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. 2024 May 21;24:505. doi: 10.1186/s12879-024-09259-3

Table 2.

Table of study characteristics

Author and Publication Year Study Design Study Location Subject Characteristics Intervention Follow-up Duration Outcomes
Study Phase Blinding Parameter used Cure Results
a. H. pylori infections with single probiotic regimen (Bifidobacterium)
Cekin et al., 2017 [6] NR Single- blind Antalya, Turkey

159 patients were diagnosed with H. pylori via endoscopic gastric biopsies

Group I (ERA + Probiotic) as I:

- n: 53

- mean ± SD age: 47.7 ± 14.0

- 45.3% were males

Group II (ERA + Placebo) as C:

- n: 52

- mean ± SD age: 46.4 ± 13.4

- 51.9% were males

Group III (ERA only):

- n: 54

- mean ± SD age: 46.3 ± 11.9

- 44.4% were males

All patients received 2 weeks of STT with amoxicillin 1000 mg + PPI (Pantoprazole 40 mg) in the first week and then metronidazole 500 mg + clarithromycin 500 mg + PPI 40 mg in the second week)

At the same time, the patients were divided into three arms:

Group I (ERA + Probiotic):

Patients received a probiotic supplement with Maflor® (7 × 109 CFU B. animalis subsp. lactis B94; 1 capsule/day)

Group II (ERA + Placebo):

Patients received placebo treatment (1 capsule/day)

Group III (ERA only):

Patients received no additional treatments

4 weeks after the end of therapy Evaluation of the H. pylori status was repeated via a 14C UBT

I (Group I): 86.8%

P (Group II): 69.2%

p-value: 0.003 (S)

Chitapanarux et al., 2015 [9] NR Double blind Chiang Mai, Thailand

63 patients with dyspeptic complaints

Intervention group:

- mean ± SD age: 52.6 ± 11.3

- 45.2% were males

Placebo group:

- mean ± SD age: 49.4 ± 13.3

- 43.7% were males

1 week-standard triple therapy (esomeprazole 40 mg, amoxicillin 1000 mg, clarithromycin 500 mg) twice a day + 4 weeks-probiotics Combif AR® (B. longum BB536; 2 capsules/twice a day or placebo; 2 capsules/twice a day, or as a placebo 4 weeks after the end of the eradication therapy Evaluation of the H. pylori status was repeated via a 13C UBT

I: 93.33%

P: 73.33%

p-value: 0.040 (S)

Dajani et al., 2013 [11] NR Single- blind Dubai, Uni Emirates Arab

206 patients with upper gastrointestinal symptoms

Group A (as Control/placebo):

- n: 106

- mean age: 37.2

- 48.1% were males

Group B (as Intervention):

- n: 100

- mean age: 37.3

- 51% were males

Group C ():

- n: 100

- mean age: 37.3

- 51% were males

Group D ():

- n: 76

- mean age: 38.3

- 50% were males

All patients received 2 weeks of STT with PPI, amoxicillin 1000 mg, clarithromycin 500 mg, or metronidazole 400 mg) twice a day

Then, the patients were divided into four arms:

Group A (STT only or as placebo group):

Patient received no additional treatments

Group B (as Intervention group):

Patients received a probiotic supplement with

B. infantis 2036 at 3 × 109 CFU (twice daily) for 10 days

Group C:

Patients were planned for a lead-in period of 2 weeks with probiotic B. infantis 2036 at 3 × 109 CFU (twice daily) alone, then followed by triple therapy combined with B. infantis as an adjuvant (same as in group B) for the subsequent 10 days

Group D:

Patients treated with STT regimen together with B. infantis 2036 at 3 × 109 CFU (twice daily) for 10 days

6–8 weeks after the end of the eradication therapy Evaluation of the H. pylori status was repeated via a 14C UBT

I: 83%

C: 68.9%

p-value: 0.001 (S)

b. H. pylori infections with single probiotic regimen (Lactobacillus)
Deguchi et al., 2012 [12] NR Single- blind Kanagawa, Japan

229 patients diagnosed with an H. pylori infection

Intervention group:

- mean age: 55.9

- 66.1% were males

Placebo group:

- mean age: 57.8

- 57.9% were males

1 week: STT (rabeprazole 10 mg, amoxicillin 570 mg, clarithromycin 200) + 4 weeks-probiotics (L. gasseri OLL2716 yogurt; 112 g) twice daily (3 weeks pretreatment followed by 1 week during eradication therapy), or as a placebo 8 weeks after the end of the eradication therapy Evaluation of the H. pylori status was repeated via a 13C UBT

