D-PLEX 310: Safety and Efficacy of D-PLEX in the Prevention of Post Abdominal Surgery Incisional Infection

Inclusion Criteria: 1. Subjects undergoing elective abdominal colon surgery involving resection and ileocolonic, ileorectal, colocolonic or colorectal anastomosis or with a stoma, who are preoperative stable hemodynamically. In a laparoscopic surgery, an abdominal wall incision ≥ 5 cm should be involved. 2. Male or non-pregnant female. 3. Females of childbearing potential should have a negative serum pregnancy test prior to index procedure. All females of childbearing potential must agree to use a highly effective method of contraception (e.g., double barrier, oral or parenteral hormonal, intrauterine device, or spermicide) consistently and correctly for the duration of the study. 4. Age ≥ 18 years old at screening. 5. Subjects who signed a written informed consent. 6. Willing and able to participate and meet all study requirements. 7. Survival expectancy of at least 60 days post randomization. Exclusion Criteria: 1. Subjects scheduled for abdominal surgery which is classified as emergency. 2. Subjects with any preoperative active infection that is currently being treated with antibiotics. 3. Subjects receiving any antibiotic therapy in the past 4 weeks prior to enrollment other than prophylaxis or antibiotic for the treatment of the disease for which the surgery is indicated. 4. Subjects undergoing concomitant additional procedures other than colon resection surgery (e.g., hyper-thermic intraperitoneal chemotherapy, liver resection, etc.). Female sterilization surgery (e.g., salpingo-oophorectomy, hysterectomy, etc.), involvement of a small bowel procedure, or cholecystectomy may be allowed, pending an advanced consultation and approval from the sponsor. 5. Subject received chemotherapy within the past 4 weeks of surgery, or radiation for colorectal cancer to the abdominal area, prior to the planned abdominal surgery (neo-adjuvant treatment). 6. Subjects that received oral or IV doxycycline during the past 4 weeks prior to screening. 7. Subjects with known hypersensitivity to doxycycline and/or to the tetracycline family of drugs or to the D-PLEX excipients. 8. Subjects with known allergies to more than 3 substances (as determined from allergy questionnaire at screening). 9. Subjects with history of allergic/hypersensitivity reaction to any substance having required hospitalization and/or treatment with intravenous steroids/intramuscular epinephrine or in the opinion of the investigator the subject is at high risk of developing severe allergic/hypersensitivity reactions. 10. Subjects with uncontrolled asthma (GINA III-IV). 11. Subjects with End Stage Renal Disease (ESRD/CKD stage 5). 12. Subjects with chronic urticaria. 13. Subjects diagnosed with TIA/CVA/ACS within the past 1 year prior to randomization. 14. Subjects that have undergone any prior abdominal surgery and current planned surgery involves re-opening the scar of the prior abdominal surgery. 15. Any subject with an active malignancy or malignancy that has not been in complete remission for at least 5 years. Excluding: * Subjects with potentially resectable non-metastatic colorectal cancer for which the surgery is indicated. * Subjects who have had carcinoma in situ of the cervix, squamous cell carcinoma of the skin, and basal cell carcinoma of the skin. * Subjects with non-violent cancer that does not require treatment 4 weeks prior to, and throughout the entire study duration. 16. Subjects with other concurrent severe and/or uncontrolled medical condition that could compromise participation in the study (e.g., non-GI active infection, uncontrolled diabetes, uncontrolled hypertension, congestive heart failure, unstable angina, ventricular arrhythmias, active ischemic heart disease, uncompensated cirrhosis, active upper GI tract ulceration). 17. Psychiatric, addictive, or any other disorder that compromises ability to provide informed consent for participation in this study. 18. Chronic alcohol or drug abuse. 19. Pregnant or breast-feeding women or women of childbearing age who refuse or are prohibited from using an effective contraceptive method of birth control (e.g., double barrier, oral or parenteral hormonal, intrauterine device, or spermicide) throughout study participation including the safety follow-up period. 20. Subjects that received any investigational drug within 30 days or 5½ half-lives of enrollment in the study (whichever is longer). 21. Subjects participating in any other interventional studies. 22. Any subject who, in the opinion of the investigator, is not eligible to participate in the study and/or comply with protocol requirements (e.g., due to a cognitive or medical condition).