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Mycobacterium avium with the bird type IS1245 RFLP profile is commonly found in wild and domestic animals, but rarely in humans.
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2005 (English)In: Scandinavian Journal of Infectious Diseases, ISSN 0036-5548, E-ISSN 1651-1980, Vol. 37, no 1, 15-20 p.Article in journal (Refereed) Published
Abstract [en]

Cervical lymphadenitis is the main manifestation of Mycobacterium avium infection in immunocompetent children. Exposure to birds has been discussed as a source of infection. To clarify from where children acquire the infection, M. avium isolates from different origins were analysed with restriction fragment length polymorphism (RFLP) on insertion sequence IS1245, and compared by computer cluster correlation analysis. This molecular epidemiological tool has previously revealed a distinction between multiband profiles found mainly in strains from humans, and a 3-band/bird type profile in strains isolated mainly from birds. 32 isolates from children were compared with 28 isolates from adults and 45 isolates from animals. We found that 67% of the animal isolates had the bird type profile, also found in 1 sputum isolate from an adult. Strains from children showed only multiband profiles that did not differ significantly from profiles of isolates from adults. All but 2 bird isolates showed the bird type profile. Neither of the remaining 2, which had multiband profiles, clustered with the isolates from children. Our results indicate that the true reservoir of M. avium is unknown. Thus the question of whether or not M. avium can be incriminated as a zoonotic disease remains unanswered.

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2005. Vol. 37, no 1, 15-20 p.
URN: urn:nbn:se:umu:diva-23392DOI: 10.1080/00365540510026850PubMedID: 15764185OAI: diva2:223648
Available from: 2009-06-13 Created: 2009-06-13 Last updated: 2016-05-16

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