Proceeds from website advertising help sustain Lab Tests Online. AACC is a not-for-profit organization and does not endorse non-AACC products and services.

Ova and Parasite Exam

Print this article
Share this page:
Also known as: O&P
Formal name: Parasitic Examination, stool
Related tests: Gastrointestinal Pathogens Panel, Stool Culture, Giardia, Cryptosporidium, and Entamoeba histolytica Antigen Tests

Board approvedAll content on Lab Tests Online has been reviewed and approved by our Editorial Review Board.

Article Sources

« Return to Related Pages

NOTE: This article is based on research that utilizes the sources cited here as well as the collective experience of the Lab Tests Online Editorial Review Board. This article is periodically reviewed by the Editorial Board and may be updated as a result of the review. Any new sources cited will be added to the list and distinguished from the original sources used. To access online sources, copy and paste the URL into your browser.

Sources Used in Current Review

Chamberland, R. (2014 March 5 Updated). Stool Ova and Parasite Test. Medscape Drugs & Diseases [On-line information]. Available online at http://emedicine.medscape.com/article/2117799-overview. Accessed on January 2016.

Lehrer, J. (2014 May 15, Updated). Stool ova and parasites exam. MedlinePlus Medical Encyclopedia [On-line information]. Available online at https://www.nlm.nih.gov/medlineplus/ency/article/003756.htm. Accessed on January 2016.

Barr, W. and Smith, A. (2014 February 1) Acute Diarrhea in Adults. Am Fam Physician. 2014 Feb 1;89(3):180-189. [On-line information]. Available online at http://www.aafp.org/afp/2014/0201/p180.html. Accessed on January 2016.

Pearson, R. (2013 November). Approach to Parasitic Infections. Merck Manual Professional Version [On-line information]. Available online at http://www.merckmanuals.com/professional/infectious-diseases/approach-to-parasitic-infections/approach-to-parasitic-infections. Accessed on January 2016.

(2014 March 10). Diagnosis of Parasitic Diseases. CDC [On-line information]. Available online at http://www.cdc.gov/parasites/references_resources/diagnosis.html. Accessed on January 2016.

Dowshen, S. (2014 September Reviewed). Stool Test: Ova and Parasites. KidsHealth from Nemours [On-line information]. Available online at http://kidshealth.org/parent/system/medical/test_oandp.html. Accessed on January 2016.

Sources Used in Previous Reviews

Thomas, Clayton L., Editor (1997). Taber's Cyclopedic Medical Dictionary. F.A. Davis Company, Philadelphia, PA [18th Edition].

Pagana, Kathleen D. & Pagana, Timothy J. (2001). Mosby's Diagnostic and Laboratory Test Reference 5th Edition: Mosby, Inc., Saint Louis, MO.

Hardy, D. (2002 January). Diarrhea Caused by Parasites. Clinical Laboratories Newsletter, Univ of Roch Med Center, Vol. 22, No. 1 [On-line newsletter]. Available online at http://www.urmc.rochester.edu/path/newsletter102.htm.

Diagnostic Procedures for Stool Specimens. DPDx, Laboratory Identification of Parasites of Public Health Concern [On-line information]. Available online through http://www.dpd.cdc.gov.

Kotton, C., Updated (2002 January 08, Updated). Stool Ova And Parasites Exam. MedlinePlus Health Information, Medical Encyclopedia [On-line information]. Available online at http://www.nlm.nih.gov/medlineplus/ency/article/003756.htm.

A.D.A.M. editorial, Updated (2001 September 14). Giardiasis. MedlinePlus Health Information, Medical Encyclopedia [On-line information]. Available online at http://www.nlm.nih.gov/medlineplus/ency/article/000288.htm.

Kott, C., Updated (2002 July 19, Updated). Cryptosporidium enteritis. MedlinePlus Health Information, Medical Encyclopedia [On-line information]. Available online at http://www.nlm.nih.gov/medlineplus/ency/article/000617.htm.

(2001 March). Amebiasis. CDC, Division of Parasitic Diseases, Parasitic Disease Information, Fact Sheet [On-line information]. Available online at http://www.cdc.gov/ncidod/dpd/parasites/amebiasis/factsht_amebiasis.htm.

(2001 May). Cryptosporidiosis. CDC, Division of Parasitic Diseases, Parasitic Disease Information, Fact Sheet [On-line information]. Available online at http://www.cdc.gov/ncidod/dpd/parasites/cryptosporidiosis/factsht_cryptosporidiosis.htm.

(2001 May). Giardiasis. CDC, Division of Parasitic Diseases, Parasitic Disease Information, Fact Sheet [On-line information]. Available online at http://www.cdc.gov/ncidod/dpd/parasites/giardiasis/factsht_giardia.htm.

