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Table 2 Evaluation of WBC contamination of PRBCs purified by three methods.

From: One-step concentration of malarial parasite-infected red blood cells and removal of contaminating white blood cells

Purification method WBCs/PRBCs WBC removal (%)
Before purification After purification
Percoll 126.5 ± 6.3/5,000 124.4 ± 4.3/5,000 0
Nycodenz 126.5 ± 6.3/5,000 126.5 ± 7.0/5,000 0
Magnetic 126.5 ± 6.3/5,000 8.0 ± 2.1/5,000 93.7 ± 1.7
  1. WBCs before and after purification with Percoll, Nycodenz or magnetic methods were counted blindly and independently by two microscopists. Seven infected blood samples containing 5–10% parasitaemia were independently used in this study.