I: 85.6%

P: 74.5%

p-value: 0.041 (S)

Emara et al., 2014 [15] NR Double-blind Zagagig, Egypt

213 patients with dyspeptic symptoms

Group A (as Intervention):

- mean age: 33.2 ± 13.9

-37.1% were males

Group B (as Placebo):

- mean age: 36.9 ± 11.1

- 31.4% were males

2 weeks-STT (omeprazole 20 mg, amoxicillin 1000 mg, clarithromycin 500 mg) twice a day + 4 weeks-probiotics 1 capsule of L. reuteri DSM 17938, L. reuteri ATCC PTA 6475, 1 × 108 CFU twice a day (2 weeks probiotics alone, then followed by 2 weeks during eradication therapy), or as a placebo 4 weeks after the end of the eradication therapy Evaluation of the H. pylori status was used GSRS score

I: 74.3%

P: 65.7%

p-value: 0.603 (NS)

Francavilla et al., 2014 [17] NR Double-blind Bari, Italy

478 consecutive patients with dyspepsia

Intervention group:

- mean age: 49.0

- 36% were males

Placebo group:

- mean age: 44.0

- 42% were males

1 weeks-STT (clarithromycin, amoxicillin, and PPI) + probiotics (L. reuteri DSM 17938 and L. reuteri ATCC 6475, dose 2 × 108 CFU) 1 capsule daily, or as a placebo 4 weeks after the end of the eradication therapy Evaluation of the H. pylori status was repeated via a 13C UBT

I: 76.7%

P: 67.4%

p-value: > 0.050 (NS)

Ismail et al., 2023 [28] NS Double Blind Kuala Lumpur, Malaysia

90 patients diagnosed with an H. pylori infection

Probiotic group:

- median age: 49 (37.5–68.8)

- 52.6% were males

2 weeks STT (amoxicillin clarithromycin, esomeprazole) + 4 weeks- 1 capsule (200 mg) probiotic or placebo once daily 8 weeks from baseline of eradication Evaluation of the H. pylori status was repeated via a 14C UBT

I: 93.2%

P: 68.9%

p-value: < 0.001 (S)

c. H. pylori infections with single probiotic regimen (Saccharomyces)
Seddik et al., 2019 [48] NR Single-blind Rabat, Morocco

199 patients with H. pylori infection confirmed by endoscopic gastric biopsy

Intervention group:

- mean age ± SD: 43.2 ± 13.2

- 46.7% were males

Placebo group:

- mean age ± SD: 46.3 ± 13.8

- 53.2% were males

10 days: STT (omeprazole 20 mg, amoxicillin 1 g) twice daily for 5 days, then followed by twice daily 5 days of triple therapy (omeprazole 20 mg, clarithromycin 500 mg, metronidazole 500 mg) + 10 days of probiotics (S. boulardii 250 mg), or as a placebo 4 weeks after the end of the eradication therapy Evaluation of the H. pylori status was repeated via a 13C UBT

I: 87.5%

P: 78.9%

p-value: 0.040 (S)

Zhao et al., 2021 [66] NR Double-blind Hubei, China(Torres et al., 2014)

360 patients with H. pylori infection

Group B (as Intervention):

- mean age ± SD: 45.3 ± 11.5

- 50.9% were males

Group A (as Placebo):

- mean age ± SD: 46.7 ± 12.8

- 54.3% were males

2 weeks- SQT (esomeprazole 20 mg, amoxicillin 1 g, clarithromycin 500 mg, bismuth potassium citrate) + 2 weeks- probiotics (S. boulardii 500 mg), or as a placebo 4 weeks after the end of the eradication therapy Evaluation of the H. pylori status was repeated via a 13C/14C UBT

I: 94.2%

P: 89.7%

p-value: 0.146 (NS)

Zojaji et al., 2013 [67] NR Single- blind Tehran, Iran

160 patients with H. pylori infection

All group:

- mean age ± SD: 47.1 ± 11.4

- 41.3% were males

2 weeks-STT (amoxicillin 1000 mg, clarithromycin 500 mg, omeprazole, 30 mg) + 2 weeks-probiotics (S. boulardii 250 mg), or as a placebo 8 weeks after the end of the eradication therapy Evaluation of the H. pylori status was repeated via UBT

