Immigration and tuberculosis evolution in Catalonia central region. 10 years (19962005)
Abstract number: P1554
Pina J., Ferrer A., Sala R.M.
Introduction: Immigrants from countries with a high tuberculosis (TB) prevalence may affect tuberculosis control in low incidence countries because there is a gradient of risk of disease among populations. The foreign-born, have emerged as the largest single component of the burden of tuberculosis in most industrialised countries.
Methods: Two periods cohort study: from 1996 to 2000 and from 2001 to 2005.TB notified cases from Catalonia Central Region-CCR-(6577 km2 and 1528144 inhabitants) has been included.
Proportion of immigrants foreign-born arrived to CCR were obtained. Indicators of TB control performance as proportion of tuberculosis cases with unsuccesful treatment outcome (UTO) and proportion of contact tracing (CT) within sputum smear positive patients(AFB+) were estimated as follows:
UTO: defaults, plus treatment failures, plus transfers/total patients with pulmonary tuberculosis. Goal <10% (IUATLD/WHO)
CT in AFB+ goal: over 85%.
Overall and spanish population TB incidence per 100.000 inhabitants and its average annual decline (AAD) were calculated.
Results: Immigrants proportion increased from 1.2% in 1996 to 1.5% in 2000 and from 2.9% in 2001 to 8.5% in 2005. 95% foreign-borns came from countries with 5099 TB cases /100,000 hab.
1530 new TB cases were notified (6% of whom were immigrants).
UTO: 8.8% in spanish vs 23.2% in immigrants (p < 0001).
CT: 88.5% in spanish vs 40.5% in immigrants (p < 0001).
Overall TB incidence: 28.3 in 1996 and 18.9 in 2000, AAD 9.6%.
Spanish population incidence rates decreased from 27.5 in 1996 to 16.7 in 2000; 11.2% AAD.
1352 new TB cases were notified (immigrants, 21.8%).
UTO: 7.6% spanish vs 28.9% immigrants (p < 0001).
CT: 91% spanish vs 62.2% immigrants (p < 0001).
Overall TB incidence decreased from 20.8 in 2001 to 18.4 in 2005, 3% AAD.
Spanish population incidence rates decreased from 18.8 in 2001 to 14.8 in 2005; 5.8% AAD.
Conclusions: Immigrant population shows poorly tuberculosis control performance results (UTO > 10% and low proportion of contact tracing).
Notification data indicate that the decline has slowed down after first period despite spanish population tuberculosis control measures has been effective (UTO < 10%). As TB incidence decrise in spanish, increase the proportion of immigrants among tuberculosis cases.
|Session name:||18th European Congress of Clinical Microbiology and Infectious Diseases|
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