
| UNAIDS Technical Update Mother-to-Child Transmission of HIV - Update 1.2 (UNAIDS, 2001, 9 p.) |
|
Health policy makers need further guidance on the following policy issues:
1. When and where to introduce Nevirapine?
Potential criteria:
· Incidence of MTCT· Knowledge of safety/adverse effects and need for further research
· Experience with large-scale implementation of ARV regimens already in place (short/long regimen of ZDV)
· Replacement of AZT short regimen by Nevirapine among breastfeeding women
· Affordability verses health budget
· Operational feasibility: capacity of health system to implement VCCT, deliveries attended, and capacity of systems to reach women/children after the delivery
· Nevirapine procurement
· Role of the private sector in offering treatment
2. Implication for counseling on infant feeding?
Instead of AZT and replacement feeding, potential criteria for exclusive breast-feeding and Nevirapine with or without a postnatal component:
· Under 5 mortality· Affordability of replacement feeding
· Marginal cost-effectiveness of adding AZT or NVP during the exclusive breastfeeding period to the short regimen of NVP
· Present Breast-feeding patterns, notably exclusive breastfeeding
· Stigma associated with replacement feeding
3. Implications for relevance of VCCT
Potential criteria:
· Is it already in place?· Discrimination/stigma linked to HIV positive test results
· Access and quality and effective use of MCH services
· Other potential benefits to intervene: development of user-friendly services, primary prevention among women of reproductive age
Countries of the East Asia and Pacific Region can be grouped in function of the particular context including health system development and resources available. Within each group, different packages can be developed in function of the prevalence and incidence of HIV in specific areas.
| |
Group A (Thailand, Malaysia) |
Group B: Myanmar, Cambodia/PNG |
Group C: Vietnam, China, Philippines/Indonesia |
|
High prevalence areas |
Full package |
Improve access |
Test full package PMTCT+ Improve quality MCH |
|
Low prevalence/high incidence areas |
VCT-ARV-IFC + PREVENT |
Improve access to MCHPREVENT package |
Improve quality MCHPREVENT package |
|
Low prevalence/low incidence areas |
VCT-ARV-IFC |
Exclusive BF |
Exclusive BF |
Some countries already identified the key packages to be implemented in their own context. The tentative packages for Vietnam, Myanmar and Cambodia are presented below as national managers developed them.
1 Vietnam
The Vietnam approach proposes to implement several different packages into the UNICEF country program within existing health care services. Four main packages are proposed. The most comprehensive is to be implemented in three provinces (Quang Ninh, An Giang, Kien Giang) and two cities (HCMC, Haiphong)
2 Cambodia
Four different groups of health facilities providing antenatal and obstetric services were identified in which activities to prevent Mother To Child Transmission of HIV could be implemented. A specific package of activities was developed for each of these groups. (see tables 1 and 2 below). The groups were the following: MCH Hospitals which are to represent quality standards in public services: the National MCH center and the Calmette hospital
· Hospitals to represent standards of care in the private sector (not for profit and for profit)· A pilot district (including hospital and satellite health centers) in which the full package of improved reproductive health and enhanced response to HIV (including prevention in high risk groups and care) is to be offered and a model tested for future extension on a national scale.
· All the other health centers/antenatal clinics throughout the countries in which a minimum package to respond to HIV among the population of reproductive age is to be offered
| |
All health centers |
One pilot district including hospital and satellites health centers |
Public Hospital | |
Private Hospital |
|
Site chosen |
|
Battambang |
National MCH, |
Calmette | |
|
Phase Alpha: reducing HIV+ pregnancies |
100% condom policy in commercial sex places |
100% condom policy in commercial sex places |
Counseling in Treatment of STIs Information |
Family Planning |
|
|
Phase 1: Inform in ANC |
Anaemia prophylaxis |
Treatment of STIs |
VCCT | |
Idem |
|
Phase 2: Prophylactic treatment |
UP |
ARV |
HIV+ mothers: |
HIV - and unknown status |
Idem public |
|
Phase 3: Care of children and mothers |
Exclusive Breastfeeding up to 6 months |
Infant feeding counseling IMCI |
HIV+ mothers: Infant feeding counseling for HIV+ mothers: BMS or EBF, early cessation and complementary food IMCI |
HIV - and unknown status mothers |
Idem public |
|
Phase w | |
Communication for Acceptance raising |
Home based Care | | |
3 Myanmar
In Myanmar activities of prevention of Mother To Child Transmission of HIV are proposed to be mainstreamed in the existing IMMCI program and in the HIV/AIDS project areas. In addition several pilot districts (districts with high HIV prevalence) are to implement the full package of prevention including ARV.
