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J Infect Chemother. 2009 Apr;15(2):108-12. doi: 10.1007/s10156-009-0672-1. Epub 2009 Apr 25.

The efficacy of high-dose penicillin for community-acquired pneumonia diagnosed by pneumococcal urine antigen test.

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  • 1Department of Internal Medicine and Clinical Immunology, Yokohama City University Graduate School of Medicine, 3-9 Fukuura, Kanazawa-ku, Yokohama, 236-0004, Japan.


We analyzed the efficacy of both the Streptococcus pneumoniae urine antigen test as a quick diagnostic tool and the administration of high-dose penicillin in response to a positive S. pneumoniae urine antigen test. We conducted a retrospective analysis of 48 cases of pneumococcal pneumonia, in which the patients were treated with high-dose penicillin. All the cases were diagnosed by a positive urine antigen test. Treatment with high-dose penicillin was effective in 43 of the 48 patients. This treatment was also effective in 12 of 16 culture-confirmed cases with low susceptibility to penicillin. Eleven patients who were positive for the S. pneumoniae urine antigen test but culture-negative showed clinical improvement with high-dose penicillin. Pneumonia caused by S. pneumoniae appeared to be treated safely and effectively with high-dose penicillin based on positive results of the urine antigen test, as penicillin resistance was unlikely to be a problem.

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