I: 87.5%

P: 81.2%

p-value: 0.350 (NS)

d. H. pylori infections with single probiotic regimen (Clostridium)
Chen et al., 2018 [8] NR Single- blind Zhejiang, China

Of the 70 patients enrolled, H. pylori positive gastritis was diagnosed by esophago-gastro-duodenoscopy

Group A (as Placebo):

- mean age ± SD: 46.7 ± 12.8

- 54.3% were males

Group B (as Intervention):

- mean age ± SD: 45.3 ± 11.5

- 50.9% were males

Group A (as Placebo):

2 weeks-SQT (pantoprazole 40 mg, amoxicillin 1000 mg, furazolidone 100 mg, colloidal bismuth pectin 0.4 g) twice a day

Group B (as Intervention):

2 weeks-SQT same with group A + probiotics (Clostridium butyricum, 40 mg, 3 times/day)

8 weeks after the end of the eradication therapy Evaluation of the H. pylori status was repeated via 13C UBT

I: 96.9%

P: 96.8%

p-value: 1.000 (NS)

e. H. pylori infections with multiple probiotic regimens
Dore et al., 2019 [14] NR Single- blind Sassari, Italy

99 patients diagnosed with dyspeptic symptoms and found positive for H pylori infection were studied

Group I (as Intervention):

- mean age ± SD: 54.1 ± 14

- 32.6% were males

Group II (as Placebo):

- mean age ± SD: 52.2 ± 14

- 54.3% were males

Group I (with Probiotic):

10 days-SQT (pantoprazole 20 mg, tetracycline 500 mg, metronidazole 500 mg, PPI) twice a day + 4 weeks-probiotic supplement with Gastrus® 1 capsule (2 × 108 CFU of L. reuteri DSM 17 938 and 2 × 108 CFU of L. reuteri ATCC PTA 6475) once daily

Group II (Placebo):

10 days-pantoprazole 20 mg and the same doses of antibiotics administered as tetracycline 250 mg and metronidazole 250 mg plus Pylera® 2 capsules twice a day

4 weeks after the end of the eradication therapy Rates of eradication at 4 weeks after the end of therapy

I: 84.8%

P: 95.7%

p-value: 0.255 (NS)

Grgov et al., 2016 [21] NR Single- blind Leskovac, Serbia

167 patients with endoscopic and histological findings of chronic gastritis

Group I (as Placebo):

- mean age ± SD: 56.2 ± 14.8

- 35.1% were males

Group II (as Intervention):

- mean age ± SD: 56.3 ± 14.8

- 46.7% were males

-

Group I (Placebo):

5 weeks- in the first week were treated with STT (lansoprazole 2 × 30 mg, amoxicillin 2 × 1000 mg, clarithromycin 2 × 500) after the 7th day of the therapy, lansoprazole was continued in dose of 30 mg for 4 weeks

Group II (with probiotic):

were treated same STT as well as the patients in group 1 with an additional 1 capsule of probiotics containing S. boulardii, Lactobacillus acidophilus rosell-52, Lactobacillus rhamnosus rosell-11, and B. longum rosell-175, total 5 × 109 CFU; once a day during lunch

8 weeks after the end of the eradication therapy Evaluation of the H. pylori status was repeated via UBT

I: 93.3%

P: 81.8%

p-value: 0.05 (NS)

Haghdoost et al., 2017 [22] NR Single- blind Tabriz, Iran

176 patients with dyspeptic symptoms

Intervention group:

- mean age ± SD: 54.1 ± 14

- 32.6% were males

Placebo group:

- mean age ± SD: 52.2 ± 14

- 54.3% were males

10 days-STT (pantoprazole 40 mg, amoxicillin 100 mg, clarithromycin 500 mg) + 4 weeks after therapy-probiotics supplement of Prodigest® 500 mg contains Lactobacillus and Bifidobacterium with a total of 15 × 108 CFU/capsule, or as a placebo 4 weeks after the end of the eradication therapy Evaluation of the H. pylori status was repeated via Toyo H. pylori antigen test stool

I: 78.4%

P: 64.8%

p-value: 0.033 (S)

Hauser et al., 2015 [24] NR Double-blind Rijeka, Croatia

804 subjects with confirmed H. pylori infection

All group:

