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Awasthi, A.;  Corrie, L.;  Vishwas, S.;  Gulati, M.;  Kumar, B.;  Chellappan, D.K.;  Gupta, G.;  Eri, R.D.;  Dua, K.;  Singh, S.K. Gut Dysbiosis and Diabetic Foot Ulcer. Encyclopedia. Available online: (accessed on 17 April 2024).
Awasthi A,  Corrie L,  Vishwas S,  Gulati M,  Kumar B,  Chellappan DK, et al. Gut Dysbiosis and Diabetic Foot Ulcer. Encyclopedia. Available at: Accessed April 17, 2024.
Awasthi, Ankit, Leander Corrie, Sukriti Vishwas, Monica Gulati, Bimlesh Kumar, Dinesh Kumar Chellappan, Gaurav Gupta, Rajaraman D. Eri, Kamal Dua, Sachin Kumar Singh. "Gut Dysbiosis and Diabetic Foot Ulcer" Encyclopedia, (accessed April 17, 2024).
Awasthi, A.,  Corrie, L.,  Vishwas, S.,  Gulati, M.,  Kumar, B.,  Chellappan, D.K.,  Gupta, G.,  Eri, R.D.,  Dua, K., & Singh, S.K. (2022, December 07). Gut Dysbiosis and Diabetic Foot Ulcer. In Encyclopedia.
Awasthi, Ankit, et al. "Gut Dysbiosis and Diabetic Foot Ulcer." Encyclopedia. Web. 07 December, 2022.
Gut Dysbiosis and Diabetic Foot Ulcer

Diabetic foot ulcer (DFU) is a multifactorial disease and one of the complications of diabetes. The global burden of DFU in the health sector is increasing at a tremendous rate due to its cost management related to hospitalization, medical costs and foot amputation. Hence, to manage DFU/DWs, various attempts have been made, including treating wounds systematically/topically using synthetic drugs, herbal drugs, or tissue engineering based surgical dressings. However, less attention has been paid to the intrinsic factors that are also the leading cause of diabetes mellitus (DM) and its complications. One such factor is gut dysbiosis, which is one of the major causes of enhancing the counts of Gram-negative bacteria. These bacteria produce lipopolysaccharides, which are a major contributing factor toward insulin resistance and inflammation due to the generation of oxidative stress and immunopathy.

diabetic foot ulcer pathogenesis sources of probiotics therapeutic potential of probiotics on DFU market status of probiotics patents on probiotics

1. Introduction

Diabetic foot ulcer (DFU) is the one of the most common complications of diabetes. The global prevalence of DFU due to diabetes is 25%. It is an open sore wound that occurs in the foot. It generally occurs due to the hypoxia and oxidative stress caused by reactive oxygen species, a decrease in the level of growth factors (GFs), nucleic acids and the lack of glycemic control. DFU has reached the 10th position in terms of the annual economic burden of diabetics [1]. this situation has arisen because of a lack of existing treatment strategies to promote wound healing. In DFU, delayed wound healing occurs [2]. The common reason for this is the extended inflammatory response that leads to impairment in keratinocyte migration, collagen synthesis, vascularization, fibroblast migration, epithelialization, collagen proliferation, differentiation and migration. Overall, these contributing factors often result in amputation and even the death of the DFU patient. The global prevalence of amputation due to DFU in 2022 is reported to be 10–15% [3].
