Evaluation of Mycobacterium tuberculosis--specific antibody responses in populations with different levels of exposure from Tanzania, Ethiopia, Brazil, and Denmark

Soren T Hoff; Markos Abebe; Pernille Ravn; Nyagosya Range; Wabyahe Malenganisho; Denise S Rodriques; Esper G Kallas; Christian Søborg; T Mark Doherty; Peter Andersen; Karin Weldingh

doi:http://dx.doi.org/10.1086/520662

Evaluation of Mycobacterium tuberculosis--specific antibody responses in populations with different levels of exposure from Tanzania, Ethiopia, Brazil, and Denmark

Soren T Hoff, Markos Abebe, Pernille Ravn, Nyagosya Range, Wabyahe Malenganisho, Denise S Rodriques, Esper G Kallas, Christian Søborg, T Mark Doherty, Peter Andersen, Karin Weldingh

49 Citations (Scopus)

Abstract

BACKGROUND: New, simple, and better-performing diagnostic tools are needed for the diagnosis of tuberculosis (TB). Much effort has been invested in developing an antibody-based test for TB, but to date, no such test has performed with sufficient sensitivity and specificity. A key question remaining is the extent to which the disappointing performance of current tests is associated with a high background prevalence of latent TB. METHODS: We compared Mycobacterium tuberculosis-specific ESAT-6 and CFP-10 antibody responses in a total of 565 human serum samples from M. tuberculosis-uninfected donors and donors with latent infection, as well as samples from patients with active TB. Our study included samples from 4 countries, representing environments with low, intermediate, and high TB incidences. RESULTS: We demonstrated significant increases in antibody levels in latently infected contacts, compared with M. tuberculosis-uninfected individuals, and in patients with active TB disease, compared with latently infected contacts. Furthermore, we found a striking increase in the magnitude of the antibody responses in samples obtained from infected Ethiopian individuals (with and without disease), compared with Danish and Brazilian infected individuals; this was presumably the result of higher exposure levels. CONCLUSIONS: Our study confirms the presence of ESAT-6 and CFP-10 antibodies in patients with TB, and we demonstrate that significant antibody responses are not restricted to active TB disease but can reflect latent infection, particularly in areas with high levels of exposure to M. tuberculosis. This finding is important for the understanding of the poor discriminatory power of current serodiagnostic tests in regions of endemicity, and it may have major implications on the future development of serologic tests.

Original language	English
Journal	Clinical Infectious Diseases
Volume	45
Issue number	5
Pages (from-to)	575-82
Number of pages	7
ISSN	1058-4838
DOIs	https://doi.org/10.1086/520662
Publication status	Published - 2007

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Hoff, S. T., Abebe, M., Ravn, P., Range, N., Malenganisho, W., Rodriques, D. S., Kallas, E. G., Søborg, C., Mark Doherty, T., Andersen, P., & Weldingh, K. (2007). Evaluation of Mycobacterium tuberculosis--specific antibody responses in populations with different levels of exposure from Tanzania, Ethiopia, Brazil, and Denmark. Clinical Infectious Diseases, 45(5), 575-82. https://doi.org/10.1086/520662

Evaluation of Mycobacterium tuberculosis--specific antibody responses in populations with different levels of exposure from Tanzania, Ethiopia, Brazil, and Denmark. / Hoff, Soren T; Abebe, Markos; Ravn, Pernille et al.

In: Clinical Infectious Diseases, Vol. 45, No. 5, 2007, p. 575-82.

Research output: Contribution to journal › Journal article › Research › peer-review

Hoff, ST, Abebe, M, Ravn, P, Range, N, Malenganisho, W, Rodriques, DS, Kallas, EG, Søborg, C, Mark Doherty, T, Andersen, P & Weldingh, K 2007, 'Evaluation of Mycobacterium tuberculosis--specific antibody responses in populations with different levels of exposure from Tanzania, Ethiopia, Brazil, and Denmark', Clinical Infectious Diseases, vol. 45, no. 5, pp. 575-82. https://doi.org/10.1086/520662