- mean age ± SD: 28.3 ± 5.8

- 53.9% were males

2 weeks-STT (omeprazole 2 × 20 mg, clarithromycin 2 × 500 mg, amoxicillin 2 × 1000 mg) + 2 weeks-probiotics supplement of Normia® contains L. rhamnosus GG (LGG®) and Bifidobacterium (BB-12®) with total 1 × 108 until 1 × 1010, twice a day, or as a placebo 6 weeks after the end of the eradication therapy Evaluation of the H. pylori status was repeated via UBT

I: 87.38%

P: 72.55%

p-value: 0.001 (S)

McNicholl et al., 2018 [41] NR Double-blind Madrid, Spain

209 patients with H. pylori infection

Intervention group:

- mean age ± SD: 47 ± 13

- 40% were males

Placebo group:

- mean age ± SD: 45 ± 13

- 35% were males

10 days-STT (PPI at standard doses (e.g., omeprazole 20 mg), clarithromycin 500 mg, and amoxicillin 1 g) twice daily + 10 days-1 capsule probiotic formula combining 2 bacterial strain 1 × 109 CFU for each strain of Lactobacillus plantarum, CETC7879 and Pediococcus acidilactici CETC7880), or as a placebo 6 weeks after the end of the eradication therapy Evaluation of the H. pylori status was repeated via 13C-UBT

I: 97%

P: 95.2%

p-value: 0.721 (NS)

Rodriguez et al., 2013 [44] NR Double-blind Sao Paulo, Brazil

107 patients with peptic ulcer or functional dyspepsia

Intervention group:

- mean age ± SD: NR

- 38.2% were males

Placebo group:

- mean age ± SD: NR

- 36.5% were males

7 days-STT (30 mg of lansoprazole, 500 mg tetracycline, 200 mg furazolidone (twice a day) + 4 weeks-probiotics formula combining 4 bacterial strain 1.25 × 109 CFUs for each strain of L. acidophillus, L. rhamnosus, Bifidobacterium bifidum, and Streptococcus faecium, twice a day, or as a placebo (containing acidified milk powder was also provided at the same amount and with the same instructions) 4 weeks after the end of the eradication therapy Evaluation of the H. pylori status was repeated via 13C-UBT

I: 89.8%

P: 85.1%

p-value: 0.490 (NS)

Shavaki et al., 2013 [51] NR Triple- blind Isfahan, Iran

170 patients with peptic ulcer disease and confirmed H. pylori infection

Intervention group:

- mean age ± SD: 42.3 ± 13.3

- 54.4% were males

Placebo group:

- mean age ± SD: 42.2 ± 13.2

- 66,6% were males

2 weeks-SQT (20 mg omeprazole, 240 mg bismuth subcitrate, 1000 amoxicillin, 500 clarithromycin) + 2 weeks-probiotics formula combining seven bacterial strains with total count 1 × 108 CFU/capsule (Lactobacillus: L. casei, L. rhamnosus, L. acidophilus, and L. bulgaricus; Bifidobacterium: B. breve, B. longum; Streptococcus thermophile), or as a placebo 4 weeks after the end of the eradication therapy Evaluation of the H. pylori status was repeated via 13C-UBT

I: 76.6%

P: 81.1%

p-value: 0.292 (NS)

Srinarong et al., 2014 [54] NR Single- blind Bangkok, Thailand

100 patients with H. pylori infection

All group:

- mean age: 50.5

- 28% were males

STT consisted of lansoprazole 30 mg (twice daily), amoxicillin 1 g (twice daily) and clarithromycin 1 g (once daily), bismuth subsalicylate 1.048 mg (twice daily)

Probiotic yogurt composed of Bifidobacterium lactis, L. acidophillus, and Lactobacillus paracasei (≥ 109 CFU/serve or as a placebo (conventional yogurt without probiotics)

Then, the patients were divided into four arms:

Group I: 7-day STT + probiotic

Group II: 14-day STT + probiotic

Group III: 7-day STT + placebo

Group IV: 14-day STT + placebo

2 weeks after the end of the eradication therapy Evaluation of the H. pylori status was repeated via rapid urea test

I7-day probiotic (Group 1): 100%

P7-day placebo (Group III): 81.1%

p-value: (NS)

I14-day probiotic (Group II): 100%

P14-day placebo (Group IV): 96%

p-value: (NS)

Tang et al., 2021 [56] NR Single- blind Chongqing, China

162 patients with H. pylori infection

Intervention group:

- mean age ± SD: 43.3 ± 11.3

- 71.4% were males

Placebo group:

