Shigella dysenteriae type I density in stool (log
UFC/g) over 7 days of treatment with methanol extract of Picrilima nitida (PN) and ciprofloxacin (Ciprof). Each data column represents the mean ± S.E.M. (n = 6). Data column of the same day with superscript * are significantly different compared with diarrheic control (* p < 0.05; **p < 0.01).