is(keypoint:typicalX-ray,Surgicalindications,contraindication)Brodie’sabscess,Garré’sOsteomylitis,Osteomylitisaftertrauma(acquaintance)5’infectiousspondylitis(acquaintance)5’Suppurativearthritis(acquaintance)5’TuberculosisofbonesandjointsIntroduction(Masterkey:clinicalfeatures,treatment)15’plications10’Jointtuberculosis(acquaintance)5’ABarthrocleisisLimbshorteningDefinitioninfectionTheprocessofmicrobialmultiplicationwithinhosttissuesleadingtotissuedamageandinflammation.ColonisationharmlessContaminationTheabnormalpresenceofmicrobesderivedfromtheexternalenvironmentinasite,tissue,structureorsample.InfectionsofBoneandJointPyogenicinfectionSuppurativeosteomyelitispyogenicarthritisSpecialInfection:pactbone,spongybone,myeloidtissue?urmainlyinchildren,adultsrarelyPrognosisisconcernedwithtreatment.