Dear April,
Sometimes the recode will vary slightly depending on the country. For the Malawi MIS 2014 the variable hml32 options are shown below.
To calculate Malaria prevalence according to RDT for the Malawi MIS 2014 you can use the following code

use "MWPR71FL.DTA", clear
*Weighting 
g wgt = hv005/1000000

*Parasitemia (vis RDT) in children 6-59 months
                cap gen rdtmalpos=0
                cap replace rdtmalpos=(hml35==1) 
                cap lab var rdtmalpos "Parasitemia (via RDT) in children 6-59 months"

* Proportion of children 6-59 months old with malaria infection (RDT)
tab rdtmalpos if hc1>=6 & hc1<=59 & hv103==1 & hml33==0 & (hml35==0|hml35==1) [iweight=wgt]