The treatment of DFU is challenging, as it involves multiple stages, etiologies and degrees of severity that vary among the diabetic mellitus (DM) patients. The existing formulations on the market provide adequate glycemic control. However, these are unable to treat the various stages of DFU in DM patients. Therefore, this increases the burden of medications on patients suffering to DFU, because the delay in wound healing may also be dependent on the severity of the wound, rather than only glycemic control. Hence, for wound healing, the administration of antibiotics or anti-inflammatory agents is also required. Other approaches that are used to manage DFU include plastic surgery, orthopedics, vascular surgery, offloading, antibiotics (ciprofloxacin, vancomycin, clindamycin and piperacillin/tazobactam), herbal drugs (curcumin, quercetin, aloe vera, achlefan and panchavalkla), synthetic drugs (mevastatin, simvastatin, naltrexone and azelnidipine), growth factors (GFs), nucleic acids gene based delivery, novel drug delivery systems (NDDSs) such as nanostructured lipid carriers, nanoemulsion, nanoparticles and dressings such as gauze, films, foams or, hydrocolloid-based dressings as well as polysaccharide- and polymer-based dressings etc. The limitation of surgery is that in DM patients, there is a slow progression of wound healing. Once the patient has undergone surgery, the wounds take a long time to heal, leaving the patient susceptible to infections. The limitation of synthetic and herbal drugs is their poor solubility and permeability, while the limitations of GFs and nucleic acid are their high cost and low stability. The limitation associated with the NDDS is their low retainability at the injured site, if used topically; additionally, to enhance their retention, they have to be further incorporated into nanomaterials, which increases the cost of therapy. Dressings which are currently available to manage DFU have some limitations, such as the inability to absorb the exudate and high cost. Antibiotics can decrease microbial load but not heal the wound [1][2][3]. These treatment strategies are expensive and underline the need for a multi-disciplinary, cost-effective approach to control hyperglycemia with the potential to target different stages of DFU. In recent years, probiotics have gained tremendous attention for the management of various metabolic diseases due to their anti-infective, antioxidant, anti-inflammatory, anti-diabetic and immunomodulatory activities. In the case of DFU, probiotics help to maintain the levels of short chain fatty acids, gut hormones and the endocannabinoid system that helps in maintaining glucose homeostasis, decreasing inflammation and providing immunity to the DFU patients. Probiotics are part of various food products that are consumed on a daily basis. They help to manage gut microbiota function and impart immunomodulation. They also have a commercial status in the form of probiotic drinks and foods [4]. Despite having such potential, they have been clinically less explored for their potential in the management of DFU.

2. Pathogenesis of Diabetic Wounds

During hyperglycemia, the levels of micro-ribulose nucleic acid (miR)-155, miR-191, miR-200b, miR-15b, miR-200, and miR-205–5p are increased while those of miRNA-146a and miR-132 are decreased. The overactivation of miR-155, miR-191 and miR-200b results an increase in the level of myeloperoxidase (MPO)-positive cells and C-reactive protein levels, which, in turn, leads to impairment in angiogenic markers such as collagen 1, transforming growth factor (GF) beta-1 and alpha-smooth muscle actin. In addition, they prolong the inflammatory phase of wound healing and impede the wound healing process. Besides these factors, the overactivation of miR-15b, miR-200 and miR-205–5p results in the impairment of the vasoendothelial GF pathways and impedes the wound healing process. The decrease in the levels of miRNA-146a and miR-132 activates the tumor necrosis factor receptor-associated factor 6 (TRAF6), interleukin-1 receptor associated kinase 1 (IRAK1) and toll-like receptors. The overactivation of these pathways results in an increase in the level of inflammatory markers that prolongs the inflammatory phase and delays the wound healing process [3]. In addition to this, in DFU, the level of matrix mettalo proteinase (MMP) also gets increased, which inhibits the migration of keratinocytes toward the wound site and impairs collagen synthesis. This delays the wound healing process [1].
