PMID: 30212045Sep 1, 2016Paper

Retrospective Study of Clinical Features and Prognosis of Pneumococcal Pneumonia Among Patients Under 65 Years of Age

Kansenshōgaku zasshi. The Journal of the Japanese Association for Infectious Diseases
Minako SaitoKen Ohta

Abstract

The 23-valent pneumococcal polysaccharide vaccine (PPSV23) for elderly people has been included in the National Immunization Program (NIP) of Japan since October 2014. Targets for PPSV23 were restricted to persons ≥65 years of age and persons 60 to 64 years of age with an underlying severe physical disability (expressed as 1st grade in Japan). In this study, the clinical courses of non-target persons <65 years of age were compared between those with non-severe underlying diseases (A group) and those without underlying diseases (B group), and the need to expand the targets for PPSV23 within the NIP was investigated. Persons with pneumococcal pneumonia who were diagnosed based on a positive sputum or blood culture result were enrolled between January 2004 and April 2014. As a result, the number of subjects in A group was 2.6 times larger than that in B group, and this difference was especially pronounced (4.2 times) among subjects between the age of 60 to 64 years. These findings suggest that persons with underlying disease without a 1st grade physical disability might also be susceptible to pneumococcal pneumonia. No significant differences in the severity of pneumonia, the length of treatment, or the rates of admission were see...Continue Reading

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