- mean age ± SD: 45.3 ± 10.9

- 59.5% were males

2 weeks of SQT (esomeprazole 20 mg, amoxicillin 1000 mg, furazolidone 100 mg, bismuth potassium citrate 220 mg) twice daily + 4 weeks-probiotics supplement with Medilac-S contains Enterococcus faecium 4.5 × 108 and Bacillus subtilis 5.0 × 107, 3 times a day, or as a placebo (maltodextrin) 6 weeks after the end of the eradication therapy Evaluation of the H. pylori status was repeated via 13C-UBT

I: 89.33%

P: 84.72%

p-value: 0.226 (NS)

Tongtawe et al., 2015 [57] NR Single- blind Bangkok, Thailand

200 patients with H. pylori associated gastritis

Intervention group:

- mean age: 47.5

- 42.8% were males

Placebo group:

- mean age: 45.2

- 30.2% were males

1 week-STT (esomeprazole 20 mg, clarithromycin 500 mg, metronidazole 400 mg) + 1 week of pretreatment with probiotic containing L. delbrueckii, subsp. bulgaricus, and S. thermophilus), or as a placebo 4 weeks after the end of the eradication therapy Evaluation of the H. pylori status was repeated via rapid urea test

I: 90.8%

P: 84.3%

p-value: 0.040 (S)

Tongtawe et al., 2015 [58] NR Single- blind Bangkok, Thailand

300 patients diagnosed with H. pylori associated gastritis

Group I (Placebo):

- n: 98

- mean age: 46.2

- 49% were males

Group II (with Probiotic before STT):

- n: 97

- mean age: 55.9

- 49% were males

Group III (with Probiotic before and after STT):

- n: 100

mean age: 51%

Group 1 (Placebo):

1 week- STT (esomeprazole 20 mg, clarithromycin 500 mg, metronidazole 400 mg) + placebo

Group II (with Probiotic before STT):

1 week-pretreatment with probiotics containing Lactobacillus delbrueckii subsp. bulgaricus and Streptococcus thermophilus)

Group III (with Probiotic before and after STT):

1 week- pretreatment probiotic before tailored triple therapy then followed by 1 week of the same probiotic after treatment

4 weeks after the end of the eradication therapy Evaluation of the H. pylori status was repeated via rapid urea test

I: 74.5%

P: 77.3%

p-value: 0.010 (S)

f. Urinary Tract Infection
Cohen et al., 2020 [10] IIb Randomized Double-blind United States of America

228 participants with BV, diagnosed by Nugent Score 4–7

Intervention group:

- mean age ± SD: 30.7 ± 6.8

- 100% were females

Placebo group:

- mean age ± SD: 31.4 ± 7.1

- 100% were females

11 weeks-Metronidazole in combination with Lactin V at 2 × 109 CFU contains Lactobacillus crispatus CTV-05, twice weekly or as a placebo

The placebo formulation contained the same inactive ingredients as Lactin-V, without L. crispastus CTV-05

12 weeks after the probiotic treatment The parameter used is Gram’s staining of the vaginal smear was used to determine the Nugent score; normal (0 to 3), intermediate (4 to 6), or indicative of bacterial vaginosis (7 to 10)

I: 57%

P: 39%

p-value: 0.010 (S)

Laue et al., 2017 [33] II Randomiezed double blind Bad Segeber, Germany

48 participants with BV diagnosed by Nugent score

Intervention group:

- mean age ± SD: 32.6 ± 11.2

- 100% were females

Placebo group:

- mean age ± SD: 39.0 ± 12.3

- 100% were females

4 weeks-Metronidazole with Verum (yogurt contains L. crispatus, L. gasseri, L. rhamnosus, and L. jensenii with a total 1 × 107 CFU/mL), 2 yogurt drinks daily or as a placebo

The placebo treatment consisted of daily 2 × 125 g chemically (with H3PO4) acidified milk without bacterial strains

4 weeks after the probiotic treatment The parameter used is Nugent score 0–3

I: 81.3%

P: 64.7%

p-value: 0.438 (NS)

Sgibnev et al., 2019 [50] II Randomized Double-blind Orenburg, Russia

86 of the participants with BV were diagnosed by Amsel’s Criteria

Intervention group:

- mean age ± SD: 25.3 ± 2.4

- 100% were females

Placebo group:

- mean age ± SD: 23.6 ± 2.1

100% were females

2 weeks-Metronidazole (2 × 500 mg) + 1 capsule of probiotic Gynophilus® vaginally (Lactobacillus casei var. rhamnosus) twice in a day, or as a Placebo 15 days after the probiotic treatment The parameter used is Nugent score 0–3

