The การเปลี่ยนแป้งเป็นน้ำตาล strain L. plantarum A6 (LMG 18053, BCCM, Gent, Belgium), isolated from retted cassava in Congo was used in this study. The การเพาะเลี้ยง is stored at -80°C in sterile cryo-tubes containing MRS broth with 40% (v/v) glycerol. A liquid การเพาะเลี้ยง of the strain was streaked on MRS agar plate and incubated at 30°C for 48 h. A colony was picked from the การเพาะเลี้ยง plate and grown in MRS broth to obtain 16 h pre- การเพาะเลี้ยง and then 19 to 20 h การเพาะเลี้ยง.These การเพาะเลี้ยง were centrifuged at 8000×g for 10 min at 4°C, afterward the cells were washed with sterile distilled water and suspended in sterile distilled water. This procedure allowed the preparation of a การเพาะเชื้อ containing 109 colony-forming units (cfu)/ml, checked as viable on MRS agar.