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Fast, accurate urine test for pneumonia possible, study finds

Doctors may soon be able to quickly and accurately diagnose the cause of pneumonia-like symptoms by examining the chemicals found in a patient's urine, suggests a new study led by UC Davis biochemist Carolyn Slupsky.

Pneumonia is a lung infection that annually sickens millions of people in the United States, resulting in approximately 500,000 hospitalizations and thousands of deaths. A rapid, accurate diagnostic test for pneumonia could save lives by enabling doctors to begin appropriate treatment earlier.

Using technology known as nuclear magnetic resonance spectroscopy, the researchers were able to identify a chemical "fingerprint" for the type of pneumonia caused by the bacterium Streptococcus pneumoniae, and compare this to the chemical fingerprints for other types of pneumonia and noninfectious lung diseases.

Findings from the study, conducted by Slupsky and colleagues in Canada and Australia, are discussed in a research profile in the December issue of the Journal of Proteome Research. A patent is pending on the diagnostic procedure.

"This is the first study to demonstrate that NMR-based analysis of metabolites in urine has the potential to provide rapid diagnosis of the cause of pneumonia," said Slupsky, an assistant professor in UC Davis' departments of Nutrition, and Food Science and Technology. She is also a faculty member in UC Davis' Foods for Health Institute.

"It also shows that we can use this technology to quickly and easily monitor patient recovery," Slupsky said. "The goal is a tool for rapid, accurate diagnosis so that patients can quickly begin treatment with the appropriate medication."

Currently, pneumonia is diagnosed by a combination of clinical symptoms, X-rays and analysis of a patient's blood or sputum by bacterial culture. Such tests usually take more than 36 hours to complete and tend to yield a high rate of false-positive results. Previous studies have shown that more than 80 percent of patients admitted to the hospital with pneumonia are misdiagnosed, leading to delays in treatment with the appropriate antibiotic.
 
 

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