from Vietnam type culture collection (Vietnam). Lactobacilli MRS broth, D-glucose,
acetonitrile, gelatin, formaldehyde and sodium chloride were from Merck (Germany).
Standard tinidazole was obtained from Institute for Drug Quality Control, Ministry of Health
(Vietnam). 0.45 µm filter membrane (Sigma, USA), dialysis tube (Sigma, USA), centrifuge
(Kubota, Japan), optical microscope (Labomed, USA), scanning electron microscope …