山肾院 Pathogenesis
Pathogenesis
Routes for bacterial invasion of the meninges Colonization of nasopharynx blood menInges cribiform plate defect blood Otitis media meninges brain abscess blood Sinus infection meninges brain abscess Pulmonary Infection blood meninges Endocarditis blood meninges Gastrointestinal tract blood meninges
Routes for bacterial invasion of the meninges
Pathogenesis Organism Site of entr Neisseria meningitidis Nasopharynx Streptococcus pneumoniae Nasopharynx or direct extension across skull fracture(cerebrospinal rhinorrhea) Listeria monocytogenes Gl tract, placenta Haemophilus influenzae Nasopharynx Staphylococcus aureus Bacteremia, skin or foreign body Staphylococcus epidermidis Skin or foreign bod
Neisseria meningitidis Nasopharynx Streptococcus pneumoniae Nasopharynx or direct extension across skull fracture (cerebrospinal rhinorrhea) Listeria monocytogenes GI tract, placenta Haemophilus influenzae Nasopharynx Staphylococcus aureus Bacteremia, skin, or foreign body Staphylococcus epidermidis Skin or foreign body Organism Site of entry Pathogenesis
Meninges and Superficial Cerebral veins Galea aponeurotic Arachne it granulation Superior segal sInUs Pencrar ium rficial Epicural spa e puten:is Ours mater Arachnoid Subarachno d space Pla Eu armor cerebal Fatx cerebri midc le meningeal Superior sagittal Dura : rate srscrnojc Su:articial mi:ft
Brain with inflammatory exudate covering the cortical hemispheres in purulent meningitis
Brain with inflammatory exudate covering the cortical hemispheres in purulent meningitis