SidaGhanaV1, Main, Exploration, bibRecord, 000169

Performance of Syphilis Sentinel Surveillance in the context of endemic Treponematoses: experience from Ghana

Identifieur interne : 000169 ( Main/Exploration ); précédent : 000168; suivant : 000170

Performance of Syphilis Sentinel Surveillance in the context of endemic Treponematoses: experience from Ghana

Auteurs : Edward Tieru Dassah [Ghana] ; Yaw Adu-Sarkodie [Ghana] ; Philippe Mayaud [Royaume-Uni]

Source :

BMC Infectious Diseases [ 1471-2334 ] ; 2016.

RBID : PMC:5148856

Descripteurs français

KwdFr :
- Adolescent, Adulte, Adulte d'âge moyen, Algorithmes, Enquêtes et questionnaires, Femelle, Ghana (épidémiologie), Humains, Jeune adulte, Mâle, Pian (épidémiologie), Reproductibilité des résultats, Surveillance sentinelle, Syphilis (diagnostic), Syphilis (épidémiologie), Sérodiagnostic de la syphilis (), Treponema pallidum (pathogénicité), Tréponématoses (traitement médicamenteux), Études séroépidémiologiques.
MESH :
- diagnostic : Syphilis.
- pathogénicité : Treponema pallidum.
- traitement médicamenteux : Tréponématoses.
- épidémiologie : Ghana, Pian, Syphilis.
- Adolescent, Adulte, Adulte d'âge moyen, Algorithmes, Enquêtes et questionnaires, Femelle, Humains, Jeune adulte, Mâle, Reproductibilité des résultats, Surveillance sentinelle, Sérodiagnostic de la syphilis, Études séroépidémiologiques.

English descriptors

KwdEn :
- Adolescent, Adult, Algorithms, Female, Ghana (epidemiology), Humans, Male, Middle Aged, Reproducibility of Results, Sentinel Surveillance, Seroepidemiologic Studies, Surveys and Questionnaires, Syphilis (diagnosis), Syphilis (epidemiology), Syphilis Serodiagnosis (methods), Treponema pallidum (pathogenicity), Treponemal Infections (drug therapy), Yaws (epidemiology), Young Adult.
MESH :
- diagnosis : Syphilis.
- drug therapy : Treponemal Infections.
- epidemiology : Ghana, Syphilis, Yaws.
- methods : Syphilis Serodiagnosis.
- pathogenicity : Treponema pallidum.
- Adolescent, Adult, Algorithms, Female, Humans, Male, Middle Aged, Reproducibility of Results, Sentinel Surveillance, Seroepidemiologic Studies, Surveys and Questionnaires, Young Adult.

Abstract

Background

Use of treponemal tests to screen for syphilis (caused by Treponema pallidum pallidum) poses challenges with infection status classification, especially in settings where other treponemal infections are endemic. This study aimed to determine the validity of the syphilis surveillance testing strategy implemented since 2004 using two treponemal tests, and estimate the seroprevalence of active syphilis infection in Ghana where yaws (caused by Treponema pallidum pertenue) is endemic.

Methods

We retested sera from the 2007 HIV sentinel survey (HSS) using a traditional algorithm, quantitative rapid plasma reagin test followed by qualitative Treponema pallidum haemagglutination assay. The adjusted seroprevalence of active syphilis was calculated by applying the proportions of active syphilis within identified categories of HSS samples during the retesting, to the entire population of HSS samples. The 95% confidence intervals (CIs) were calculated for each proportion, and the t-test was used to assess differences in proportions.

Results

Of 2,214 samples that were retested, 203 (9.2%) had active syphilis infection, 21 (0.9%) were biological false reactions, 640 (28.9%) were past or treated syphilis infections, and 1,350 (61%) were uninfected. The current syphilis testing strategy overestimated the seroprevalence of active syphilis infection by a third (HSS versus traditional algorithm: 6.0% (95% CI: 5.6–6.3) vs. 4.5% (95% CI: 4.2–4.8); p < 0.001), and had low positive predictive value (16.8%) for detecting active syphilis infection. More than half (51.9%) of HSS syphilis positive cases were actually past/treated treponemal infections, possibly previous exposure to yaws.