|
Myammar |
IMMCI |
HIV AIDS project areas |
Pilot 3 districts |
|
Phase Alpha: Prevent |
|
Life Skills |
Life Skills: in out-of school |
|
Phase 1: Inform |
Quality ANCSTIs |
|
VCT |
|
Phase 2: Prophylaxis |
Safe delivery |
|
ARV |
|
Phase 3: Care |
Exclusive BF 6m |
Exclusive BF 6m |
Infant feeding counseling |
|
Phase Omega: Support |
| |
TB |
1. There is now a large range (figure 11) of potential interventions, which are effective for PMTCT. In this menu of interventions each country is to choose the intervention most appropriate to its own epidemiological, economic, and health system situation.
2. Although the intervention regimens are still not fully defined, there is enough information about ARV and VCCT to move towards to scaling up. VCCT and ARV are cost-effective strategies that reduce MTCT regardless of the mode of infant feeding.
3. As illustrated in Phayao Province, Northern Thailand, 1998: 97% of pregnant women had ANC, 94% were tested for HIV, of which 4% tested positive; 95% of these returned for confirmation, 76% initiated ARV treatment and 71% finished the treatment. This implies that in large-scale PMCT programs, VCCT and ARV effectively covered 69% of the estimated total number of HIV+ mothers.
4. In contrast, current knowledge points to the dangers of going to scale with replacement feeding in contexts where women will have low education, low access to water, low economic means, and strong cultural pressures to breastfeed. Emphasising replacement feeding in those contexts may fuel the mixed feeding practice for mothers who will have no other choice than breastfeeding, yet will try to follow the recommendations to replacement feed.
5. Regimens combining ARV during delivery, exclusive breastfeeding with ARV prophylaxis in children followed by early cessation of breastfeeding are likely to prove very cost-effective in reducing MTCT on a population basis and may even prove more effective in improving child survival than replacement feeding plus ARV.
6. The approach to envisioning implementation is to be discussed: are women to be recipients or stakeholders? VCCT can be seen as an empowering long-term oriented strategy, whereas ARV is an outcome oriented emergency strategy. Should both progress at the same pace or should we phase the implementation of emergency measures and capacity building measures along different time and space schedules?
7. A core package (or several options of core packages to depend on the country context) to be offered to HIV+ pregnant women and their families is to reduce not only MTCT but also overall U5 mortality rate. What is the right balance for scaling up between ARV only and a full package (life skills, condoms, VCCT, ARV, replacement feeding) with support to HIV affected families including orphans?
8. There is a need to scale up in order to broaden health economic studies beyond the cost-effectiveness of alternative regimens to address MTCT in isolation (well established now and of little concern to countries) to analysis of cost-effectiveness in terms of child survival, allocative efficiency, and affordability. This includes:
· Analysis of the costs and benefits in terms of both child survival and decrease of the HIV epidemic from the full package of MCH services to be offered to HIV+ pregnant women· Analysis of the opportunity costs of investing in this intervention as compared to investing in other activities to decrease child and maternal mortality as well as the spread of HIV
· The development of financing scenarios taking into account government, household (identifying the demand of women), and donor contributions
|
ARV: |
anti-retrovirals |
|
BCC: |
Birth Canal cleansing |
|
BF: |
Breastfeeding |
|
BMS: |
Breast-milk substitutes |
|
EBF: |
Exclusive breastfeeding |
|
IFC: |
Infant Feeding Counseling |
|
IMCI: |
Integrated Management of Childhood Illnesses |
|
SOP: |
Safe Obstetric Practices |
|
STIs: |
Sexually transmitted infections |
|
UP: |
Universal Precautions |
|
VCCT: |
Voluntary Counseling and testing |
1. Behets F, Bertozzi S, Kasali M, et al. Successful use of
pooled sera to determine HIV-1 seroprevalence in Zaire with development of
cost-efficiency models. JAIDS 1990;8:737-41.
2. Campbell CH, Marum E, Alwanoedyegu MG, et al. The role of HIV counselling and testing in the developing world. AIDS Education and Prevention 1997;9:B.
