Csb. Lambregtsvanweezenbeek et al., ORIGIN AND MANAGEMENT OF PRIMARY AND ACQUIRED DRUG-RESISTANT TUBERCULOSIS IN THE NETHERLANDS - THE TRUTH BEHIND THE RATES, The international journal of tuberculosis and lung disease, 2(4), 1998, pp. 296-302
SETTING: The Netherlands, May 1994 to May 1996. OBJECTIVE: 1) To estim
ate to what extent drug-resistant tuberculosis was acquired or recentl
y transmitted in The Netherlands, 2) to assess the relevance of drug r
esistance data as routinely collected, and 3) to describe case managem
ent. DESIGN: Prospective descriptive study. Patients diagnosed with dr
ug-resistant tuberculosis were interviewed. Information on patient man
agement and contact tracing was collected. IS6110 restriction fragment
length polymorphism (RFLP) patterns of all strains were compared with
those of the National RFLP library and clusters were analyzed. RESULT
S: In total 193 cases were included in the study. Acquired drug resist
ance (ADR) was rare. Dutch ADR patients reported receiving treatment a
long time previously (mean age 58, mean treatment interval 23 years).
Most foreign ADR patients had been treated recently in their country
of origin. Of 151 primary drug-resistant (PDR) cases, 129 (85%) were f
oreign-born, of whom few (8%-19%) had been infected in The Netherlands
. Few Dutch PDR cases had been infected recently (mean age 49 years).
Rifampicin resistance was more frequently observed in foreign ADR case
s than in foreign PDR cases (28% vs 5%; P < 0.001). One third of cases
had not been treated according to treatment guidelines. CONCLUSION: O
nly a small proportion of drug-resistant cases resulted from recent in
fection or treatment in The Netherlands. General rates of ADR and PDR
do not reflect current Dutch programme performance. For programme moni
toring, ADR/PDR rates and their trends must be reported and evaluated
in Dutch and foreign patients separately.