The Impact of a Combination of Bifidobacterium Longum 35624® and 1714™ Strains in Adults With Irritable Bowel Syndrome

Inclusion Criteria: To be considered eligible for enrolment into the study, subjects must;

1. Be able to give written informed consent,

2. Be a Caucasian female, between 18 and 55 years of age,

3. Subject has Irritable Bowel Syndrome according to the Rome III Diagnostic Criteria: Recurrent abdominal pain or discomfort** at least 3 days/month in the last 3 monthsassociated with two or more of the following: i. Improvement with defecation ii. Onset associated with a change in frequency of stool iii. Onset associated with a change in form (appearance) of stool Criterion fulfilled for the last 3 months with symptom onset at least 6 months priorto diagnosis

** "Discomfort" means an uncomfortable sensation not described as pain.

4. Subjects agree to complete symptom diaries and return completed diaries at allsessions,

5. Subjects with mild to moderate score (8-14) on the HADS-A and/or HADS-D questionnaire,Subjects will be excluded if there is greater than 1 point difference from thescreening to baseline scores,

6. Be willing to refrain from taking any dietary supplements or other fermented foodsthat contain live bacteria during the study,

7. Be willing to refrain from taking any medications or preparations used in the therapyof IBS (herbal, dietary supplements, homeopathic preparations, etc.) during the studyand from 4-weeks before the baseline visit,

8. Be willing to refrain from probiotic use 4 weeks before the baseline visit,

9. If using fiber supplements (e.g., Trifyba, Fybogel, Konsyl, Isogel, Regulan, Ispagel,Celevac, Normacol), the dose and regimen have remained stable for at least 30 days andthe subject will continue the same dose and regimen throughout the length of thetrial,

10. If using products that contain nicotine or caffeine, agrees to continue current usagelevels throughout the length of the trial.

Exclusion Criteria: Subjects will be excluded from the study if they meet any of the below criteria;

1. Are less than 18 and greater than 55 years of age at the time of consent,

2. Females are pregnant, lactating or wish to become pregnant during the study. Femalesubject is currently either of:

• non-childbearing potential (i.e., physiologically incapable of becoming pregnant,including any female who is post-menopausal or any female who is surgicallysterilized (via documented hysterectomy or bilateral tubal ligation). (Forpurposes of this study, postmenopausal is defined as one year without menses), OR

• child bearing potential, the subject is eligible to enter and participate in thisstudy if she is not lactating and has a negative urine pregnancy test at thescreening visit, visit 2 and upon completion of the study at visit 7. The subjectmust also agree to one of the following methods of contraception: i. Complete abstinence from intercourse two weeks prior to administration ofstudy drug, throughout the clinical trial, until the completion of follow-upprocedures or for two weeks following discontinuation of the study medication incases where subject discontinues the study prematurely. (Subjects utilizing thismethod must agree to use an alternate method of contraception if they shouldbecome sexually active and will be queried on whether they have been abstinent inthe preceding 2 weeks when they present to the clinic for the Final Visit.) or, ii. has a male sexual partner who is surgically sterilized prior to the Screen Visitand is the only male sexual partner for that subject or, iii. sexual partner(s) is/are exclusively female or, iv. Oral contraceptives (either combined or progestogen only) with double-barriermethod of contraception consisting of spermicide with either condom or diaphragm. (Women of child-bearing potential using an oral contraceptive in combination with adouble-barrier method of contraception are required to continue to use this form ofcontraception for 1 week following discontinuation of study medication). v. Use of double-barrier contraception, specifically, a spermicide plus a mechanicalbarrier (e.g. male condom, female diaphragm). The subject must be using this methodfor at least 1 week following the end of the study or, vi. Use of any intrauterine device (IUD) or contraceptive implant with published datashowing that the highest expected failure rate is less than 1% per year. The subjectmust have the device inserted at least 2 weeks prior to the first Screen Visit,throughout the study, and 2 weeks following the end of the study,

3. Are hypersensitive to any of the components of the test product,

4. Consumption of Alflorex probiotic for 6 months,

5. Consumption of any type of yoghurts or probiotic-containing products in the 4 weeksprior to the baseline visit,

6. Subjects who have been on antibiotics during the past month,

7. Concurrent systemic disease and/or laboratory abnormalities considered byInvestigators to be risky or that could interfere with data collection,

8. Subjects who have a significant acute or chronic coexisting illness [cardiovascular,history of co-existing gastrointestinal, and/or gynecological, and/or urologicpathology (eg., colon cancer, colitis, Crohn's, celiac, endometriosis, prostatecancer) or lactose intolerance,

9. Subjects with inflammatory disorders (e.g. chronic fatigue syndrome (CDC criteria),psoriasis, rheumatoid arthritis or any other inflammatory arthropathies),

10. Subjects who are severely immunocompromised (HIV positive, transplant patient, onantirejection medications, on a steroid for >30 days, or chemotherapy or radiotherapywithin the last year),

11. Psychiatric diagnosis other than anxiety or depression,

12. Subjects who are on anti-depressants, anxiolytics, antipsychotics, anticonvulsants,centrally acting corticosteroids and/or opioid pain relievers in the last 6 months,

13. Subject has IBS symptoms that are predominantly related to menstruation,

14. Subject has a history of prior gastrointestinal surgery (apart from appendectomy),

15. Subjects who have had a previous cholecystectomy,

16. Subjects with a history of active cancer in the last 5 years (other than localizedbasal cell, squamous cell skin cancer or cancer in situ that has been resected),

17. Subjects with a history of drug and / or alcohol abuse at the time of enrolment,

18. Subject has a history of non-compliance,

19. Individuals who, in the opinion of the investigator, are considered to be poorattendees or unlikely for any reason to be able to comply with the trial,

20. If the subject has been in a recent experimental trial, these must have been completednot less than 30 days prior to this study,

21. Have a malignant disease or any concomitant end-stage organ disease.