Posts: 3,675,937
Threads: 734,344
Joined:
Sep 2021
Reputation:
5
95.
Which of the following is the best method for the detection of Strongyloides larvae?
A. Sigmoidoscopy and aspiration of mucosal lesions
B. Baermann technique
C. Dilution followed by egg count
D. Enzyme immunoassay (EIA)
E. Examination of a cellophane tape swab
Posts: 3,675,937
Threads: 734,344
Joined:
Sep 2021
Reputation:
5
Strongyloides larvae are secreted in feces and excretion may be intermittent, releasing as few as 50 eggs per day. Larvae are seen in stool approximately 1 month after skin penetration. A single stool sample may only be 30% sensitive in cases of low parasite burden. More than 90% sensitivity for stool samples is seen if 7 or greater samples are examined. Other stool examinations include the Baermann technique (larvae migrate from stool samples to warmed water and are detected in the centrifuged fluid), agar plate culture, direct fecal smear, or using Harada-Mori filter paper.
In hyperinfective and disseminated strongyloidiasis, larvae can be found in extraintestinal sites such as sputum, bronchoalveolar lavage, urine, semen, ascites, gastroesophageal biopsy, skin biopsy, and cerebrospinal fluid. Serologic testing for immunoglobulin G (IgG) antibodies against Strongyloides antigens with enzyme-linked immunosorbent assay is 82-95% sensitive for detecting infection. Eosinophilia is typically present in chronic infection but is usually absent in hyperinfection and disseminated disease. A normal eosinophil count with an untreated known Strongyloides infection may be a poor prognostic sign
D. Enzyme immunoassay (EIA) is the ans i guess
Posts: 3,675,937
Threads: 734,344
Joined:
Sep 2021
Reputation:
5
A : its hatched in intestinal mucosa (egg and adult parasite), and stool for rhabitiform larvae.
