Surveillance of Streptococcus pneumoniae infection during 1974-1981.
D004352:Drug Resistance, Microbial; D006801:Humans; D008586:Meningitis, Pneumococcal / Q000453:epidemiology / Q000382:microbiology; D008826:Microbial Sensitivity Tests; D011008:Pneumococcal Infections / Q000453:epidemiology* / Q000382:microbiology; D011018:Pneumonia, Pneumococcal / Q000453:epidemiology / Q000382:microbiology; D011159:Population Surveillance; D012383:Romania; D012703:Serotyping; D013296:Streptococcus pneumoniae / Q000145:classification / Q000187:drug effects / Q000302:isolation & purification