targeting at-risk households: intensified case-finding for tb and hiv
DESCRIPTION
Targeting at-risk households: intensified case-finding for TB and HIV in contacts of TB patients in South Africa. Adrienne E Shapiro , Modiehi H Rakgokong, Richard E Chaisson, Precious Modiba, Reginah Msandiwa, Jonathan E Golub, Ebrahim Variava, Neil A Martinson. - PowerPoint PPT PresentationTRANSCRIPT
Targeting at-risk households: intensified case-finding for TB and HIV
in contacts of TB patients in South Africa
Adrienne E Shapiro, Modiehi H Rakgokong, Richard E Chaisson, Precious Modiba, Reginah Msandiwa, Jonathan E Golub,
Ebrahim Variava, Neil A Martinson
Active/Intensified Case-finding• DOTS is passive case-finding• WHO 3 I’s
• Multiple ICF approaches– Population– Screening algorithm
• Meta-analysis of household contact screening 4.5% TB prevalence in HH contacts– Little data on HIV ICF
Intensified Case-Finding (ICF)
Isoniazid Prophylaxis
Infection Control
Morrison J, Pai M, Hopewell PC. Lancet ID, 2008
Background & Setting
• South Africa HIV &TB:– Annual TB incidence: 948/100,000– 5.7 million HIV+– 94,000 TB deaths/yr in HIV+
• North West Province:- 200 TB admissions/month, 25% mortality- 4th highest provincial HIV prevalence
(18% among 15-24y)
10 km
Study Area
Methods • 800 index TB cases screened • 723 index TB + HH enrolled in 7 months• Study team (nurse + 2 lay counselors) home visit to
evaluate household contacts• Single sputum specimen
– AFB smear– TB culture (MGIT)– Drug susceptibility testing
• VCT, CD4• Referrals as indicated for rx or further evaluation
– All rx in public sector, free
Participant DemographicsIndex
TB CaseHousehold Contacts
p value
Sex N=723 (%) N=2812 (%)
Male 311 (43) 1183 (42)
Female 412 (57) 1627 (58) 0.77
Age (Mean, range) 38 (18-91) 23 (0-92) <0.01
Unemployed (18+) 564 (78) 791 (61) <0.01
Mean # contacts 3.9 --
Living in shack (%) 193 (27) 682 (24) 0.40
Results: TB
2,812 household contacts enrolled (723 HH)
2,146 (76%) gave sputum
666 did not (24%) give sputum
164 (8%) TB dx
1,982 (92%) TB neg
606 (91%) TB unk
95 (58%) Confirmed69 (42%) Probable
60 (9%) on TB rx
Results: HIV 2,812 contacts enrolled (723 HH)
1,610 (57%) VCT
997 (35%) Refused VCT
164 (10%) HIV+
1,446 (90%) HIV neg
HIV unk
32 (19%) CD4<250
97 (59%) CD4>350
205 (7%) known HIV+
99 (48%) on ARVs
36 (22%) CD4 250-350
TB: Index vs. Household ContactIndex TB Case
N=723 (%)HH ContactN=164 (%)
p value
TB dx basis Smear+ 163 (23) 10 (6)Smear- / Culture+ 16 (2) 154 (94) <0.01
Clinical/CXR 544 (75) 0 TB Symptoms 682 (94) 18 (11) <0.01
MDR 3 (0.4) 5 (3) <0.01
HIV status HIV+ 607 (84) 22 (13) <0.01
HIV- 88 (12) 90 (55)HIV unknown 28 (4) 52 (32)
CD4<250 237 (68) 4 (18) <0.01
Contact tracing vs. random sampling
# Cases TB found per household
# Contact Households
# Randomly selected households
0 585 (81%) 350 (99%)1 113 (16%) 4 (1%)2 24 (3%) 03 1 (0.1%) 0
Total # households with >1 TB case 138 (19%) 4 (1%)
Findings
• Undetected TB (& HIV) highly prevalent in HH contacts of TB patients
-TB in contacts less likely to be HIV+ -TB in contacts less likely to have TB symptoms
• Sputum culture required to detect TB actively
• Household case-finding for TB & HIV in the community is feasible
- Welcomed by most households - Potential to adapt existing services in health
district
Acknowledgments• Participants• PHRU field teams• Matlosana Health Dept & Clinics,
NWPG • National Health Laboratory Services,
South Africa• Johns Hopkins University
Center for TB Research; Johns Hopkins School of Medicine; Bloomberg School of Public Health
• Funding: NIH/NIGMS; USAID via URC and ANOVA Health Institute
The views expressed do not necessarily reflect those of USAID or the United States Government.
Extra Slides
Index TB dx basis
Found TB in 0 HH contacts
N (%)
Found TB in >1 HH contacts
N (%)
p-value (X2)
Smear+ 128 (22) 35 (25)
Smear-/ Cx+
14 (2) 2 (1)
Clinical 447 (76) 101 (73) 0.50