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This research evaluated the impact of Lactobacillus starter cultures on post-acidification, viable cell counts (VCC), antioxidant activities (such as DPPH radical scavenging, Ferric Reducing Antioxidant Power (FRAP), and Ferrous Ion Chelating (FIC) activity), and sensory attributes of fermented camel milk (FCM) over a 21-day period at 4 °C. FCM was prepared with Streptococcus thermophilus and Lactobacillus delbrueckii subsp. lactis (control), as well as with three different Lactobacillus starter cultures individually: Lacticaseibacillus rhamnosus, Lacticaseibacillus casei, and Lactiplantibacillus plantarum, in co-cultures with S. thermophilus and L. delbrueckii subsp. lactis. The findings indicated that FCM with L. rhamnosus experienced the most significant pH decrease (p < 0.05) throughout the storage period. L. plantarum-FCM maintained the highest VCC (p < 0.05) compared with the other samples. Additionally, all three Lactobacillus strains showed significantly higher (p < 0.05) DPPH radical scavenging and FRAP compared with the control by the end of the storage. However, L. casei exhibited the greatest FIC activity. Among the samples, L. plantarum was rated highest in taste, flavor, and overall preference. In conclusion, the incorporation of these Lactobacillus strains into camel milk during fermentation improved bacterial viability, enhanced antioxidant properties, and boosted sensory qualities, especially for flavor and texture, positioning it as a promising functional food product.
This research evaluated the impact of Lactobacillus starter cultures on post-acidification, viable cell counts (VCC), antioxidant activities (such as DPPH radical scavenging, Ferric Reducing Antioxidant Power (FRAP), and Ferrous Ion Chelating (FIC) activity), and sensory attributes of fermented camel milk (FCM) over a 21-day period at 4 °C. FCM was prepared with Streptococcus thermophilus and Lactobacillus delbrueckii subsp. lactis (control), as well as with three different Lactobacillus starter cultures individually: Lacticaseibacillus rhamnosus, Lacticaseibacillus casei, and Lactiplantibacillus plantarum, in co-cultures with S. thermophilus and L. delbrueckii subsp. lactis. The findings indicated that FCM with L. rhamnosus experienced the most significant pH decrease (p < 0.05) throughout the storage period. L. plantarum-FCM maintained the highest VCC (p < 0.05) compared with the other samples. Additionally, all three Lactobacillus strains showed significantly higher (p < 0.05) DPPH radical scavenging and FRAP compared with the control by the end of the storage. However, L. casei exhibited the greatest FIC activity. Among the samples, L. plantarum was rated highest in taste, flavor, and overall preference. In conclusion, the incorporation of these Lactobacillus strains into camel milk during fermentation improved bacterial viability, enhanced antioxidant properties, and boosted sensory qualities, especially for flavor and texture, positioning it as a promising functional food product.
Background: Current treatments for inflammatory bowel disease (IBD) are relatively futile and the extended use of drugs may reduce effectiveness. Several probiotic strains have shown promise in relieving/treating IBD symptoms. Objectives: The current study investigated the impact of fermented soymilk with a mixture of probiotic starter cultures containing Lactobacillus rhamnosus, L. casei, L. plantarum, L. acidophilus, Bifidobacterium longum, and B. animalis subsp. lactis in rats with dextran sulfate sodium (DSS)-induced colitis compared to control. Methods: Rats were randomly assigned to five groups (5 rats/group; n = 25): G1: negative normal control; G2: positive control (DSS); G3: DSS with sulfasalazine (DSS-Z); G4: DSS with soymilk (DSS-SM), and G5: DSS with fermented soymilk (DSS-FSM). Parameters monitored included the following: the disease activity index (DAI), macroscopic and histological assessments of colitis, and a fecal microbial analysis performed to assess the severity of inflammation and ulceration. Results: The DSS-FSM rats group exhibited lower DAI scores (p < 0.05) than other treated groups during the induction period. A macroscopical examination revealed no ulceration or swelling in the intestinal mucosa of rats in the DSS-FSM-treated group, resembling the findings in the negative control group. In the positive control (DSS group), the colon tissue showed increased inflammation (p < 0.05), whereas those in the DSS-SM- and DSS-FSM-treated rats groups did not show significant macroscopic scores of colitis. The positive DSS control and DSS-Z groups had crypt erosion and ulceration areas, severe crypt damage, and epithelial surface erosion, which were absent in the negative control and DSS-FSM groups. The counts of Lactobacillus spp. and Bifidobacterium spp. remained stable in both G1 and G5 over 4 weeks. The consumption of fermented soymilk with a mixture of probiotics could minimize the severity of DSS-induced colitis in rats. Conclusion, it was found that fermented soymilk containing Lactobacilli and Bifidobacterium might be an effective vehicle for reducing the severity of DSS-induced colitis in rats.
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