Conclusion

There is an urgent need to review the current syphilis sentinel surveillance testing strategy in Ghana in the context of concurrent endemic treponematoses, to better inform policy.

Url:

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5148856

DOI: 10.1186/s12879-016-2085-y
PubMed: 27938337
PubMed Central: 5148856

Affiliations:

Le document en format XML

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<term>Enquêtes et questionnaires</term>
<term>Femelle</term>
<term>Ghana (épidémiologie)</term>
<term>Humains</term>
<term>Jeune adulte</term>
<term>Mâle</term>
<term>Pian (épidémiologie)</term>
<term>Reproductibilité des résultats</term>
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<term>Syphilis (diagnostic)</term>
<term>Syphilis (épidémiologie)</term>
<term>Sérodiagnostic de la syphilis ()</term>
<term>Treponema pallidum (pathogénicité)</term>
<term>Tréponématoses (traitement médicamenteux)</term>
<term>Études séroépidémiologiques</term>
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<term>Yaws</term>
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<term>Humans</term>
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<term>Surveys and Questionnaires</term>
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<term>Adulte</term>
<term>Adulte d'âge moyen</term>
<term>Algorithmes</term>
<term>Enquêtes et questionnaires</term>
<term>Femelle</term>
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<term>Mâle</term>
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<front><div type="abstract" xml:lang="en"><sec><title>Background</title>
<p>Use of treponemal tests to screen for syphilis (caused by <italic>Treponema pallidum pallidum</italic>
) poses challenges with infection status classification, especially in settings where other treponemal infections are endemic. This study aimed to determine the validity of the syphilis surveillance testing strategy implemented since 2004 using two treponemal tests, and estimate the seroprevalence of active syphilis infection in Ghana where yaws (caused by <italic>Treponema pallidum pertenue)</italic>
 is endemic.</p>
</sec>
<sec><title>Methods</title>
<p>We retested sera from the 2007 HIV sentinel survey (HSS) using a traditional algorithm, quantitative rapid plasma reagin test followed by qualitative <italic>Treponema pallidum</italic>
 haemagglutination assay. The adjusted seroprevalence of active syphilis was calculated by applying the proportions of active syphilis within identified categories of HSS samples during the retesting, to the entire population of HSS samples. The 95% confidence intervals (CIs) were calculated for each proportion, and the <italic>t</italic>
-test was used to assess differences in proportions.</p>
</sec>
<sec><title>Results</title>
<p>Of 2,214 samples that were retested, 203 (9.2%) had active syphilis infection, 21 (0.9%) were biological false reactions, 640 (28.9%) were past or treated syphilis infections, and 1,350 (61%) were uninfected. The current syphilis testing strategy overestimated the seroprevalence of active syphilis infection by a third (HSS versus traditional algorithm: 6.0% (95% CI: 5.6–6.3) vs. 4.5% (95% CI: 4.2–4.8); <italic>p <</italic>
 0.001), and had low positive predictive value (16.8%) for detecting active syphilis infection. More than half (51.9%) of HSS syphilis positive cases were actually past/treated treponemal infections, possibly previous exposure to yaws.</p>
</sec>
<sec><title>Conclusion</title>
<p>There is an urgent need to review the current syphilis sentinel surveillance testing strategy in Ghana in the context of concurrent endemic treponematoses, to better inform policy.</p>
</sec>
</div>
</front>
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Performance of Syphilis Sentinel Surveillance in the context of endemic Treponematoses: experience from Ghana

Performance of Syphilis Sentinel Surveillance in the context of endemic Treponematoses: experience from Ghana

Source :

Descripteurs français

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	Le SIDA au Ghana (serveur d'exploration)
	Attention, ce site est en cours de développement ! Attention, site généré par des moyens informatiques à partir de corpus bruts. Les informations ne sont donc pas validées.