National Center for Biotechnology Information NCBI NLM MEDLINE humans pubmed abstract nih national institutes of health national library of medicine research support non-u.s. gov't adult female male adolescent aged middle aged 80 and over Antigens Evaluation Study community-acquired infections / microbiology chromatography / methods pneumonia pneumococcal / diagnosis* pneumococcal / microbiology streptococcus pneumoniae / isolation & purification* bacterial / urine* l b reller streptococcus pneumoniae / immunology reagent kits diagnostic community-acquired infections / diagnosis* pmid:11574562 pmc88378 doi:10.1128/jcm.39.10.3495-3498.2001 d r murdoch r t laing immunoassay / methods*