PMTCT, and National's - Health Systems Trust
PMTCT, and National's - Health Systems Trust
PMTCT, and National's - Health Systems Trust
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6.3 Infant Testing <strong>and</strong> Outcomes<br />
BACKGROUND<br />
One of the anticipated aims of the national <strong>PMTCT</strong> pilot programme was to assess the effectiveness<br />
of this programme in reducing mother-to-child transmission of HIV. A great deal of public<br />
anticipation of the “results” from these pilot sites has therefore been generated. It is important,<br />
however, to clarify that the design of the pilot sites allowed for an evaluation of the operational<br />
issues associated with providing <strong>PMTCT</strong> care but was not appropriate for determining transmission<br />
rates. A prospective cohort study has been commissioned by the National Department of <strong>Health</strong><br />
in order to measure vertical transmission rates. However, important lessons can be learnt from<br />
this evaluation relating to operational issues associated with the testing of infants.<br />
The primary objective of the <strong>PMTCT</strong> programme is to reduce the transmission of HIV from a<br />
mother to her infant. The national <strong>PMTCT</strong> protocol for the pilot sites stipulates that all children<br />
should be tested for HIV 12 months after delivery. If the infant tests positive at 12 months they<br />
should be retested at 15 months to ensure that the 12-month test was not a false-positive test<br />
due to residual maternal antibodies in the infant. For mothers continuing to breastfeed after 12<br />
months, an HIV test should be performed at least 3-months after the mother ceases breastfeeding.<br />
This section will present key findings from the evaluation that relate to infant testing as well as<br />
presenting an alternative testing strategy to improve the follow up component of <strong>PMTCT</strong>.<br />
KEY FINDINGS FROM THE EVALUATION<br />
Uptake of Infant HIV Testing<br />
This evaluation found fairly low uptake of infant HIV testing at 12 months across most provinces.<br />
Table 1 displays the infant testing rates in all 9 provinces. It is difficult to draw conclusions from<br />
this data as some provinces test infants at 9 months <strong>and</strong> others at 12 months. In addition, some<br />
provinces changed their testing protocol from 9 months to 12 months during 2002 <strong>and</strong> the<br />
researchers were not always able to determine exactly when this change occurred. Specificity<br />
of the rapid HIV ELISA test at 9 months <strong>and</strong> 12 months is only 59% <strong>and</strong> 89% respectively 1 .<br />
Approximately 40% of truly negative infants would therefore test positive at 9 months, making<br />
the data which includes 9 month test results an unreliable indicator of HIV transmission.<br />
A large proportion (50%) of the infants born to mothers who received nevirapine, were not<br />
followed up <strong>and</strong> tested. The HIV status of these infants is therefore unknown <strong>and</strong> could potentially<br />
vary substantially from the results of infants that were followed up <strong>and</strong> tested. It is therefore not<br />
possible to draw any conclusions on impact or effectiveness of the programme from this data.<br />
Table 6.3.1: Infant testing rates<br />
Province<br />
Number of live births<br />
Number of infants tested<br />
for HIV<br />
HIV testing<br />
rate<br />
Number of<br />
infants testing<br />
HIV positive<br />
Eastern Cape 1<br />
Free State 1<br />
Gauteng 2<br />
KwaZulu-Natal 2<br />
Limpopo 1<br />
Mpumalanga 2<br />
North West 1<br />
Northern Cape 1<br />
Data only available for<br />
GDH site<br />
Western Cape 3<br />
TOTALS<br />
305 (Sept 01 – March 02)<br />
129 (Aug 01 – March 02)<br />
403 (May – Dec 01)<br />
470 (Sept – Dec 01)<br />
45 (Nov 01-March 02)<br />
55 (Sept –Dec 01)<br />
11 (July 01 – March 02)<br />
65 (Aug 01 – March 02)<br />
424 (April 01-March 02)<br />
1907<br />
76 (June – Dec 02)<br />
56 (May-Dec 02)<br />
40 (May – Dec 02)<br />
368 (Sept – Dec 02)<br />
17 (Aug – Dec 02)<br />
12 (Sept –Dec 02)<br />
44 (April –Dec 02)<br />
25 (May-Dec 02)<br />
311 (Jan-Dec 02)<br />
949<br />
25%<br />
43%<br />
10%<br />
78%<br />
38%<br />
22%<br />
39%<br />
38%<br />
73%<br />
50%<br />
4<br />
21<br />
3<br />
38<br />
3<br />
3<br />
8<br />
17<br />
73<br />
170 (18%)<br />
Note: 1. Province changed infant testing policy from 9 to 12 months during 2002<br />
2. Province tests infants at 12 months<br />
3. Province tests infants at 9 months<br />
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