High blood glucose levels also result in idiopathic complications, viz. neuropathy, immunopathy and vasculopathy. Neuropathy affects sensory, motor and autonomic nerves. In sensory neuropathy, there is a loss of pain leading to unnoticed trauma, which, in turn, may lead to ulcer formation. In motor neuropathy, weakness and wasting of intrinsic foot muscles occur, which results in abnormal gait and foot deformities that can lead to ulceration. In autonomic neuropathy, sweat glands get suppressed, which results in a decrease in the sweating rate at the foot site. This makes the skin dry and brittle and leads to secondary infections and, finally, ulceration. Vasculopathy is a general term used to describe any disease affecting blood vessels. It is generally of two types: microanginopathy and macroanginopathy. Microanginopathy occurs when there is deposition of glycoproteins and blood clots on the surface of the basement of the vessels. This deposition makes the walls of the vessels thicker and causes leakage from them, leading to ulceration. Macroanginopathy includes the deposition of fats and blood clots in the blood vessels. This decreases the blood flow in the vessels, which leads to necrosis and, finally, ulceration. In the case of immunopathy, there is a decrease in immunity due to the decrease in the level of polymorpholeukocytes, intracellular killing rate and GFs, coupled with an excess of metalloproteinases. This prolongs the inflammatory phase and delays the wound healing process (Figure 1) [2].
Figure 1. (A) Pathogenesis of DFU (B) Gut dysbiosis and its relation with pathogenesis of DFU and (C) the role of probiotics in the treatment of DFU. ↑ indicates upregulation and symbol ↓ indicates downregulation.

3. Therapeutic Potential of Probiotics in Treating DW

DW is associated with oxidative stress, inflammation and immunopathy. Hence, probiotics can play a major role in the therapy of DW. Probiotics have multiple therapeutic actions, such as antioxidant, anti-inflammatory, immunomodulatory and antidiabetic (Figure 1) [5]. Probiotics exert antioxidant effects by decreasing the oxidative stress generated by mitochondrial dysfunction and reactive oxygen species. It is known that SOD has a short half-life and low bioavailability. They enhance the antioxidant effect by releasing antioxidant enzymes such as SOD and catalase. In mitochondrial dysfunction, oxidative stress is produced by the generation of superoxide reactive oxygen species. When probiotics are consumed, SOD enzymes are produced that help in the breakdown of superoxide ions into hydrogen peroxide and water, thereby decreasing oxidative stress. Therefore, probiotics are suitable for the local delivery of SOD in bowel-related disease. In addition, probiotics also produce catalase enzymes that help in cellular antioxidant defense and promote the decomposition of hydrogen peroxide, which, in turn, inhibits the production of hydroxyl radicals by Fenton reaction. Probiotics also produce antioxidant metabolites such as glutathione butyrate and folate. These metabolites eliminate hydrogen peroxide, peroxynitrite and hydroxyl radicals with the help of selenium-dependent glutathione peroxidase enzyme and reduce oxidative stress [6].
Nuclear factor-kappa B (NF-ĸB) is a key signaling channel which is responsible for inflammation. It is present in the cytoplasm in an inactive form, bound to an inhibitory molecule, i.e., IĸB. During inflammation, IĸB molecule breaks down, which results in the release of NF-ĸB to activate the inflammatory cascades. A probiotics strain such as Lactobacillus rhamnosus GG or Lactobacillus casei DN-114 001 inhibits the breakdown of the inhibitory molecule- IĸB and reduces the expression of proinflammatory cytokines such as IL-8. In addition, probiotics trigger toll-like receptors, which initiate beta-defensins and exert anti-inflammatory actions [7].
Probiotics exert immunomodulatory actions by interacting with antigen presenting and release chemical mediator cytokines such as interleukins (ILs), tumor necrosis factor, interferons, transforming GF and chemokines from immune cells (lymphocytes, granulocytes, macrophages, mast cells, epithelial cells, and dendritic cells (DCs)), which further regulate the innate and adaptive immune system. In addition, probiotics help in enhancing the production of cytokines, activate the tight junctions of the intestinal barrier against intercellular bacterial invasion, encourage the secretion of immunoglobulin A and production of antibacterial substances and compete with new pathogenic microorganisms for enterocyte adherence. Through these processes, probiotics regulate intestinal epithelial health. An early, innate immune response is also induced by probiotics through phagocytosis, polymorphonuclear (PMN) cell recruitment and tumor necrotic factor-alpha production [8].
