Abdou AG, Harba NM, Afifi AF, Elnaidany NF Assessment of Cryptosporidium parvum infection in immunocompetent and immunocompromised mice and its role in triggering intestinal dysplasia. Int J Infect Dis. 2013 Aug;17(8):e593-600. doi: 10.1016/j.ijid.2012.11.023. Epub 2013 Jan 3.
Ali SH, Ismail MAM, El-Badry AA, Abu-Sarea EY, Dewidar AM, Hamdy DA An Association Between Blastocystis Subtypes and Colorectal Cancer Patients: A Significant Different Profile from Non-cancer Individuals. Acta Parasitol. 2022 Jun;67(2):752-763. doi: 10.1007/s11686-021-00508-y. Epub 2022 Jan 24.
Chan KH, Chandramathi S, Suresh K, Chua KH, Kuppusamy UR Effects of symptomatic and asymptomatic isolates of Blastocystis hominis on colorectal cancer cell line, HCT116. Parasitol Res. 2012 Jun;110(6):2475-80. doi: 10.1007/s00436-011-2788-3. Epub 2012 Jan 26.
Kumarasamy V, Atroosh WM, Anbazhagan D, Abdalla MMI, Azzani M Association of Blastocystis hominis with colorectal cancer: A systematic review of in vitro and in vivo evidences. World J Gastrointest Oncol. 2022 Mar 15;14(3):734-745. doi: 10.4251/wjgo.v14.i3.734.
Kumarasamy V, Kuppusamy UR, Samudi C, Kumar S Blastocystis sp. subtype 3 triggers higher proliferation of human colorectal cancer cells, HCT116. Parasitol Res. 2013 Oct;112(10):3551-5. doi: 10.1007/s00436-013-3538-5. Epub 2013 Aug 10.
Interventional studies are often prospective and are specifically tailored to evaluate direct impacts of treatment or preventive measures on disease.
Observational studies are often retrospective and are used to assess potential causation in exposure-outcome relationships and therefore influence preventive methods.
Expanded access is a means by which manufacturers make investigational new drugs available, under certain circumstances, to treat a patient(s) with a serious disease or condition who cannot participate in a controlled clinical trial.
Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.
Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.
