Volume 8, Number 11—November 2002
Tuberculosis Genotyping Network, United States
Statewide Molecular Epidemiology of Mycobacterium tuberculosis Transmission in a Moderate- to Low-Incidence State: Are Contact Investigations Enough?
|DNA cluster status of patients’ isolates||No. patients with recent TB||No. patients with probable recent TB||No. patients with reactivated TB||No. patients with unknown time of TB acquisition||Totals|
|Clustered strains with >6 IS6110 copies||89||82||56b||42c||269|
|Clustered strains with <6 IS6110 copies||22||0||0||145||167|
bHistory of previous positive tuberculin skin test or extensive past exposure to a patient.
cFirst patient in a cluster by estimated date of symptom onset and no identified source patient.
dKnown link to another patient outside the study area or timeframe whose isolate had the same DNA fingerprint.