Probiotics have an anti-diabetic effect because they help in the production of SCFA, which enhances the release of incretin hormones that influence glucose levels. In addition, probiotics reduce the level of LPS, making them useful for the treatment of gut dysbiosis and type 2 diabetes mellitus. Probiotics also help to increase the levels of GLP-1 and insulinotropic hormones in enteroendocrine L-cells [9]. This optimizes glucose metabolism, reduces cell damage and improves insulin sensitivity. Among several animal models used for DM, it has been reported in 91 research papers that probiotics prevent DM onset by down-regulating certain inflammatory cytokines, such as interferons (IFN) and IL-2 or IL-1, or by increasing anti-inflammatory IL-10 production. It is also claimed that probiotics produce a defensive wall that prevents pathogenic bacterial species from colonizing the epithelium [10].
Studies related to the antioxidant, anti-inflammatory, immunomodulation and anti-diabetic property of probiotics are depicted in the Table 1.
Table 1. Probiotic compositions, indicating their pharmacological activity and their outcomes.
Probiotic Strain Assay Results References
Antioxidant effect      
Bacillus amyloliquefaciens,
Starmerella bombicola, and
Lactobacillus brevis
  • ABTS antioxidant activity tests of Bacillus amyloliquefaciens (400 µg/mL) showed 1.01-, 1.03- and 1.05-fold increases in antioxidant activity in comparison to Lactobacillus brevis, Starmerella bombicola and blueberry fruit extract without probiotic bacteria
  • A DPPH radical assay revealed that Bacillus amyloliquefaciens (1600 µg/mL) led to an increase in antioxidant activity by 1.01-, 1- and 1.23-fold as compared to Lactobacillus brevis, Starmerella bombicola, and blueberry fruit extract without probiotic bacteria
Bifidobacterium breve, Rhamnosus GG, Probionebacterium freudenreichii and Lactobacillus retueria, DPPH, ABTS
  • A DPPH antioxidant scavenging assay revealed that Probionebacterium freudenreichii (100 µg/mL) strain led to 1.01-, 1.12-, 1.06-, 1.05- and 1.04-fold increases in antioxidant activity in comparison to Lactobacillus retueria, Bifidobacterium breve and Lactobacillus rhamnosus, ascorbic acid, and butylated hydroxytoluene
  • ABTS antioxidant activity tests of Probionebacterium freudenreichii ( (100 µg/mL) strain revealed an increase in antioxidant activity by 1-, 1-, 1.06-, 1.01- and 1.01-fold as compared to Lactobacillus rhamnosus, Lactobacillus retueria, Bifidobacterium breve, ascorbic acid, and Butylated hydroxytoluene
  • TAOC results revealed that BV led to 1.17-, 1.11- and 2.5-fold increase in antioxidant activity in comparison to BS2, BS1and saline-treated group (Control)
  • MDA study: BS2 treated groups showed 3.6-, 1.05- and 1.11-fold decreases in MDA level as compared to control, BS1 and BV1 treated groups
  • SOD study showed that BS2 treated groups exhibited an increase in antioxidant activity by 1.7-, 1.2- and 1.4-fold in comparison to control, BS1 and BV1 treated groups
Enterococcus faecium DPPH, Superoxide, Hydroxyl scavenging assay
  • DPPH assay showed that Enterococcus faecium (10 mg/mL) led to a 1.08-fold increase in antioxidant activity as compared to ascorbic acid
  • Superoxide scavenging assay revealed Enterococcus faecium (10 mg/mL) led to a 1.13-fold increase in antioxidant activity in comparison to ascorbic acid
