title: [Positive urine pneumococcal antigen test and vaccination].
abstract: OBJECTIVE
  Although urine pneumococcal antigen is an useful test, it has false positives such as pneumococcal vaccination.
  
  
  METHODS
  Positive urine pneumococcal antigen in Hospital de Denia (January-February/2015). We studied epidemiological, radiological and microbiological variables as well as previous pneumococcal vaccination (neumo-23 and/or neumo-13).
  
  
  RESULTS
  Urine pneumococcal antigen test was positive in 12.4% of 385 cases. Only 33.3% of positive cases had pneumonia in chest X-ray, and 35.4% of patients had previous pneumococcal vaccination. In most cases (87.5%), an antibiotic was prescribed.
  
  
  CONCLUSIONS
  Pneumococcal vaccination can produce a false positive result in the urine pneumococcal antigen test in clinical practice, leading to an unnecessary prescription of antibiotics.
authors.affiliation: Servicio de Medicina Interna, Hospital de Denia, Denia, Alicante, España. Electronic address: asalinasbotran@yahoo.es.
authors.forename: Alejandro
authors.initials: A
authors.lastname: Salinas-Botrán
authors.affiliation: Servicio de Medicina Interna, Hospital de Denia, Denia, Alicante, España.
authors.forename: Patricia
authors.initials: P
authors.lastname: Martín-Rico
authors.affiliation: Servicio de Medicina Preventiva, Hospital de Denia, Denia, Alicante, España.
authors.forename: Antonio
authors.initials: A
authors.lastname: Valdivia
authors.affiliation: Servicio de Medicina Interna, Consorcio Hospital General Universitario de Valencia, Valencia, España.
authors.forename: Ángel
authors.initials: Á
authors.lastname: Pellicer
authors.affiliation: Servicio de Microbiología, Hospital de Denia, Denia, Alicante, España.
authors.forename: Óscar
authors.initials: Ó
authors.lastname: Esparcia
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000942:Antigens, Bacterial / Q000652:urine*; D015415:Biomarkers / Q000652:urine; D002648:Child; D002675:Child, Preschool; D005189:False Positive Reactions; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D008875:Middle Aged; D022242:Pneumococcal Vaccines / Q000276:immunology*; D011018:Pneumonia, Pneumococcal / Q000175:diagnosis* / Q000382:microbiology / Q000652:urine; D013296:Streptococcus pneumoniae / Q000276:immunology*; D055815:Young Adult
chemical_list: D000942:Antigens, Bacterial; D015415:Biomarkers; D022242:Pneumococcal Vaccines
keywords: False positive; Falso positivo; Neumococo; Pneumococcus; Vaccination; Vacunación