Retrospektív tanulmányunkban, amely 2002-ben regisztrált 66 budapesti hajléktalantól származó M. tuberculosis törzset ölel fel, egy helyi mikrojárványt igazoltunk Budapest legmagasabb tuberculosis-incidenciájú kerületében. A molekuláris genetikai vizsgálatok (IS 6110 -RFLP DNS-ujjlenyomat, spoligotyping, mycobacterial interspred repetitive unit < MIRU > és katG - gyrA tipizálás) egy helyi eredetű, Budapest-specifikus M. tuberculosis törzs jelenlétét igazolták. Ugyancsak figyelemre méltó a világszerte elterjedt, virulens Beijing-törzs hiánya. Eredményeink arra utalnak, hogy a hajléktalanok között a tuberculosis kontrolljára nagyobb figyelmet kell fordítani, és a megelőzés területén komolyabb lépésekre van szükség.
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