  • Hydroxyl scavenging assay result revealed that Enterococcus faecium (10 mg/mL) led to a 1.42-fold in antioxidant activity as compared to ascorbic acid
Lactobacillus acidophilus DPPH
  • SY (0.2 mg/mL) led to a 1.16-, 1- and 1.04-fold increase in antioxidant activity in comparison to control, SWY and WY, respectively
Lactobacillus plantarum, Lactobacillus rhamnosus, Lactobacillus casei, DPPH
  • DPPH assay revealed that Lactobacillus rhamnosus (0.1 mg/mL) led to a 1.21-, 1.19- and 1.46-fold increase in antioxidant activity as compared to Lactobacillus casei, Lactobacillus plantarum and cashew milk-yoghurt without probiotic strain
Lactobacillus plantarum DM5 DPPH, Superoxide anion, Hydroxyl
  • Lactobacillus plantarum DM5 (1010 CFU/mL) has 20% and 30% higher hydroxyl radical activity than Lactobacillus acidophilus and Lactobacillus plantarum
  • Lactobacillus plantarum DM5 (1010 CFU/mL) showed 31% and 22% higher superoxide anion scavenging activity than Lactobacillus Plantarum and Lactobacillus acidophilus
  • Lactobacillus plantarum DM5 (1010 CFU/mL) exhibited an increase in DPPH scavenging activity by 43% and 33%, as compared to Lactobacillus plantarum and Lactobacillus acidophilus
Lactobacillus paracasei A-4, Lactobacillus plantarum A-7, Lactobacillus paracasei BL-12, Lactobacillus paracasei DU-8, Lactococcus lactis T-8 DPPH
  • Lactobacillus plantarum A-7 1 mg/mL) exhibited increase in antioxidant activity by 1.22-, 2.81-, 3.19-, 1.01-, 3.47- and 5.41-fold as compared to Lactobacillus paracasei A-4, Lactobacillus paracasei BL-12, Lactobacillus paracasei DU-8, Lactobacillus brevis O-9, Lactococcus lactis T-8 and Control milk respectively
Probiotic strain Design/
Results References
Bifidobacterium animalis ssp.
lactis 420 (900 billion CFU/day)
  • Improved bacterial dysbiosis and immunity
  • Reconstructed the balance of intestinal flora
Lactobacillus acidophilus La-5
and Bifidobacterium BB-12 (106 CFU/g each)
Randomized double-blind/210
  • Decreased inflammation
  • Increased bacterial count in the intestine and colon
Lactobacillus acidophilus, Lactobacillus casei, Bifidobacterium bifidum, Lactobacillus fermentum (2 × 109 CFU/g each) Randomized double-blind/48
  • Improved glucose homeostasis.
  • Decreased oxidative stress and inflammation
Lactobacillus acidophilus, Lactobacillus infantis, Bifidobacterium bifidum, Lactobacillus fermentum and Bifidobacterium longum (6 billion CFU each) Randomized double-blind/
  • Decreased proinflammatory mediators of inflammation
Lactobacillus plantarum OLL2712 (5 × 109 CFU) Randomized/
  • Decreased chronic inflammation
  • Decreased HbA1c level
Immunomodulatory effect      
Probiotics strain Animal model/other Results References
Bifidobacterium longum KACC 91563(100 billion CFU/g) Male BALB/c mice
  • Improved systemic immunity
  • Regulated T and B-cell proliferation
  • Inhibited the Th1cytokine imbalance and immune cytokine production
Bifidobacterium longum CCUG 52486 (5 × 108 CFU/day) Human
  • Increased NK cell activity
  • Increased the number of IgG+ memory B-cells
Lactobacillus casei Shirota (1.3 × 1010 CFU/day) Human
  • Increased innate immunity by increasing levels of natural killer cell activity
  • Increased inflammatory status by promoting IL-10/IL-12 ratio
