Immigrants do not transmit tuberculosis more than indigenous patients in Catalonia (Spain) - 09/06/13

Doi : 10.1016/j.tube.2013.04.004

Pere Godoy ^a,^b,^c,^⁎ , Joan A. Caylà ^c,^d, Gloria Carmona ^a, Neus Camps ^a, Josep Álvarez ^a, Anna Rodés ^a, Neus Altet ^a, Jose-Maria Pina ^a, Irene Barrabeig ^a, Àngels Orcau ^d, Ignasi Parron ^a, Miquel Alsedà ^a,^b, Jaume March ^a,^b, Núria Follia ^a, Sofia Minguell ^a, Àngela Domínguez ^c,^e
the Working Group on the Study of Contacts of Tuberculosis Patients of Catalonia (FIS 04/2109)^{^f}
The members of the Working Group on the Study of Contacts of Tuberculosis Patients of Catalonia (FIS 04/2109) are listed in the Appendix section.
^a Department of Health, Generalitat of Catalonia, Spain
^b Faculty of Medicine, University of Lleida, Spain
^c Ciber de Epidemiología y Salud Pública CIBERESP, Spain
^d Public Health Agency of Barcelona, Spain
^e Department of Public Health, University of Barcelona, Spain

^∗Corresponding author. C/ Alcalde Rovira Roure, 2, 25006 Lleida, Spain. Tel.: +34 973 701634; fax: +34 973 246562.

Summary

Background

Immigrants may not transmit tuberculosis (TB) more than indigenous patients. The objective was to study the prevalence of TB infection among contacts of immigrant and indigenous TB patients and the risk factors associated with latent TB infection.

Methods

Contacts of TB cases recorded in 2005 and 2006 were surveyed using a standardized Health Department questionnaire. Infections were diagnosed using the tuberculin skin test (TST) (cut-off ≥ 5 mm). The risk of infection was determined by multivariate logistic regression and the adjusted odds ratios (aOR) with the 95% confidence intervals (CI) were calculated.

Results

The study of contacts was completed in 1329 cases of TB. The prevalence of infection was 32.3% (3038/9406) in all contacts, 41.4% in contacts of immigrant cases and 29.2% in contacts of indigenous cases. In the multivariate analysis, immigrant index cases were not associated with an increased risk (aOR = 0.9; 95%CI: 0.8–1.0). The prevalence of TST conversion was 10.0% (296/2969) in all contacts, 11.2% in immigrant contacts and 9.7% in indigenous contacts (p = 0.158).

Conclusions

Immigrants do not transmit TB more than indigenous TB patients. Infections which may have occurred in the countries of origin of immigrants were detected by the systematic study of contacts.

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Keywords : Contact tracing, Epidemiology, Immigration, Latent tuberculosis infection, Tuberculosis

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Vol 93 - N° 4

P. 456-460 - juillet 2013 Retour au numéro

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Immigrants do not transmit tuberculosis more than indigenous patients in Catalonia (Spain) - 09/06/13

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