Burnt-Out Nurses Linked to More Hospital Infections

HealthDay – 1 hr 50 mins ago TUESDAY, July 31 (HealthDay News) -- Burnout among nurses is linked to an increase in hospital infection rates, researchers have found.

In addition, job-related exhaustion among nursing staff costs millions of health care dollars each year, according to the study from the Center for Health Outcomes and Policy Research at the University of Pennsylvania School of Nursing.

In conducting the study, the researchers analyzed data from the Pennsylvania Health Care Cost Containment Council and the American Hospital Association Annual Survey. They also examined a 2006 survey of more than 7,000 registered nurses from 161 Pennsylvania hospitals that provided insight into their job-related attitudes, including feelings on depersonalization and personal accomplishment. The survey also revealed the nurses' levels of emotional exhaustion, which is a key factor in burnout syndrome.

The study showed that among nurses caring for an average of 5.7 patients, for every additional patient they were assigned there was roughly one additional catheter-associated urinary tract infection per 1,000 patients. This translates to 1,351 more infections every year, according to study co-author Jeannie Cimiotti of the New Jersey Collaborating Center for Nursing and Rutgers School of Nursing in Newark, N.J., and her colleagues at the University of Pennsylvania School of Nursing.

Each 10 percent increase in a hospital's high-burnout nurses was associated with almost one more catheter-related infection and two more surgical site infections for every 1,000 patients each year, the investigators noted in a news release from the Association for Professionals in Infection Control.

Catheter-related urinary tract infections cost an average of $749 to $832 each, and surgical site infections can cost up to $29,443. Based on those figures, the researchers projected that 4,160 infections could be prevented and hospitals could save $41 million by reducing rates of nursing staff burnout to 10 percent from an average of 30 percent.

"Health care facilities can improve nurse staffing and other elements of the care environment and alleviate job-related burnout in nurses at a much lower cost than those associated with health care-associated infections," Cimiotti and colleagues concluded. "By reducing nurse burnout, we can improve the well-being of nurses while improving the quality of patient care."

The study was published in the August issue of the American Journal of Infection Control.

While the study uncovered an association between nursing staff burnout and infections among patients, it did not prove a cause-and-effect relationship.

More information

The U.S. Centers for Disease Control and Prevention has more about health care-related infections.

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Hormone plays surprise role in fighting skin infections

ScienceDaily (May 23, 2012) — Antimicrobial peptides (AMPs) are molecules produced in the skin to fend off infection-causing microbes. Vitamin D has been credited with a role in their production and in the body's overall immune response, but scientists at the University of California, San Diego School of Medicine say a hormone previously associated only with maintaining calcium homeostasis and bone health is also critical, boosting AMP expression when dietary vitamin D levels are inadequate.

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The finding, published in the May 23, 2012 online issue of Science Translational Medicine, more fully explains how the immune system functions in different situations and presents a new avenue for treating infections, perhaps as an alternative to current antibiotic therapies.

The immunological benefits of vitamin D are controversial. In cultured cell studies, the fat-soluble vitamin provides strong immunological benefits, but in repeated studies with humans and animal models, results have been inconsistent: People with low levels of dietary vitamin D do not suffer more infections. For reasons unknown, their immune response generally remains strong, undermining the touted immunological strength of vitamin D.

Working with a mouse model and cultured human cells, Gallo and colleagues discovered why: When levels of dietary vitamin D are low (it's naturally present in very few foods), production of parathyroid hormone (PTH), which normally helps modulate calcium levels in blood, is ramped up. More PTH or a related peptide called PHTrP spurs increased expression of AMPs, such as cathelicidin, which kill a broad spectrum of harmful bacteria, fungi and viruses.

"No one suspected a role for PTH or the PTH-related peptide in immunity," said Richard L. Gallo, MD, PhD, professor of medicine and chief of UCSD's Division of Dermatology and the Dermatology section of the Veterans Affairs San Diego Healthcare System. "This may help resolve some of the controversy surrounding vitamin D. It fills in the blanks."

For example, the findings relate to the on-going debate over sun exposure. Sunlight triggers the production of vitamin D. Low levels of vitamin D have been claimed in some studies to increase the risk of cardiovascular disease and cancer, but other studies have failed to confirm this. On the other hand, high levels of solar exposure that could increase vitamin D have been shown to increase the risk of skin cancer.

"Since sunlight is a carcinogen, it's a bad idea to get too much of it," said Gallo. "PTH goes up when levels of vitamin D from diet and sun exposure are low. PTH may be what permits us to have low D in the diet and not kill ourselves with too much UV radiation."

Gallo said PTH's newly revealed immunological role provides a new connection between the body's endocrine system (a system of glands secreting different regulatory hormones into the bloodstream) and its ability to fight invasive, health-harming pathogens.

While much more work remains to be done, including human studies, it's possible that PTH or PTHrP might eventually become an effective antibiotic treatment without the risk of antibiotic resistance in targeted microbes. One challenge would be how to specifically limit treatment to the targeted infection. "Maybe that could be done by developing the therapy as a cream," Gallo said.

Co-authors of the study are Beda Muehleisen, Carolos Aguilera and George Sen, Division of Dermatology, UC San Diego; Daniel D. Bikle, Department of Medicine and Dermatology, UC San Francisco; Douglas W. Burton, Veterans Administration San Diego Healthcare System; Leonard J. Deftos, Veterans Administration San Diego Healthcare System and Department of Medicine, UC San Diego.

This research has been funded in whole or in part by the National Institute of Allergy and Infectious Diseases, National Institutes of Health (NIH), under contract number HHSN272201000020C to the Atopic Dermatitis Research Network and grant numbers R01 AI052453 and R01 AI0833358; the National Institute of Arthritis and Musculoskeletal and Skin Diseases, NIH, under grant numbers R01 AR052728; and the Veterans Administration Merit Award (ID:1145995). Additional funding was received from the State of California Tobacco-Related Disease Research Program (#18XT-0182) and the Swiss National Science Foundation (PBZHP3-125571 and PASMP3_140073).

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