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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 />

26

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