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. 2021 Oct 5;34(2):148–159. doi: 10.4103/tcmj.tcmj_104_21

Table 2.

List of potential probiotics with their sources, effects against various diseases, and possible mechanisms that could have prospects against coronavirus disease-19

Probiotics Sources or administered forms Effects Possible Mechanisms References
L. rhamnosus GG, B. lactis and L. acidophilus Yogurt Prevents gastrointestinal diseases, and resolved gastrointestinal well-being and digestive symptoms Modulates the immune system or the composition of gut microbiota and their bi-products [96]
L. delbrueckii, L. bulgaricus and S. salivarius thermophilus Yogurt Prevents antibiotic-associated diarrhea Modulates the gastrointestinal flora composition and immune response [98]
L. bulgaricus OLL1073R-1 and S. thermophiles Yogurt Reduces incidence of RTIs Increases IFN-γ production in serum [124]
Lactobacillus sp., and Bifidobacterium sp. Yogurt Prevents irritable bowel syndrome Exerts anti-inflammatory activities [125]
L. casei, L. plantarum, L. acidophilus, and L. delbrueckii subsp. bulgaricus, B. longum, B.breve, and B. infantis Kefir Prevents gastrointestinal diseases Enhances immune responses by enhancing epithelial barrier functions [126]
L. kimchii sp. nov. Kimchi Prevents gastrointestinal diseases Modulates the immune system by increasing NK cells and macrophages activities [127]
L. plantarum 299v Fermented oatmeal gruel Reduces incidence and duration of RTIs Helps to restore paracellular permeability of gut barrier [128]
B. breve Yakult, and L.casei Shirota Fermented drinks Reduces the duration of ventilator-associated pneumonia Enhances immune response by modulating gut microbiota [129]
L. brevis KB290 Fermented drinks Reduces incidence and duration of RTIs Enhances immune response and promote resistance against pathogen [103]
L. rhamnosus GG Probiotic juice Reduces the duration of RTIs Immunomodulatory interactions with intestinal epithelial cells [130]
L. plantarum DR7 Placebo products Selangor, Malaysia Reduces the risk of RTIs Enhances immune response by increasing plasma anti-inflammatory cytokine, and suppressing pro-inflammatory cytokine [74]
L. gasseri KS-13, B. bifidum G9-1, and B. longum MM-2 Probiotic placebo Enhances CD4+lymphocytes circulation and digestive health Produces a less inflammatory cytokine profile by changing the microbial communities in the gastrointestinal tract [131]
L. plantarum ATCC-202195 with fructooligosaccharide Probiotic placebo Prevents sepsis and reduces mortality rate Inhibits pathogen adherence and translocation [104]
L. plantarum Probiotic placebo Prevents ventilator-associated pneumonia and critical illness Inhibits pathogen adherence, modulates local and systemic immune response, and improves gut barrier function [132]
L. casei rhamnosus; L. plantarum; Synbiotic 2000FORTE; Ergyphilus; combination B. longum, L. bulgaricus, S. thermophilus Probiotic placebo Prevents ventilator-associated pneumonia and critical illness Inhibits pathogen colonization and enhance immunity [111]
S. boulardii Probiotic placebo Reduces the duration of diarrhea Stimulates intestinal secretion of immunoglobulins and brush border membrane enzymes of intestinal cells [133]
B. longum, L. bulgaricus, S. thermophiles Probiotic placebo Prevents ventilator-associated pneumonia Enhances innate immunity by modulating gut microflora [35]
L. plantarum 299 Probiotic placebo Reduces bowel symptoms and duration of stay in the intensive care unit Enhances immune response by influencing cytokine release and immunoglobulin production [134]
L. casei rhamnosus Probiotic placebo Reduces incidences of RTIs and ventilator-associated pneumonia Inhibits pathogenic growth by adhering to intestinal cells and transiently colonizing the intestinal tract [135]
L. rhamnosus GG Probiotic placebo Prevents antibiotic-associated diarrhea Enhances probiotic adherence to intestinal epithelial cells by producing soluble proteins [99]
S. boulardii Probiotic placebo Prevents antibiotic-associated diarrhea Imparts anti-inflammatory activity by modulating MAP kinase signaling pathways [136]
Lactobacillus sp., and S. boulardii Probiotic placebo Reduces the risk of antibiotic-associated diarrhea Restoration of gut microbiome, inhibition of epithelial and mucosal adherence of pathogens, lowering pH [97,100]
L. rhamnosus GG and S. boulardii Probiotic placebo Reduces the duration of acute infectious diarrhea Enhances immune response by influencing gut mucosal barrier integrity [137]
B. longum Probiotic sachet Enhances innate immunity and microbiota diversity Enhances immune response by increasing NK cells activity [138]
L. plantarum HEAL 9 and L. paracasei 8700:2 Probiotic sachet Reduces symptoms of RTIs Enhances innate immune system by increasing immune cell counts [139]
B. animalis Probiotic sachet Reduce the severity of RTIs Enhance innate immunity by interacting with gut microbiome [107]
L. rhamnosus LGG and B. animalis ssp. lactis BB-12 Probiotic sachet Reduce the severity of RTIs Prevents replication of virus and modulates immune function [140]
L. rhamnosus GG Probiotic capsule Reduce incidence of RTIs Enhances innate immunity [141]
L. rhamnosus GG Probiotic capsule Reduces the risk of RTIs Increases IFN-γ production [110]
L. rhamnosus GG Probiotic capsule Reduces the risk of RTIs Enhances innate immune system by increasing phagocytosis, cytokine production, and NK cell activity [109]
L. rhamnosus M21 Probiotic capsule Reduces the risk of RTIs Activates humoral as well as cellular immune responses [142]
C. butyricum Probiotic tablet Reduces the risk of RTIs Enhances innate immunity and microbiota diversity [112]
L. gasseri PA 16/8, B. longum SP 07/3, and B. bifidum MF 20/5 Probiotic milk Reduces the severity and duration of RTIs Increases innate immunity by increasing immune cell counts [143]
L. rhamnosus GG Probiotic milk Reduce incidence and duration of RTIs Activates mucosal innate immune responses [102]
L. johnsonii Fermented milk Reduces the infections, duration of stay in the intensive care unit and under mechanical ventilation Improves intestinal barrier and hinders pathogen adhesion [144]
B. animalis DN-173 010, B. lactis DN-173 010 Activia, Danone, USA Prevents gastrointestinal diseases, and improved gastrointestinal well-being and digestive symptoms Influences inflammatory cytokine profile and modulates gut microflora [145,146]
L. rhamnosus GG Gefilus milk, Riihimäki, Finland Reduces gastrointestinal and respiratory infections Enhances humoral and cellular immunity [147]
L. casei DN-114 001 DanActive/Actimel fermented drink, Danone, USA Reduces incidence and duration of RTIs Enhances immune response by increasing leukocytes, neutrophils, and NK cell counts and producing cytokines in serum [90,91]
L. casei DN-114001 Actimel fermented drink, Danone, USA Reduces the risk of RTIs Enhances immune response by increasing immune cell counts [148]
L. gasseri PA 16/8, B. longum SP 07/3, and B. bifidum MF 20/5 Tribion harmonis, Merck Reduces duration and severity of flu-like illness Influences immune cells to release pro- and anti-inflammatory cytokines and expresses costimulatory molecules [87]
L. rhamnosus GG Culturelle, Cromwell, USA Reduces the risk of viral RTIs and improves digestive health Enhances gut barrier integrity [101]
B. longum BB536 Morinaga milk, Tokyo, Japan Reduces the risk of RTIs Enhances innate immunity by increasing neutrophils and NK cells activities [88]
L. rhamnosus GG and B. lactis Bb-12 Enfamil; Mead Johnson Nutritionals, Evansville, IN, USA Reduces the risk of recurrent otitis media and respiratory infections Enhances mucosa-associated immune system by immunomodulation and reducing pathogen colonization [105]
P. pentosaceus 5-33:3, L. mesenteroides 32-77:1, L. paracasei ssp. paracasei 19, L. plantarum 2,362 plus inulin, oat bran, pectin, and resistant starch Medipharm, Sweden Reduces the rate of SIRS, infections, sepsis, duration of stay in the intensive care unit, under mechanical ventilation, and mortality Enhances innate immunity by modulating gut microflora and improving immunological gut barrier function [149]