I: 88.6%

P: 42.9%

p value’: < 0.001 (S)

Happel et al., 2020 [23] II Randomized single-blind Cape town, south africa

43 of the participants were confirmed to have BV by Nugent’s criteria

Intervention group:

- mean age: 22

- 100% were females

Placebo group:

- mean age: 23

- 100% were females

5 days-topical metronidazole once a day with a 15 days-treatment of probiotic (L. acidophilus, L. rhamnosus GG, B. bifidum, and B. longum ≥ 2 × 109 CFU) or as a placebo 20 weeks after the probiotic treatment The parameter used is Nugent score 0–3

I: 33.8%

P: 63.6%

p-value: 0.109 (NS)

Russo et al, 2019 [47] II Randomized Double-blind Romania

48 of the participants were confirmed to have BV by Nugent’s criteria

Intervention group:

- mean age ± SD: 35.4 ± 9.2

- 100% were females

Placebo group:

- mean age ± SD: 36.7 ± 7.7

- 100% were females

1 weeks-metronidazole oral twice daily with Verum (ingredients L. acidophilus LMG S29159 and L. rhamnosus ATCC SD5675) or placebo, 2 capsules/day for 5 days followed by 1 capsule/day for 10 days

The placebo was an identical capsule containing the inactive ingredient maltodextrin (100 mg)

24 weeks after the probiotic treatment The parameter used is Nugent score 0–3

I: 83.3%

P: 37.5%

p-value: < 0.010 (S)

Zhang et al., 2021 [64] II Randomized, single-center prospective parallel group Peking, China

99 participants were confirmed BV by Nugent’s criteria

Intervention group:

- mean age ± SD: 34.2 ± 7.0

- 100% were females

Placebo group:

- mean age ± SD: 33.3 ± 7.5

- 100% were females

7 days-metronidazole suppositories with probiotics (Lacticaseibacillus rhamnosus GR-1 and Limosilactobacillus reuteri RC-14) drink or placebo

The placebo was received metronidazole vaginal suppositories only

12 weeks after the probiotic treatment The parameter used is Nugent score 0–3

I: 57.69%

P: 59.57%

p-value: 0.040 (S)

g. Human Immunodeficiency Virus (HIV) infection
Hemsworth et al., 2015 [25] Randomized, three-period, crossover controlled trial Double-blinded Ontario- Canada

25 patients stable HAART therapy

All group:

- mean age ± SD: 47.9 ± 9.3

- 75% were males

Antiretroviral (ART) with 3 treatment sequences:

1. Type A contained micronutrients 175 g (vit. A, vit E, Niacinamide, vit. B1, vit. B12, vit. B6, vit. C, iron, selenium, zinc, DHA, EPA) and L. rhamnosus CAN-1 (min 109 CFU/mL)

2. Type B contained only micronutrients

3. Type C: contained only L. rhamnosus CAN-1 (109 CFU/ML)

The period of intake for each of the types was 30 days with a 14-day wash-out period between the intervention types

Assessment of CD4 cell count was obtained on days 0 and 30 The parameter used is CD4+ cell increasing

CD4+ cell count increased on average (Mean Δ) by

Type A:

19.2 ± 142 cells/uL

(p-value: 0.543, NS)

Baseline: 619 ± 316

Follow-up: 638 ± 384

Type B:

40.5 ± 221 cells/uL

(p-value: 0.411, NS)

Baseline: 569 ± 351

Follow-up: 637 ± 357

Type C:

-6.6 ± 154 cells/uL

(p-value: 0.845, NS)

Baseline: 654 ± 368

Follow-up: 639 ± 357

Yang et al., 2014 [62] NR Double-blind Los Angeles, California

17 patients (10 probiotic, 7 placebo) with chronic HIV-1 infection

Intervention group:

- mean age: 50.4

- 100% were males

Placebo group:

- Mean age: 48.4

- 86% were males

Antiretroviral (ART) + 12 weeks received a daily/capsule probiotics (GanedinBC®) 2 × 109 CFU of Bacillus coagulans GBI-30 or placebo Assessment of CD4+ cell count was obtained at days 0 and 90 The parameter used is CD4+ cell increasing

Intervention:

CD4+ cell count at

Baseline: 485 ± 152 Follow-up: 508 ± 150

Placebo:

CD4+ cell count at

Baseline: 432 ± 155 Follow-up: 486 ± 229