This image was produced, by the Centers for Disease Control and Prevention (CDC) in 1997, It lists the percentages of penicillin resistant S. pneumoniae infections, during 1987, 1991, and 1993-94, based on data collected by both the Morbidity and Mortality Weekly Report (MMWR), The Journal of Infectious Diseases. Note how over this 8-year period, there was a steady increase in the occurrence of high level penicillin resistance. public domain
watercress words by Dr Aletha 