ABSTRACT
The present study aimed to determine what proportion of children who are in close contact with immigrant tuberculosis (TB) patients are infected with Mycobacterium tuberculosis. For 1.5 yrs, 14 municipal health services in The Netherlands collected data from all non-Dutch TB patients and their contacts. Close contacts aged < 16 yrs received a tuberculin skin test (TST). A positive TST was defined as an induration of > or = 10 mm among nonvaccinated children, and > or = 16 mm among bacille Calmette-Guérin-vaccinated children. In total, 244 patients had 359 close contacts aged < 16 yrs. Nine out of the 359 (2.5%) had TB. A TST test was given to 298 out of the 359 (83%). Of the 115 contacts of 44 extrapulmonary TB patients, three (3%) had a positive TST. Of the 186 contacts of 58 positive pulmonary TB patients, 30 (16%) had a positive TST. Contacts of sputum smear-positive patients significantly more often had a positive TST (25%), compared with the contacts of sputum smear-negative patients (7%). Children born abroad significantly more often had a positive TST (20%) than children born in The Netherlands (5%). In conclusion, the prevalence of active tuberculosis and latent tuberculosis infection among children who are close contacts of immigrant tuberculosis patients is high and warrants an expansion of contact investigation.
Subject(s)
Contact Tracing , Emigration and Immigration , Mycobacterium tuberculosis/isolation & purification , Tuberculosis, Pulmonary/epidemiology , Tuberculosis, Pulmonary/etiology , Adolescent , Adult , Age Factors , Analysis of Variance , BCG Vaccine , Child , Child, Preschool , Communicable Disease Control/methods , Female , Humans , Logistic Models , Male , Mass Screening/methods , Middle Aged , Multivariate Analysis , Netherlands/epidemiology , Population Surveillance , Prevalence , Risk Assessment , Severity of Illness Index , Tuberculosis, Pulmonary/diagnosisABSTRACT
OBJECTIVE: To estimate the coverage of bi-annual follow-up screening for tuberculosis amongst immigrants, excluding asylum seekers. DESIGN: Retrospective cohort study. METHODS: Participation in bi-annual chest X-ray screening during the first 18 months was recorded for immigrants who underwent entry screening in 1996 in the following Dutch municipal health services (MHS's): Zuid-Kennemerland (Haarlem), Flevoland (Lelystad), Midden-Brabant (Tilburg) en West-Friesland (Hoorn). The number of immigrants that had left the country before the subsequent screening was taken into account in the Zuid-Kennemerland MHS data on screening coverage. RESULTS: Of the 2147 immigrants who underwent entry screening in 1996 (48% men and 52% women; 68% aged 15-34 years), 1075 (50%; range: 29-76) returned for the first follow-up screening and 620 (29%; 21-61) returned for the second. In MHS Zuid-Kennemerland, 113 of the 777 immigrants who had a chest X-ray at entry had left the country before the first follow-up screening, and another 89 had left before the second. Of the remaining persons, who were probably still in the Netherlands, 454 (68%; 454/777 = 58%) returned for the first follow-up screening, and 166 (29%; 166/777 = 21%) returned for the second. CONCLUSION: The coverage of screening for tuberculosis in immigrants decreased after the obligatory entry screening, even when corrected for those who left the country.
Subject(s)
Emigration and Immigration/statistics & numerical data , Mass Chest X-Ray/statistics & numerical data , Patient Dropouts/statistics & numerical data , Tuberculosis, Pulmonary/prevention & control , Adolescent , Adult , Aged , Cohort Studies , Emigration and Immigration/legislation & jurisprudence , Female , Humans , Male , Middle Aged , National Health Programs/statistics & numerical data , Netherlands/epidemiology , Retrospective Studies , Tuberculosis, Pulmonary/diagnostic imagingABSTRACT
OBJECTIVE: To compare data of some features and treatment results of asylum seekers with TB in whom the diagnosis was made by a roentgenologic examination of the thorax a short time after arrival in the Netherlands with data of other TB-patients. DESIGN: Retrospective. SETTING: The Netherlands. METHOD: Data of patients with tuberculosis are collected in the National Tuberculosis Register. In 1993 this register included data of 1582 patients, among them III asylum seekers in whom TB was diagnosed after obligatory roentgenologic screening a short time after arrival in the Netherlands. The reason for examination, presence of complaints, forms of tuberculosis, presence of bacteriological confirmation, drug-resistance and results of treatment of them were compared with the data of other asylum seekers (n = 169) and other TB-patients (n = 1302). RESULTS: The diagnosis TB in asylum seekers who are screened obligatorily was bacteriologically confirmed in 34 of III (31%) of the cases, while in 72 of 169 (43%) other asylum seekers and in 729 of 1302 (56%) of the other TB-patients (p < 0.001 for the difference between obligatory screened asylum seekers and other TB-patients). Resistance against isoniazide and streptomycin was more frequent in asylum seekers (n = 106; 13% and 19% respectively) than in Dutch patients (n = 338; 2% and 3% respectively) (p < 0.001). Obligatory screened asylum seekers with bacteriologically confirmed TB were cured in 82% of the cases and this did not differ from the other groups. Asylum seekers and other immigrants showed a higher default-rate than Dutch patients did (p < 0.001). CONCLUSION: Among asylum seekers with tuberculosis discovered by the first obligatory screening was a lower percentage of bacteriological confirmation and a higher percentage of drug-resistance and defaulters. The results of treatment of asylum seekers with bacteriologically confirmed TB were good.
