Figure 3.

Prevalence of P. falciparum by age diagnosed by microscopy and RFLP-dHPLC. Density class 1 for 1--10 parasites per 100 thick film fields; Density class 2 for 11--100 parasites per 100 fields; Density class 3 for 1--10 parasites per single field; Density class 4 for 11--100 parasites per single field; Density class 5 for > 100 parasites per single field (WHO, Basic Malaria Microscopy, Geneva, Switzerland)