AIDS (London, England) · 1998
An outbreak of multidrug-resistant tuberculosis involving HIV-infected patients of two hospitals in Milan, Italy. Italian Multidrug-Resistant Tuberculosis Outbreak Study Group.
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Moro M L, Gori A, Errante I, Infuso A, Franzetti F, Sodano L, Iemoli E
Аннотация
OBJECTIVE: To describe an outbreak of multidrug-resistant tuberculosis (MDR-TB), amongst HIV-infected patients, spread from one hospital in Milan to another.
DESIGN: Descriptive epidemiological investigation and molecular typing.
METHODS: All cases identified by intensive case-finding were described in terms of clinical characteristics, previous nosocomial exposure to an infectious MDR-TB patient, previous stays in other institutional settings where exposure to MDR-TB could have occurred, and restriction fragment length polymorphism (RFLP) pattern.
RESULTS: Between October 1991 and July 1995, 116 cases of MDR-TB were identified (85 at hospital A and 31 at hospital B). A single case patient, infected at hospital A, introduced the strain into hospital B. Eighty-two of the 92 strains available for fingerprinting revealed an identical pattern; 10 strains had unique RFLP patterns. Nosocomial exposure to an infectious MDR-TB patient was ascertained for 39 of the 56 patients with the 'outbreak' RFLP strain at hospital A (69.6%) and for 24 of the 26 patients at hospital B (92.3%). The median duration of exposure was 32 days at hospital A and 40 days at hospital B. For eight patients with the outbreak strain, exposure was determined to have probably occurred in other hospitals, in the community or in prison.
CONCLUSIONS: This is the largest nosocomial outbreak of MDR-TB reported in Europe. Exposure to MDR-TB cases in other institutions caring for HIV-infected patients probably contributed to the spread of this epidemic. Strict control measures should be immediately adopted in order to prevent the spread of TB amongst HIV-infected patients in institutional settings in Europe.
DESIGN: Descriptive epidemiological investigation and molecular typing.
METHODS: All cases identified by intensive case-finding were described in terms of clinical characteristics, previous nosocomial exposure to an infectious MDR-TB patient, previous stays in other institutional settings where exposure to MDR-TB could have occurred, and restriction fragment length polymorphism (RFLP) pattern.
RESULTS: Between October 1991 and July 1995, 116 cases of MDR-TB were identified (85 at hospital A and 31 at hospital B). A single case patient, infected at hospital A, introduced the strain into hospital B. Eighty-two of the 92 strains available for fingerprinting revealed an identical pattern; 10 strains had unique RFLP patterns. Nosocomial exposure to an infectious MDR-TB patient was ascertained for 39 of the 56 patients with the 'outbreak' RFLP strain at hospital A (69.6%) and for 24 of the 26 patients at hospital B (92.3%). The median duration of exposure was 32 days at hospital A and 40 days at hospital B. For eight patients with the outbreak strain, exposure was determined to have probably occurred in other hospitals, in the community or in prison.
CONCLUSIONS: This is the largest nosocomial outbreak of MDR-TB reported in Europe. Exposure to MDR-TB cases in other institutions caring for HIV-infected patients probably contributed to the spread of this epidemic. Strict control measures should be immediately adopted in order to prevent the spread of TB amongst HIV-infected patients in institutional settings in Europe.