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Free Content Tuberculosis among immigrants from developing countries in the province of Milan, 1993–1996

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Abstract:

SETTING: The Province of Milan, which has high rates of immigration from developing countries, and the Villa Marelli Institute (VMI), Reference Centre for Tuberculosis Control of Lombardy.

OBJECTIVE: To describe epidemiology and clinical patterns of tuberculosis among immigrants from developing countries (IDCs) in the Province from 1993 to 1996.

DESIGN: Retrospective analysis of the registries of the Regional Bureau for Public Health and of the VMI concerning immigrant patients with active TB living in the Province. Restriction fragment length polymorphism (RFLP) analysis of the available strains to detect recent transmission among immigrants.

RESULTS: IDCs represented 22.8% of all TB cases. The standardised incidence rate was eight times higher in IDCs compared to Italians. Of 596 cases notified in IDCs, 524 (87.9%) had been referred at least once to the VMI. Of these, 77.2% were diagnosed within 5 years of arrival, and 86.6% were brought to medical attention because of symptoms. RFLP fingerprinting demonstrated that the mean period of stay in Italy was significantly higher in clustered than in non clustered patients (61.5 versus 37.3 months). Spread to the native population was episodic.

CONCLUSIONS: The incidence of TB is higher among more recent immigrants (i.e., Peruvians). TB cases are largely due to reactivation of infection occurring in the country of origin. Preventive measures for early diagnosis of disease or chemoprophylaxis of dormant infection are not regularly performed, but should be implemented for those immigrants at high risk.

Keywords: Italy; RFLP DNA fingerprinting; drug resistance; epidemiology; immigration; tuberculosis

Document Type: Regular Paper

Affiliations: 1: Villa Marelli Institute-Regional Reference Centre for Tuberculosis Control, University of Milan, Milan, Italy 2: Institute of Hygiene and Preventive Medicine, University of Milan, Milan, Italy 3: Institute of Infectious Disease, University of Milan, Milan, Italy 4: Lombardy Regional Bureau for Public Health and Infectious Diseases, Italy

Publication date: July 1, 1999

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  • The International Journal of Tuberculosis and Lung Disease publishes articles on all aspects of lung health, including public health-related issues such as training programmes, cost-benefit analysis, legislation, epidemiology, intervention studies and health systems research. The IJTLD is dedicated to the continuing education of physicians and health personnel and the dissemination of information on tuberculosis and lung health world-wide.

    Certain IJTLD articles are selected for translation into French, Spanish, Chinese or Russian. They are available on the Union website

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