Undernutrition can affect the invading microorganism.

Undernutrition or malnutrition adversely affects host defenses against many invading microorganisms, thereby increasing the severity of infection. Studies of RNA viruses (e.g.

Elevated blood lead concentrations and vitamin D deficiency in winter and summer in young urban children.

Background: It is widely recognized that blood lead concentrations are higher in the summer than in winter. Although the effects of some environmental factors such as lead in dust on this phenomenon have been studied, relationships to sunlight-induced vitamin D synthesis have not been adequately investigated. Vitamin D status is influenced by the diet, sunlight exposure, age, skin pigmentation, and other factors, and may modify gastrointestinal lead absorption or release of lead stored in bones into the bloodstream.

Baseline behavioral assessment for the new Jersey Health Wellness Promotion Act.

Purpose: To determine baseline use rates for health-promoting behaviors of the recently adopted New Jersey Health Wellness Promotion Act and to examine the effects of demographic and socioeconomic factors on the use of preventive services included in the Act.

Design: A random telephone survey of 3094 households was conducted using questions from the Behavioral Risk Factor Surveillance System supplemented by questions related to provisions of the Act.

Setting: All New Jersey households.

Wealth from Health: an incentive program for disease and population management: a 12-year project.

The future of healthcare is linked with its ability to face the challenges of consumerism. Disease and population management will represent the dominant style of healthcare delivery in the future. This article describes the Wealth from Health programs which utilize current and future technologies to help the healthcare system become a leader in healthcare delivery and to assist many communities at an affordable cost.

Extraordinary longevity: individual and societal issues.

The likelihood of substantial increases in average life spans and the potential for profound longevity increases (to 100, 110, or 120 years on average) raises a host of societal issues. These include huge increases in the number of old and very old persons, the likelihood of a massive increase in health expenditures for the population aged 65 and older, the potential for outliving financial resources, challenges to the viability of Social Security and pensions, concerns about quality of life, and possible intergenerational antagonisms. If marked increases occur in average life spans worldwide, several billions could be added to world population at eventual stability, and that could become a sustainability issue.

Lead exposure potentiates predatory attack behavior in the cat.

Epidemiologic studies have demonstrated that environmental lead exposure is associated with aggressive behavior in children; however, numerous confounding variables limit the ability of these studies to establish a causal relationship. The study of aggressive behavior using a validated animal model was used to test the hypothesis that there is a causal relationship between lead exposure and aggression in the absence of confounding variables. We studied the effects of lead exposure on a feline model of aggression: predatory (quiet biting) attack of an anesthetized rat.

Dendritic cell amplification of HIV type 1-specific CD8+ T cell responses in exposed, seronegative heterosexual women.

In the Heterosexual AIDS Transmission Study (HATS), the frequency of high-risk sexual activity and viral load in the seropositive partner were shown to correlate with HIV-1 transmission. However, these parameters could not account for the status of some exposed, seronegative (ESN) individuals who remained uninfected despite years of exposure. To test the hypothesis that antiviral immune responses are a correlate of nontransmission in this cohort, we developed two sensitive methods for assessing HIV-1-specific humoral and cell-mediated responses.

Correlates of nontransmission in US women at high risk of human immunodeficiency virus type 1 infection through sexual exposure.

Seventeen women who were persistently uninfected by human immunodeficiency virus type 1 (HIV-1), despite repeated sexual exposure, and 12 of their HIV-positive male partners were studied for antiviral correlates of non-transmission. Thirteen women had > or = 1 immune response in the form of CD8 cell noncytotoxic HIV-1 suppressive activity, proliferative CD4 cell response to HIV antigens, CD8 cell production of macrophage inflammatory protein-1 beta, or ELISPOT assay for HIV-1-specific interferon-gamma secretion. The male HIV-positive partners without AIDS had extremely high CD8 cell counts.

Food irradiation: unresolved issues.

Food-associated diarrheal disease is a major problem in the United States. One approach offered as virtually a panacea is food irradiation. Irradiating our food would have some unequivocal benefits, but there are some important unresolved issues that must be addressed before we commit our society to a technology that could be harmful.

Status of selected nutrients and progression of human immunodeficiency virus type 1 infection.

Background: Immune function is highly dependent on nutritional status because the large mass and high rate of cellular turnover of the immune system make it a major user of nutrients. Furthermore, nutrient requirements may be increased during acute and chronic infections, including HIV-1 infection.

Objective: The current study was designed to assess relations among HIV-1 progression and 11 nutritional and demographic variables.

Applying electric and electromagnetic energy as adjuvant treatment for pressure ulcers: a critical review.

Chronic pressure ulcers are a significant health problem especially in the aging population. National estimated annual treatment costs are in the billions of dollars. Only two treatment-related recommendations receive high ratings for reported experimental evidence of validity: Use of moist wound dressings and adjunctive electrotherapy for unresponsive Stage III and IV and recalcitrant Stage II ulcers.

HIV heterosexual transmission: a hypothesis about an additional potential determinant.

Transmission rates of human immunodeficiency virus (HIV) during heterosexual intercourse vary dramatically around the world. In Asia and South America, they are extraordinarily high, whereas in the United States and Europe, rates are much lower even after a large number of unprotected contacts. The transmission rates in Africa also probably are high, but the available studies unfortunately are weak.

Counterpoint on food irradiation.

Dr. Steele's extensive argument illustrates well one side of the food irradiation controversy. The proponents and opponents are involved in a heated debate.

Dietary calcium intakes of urban children at risk of lead poisoning.

Dietary calcium is well known to decrease gastrointestinal lead absorption and thereby reduce the risk for lead poisoning. Because children in economically deprived urban centers are especially likely to have excessive lead exposure, we surveyed dietary calcium intakes of 314 children from the greater Newark, New Jersey, area. The areas of Newark and adjacent communities studied had been previously identified as containing significant sources of environmental lead by geographic information systems technology.