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Molecular Detection of Fastidious and Common Bacteria as Well as Plasmodium spp. in Febrile and Afebrile Children in Franceville, Gabon.

Malaria was considered as the main cause of fever in Africa. However, with the roll back malaria initiative, the causes of fever in Africa may change. This study aimed to evaluate the prevalence of bacteria and Plasmodium spp. in febrile and afebrile (controls) children from Franceville, Gabon. About 793 blood samples from febrile children and 100 from controls were analyzed using polymerase chain reaction (PCR) coupled with sequencing. Plasmodium spp. was the microorganism most detected in febrile (74.5%, 591/793) and controls (13%, 13/100), P < 0.0001. Its coinfection with bacteria was found only in febrile children (P = 0.0001). Staphylococcus aureus was the most prevalent bacterium in febrile children (2.8%, 22/793) and controls (3%, 3/100). Eight cases of Salmonella spp. (including two Salmonella enterica serovar Paratyphi) and two of Streptococcus pneumoniae were found only among febrile children. Borrelia spp. was found in 2 controls while Rickettsia felis was detected in 10 children (in 8 febriles and 2 afebriles). No DNA of other targeted microorganisms was detected. Plasmodium spp. remains prevalent while Salmonella spp., Staphylococcus aureus, and Streptococcus pneumoniae were common bacteria in Gabon. Two fastidious bacteria, Rickettsia felis and Borrelia spp., were found. Inclusion of controls should improve the understanding of the causes of fever in sub-Saharan Africa.