3. Coutsoudis A, Kubendran P, Spooner E, et al. Influence of infant-feeding patterns on early mother to child transmission of HIV-1 in Durban, South Africa: a perspective cohort study. Lancet 1999;354:471-76.
4. Dabis F, Mandelbrot L, Leroy V, et al. A 15-month efficacy of a maternal short regimen of oral zidovudine (ZDV) aimed to reduce vertical transmission of HIV in West Africa. (Abstract 054A) In: Plenary session abstracts from the second conference on global strategies for the prevention of HIV transmission from mothers to infants 1999.
5. Dabis F, Msellati P, Meda N, et al. DITRAME Study Group 6-month efficacy, tolerance, and acceptability of a short regimen of oral zidovudine to reduce vertical transmission of HIV in breastfed children in Cote dIvoire and Burkina Faso: a double-blind placebo-controlled multi-centre trial. Lancet 1999; 353:786-792.
6. Grosskurth H, Mosha F, Todd J, et al. Impact of improved treatment of sexually transmitted diseases on HIV infection in rural Tanzania: randomized controlled trial. Lancet 1995;346:530-36.
7. Guay LA, Musoke P, Fleming T, et al. Intrapartum and neonatal single-dose Nevirapine compared with zidovudine for the prevention of mother to child transmission of HIV-1 in Kampala, Uganda: (HIVNET 012) randomised trial. Lancet 1998;354:795-802.
8. Guay LA, Musoke P, Fleming T, et al. A randomized trial of single dose Nevirapine to mother and infant versus azidothymidine in Kampala, Uganda for prevention of mother to child transmission of HIV-1 (HIVNET 012). (Abstract 013) In: Plenary session abstracts from the second conference on global strategies for the prevention of HIV transmission from mothers to infants 1999.
9. Jackson B. A Phase IIB randomized, controlled trial to evaluate the safety, tolerance, and HIV vertical transmission rates associated with short course Nevirapine (NNP) vs. short course zidovudine (ZDV) in HIV infected pregnant women and their infants in Uganda. Executive Summary 1998.
10. Leroy V, Newell ML, Dabis F. International multicenter pooled analysis of late postnatal mother-to-child transmission of HIV infection. Lancet 1998;352:597-600.
11. Marseille E, Kahn JG, Mmiro F, et al. Cost effectiveness of single-dose Nevirapine regimen for mothers and babies to decrease vertical HIV-1 transmission in sub-Saharan Africa. Lancet 1999;354:803-9.
12. Miotti G, Taha ET, Newton LK, et al. HIV transmission Through Breastfeeding: A study in Malawi. JAMA 1999;282:744-9.
13. Nduati R. Clinical studies of breast vs. formula feeding. Presentation at the second conference on global strategies for the prevention of HIV transmission from mothers to infants 1999.
14. Perriens JH, Magazani K, Kapila N, et al. Use of rapid test and an ALISA for HIV antibody screening of pooled serum samples in Lumbumbashi, Zaire. J Virol Meth 1993;41:2313-21.
15. Prescott N. The Implications of antiretroviral treatments: setting priorities for government involvement with antiretrovirals. World Health Organization/UNAIDS 1997;9:57-62.
16. Shaffer N, Chuachoowong R, Mock PA, et al. Short-course zidovudine for perinatal HIV-1 transmission in Bangkok, Thailand: a randomised controlled trial. Lancet 1999;353:773-80.
17. Shaeffer N, Roongpisuthipong A, Siriwasin W, et al. Maternal Virus Load and Perinatal Human Immunodeficiency Virus Type 1 Subtype E Transmission, Thailand. JID 1999;179:590-9.
18. Thaineua V, Sirinirund P, Soucat A, et al. From research to practice: use of short course zidovudine to prevent mother-to-child HIV transmission in the context of routine health care in Northern Thailand. SEA J Trop Med PH 1998;29:429-442.
19. Victora CG, Vaughan JP, Lombardi C, et al. Evidence for protection by breastfeeding against infant deaths from infectious disease in Brazil. Lancet 1997(ii);319-322.
20. Wade NA, Birkhead GS, Warren TT, et al. Abbreviated regimens of zidovudine prophylaxis and perinatal transmission of the human immunodeficiency virus. NE J Med 1998;339:1409-14.
21. Wiktor SZ, Ekpini E, Karon JM, et al. Short-course oral zidovudine for prevention of mother-to-child transmission of HIV-1 in Abidjan, Cote dIvoire: a randomized trial. Lancet 1999;353:781-85.