Lactobacillus casei; CRL 431 (109 cells/day) Female BALB/c mice
  • Increased mucosal activity
  • Maintain homeostasis at the mucosal level
  • Increased phagocytosis
  • Increased IL-10 levels
Limosilactobacillus fermentum
(109 CFU/mL)
Female Balb/c mice
  • Modulated inflammatory cytokines
  • Stimulated response of the immune system
Antidiabetic effect      
Probiotic strain Animal model Results References
Lactobacillus casei (4.0 × 109
  • ↓BGL
Lactobacillus casei and Bifidio bifidum (1 × 107 cfu/mL) Wistar rat
  • ↓ BGL, ↓ HbA1c, ↓ TC, ↓ TGs
  • ↓ LDL, ↓ VLDL, ↑ HDL
Lactobacillus.casei (109 CFU/mL) Mice
  • ↓ BGL, ↓ insulin
  • ↓ insulin-like growth factor I, ↓ C-peptide
Lactobacillus casei CCFM419 (109 CFU) Mice
  • ↓ Fasting and postprandial blood glucose
  • ↓ glucose intolerance, ↓ IR, ↓ TNFα, ↓ IL-6, ↑ GLP-1
Lactobacillus. Gasseri (6 × 107 cfu/g) Rat
  • ↓ BGL, ↓ IR, ↓ inflammation
  • ↑ SCFA, ↑ insulin secretion
Lactobacillus plantarum CCFM0236 (8 × 109 cfu/mL) Mice
  • ↓ Food intake, ↓ BGL, ↓ HbA1c, ↓ leptin level, ↓ insulin level
  • ↓ TNFα, ↓ HOMA-IR index, ↑ activities of GPx
Lactobacillus.plantarum, strain Ln4 (5 × 108 cfu/day) Male mice
  • ↓ Weight gain, ↓ epididymal fat mass, ↓ total plasma TG level
  • ↓ HOMA-IR, ↑ glucose tolerance, ↑ insulin response
Lactobacillus.plantarum MTCC5690 and Lactobacillus fermentum MTCC5689 (1.5 × 109 colonies/day) C57BL/6J male mice
  • ↓ IR, ↓ glucose intolerance, ↓ glucose level, ↓ lipid level, ↓ TNFα ↓IL6
  • ↑ gene expression patterns of intestinal tight junction
Lactobacillus.rhamnoss, Lactobacillus.acidophilus, Bifidio bifidumi (6 × 108 CFU each) Mice
  • ↓ Intestinal permeability, ↓ LPS translocation, ↓ low-grade systemic inflammation
  • ↓ glucose tolerance, ↓ hyperphagic behavior, ↓ hypothalamic insulin, and leptin resistance
ABTS 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic) acid, CFU/g; Colony forming units/gram, TAOC; Total antioxidant capacity, MDA; maleic dialdehyde, GSH-PX; Glutathione peroxidase, SOD; Superoxide dismutase, BS1; Bacillus subtilis1, BS2; Bacillus subtilis2, BV; Bacillus velezensisis, SY; Probiotic fat-free yogurt, SWY; Probiotic semi-fat yogurt, WY; Probiotic full fat yogurt; DPPH; 2,2-DiPhenyl-2-Picryl hydrazyl hydrate. Here sign ↓ indicates decrease in the level and ↑ indicates increase in the level.
With regard to the therapeutic potential of probiotics, various studies have been carried out in the field of DW healing, which are discussed below.
In one of these studies, Peral et al. (2010) investigated the effect of Lactobacillus plantarum against chronic infected leg ulcers in diabetic patients. In their trial, 14 diabetic and 20 non-diabetic patients having venous leg ulcers were considered. For the treatment, topically Lactobacillus plantarum was applied to both diabetic and non-diabetic patients with venous leg ulcers. After 30 days of topical treatment with Lactobacillus plantarum, it was observed that 43% of diabetics and 50% of non-diabetic patients showed complete wound healing. Therefore, it was concluded that Lactobacillus plantarum accelerated wound healing in diabetic and non-diabetic patients by exerting antibacterial and anti-inflammatory actions, reducing apoptotic, neutrophils, and necrotic cells and modifying IL-8 production [37].
