National Center for Biotechnology Information NCBI NLM MEDLINE Mice Inbred C57BL animals humans pubmed abstract nih national institutes of health national library of medicine research support non-u.s. gov't adult adolescent aged middle aged Bacterial DNA sensitivity and specificity Evaluation Study Bacterial / analysis Polymerase Chain Reaction / methods* pneumonia pneumococcal / diagnosis* pneumococcal / microbiology streptococcus pneumoniae / genetics j anthony g scott kenya kevin marsh lung / microbiology* bacterial proteins* pmid:12791880 pmc156539 doi:10.1128/jcm.41.6.2554-2559.2003 eric l marston adhesins carrier proteins / genetics* bacterial / isolation & purification drainage lipoproteins / genetics* membrane transport proteins*