Infecciosa (38%) - pielonefrite, sinusite, mastoidite, pneumonia, abcessos, osteomielite, endocardite, TB, brucelose, bartonelose, leptospirose,febre Q, Lyme, salmonelose, tularémia, EBV, CMV, hepatite, HIV, adenovírus, enterovírus, dengue, blastomicose, histoplasmose, coccidioidomicose, leishmaniose, malária, toxoplasmose, larva migrans visceral