Streptococcal pharyngitis and gram stains.
D001431:Bacteriological Techniques / Q000191:economics*; D003362:Cost-Benefit Analysis; D006801:Humans; D010612:Pharyngitis / Q000175:diagnosis* / Q000382:microbiology; D013194:Staining and Labeling / Q000191:economics / Q000379:methods*; D013290:Streptococcal Infections / Q000175:diagnosis*; D013291:Streptococcus / Q000302:isolation & purification*