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BioMed Research International
Volume 2014, Article ID 364137, 5 pages
http://dx.doi.org/10.1155/2014/364137
Research Article

Helminth Infection Increases the Probability of Indeterminate QuantiFERON Gold in Tube Results in Pregnant Women

1Mekelle University, Mekelle, Ethiopia
2Addis Ababa University, Addis Ababa, Ethiopia
3Armauer Hansen Research Institute (AHRI), Addis Ababa, Ethiopia

Received 30 November 2013; Accepted 10 January 2014; Published 19 February 2014

Academic Editor: Umesh Gupta

Copyright © 2014 Dawit Gebreegziabiher et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Background. Approximately one-third of the world population is infected with M. tuberculosis and helminths (Kariminia et al. (2009), Walson et al. (2010)). Pregnancy and Helminth infection are known to suppress the response (Kariminia et al. (2009), Elias et al. (2006)) on which the QuantiFERON Gold in Tube (QFT-GIT) assay, that measures the released IFN- upon in vitro stimulation with mycobacterial antigens, relies on (Thomas et al. (2010)). Objective. To determine whether QFT-GIT indeterminate result is significantly associated with helminth infection or not. Methods. In this cross-sectional study, eighty-five pregnant mothers were screened for parasitic and LTBI using Kato-Katz and QFT-GIT test-respectively, Result. The prevalence of helminth infection in pregnant mothers was 23 (27%) of this 17 (20%) was due to Schistosoma mansoni. Among the total of 85 study participants 26.8% were QFT-GIT positive and 14 (17%) had indeterminate results. Three samples (21.4%) were randomly selected from the indeterminate QFT-GIT results and retested to check the reproducibility of the assay and remained indeterminate. QFT-GIT indeterminate result showed significant association with helminth infection. Conclusion. Helminth infections were significantly associated with indeterminate QFT-GIT results in pregnant mothers. Therefore further study is important to evaluate the possible effect of helminth infection by excluding the effect of pregnancy, as pregnancy also downregulates cellular immunity.