MalawiMalaria, CerebralKwashiorkorPhytic AcidHIV InfectionsPregnancy Complications, ParasiticMalaria, FalciparumChild, HospitalizedRural PopulationStavudineAnemiaPyrimethamineSulfadoxineMalariaPregnancy Complications, InfectiousPregnancyInfant, NewbornPlasmodium falciparumAnthropometryNutritional StatusDeveloping CountriesStreptococcus pneumoniaeCase-Control StudiesAntimalarialsAnti-HIV AgentsSeasonsCross-Sectional StudiesHIV-1PrevalenceProspective StudiesTreatment Outcome