In Vitro Antimicrobial Activity of Piper retrofractum Fruit Extracts against Microbial Pathogens Causing Infections in Human and Animals

Figure 2

The multiple fruit of P. retrofractum Vahl when ripe changes to a red-orange color and consists of many minuscule seeds embedded in the same receptacle (a). The column chromatography shows purified pale yellow needle-like crystal 3–12 mm alkaloid from dichloromethane and isopropanol extraction of P. retrofractum Vahl (b).

(a)

(b)