Evaluation of Two Readings for the QuicGM Aspergillus Lateral Flow Assay in a Group of Immunocompromised Patients in Iraq

Hiba S. Kareem; Wifaq M. Al-Wattar

doi:10.32007/jfacmedbagdad.6622178

Authors

Hiba S. Kareem Department of Medical Microbiology, College of Medicine, University of Baghdad. Baghdad, Iraq. https://orcid.org/0009-0001-4620-4426
Wifaq M. Al-Wattar Unit of Communicable Diseases, College of Medicine, University of Baghdad. Baghdad, Iraq. https://orcid.org/0000-0003-4283-1673

DOI:

https://doi.org/10.32007/jfacmedbagdad.6622178

Keywords:

Aspergillus diagnostics, Galactomannan, Invasive Aspergillosis (IA), Lateral Flow Assay

Abstract

Background: Aspergillus spp. causes a wide range of diseases called Invasive Aspergillosis (IA) which is a fatal illness that affects a variety of immunocompromised people worldwide.

Objective: Using the lateral flow test for the detection of Galactomannan antigen in immunocompromised patients suspected to have IA.

Patients and Methods: This study was conducted on 72 patients, whose samples (serum, Bronchoalveolar lavage, Blood) were collected from the Hematology-Oncology Unit at Baghdad Teaching Hospital and Pediatric Welfare Hospital, and ICU in Ghazi AL-Hariri Surgical Specialties Hospital, and Bone Marrow Transplantation Center in period between November 2022 to February 2023. Patients’ blood and sputum were sent for fungal culture to confirm the diagnosis in most cases.

Results: QuicGM Aspergillus Lateral Flow Assay was conducted on 72 patients, of whom 34 () were positive and 38 (52.7) were negative (P-value of 0.001 and 0.5) respectively. This screening aimed at detecting IA. One week later, the second confirmative result was obtained from 24 patients to determine the response to antifungal drugs or recovery from neutropenia on which 15 readings were negative and nine were positive. Out of 48 single readings, 25 were positive and 23 were negative. All for 72 members of the control group gave negative results. This study is the first in Iraq to use this assay.

Conclusion: QuicGM Aspergillus Lateral Flow Assay was found to be reliable, sensitive, and specific, and proved to be a very good guide for the early diagnosis of IA in immunocompromised patients and in monitoring treatment outcomes and follow-up.

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Author Biographies

Hiba S. Kareem, Department of Medical Microbiology, College of Medicine, University of Baghdad. Baghdad, Iraq.

Department of Medical Microbiology, College of Medicine, University of Baghdad. Baghdad, Iraq.
Wifaq M. Al-Wattar, Unit of Communicable Diseases, College of Medicine, University of Baghdad. Baghdad, Iraq.

Unit of Communicable Diseases, College of Medicine, University of Baghdad. Baghdad, Iraq.

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