L. rhamnosus: Lactobacillus rhamnosus, B. lactis: Bifidobacterium lactis, L. acidophilus: Lactobacillus acidophilus, L. delbrueckii: Lactobacillus delbrueckii, S. salivarius: Streptococcus salivarius, S. thermophiles: Streptococcus thermophiles, L. casei: Lacticaseibacillus casei, L. plantarum: Lactiplantibacillus plantarum, B. longum: Bifidobacterium longum, B. breve: Bifidobacterium breve, B. infantis: Bifidobacterium infantis, L. kimchii: Lactobacillus kimchii, L. brevis: Lactobacillus brevis, L. gasseri: Lactobacillus gasseri, B. bifidum: Bifidobacterium Bifidum, L. bulgaricus: Lactobacillus bulgaricus, S. boulardii: Saccharomyces boulardii, L. paracasei: Lacticaseibacillus paracasei, B. animalis: Bifidobacterium animalis, C. butyricum: Clostridium butyricum, L. johnsonii: Lactobacillus johnsonii, L. mesenteroides: Leuconostoc mesenteroides, P. pentosaceus: Pediococcus pentosaceus, SIRS: Systemic inflammatory response syndrome, RTIs: Respiratory tract infections, IFN-γ: Interferon gamma, MAP: Mitogen-activated protein, NK: Natural killer