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abstract = "BACKGROUND: New, simple, and better-performing diagnostic tools are needed for the diagnosis of tuberculosis (TB). Much effort has been invested in developing an antibody-based test for TB, but to date, no such test has performed with sufficient sensitivity and specificity. A key question remaining is the extent to which the disappointing performance of current tests is associated with a high background prevalence of latent TB. METHODS: We compared Mycobacterium tuberculosis-specific ESAT-6 and CFP-10 antibody responses in a total of 565 human serum samples from M. tuberculosis-uninfected donors and donors with latent infection, as well as samples from patients with active TB. Our study included samples from 4 countries, representing environments with low, intermediate, and high TB incidences. RESULTS: We demonstrated significant increases in antibody levels in latently infected contacts, compared with M. tuberculosis-uninfected individuals, and in patients with active TB disease, compared with latently infected contacts. Furthermore, we found a striking increase in the magnitude of the antibody responses in samples obtained from infected Ethiopian individuals (with and without disease), compared with Danish and Brazilian infected individuals; this was presumably the result of higher exposure levels. CONCLUSIONS: Our study confirms the presence of ESAT-6 and CFP-10 antibodies in patients with TB, and we demonstrate that significant antibody responses are not restricted to active TB disease but can reflect latent infection, particularly in areas with high levels of exposure to M. tuberculosis. This finding is important for the understanding of the poor discriminatory power of current serodiagnostic tests in regions of endemicity, and it may have major implications on the future development of serologic tests.",

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AU - Hoff, Soren T

AU - Abebe, Markos

AU - Ravn, Pernille

AU - Range, Nyagosya

AU - Malenganisho, Wabyahe

AU - Rodriques, Denise S

AU - Kallas, Esper G

AU - Søborg, Christian

AU - Mark Doherty, T

AU - Andersen, Peter

AU - Weldingh, Karin

PY - 2007

Y1 - 2007

N2 - BACKGROUND: New, simple, and better-performing diagnostic tools are needed for the diagnosis of tuberculosis (TB). Much effort has been invested in developing an antibody-based test for TB, but to date, no such test has performed with sufficient sensitivity and specificity. A key question remaining is the extent to which the disappointing performance of current tests is associated with a high background prevalence of latent TB. METHODS: We compared Mycobacterium tuberculosis-specific ESAT-6 and CFP-10 antibody responses in a total of 565 human serum samples from M. tuberculosis-uninfected donors and donors with latent infection, as well as samples from patients with active TB. Our study included samples from 4 countries, representing environments with low, intermediate, and high TB incidences. RESULTS: We demonstrated significant increases in antibody levels in latently infected contacts, compared with M. tuberculosis-uninfected individuals, and in patients with active TB disease, compared with latently infected contacts. Furthermore, we found a striking increase in the magnitude of the antibody responses in samples obtained from infected Ethiopian individuals (with and without disease), compared with Danish and Brazilian infected individuals; this was presumably the result of higher exposure levels. CONCLUSIONS: Our study confirms the presence of ESAT-6 and CFP-10 antibodies in patients with TB, and we demonstrate that significant antibody responses are not restricted to active TB disease but can reflect latent infection, particularly in areas with high levels of exposure to M. tuberculosis. This finding is important for the understanding of the poor discriminatory power of current serodiagnostic tests in regions of endemicity, and it may have major implications on the future development of serologic tests.

AB - BACKGROUND: New, simple, and better-performing diagnostic tools are needed for the diagnosis of tuberculosis (TB). Much effort has been invested in developing an antibody-based test for TB, but to date, no such test has performed with sufficient sensitivity and specificity. A key question remaining is the extent to which the disappointing performance of current tests is associated with a high background prevalence of latent TB. METHODS: We compared Mycobacterium tuberculosis-specific ESAT-6 and CFP-10 antibody responses in a total of 565 human serum samples from M. tuberculosis-uninfected donors and donors with latent infection, as well as samples from patients with active TB. Our study included samples from 4 countries, representing environments with low, intermediate, and high TB incidences. RESULTS: We demonstrated significant increases in antibody levels in latently infected contacts, compared with M. tuberculosis-uninfected individuals, and in patients with active TB disease, compared with latently infected contacts. Furthermore, we found a striking increase in the magnitude of the antibody responses in samples obtained from infected Ethiopian individuals (with and without disease), compared with Danish and Brazilian infected individuals; this was presumably the result of higher exposure levels. CONCLUSIONS: Our study confirms the presence of ESAT-6 and CFP-10 antibodies in patients with TB, and we demonstrate that significant antibody responses are not restricted to active TB disease but can reflect latent infection, particularly in areas with high levels of exposure to M. tuberculosis. This finding is important for the understanding of the poor discriminatory power of current serodiagnostic tests in regions of endemicity, and it may have major implications on the future development of serologic tests.

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DO - http://dx.doi.org/10.1086/520662

M3 - Journal article

SN - 1058-4838

VL - 45

SP - 575

EP - 582

JO - Clinical Infectious Diseases

JF - Clinical Infectious Diseases

IS - 5

ER -

Evaluation of Mycobacterium tuberculosis--specific antibody responses in populations with different levels of exposure from Tanzania, Ethiopia, Brazil, and Denmark

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