MOESM5 of Effects of Plasmodium falciparum infection on umbilical artery resistance and intrafetal blood flow distribution: a Doppler ultrasound study from Papua New Guinea

Additional file 5. Associations of recent malaria infection with Doppler indices. A total of 533 malaria tests preceded the Doppler scan by no more than 6Â weeks and were thus considered â recentâ . In this category, 17 were positive for P. falciparum with either method (13 by qPCR; 11 by LM) and two were positive for P. vivax, by qPCR. Of these, seven infections were sub-microscopic. These data are not shown in the main text as the numbers of recent malaria episodes were too low to confidently perform statistical analyses.