Pooled PCR testing strategy and prevalence estimation of submicroscopic infections using Bayesian latent class models in pregnant women receiving intermittent preventive treatment at Machinga District Hospital, Malawi, 2010

Table 1 PCR results compared to histology findings

Histological status	Overall	Peripheral	Placental
	PCR (+)/total (%)	Positive/total (%)	Positive/total (%)
Active	28/39 (71.8%)	13/17 (76.5%)	15/22 (68.2%)
Acute	16/22 (72.7%)	7/10 (70%)	9/12 (75%)
Chronic	12/17 (70.6%)	6/7 (85.7%)	6/10 (60%)
Negative	24/578 (4.2%)	17/250 (6.8%)	7/328 (2.1%)
Past infection	10/140 (7.1%)	7/74 (9.5%)	3/66 (4.5%)
No infection	14/438 (3.2%)	10/176 (5.7%)	4/262 (1.5%)

Proportion of PCR positives in each histologic classification is presented for each sample type analysed: overall and by blood sources (peripheral or placental). Histologic results are separated into active infection (acute and chronic) and negative (past infection or no infection).

ISSN: 1475-2875