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Breath analysis reliably indicates presence, level of infection in mice, UCI study finds
Date:8/1/2013

Irvine, Calif., July 31, 2013 Breath analysis may prove to be an accurate, noninvasive way to quickly determine the severity of bacterial and other infections, according to a UC Irvine study appearing online today in the open-access journal PLOS ONE.

Employing a chemical analysis method developed for air pollution testing, UC Irvine microbiologists and chemists were able to correlate inflammation levels in laboratory mice to the amount of naturally produced carbon monoxide and other gases in breath samples.

The findings point to human applications of this technology in emergency rooms and intensive care units, potentially augmenting or replacing blood tests.

"Breath analysis has been showing promise as a diagnostic tool in a number of chronic diseases," said Dr. Alan Barbour, professor of microbiology & molecular genetics and medicine. "This study provides the first evidence that it can be used for rapid clinical assessment of infections, which can lead to prompt institution of effective treatments."

Barbour collaborated with UC Irvine chemist Donald Blake, utilizing a gas analysis method devised for the Rowland-Blake lab's atmospheric chemistry research, which measures the level of trace gases that contribute to local and regional air pollution. It's one of the few research groups in the world recognized for its ability to gauge precisely at the parts-per-trillion level. Previous breath sampling work by the Rowland-Blake lab has involved diabetes, cystic fibrosis and kidney failure.

Barbour believed that breath analysis could additionally be used on infections, which elicit strong inflammatory responses in the body. Several compounds, or "biomarkers," are by-products of these responses. They can be identified in blood but also detected in exhaled breath.

Studying mice with bacterial blood infections, the researchers found that increases in the severity of infection elicited significantly higher amo
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Contact: Tom Vasich
tmvasich@uci.edu
949-824-6455
University of California - Irvine
Source:Eurekalert

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