enough food for an active, healthy life for all household members. The remaining households (14.5 percent) were food insecure at least some time during the year, including 5.4 percent with very low food security—meaning that the food intake of one or more household members was reduced and their eating patterns were disrupted at times during the year because the household lacked money and other resources for food. The prevalence rate of very low food security declined from 5.7 percent in 2009, while the change in food insecurity overall (from 14.7 percent in 2009) was not statistically significant. The typical food-secure household spent 27 percent more on food than the typical food-insecure household of the same size and household composition. Fifty-nine percent of all food-insecure households participated in one or more of the three largest Federal food and nutrition assistance programs during the month prior to the 2010 survey.Food security, food insecurity, food spending, food pantry, soup kitchen, emergency kitchen, material well-being, SNAP, Food Stamp Program, National School Lunch Program, WIC, Food Security and Poverty,

A Complete Pathway Model for Lipid A Biosynthesis in Escherichia coli

Lipid A is a highly conserved component of lipopolysaccharide (LPS), itself a major component of the outer membrane of Gram-negative bacteria. Lipid A is essential to cells and elicits a strong immune response from humans and other animals. We developed a quantitative model of the nine enzyme-catalyzed steps ofEscherichia colilipid A biosynthesis, drawing parameters from the experimental literature. This model accounts for biosynthesis regulation, which occurs through regulated degradation of the LpxC and WaaA (also called KdtA) enzymes. The LpxC degradation signal appears to arise from the lipid A disaccharide concentration, which we deduced from prior results, model results, and new LpxK overexpression results. The model agrees reasonably well with many experimental findings, including the lipid A production rate, the behaviors of mutants with defective LpxA enzymes, correlations between LpxC half-lives and cell generation times, and the effects of LpxK overexpression on LpxC concentrations. Its predictions also differ from some experimental results, which suggest modifications to the current understanding of the lipid A pathway, such as the possibility that LpxD can replace LpxA and that there may be metabolic channeling between LpxH and LpxB. The model shows that WaaA regulation may serve to regulate the lipid A production rate when the 3-deoxy-D-manno-oct-2-ulosonic acid (KDO) concentration is low and/or to control the number of KDO residues that get attached to lipid A. Computation of flux control coefficients showed that LpxC is the rate-limiting enzyme if pathway regulation is ignored, but that LpxK is the rate-limiting enzyme if pathway regulation is present, as it is in real cells. Control also shifts to other enzymes if the pathway substrate concentrations are not in excess. Based on these results, we suggest that LpxK may be a much better drug target than LpxC, which has been pursued most often