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Seasonal variation in health care-associated bloodstream infection: increase in the incidence of gram-negative bacteremia in nonhospitalized patients during summer.

Abstract：

OBJECTIVE:Recent research has suggested that episodes of gram-negative (GN) bloodstream infection (BSI) are more common in the population during summer months. Our objective was to determine if the same phenomenon could be observed in patients with health care-associated (HCA) BSI, and if so, whether a summer peak was less apparent in patients accommodated in a climate-controlled hospital environment. METHODS:Data from episodes of HCA BSI spanning an 11-year period were analyzed. To test for seasonal variation in HCA BSI among hospitalized and nonhospitalized patients, and between GN and gram-positive organisms, the χ(2) goodness-of-fit test was used. RESULTS:There were 440 episodes of HCA GN BSI of which 259 (59%) occurred in inpatients and 181 (41%) occurred in noninpatients. A significant increase in the frequency of HCA GN BSI was observed in nonhospitalized patients during the summer months (P = .03) but not in climate-controlled hospitalized patients. The most common source of infection in these patents was an intravascular device (38%). CONCLUSIONS:We found an increased incidence of GN HCA BSI during summer that was not apparent in our inpatient cohort. The cause is unknown. It might be prudent to advise patients at risk of BSI (eg, those receiving intravascular infusions) to minimize exposure to high environmental temperature and to educate on possible behavioral factors that may increase risk.

journal_name

Am J Infect Control

journal_title

American journal of infection control

authors

Alcorn K,Gerrard J,Macbeth D,Steele M

doi

10.1016/j.ajic.2013.05.019

subject

Has Abstract

pub_date

2013-12-01 00:00:00

pages

1205-8

issue

12

eissn

0196-6553

issn

1527-3296

pii

S0196-6553(13)00944-9

journal_volume

41

pub_type

杂志文章

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