In another study, Majid et al. (2016) examined the effect of Lactobacillus casei and its exopolysaccharide against DW in induced male Wistar diabetic rats. The results revealed that the topical application of Lactobacillus casei and its exopolysaccharide showed 1.4-fold and 1.1-fold increase in wound contraction within 14 days as compared to negative and control groups [38].
Similarly, Mohseni et al. (2018) investigated the effect of probiotic supplementation on metabolic status and wound healing in patients with DFU. They performed a double-blind, randomized and placebo-controlled trial. In their trial, 60 patients aged 40–85 years old and having grade 3 (deep ulcer with cellulitis) DFU were considered. These 60 patients were casually distributed into two groups (30 patients on each side) to receive either placebo or oral probiotic capsule (Lactobacillus fermentum, Lactobacillus casei, Lactobacillus acidophilus, and Bifidobacterium bifidum) every day for 12 weeks. The dose of the probiotic capsule was 2 × 109 CFU/g each. After 12 weeks, it was observed that compared to the placebo group, the probiotics-treated groups showed a significant reduction in ulcer length (−1.3 ± 0.9 cm for probiotic vs. −0.8 ± 0.7 cm for placebo, p = 0.01), ulcer width (−1.1 ± 0.7 cm for probiotic vs. −0.7 ± 0.7 cm for placebo, p = 0.02) and ulcer depth (−0.5 ± 0.3 cm for probiotic vs. −0.3 ± 0.3 cm for placebo, p = 0.02). Moreover, it was also observed that probiotics not only reduced the ulcer length, size and depth, but also helped in the downregulation of blood glucose level, total serum cholesterol, high sensitivity C-reactive protein (hs-CRP), malondialdehyde (MDA) levels, augmented plasma nitric oxide (NO) and total antioxidant capacity (TAC), indicating the potential of probiotics in treating DFU [39].
In another study, Gonzalez et al. (2018) explored the effect of clindamycin/cefotaxime and Lactobacillus acidophilus against micro-organisms isolated from the foot of DFU patients. The turbidimetric method was used for the bioassay. Three types of bacteria were isolated from DFUs strain, i.e., strain 1 (Pseudomonas sp.), strain 2 (yeast-like cell) and strain 3 (Enterobacter sp.). Then, clindamycin/cefotaxime and Lactobacillus acidophilus were tested against micro-organisms isolated from the foot of DFU patients. Clindamycin was used against all the strains isolated from DFU patients at concentrations of 0.15 μg/mL, 0.25 μg/mL, and 50 μg/mL. It was observed that clindamycin was only effective against strain three; the percentages of inhibition were 18, 88, and 89, respectively. Meanwhile, cefotaxime at concentrations of 0.15 μg/mL, 0.25 μg/mL, and 50 μg/mL showed an effect against all the three strains. The percentages of inhibition of cefotaxime at a dose of 0.15 μg/mL against strains 1, 2 and 3 were 85, 70 and 55, respectively. At a dose of 0.25 μg/mL cefotaxime showed a good percentage of inhibition against strains 1, 2 and 3, i.e., 87, 68, and 60, respectively. At a dose, 50 μg/mL cefotaxime showed percentages of inhibition for strains 1, 2 and 3 of 88, 65 and 76, respectively. When Lactobacillus acidophilus was tested against all these at concentrations of 40 mg/mL, 400 mg/mL, and 800 mg/mL, it was observed that it was only effective against strains 1 and 3. For strains 1 and 3, Lactobacillus acidophilus showed percentages inhibition of 3% and 9%, respectively, at a dose of 40 mg/mL. At dose of 400 mg/mL, Lactobacillus acidophilus showed percentages of inhibition against strains 1 and 3 which of 34 and 18, respectively. Similarly, at a dose of 800 mg/mL, Lactobacillus acidophilus showed 40% inhibition for strain 1 and 26% inhibition for strain 3, indicating the antibacterial potential of probiotics against the micro-organisms that are responsible for DFU [40].


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