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Incidence and molecular typing of Mycobacterium kansasii in a defined geographical area in Catalonia, Spain

Published online by Cambridge University Press:  12 May 2004

M. SANTIN
Affiliation:
Department of Infectious Diseases, Hospital Universitari de Bellvitge, Barcelona, Spain
F. ALCAIDE
Affiliation:
Department of Microbiology, Hospital Universitari de Bellvitge, Barcelona, Spain
M. A. BENITEZ
Affiliation:
Department of Microbiology, Hospital Universitari de Bellvitge, Barcelona, Spain
A. SALAZAR
Affiliation:
Department of Infectious Diseases, Hospital Universitari de Bellvitge, Barcelona, Spain
C. ARDANUY
Affiliation:
Department of Microbiology, Hospital Universitari de Bellvitge, Barcelona, Spain
D. PODZAMCZER
Affiliation:
Department of Infectious Diseases, Hospital Universitari de Bellvitge, Barcelona, Spain
G. RUFI
Affiliation:
Department of Infectious Diseases, Hospital Universitari de Bellvitge, Barcelona, Spain
J. DORCA
Affiliation:
Department of Respiratory Diseases, Hospital Universitari de Bellvitge, Barcelona, Spain
R. MARTIN
Affiliation:
Department of Microbiology, Hospital Universitari de Bellvitge, Barcelona, Spain
F. GUDIOL
Affiliation:
Department of Infectious Diseases, Hospital Universitari de Bellvitge, Barcelona, Spain
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Abstract

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A retrospective population-based study was conducted between January 1990 and December 1998 to investigate the incidence of Mycobacterium kansasii disease and the heterogeneity of the isolates in a well-defined geographical area in Catalonia, Spain. A total of 136 patients were identified. Overall incidence and incidence in AIDS patients was 1·5 (95% CI 1·2–1·8) and 1089·6 (95% CI 689–1330) cases/100000 persons per year respectively, which is comparable to that reported from most of other geographical areas. Surprisingly, although 7 subtypes of M. kansasii have been consistently reported, in the present study 91 of the 93 isolates (97·8%) tested for genotype were subtype I, regardless of HIV status of the patients. In conclusion, the high rate of infection observed in the AIDS population contributes significantly to the burden of the M. kansasii disease in our area. M. kansasii disease in our geographical area was almost exclusively caused by subtype I regardless of HIV status.

Type
Research Article
Copyright
© 2004 Cambridge University Press