Transmission events revealed in tuberculosis contact investigations in London.
Transmission events revealed in tuberculosis contact investigations in London.
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DOI:
10.1038/s41598-018-25149-6
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发表时间:
2018-04-27
影响因子:
4.6
通讯作者:
Anderson C
中科院分区:
文献类型:
--
作者:
Cavany SM;Vynnycky E;Sumner T;Macdonald N;Thomas HL;White J;White RG;Maguire H;Anderson C
Contact tracing is a key part of tuberculosis prevention and care, aiming to hasten diagnosis and prevent transmission. The proportion of case-contact pairs for which recent transmission occurred and the typical timespans between the index case and their contact accessing care are not known; we aimed to calculate these. We analysed individual-level TB contact tracing data, collected in London from 20/01/2011-31/12/2015, linked to tuberculosis surveillance and MIRU-VNTR 24-locus strain-typing information. Of pairs of index cases and contacts diagnosed with active tuberculosis, 85/314 (27%) had strain typing data available for both. Of these pairs, 79% (67/85) shared indistinguishable isolates, implying probable recent transmission. Of pairs in which both contact and the index case had a social risk factor, 11/11 (100%) shared indistinguishable isolates, compared to 55/75 (75%) of pairs in which neither had a social risk factor (P = 0.06). The median time interval between the index case and their contact accessing care was 42 days (IQR: 16, 96). As over 20% of pairs did probably not involve recent transmission between index case and contact, the effectiveness of contact tracing is not necessarily limited to those circumstances where the index case has transmitted disease to their close contacts.
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影响因子:
10
作者:
Cavany SM;Sumner T;Vynnycky E;Flach C;White RG;Thomas HL;Maguire H;Anderson C
通讯作者:
Anderson C
影响因子:
3.7
作者:
Aldridge RW;Shaji K;Hayward AC;Abubakar I
通讯作者:
Abubakar I
影响因子:
9.3
作者:
Lalor MK;Anderson LF;Hamblion EL;Burkitt A;Davidson JA;Maguire H;Abubakar I;Thomas HL
通讯作者:
Thomas HL
影响因子:
10
作者:
Anderson, Charlotte;White, Jacqueline;Dart, Susan
通讯作者:
Dart, Susan
影响因子:
10
作者:
Hamblion EL;Le Menach A;Anderson LF;Lalor MK;Brown T;Abubakar I;Anderson C;Maguire H;Anderson SR;Public Health England Strain Typing Project Board
通讯作者:
Public Health England Strain Typing Project Board