BACK TOTOP Browse A-ZSearchBrowse A-ZABCDEFGHIJKLMNOPQRSTUVWXYZ0-9 E-mail FormEmail ResultsName:Email address:Recipients Name:Recipients address:Message: Print-FriendlyBookmarksbookmarks-menuString testDuodenal parasites test; Giardia - string testA string test involves swallowing a string to obtain a sample from the upper part of the small intestine. The sample is then tested to look for intestinal parasites. How the Test is Performed To have this test, you swallow a string with a weighted gelatin capsule on the end. The string is pulled out 4 hours later. Any bile, blood, or mucus attached to the string is examined under the microscope. This is done to look for cells and parasites or parasite eggs. BileBile is a fluid that is made and released by the liver and stored in the gallbladder. Bile helps with digestion. It breaks down fats into fatty acid...ImageRead Article Now Book Mark Article How to Prepare for the Test You may be asked not to eat or drink anything for 12 hours before the test. How the Test will Feel You may find it hard to swallow the string. You may have an urge to vomit when the string is being removed. Why the Test is Performed The test is performed when your health care provider suspects that you have a parasite infection. Usually a stool sample is tested first. A string test may be done if the stool sample is negative but a parasite infection is still suspected. Normal Results No blood, parasites, fungi, or abnormal cells is normal.Normal value ranges may vary slightly among different laboratories. Talk to your provider about the meaning of your test results. What Abnormal Results Mean Abnormal results may be a sign of parasite infection, such as giardia.GiardiaGiardia, or giardiasis, is a parasitic infection of the small intestine. A tiny parasite called Giardia lamblia causes it.ImageRead Article Now Book Mark Article Considerations Treatment with certain drugs can affect the test results.Open ReferencesReferencesAdam RD. Giardiasis. In: Ryan ET, Hill DR, Solomon T, Aronson NE, Endy TP, eds. Hunter's Tropical Medicine and Emerging Infectious Diseases. 10th ed. Philadelphia, PA: Elsevier; 2020:chap 95.Melia JMP, Sears CL. Infectious enteritis and proctocolitis. In: Feldman M, Friedman LS, Brandt LJ, eds. Sleisenger and Fordtran's Gastrointestinal and Liver Disease. 11th ed. Philadelphia, PA: Elsevier; 2021:chap 110.Siddiqi HA, Rabinowitz S, Axiotis CA.. Laboratory diagnosis of gastrointestinal and pancreatic disorders. In: McPherson RA, Pincus MR, eds. Henry's Clinical Diagnosis and Management by Laboratory Methods. 24th ed. Philadelphia, PA: Elsevier; 2022:chap 23.Wojewoda CM. Stempak LM. Medical bacteriology. In: McPherson RA, Pincus MR, eds. Henry's Clinical Diagnosis and Management by Laboratory Methods. 24th ed. Philadelphia, PA: Elsevier; 2022:chap 57.AllVideoImagesTogAscaris lumbricoides egg - illustration This is an egg of Ascaris lumbricoides. Ascarides are roundworms, a common parasitic infection throughout the world. It is estimated that as many as 1 billion people (one sixth of the world population) may be infected with roundworms.Ascaris lumbricoides eggillustrationGelatin capsule in stomach - illustration A string test is performed to detect the presence of intestinal parasites. A weighted gelatin capsule attached to a string is swallowed and left in place. After about 4 hours, the gelatin capsule is pulled out of the stomach by the string. Any bile, blood, or mucus remaining on the string is examined under the microscope for cell types and segments of parasites or eggs.Gelatin capsule in stomachillustrationAscaris lumbricoides egg - illustration This is an egg of Ascaris lumbricoides. Ascarides are roundworms, a common parasitic infection throughout the world. It is estimated that as many as 1 billion people (one sixth of the world population) may be infected with roundworms.Ascaris lumbricoides eggillustrationGelatin capsule in stomach - illustration A string test is performed to detect the presence of intestinal parasites. A weighted gelatin capsule attached to a string is swallowed and left in place. After about 4 hours, the gelatin capsule is pulled out of the stomach by the string. Any bile, blood, or mucus remaining on the string is examined under the microscope for cell types and segments of parasites or eggs.Gelatin capsule in stomachillustration Tests for String test String testRelated Information Giardia infection(Condition) Review Date: 5/6/2022 Reviewed By: Michael M. Phillips, MD, Emeritus Professor of Medicine, The George Washington University School of Medicine, Washington, DC. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team. The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. No warranty of any kind, either expressed or implied, is made as to the accuracy, reliability, timeliness, or correctness of any translations made by a third-party service of the information provided herein into any other language. © 1997- A.D.A.M., a business unit of Ebix, Inc. Any duplication or distribution of the information contained herein is strictly prohibited. © 1997- All rights reserved. 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String testDuodenal parasites test; Giardia - string testA string test involves swallowing a string to obtain a sample from the upper part of the small intestine. The sample is then tested to look for intestinal parasites. How the Test is Performed To have this test, you swallow a string with a weighted gelatin capsule on the end. The string is pulled out 4 hours later. Any bile, blood, or mucus attached to the string is examined under the microscope. This is done to look for cells and parasites or parasite eggs. BileBile is a fluid that is made and released by the liver and stored in the gallbladder. Bile helps with digestion. It breaks down fats into fatty acid...ImageRead Article Now Book Mark Article How to Prepare for the Test You may be asked not to eat or drink anything for 12 hours before the test. How the Test will Feel You may find it hard to swallow the string. You may have an urge to vomit when the string is being removed. Why the Test is Performed The test is performed when your health care provider suspects that you have a parasite infection. Usually a stool sample is tested first. A string test may be done if the stool sample is negative but a parasite infection is still suspected. Normal Results No blood, parasites, fungi, or abnormal cells is normal.Normal value ranges may vary slightly among different laboratories. Talk to your provider about the meaning of your test results. What Abnormal Results Mean Abnormal results may be a sign of parasite infection, such as giardia.GiardiaGiardia, or giardiasis, is a parasitic infection of the small intestine. A tiny parasite called Giardia lamblia causes it.ImageRead Article Now Book Mark Article Considerations Treatment with certain drugs can affect the test results.Open ReferencesReferencesAdam RD. Giardiasis. In: Ryan ET, Hill DR, Solomon T, Aronson NE, Endy TP, eds. Hunter's Tropical Medicine and Emerging Infectious Diseases. 10th ed. Philadelphia, PA: Elsevier; 2020:chap 95.Melia JMP, Sears CL. Infectious enteritis and proctocolitis. In: Feldman M, Friedman LS, Brandt LJ, eds. Sleisenger and Fordtran's Gastrointestinal and Liver Disease. 11th ed. Philadelphia, PA: Elsevier; 2021:chap 110.Siddiqi HA, Rabinowitz S, Axiotis CA.. Laboratory diagnosis of gastrointestinal and pancreatic disorders. In: McPherson RA, Pincus MR, eds. Henry's Clinical Diagnosis and Management by Laboratory Methods. 24th ed. Philadelphia, PA: Elsevier; 2022:chap 23.Wojewoda CM. Stempak LM. Medical bacteriology. In: McPherson RA, Pincus MR, eds. Henry's Clinical Diagnosis and Management by Laboratory Methods. 24th ed. Philadelphia, PA: Elsevier; 2022:chap 57.