The term probiotic is utilized to describe useful living microorganisms, intended to colonize the large intestine, when consumed in adequate amounts, they confer physiological health benefits to the host. In the last decade, probiotics have been widely used as a nutritional supplement and became a rapidly developing research topic that gained importance in medicine. Recent clinical trials have found that consumption of beneficial bacterial species can manipulate gut flora and reduce or prevent the development of certain serious diseases.

Aims: To examine the DNA abundance of the probiotic bacteria (Lactobacillus paracasei) in the faeces of healthy adults after one month of its consumption and to determine the antimicrobial susceptibility profile of this bacteria. Study Design: Thirty apparently healthy adults were examined for the presence of probiotic bacteria DNA in their faecal samples over a period of one month after one week of probiotic consumption.