(2003 February, Updated ). Giardiasis. AAFP, familydoctor.org Fact Sheet [On-line information]. Available online at http://familydoctor.org/handouts/078.html through http://familydoctor.org.

Giardia Antigen by EIA. ARUP's Guide to Clinical Laboratory Testing (CLT) [On-line information]. Available online at http://www.aruplab.com/guides/clt/tests/clt_a247.htm#1149440.

Cryptosporidium Stain and Antigen. ARUP's Guide to Clinical Laboratory Testing (CLT) [On-line information]. Available online at http://www.aruplab.com/guides/clt/tests/clt_a174.htm#1060170.

Giardia lamblia. Ohio State University, College of Biological Sciences, Parasites and Parasitological Resources [On-line information]. Available online at http://www.biosci.ohio-state.edu/~parasite/giardia.html.

Cryptosporidium parvum. Ohio State University, College of Biological Sciences, Parasites and Parasitological Resources [On-line information]. Available online at http://www.biosci.ohio-state.edu/~parasite/cryptosporidium.html.

Pagana, Kathleen D. & Pagana, Timothy J. (© 2007). Mosby's Diagnostic and Laboratory Test Reference 8th Edition: Mosby, Inc., Saint Louis, MO. Pp 887-888.

Wu, A. (2006). Tietz Clinical Guide to Laboratory Tests, Fourth Edition. Saunders Elsevier, St. Louis, Missouri. Pp 1590.

(2007 June 25, Reviewed). Risks from Food and Water (Drinking and Recreational). Travelers' Health: Yellow Book, CDC Health Information for International Travel 2008, Chapter 2, Pre- and Post-travel General Health Recommendations [On-line information]. Accessed on: 12/9/07. Available online at http://wwwn.cdc.gov/travel/yellowBookCh2-FoodWaterRisks.aspx.

(2007 February 27, Reviewed). About Parasites. CDC Parasitic Diseases [On-line information]. Available online at http://www.cdc.gov/ncidod/dpd/aboutparasites.htm. Accessed on 12/24/07.

Forbes BA, Sahm DF, Weissfeld AS. Bailey & Scott's Diagnostic Microbiology. 12th Edition: Mosby Elsevier, St. Louis, MO; 2007.

Vorvick, L. (Updated 2010 May 4). Stool ova and parasites exam. MedlinePlus Medical Encyclopedia [On-line information]. Available online at http://www.nlm.nih.gov/medlineplus/ency/article/003756.htm. Accessed February 2011.

(Modified 2010 June 2). Parasites and Foodborne Illness. USDA Food Safety and Inspection Service Fact Sheets [On-line information]. Available online at http://www.fsis.usda.gov/factsheets/Parasites_and_Foodborne_Illness/index.asp. Accessed February 2011.

Pennardt, A. (Updated April 28). Giardiasis in Emergency Medicine. eMedicine [On-line information]. Available online at http://emedicine.medscape.com/article/782818-overview. Accessed February 2011.

(Modified 2009 July 20). Detection of Parasite Antigens. DPDx Diagnostic Procedures Stool Specimens, [On-line information]. Available online at http://www.dpd.cdc.gov/dpdx/HTML/DiagnosticProcedures.htm. Accessed February 2011.

Fisher, M. et. al. (Updated 2010 November). Diarrhea, Parasitic Evaluation. ARUP Consult [On-line information]. Available online at http://www.arupconsult.com/Topics/ParasiticDiarrhea.html?client_ID=LTD. Accessed February 2011.

Mayo Clinic Staff (2010 May 29). Giardia infection (giardiasis). Mayo Clinic [On-line information]. Available online at http://www.mayoclinic.com/health/giardia-infection/DS00739. Accessed May 2011.

(© 2005-2010). Viruses, Bacteria and Parasites in the Digestive Tract. Children's Hospital Boston [On-line information]. Available online at http://www.childrenshospital.org/az/Site1959/mainpageS1959P0.html. Accessed May 2011.

Mukherjee S. (Updated November 18, 2009). Giardiasis. eMedicine [On-line information]. Available online at http://emedicine.medscape.com/article/176718-overview. Accessed May 2011

Kucik C, et al (March 1 2004). Common Intestinal Parasites. Am Fam Physician. 2004 Mar 1;69(5):1161-1169. Available online at http://www.aafp.org/afp/2004/0301/p1161.html. Accessed May 2011.

Pagana, K. D. & Pagana, T. J. (© 2011). Mosby's Diagnostic and Laboratory Test Reference 10th Edition: Mosby, Inc., Saint Louis, MO. Pp 911-912.

Forbes, B. et. al. (© 2007). Bailey & Scott's Diagnostic Microbiology, 12th Edition: Mosby Elsevier Press, St. Louis, MO. Pp 543-627.