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Volume 27, Number 3—March 2021
Research

Decline of Tuberculosis Burden in Vietnam Measured by Consecutive National Surveys, 2007–2017

Hai Viet Nguyen, Hoa Binh NguyenComments to Author , Nhung Viet Nguyen, Frank Cobelens, Alyssa Finlay, Cu Huy Dao, Veriko Mirtskhulava, Philippe Glaziou, Huyen T.T. Pham, Petra de Haas, and Edine Tiemersma
Author affiliations: National Tuberculosis Programme, Hanoi, Vietnam (H.V. Nguyen, H.B. Nguyen, N.V. Nguyen, C.H. Dao, H.T.T. Pham); Amsterdam University Medical Centers, Amsterdam, the Netherlands (H.V. Nguyen, F. Cobelens); US Centers for Disease Control and Prevention, Vietnam Office, Hanoi (A. Finlay); KNCV Tuberculosis Foundation, Den Haag, the Netherlands (V. Mirtskhulava, P. de Hass, E. Tiemersma); World Health Organization, Geneva, Switzerland (P. Glaziou).

Main Article

Table 2

Results of laboratory testing and TB cases during 2 national TB prevalence surveys in Vietnam, 2007 and 2017*

 First survey, 2007
Second survey, 2017
 p value†
No. participants
 % Participants
No. participants
 % Participants
Total participants 94,156 100.0 61,763 100.0 NA
Participants screened positive
 7,529
 8.0
4,595
 7.4
 <0.001
DSSM‡
Negative 6,659 7.07 4,109 6.65 0.001
Any positive 118 0.13 77 0.12 0.835
Positive scanty 35 0.04 36 0.06 0.056
Positive 1+ 47 0.05 26 0.04 0.485
Positive 2+ 21 0.02 7 0.01 0.114
Positive 3+ 15 0.02 8 0.01 0.636
Not reported§
 752
 0.80
409
 0.66
 0.003
LJ culture
MTB growth 218 0.23 125 0.20 0.230
NTM growth 10 0.01 37 0.06 <0.001
No growth 6,513 6.92 3,590 5.81 <0.001
Contaminated 34 0.04 245 0.40 <0.001
Not reported§
 754
 0.80
598
 0.97
 <0.001
TB case 218 0.23 125 0.20 0.204
DSSM(+) – LJ(+) 105 0.11 38 0.06 0.001
DSSM(–) – LJ(+) 113 0.12 87 0.14 0.298

*DSSM, direct smear microscopy; LJ, Lowenstein-Jensen; MTB, Mycobacterium tuberculosis; NA, not applicable; NTM, nontuberculosis mycobacteria; TB, tuberculosis; +, positive; –, negative..
†Pearson χ2 test to compare characteristics between the first and the second surveys.
‡Direct smear microscopy of the morning sample only.
§Test result was unknown or no sample available.

Main Article

Page created: January 11, 2021
Page updated: February 21, 2021
Page reviewed: February 21, 2021
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