title: Safety Assessment of Two New Lactobacillus Strains as Probiotic for Human Using a Rat Model.
abstract: Two previously isolated Lactobacillus strains (L. fermentum HM3 from human milk and L. buchneri FD2 from fermented dates), intended as probiotic for human, were assessed for their safety using acute and subacute oral toxicity tests in rats. In addition, their effects on cecal microflora and harmful bacterial enzymes (β-glucuronidase and β-glucosidase) of the tested animals were also determined. The results showed that L. buchneri FD2, L. fermentum HM3, or a mixture of them were safe up to a level of 1010 CFU/kg BW/day in a 14-day or 28-day treatment period. Both strains were well tolerated and there were no observed adverse effects on growth, feed consumption, cellular blood components and vital organs of the treated animals. The Lactobacillus strains were also able to reduce harmful intestinal bacterial enzymes, and decrease pathogenic bacterial populations while increasing beneficial bacterial populations. These results suggest that the two Lactobacillus strains are safe and could be potential probiotic for human.
authors.affiliation: Institute of Tropical Agriculture, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia.
authors.forename: Parisa
authors.initials: P
authors.lastname: Shokryazdan
authors.affiliation: Institute of Tropical Agriculture, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia.
authors.forename: Mohammad
authors.initials: M
authors.lastname: Faseleh Jahromi
authors.affiliation: Institute of Tropical Agriculture, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia.
authors.forename: Juan Boo
authors.initials: JB
authors.lastname: Liang
authors.affiliation: Faculty of Pharmacy, Universiti Teknologi MARA, 42300 Puncak, Alam, Selangor, Malaysia.
authors.forename: Ramasamy
authors.initials: R
authors.lastname: Kalavathy
authors.affiliation: Institute of Bioscience, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia.
authors.forename: Chin Chin
authors.initials: CC
authors.lastname: Sieo
authors.affiliation: Institute of Bioscience, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia.
authors.forename: Yin Wan
authors.initials: YW
authors.lastname: Ho
mesh_terms: D000818:Animals; D001835:Body Weight; D002432:Cecum / Q000201:enzymology / Q000382:microbiology; D005247:Feeding Behavior; D005260:Female; D006801:Humans; D007778:Lactobacillus / Q000201:enzymology; D008297:Male; D023421:Models, Animal; D019936:Probiotics; D051381:Rats; D017207:Rats, Sprague-Dawley; D013045:Species Specificity; D018675:Toxicity Tests