title: (1)H NMR spectroscopy in the diagnosis of Pseudomonas aeruginosa-induced urinary tract infection.
abstract: The utility of (1)H NMR spectroscopy is suggested and demonstrated for the diagnosis of Pseudomonas aeruginosa in urinary tract infection (UTI). The specific property of P. aeruginosa of metabolizing nicotinic acid to 6-hydroxynicotinic acid (6-OHNA) is exploited. The quantity of 6-OHNA produced correlates well with the viable bacterial count. Other common bacteria causing UTI such as Escherichia coli, Klebsiella pneumonia, Enterobacter aerogenes, Acinetobacter baumanii, Proteus mirabilis, Citrobacter frundii, Enterococcus faecalis, Streptococcus gp B and Staphylococcus aureus do not metabolize nicotinic acid under similar conditions. The method provides a single-step documentation of P. aeruginosa qualitatively as well as quantitatively. The NMR method is demonstrated on urine samples from 30 patients with UTI caused by P. aeruginosa.
authors.affiliation: Centre of Biomedical Magnetic Resonance, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Raebareli Road, Lucknow 226 014, India.
authors.forename: Ashish
authors.initials: A
authors.lastname: Gupta
authors.forename: Mayank
authors.initials: M
authors.lastname: Dwivedi
authors.forename: G A
authors.initials: GA
authors.lastname: Nagana Gowda
authors.forename: Archana
authors.initials: A
authors.lastname: Ayyagari
authors.forename: A A
authors.initials: AA
authors.lastname: Mahdi
authors.forename: M
authors.initials: M
authors.lastname: Bhandari
authors.forename: C L
authors.initials: CL
authors.lastname: Khetrapal
mesh_terms: D015415:Biomarkers / Q000378:metabolism; D015169:Colony Count, Microbial / Q000379:methods*; D006801:Humans; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D009525:Niacin / Q000378:metabolism; D009539:Nicotinic Acids / Q000378:metabolism*; D011522:Protons; D011552:Pseudomonas Infections / Q000175:diagnosis* / Q000378:metabolism* / Q000382:microbiology; D011550:Pseudomonas aeruginosa / Q000302:isolation & purification / Q000378:metabolism; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014552:Urinary Tract Infections / Q000175:diagnosis* / Q000378:metabolism / Q000382:microbiology*
chemical_list: D015415:Biomarkers; D009539:Nicotinic Acids; D011522:Protons; D009525:Niacin; C046300:6-hydroxynicotinic acid