CLASSIFICATION OF INFECTIOUS ORGANISMS

BACTERIA AEROBIC   Gram-positive   Cocci      Streptococci: pneumococcus, viridans streptococci; group A streptococci   Enterococcus      Staphylococci: Staphylococcus aureus, Staphylococcus epidermidis   Rods (bacilli)   Corynebacterium   Listeria Gram-negative    Moraxella      Neisseria (Neisseria meningitides. Neisseria gonorrhoeae).   Rods (bacilli)      Enterobacteriaceae (Escherichia coli, Klebsiella, Enterobacter, Citrobacter, Proteus, Serratia, Salmonella, Shigella, Morganella, Providencia)   Campylobacter   Pseudomonas   Helicobacter   Haemophilus (coccobacilli morphology)   Legionella Anaerobic  Gram-positive   Cocci   Peptococcus   Peptostreptococcus   Rods (bacilli)      Clostridia (Clostridium perfringens, Clostridium tetani, Clostridium difficile)   Propionibacterium acnes

Gram-negative   Cocci     None   Rods (bacilli)      Bacteroides (Bacteroides fragilis, Bacteroides       melaninogenicus)      Fusobacterium      Prevotella 2. FUNGI    Aspergillus, Candida, Coccidioides, Cryptococcus, Histoplasma, Mucor, Tinea, Trichophyton 3. VIRUSES    Influenza, hepatitis A, B, C, D, E; human immunodeficiency virus; rubella; herpes; cytomegalovirus; respiratory syncytial virus; Epstein-Barr virus, severe acute respiratory syndrome (SARS) virus 4. CHLAMYDIAE Chlamydia trachomatis Chlamydia psittaci Chlamydia pneumoniae    Lymphogranuloma venereum (LGV) disease caused by Chlamydia trachomatis of immunotype L1–L3 5. RICKETTSIAE Rocky Mountain spotted fever, Q fever Ureaplasma 6. MYCOPLASMAS Mycoplasma pneumoniae, Mycoplasma hominis 7. SPIROCHETES Treponema pallidum, Borrelia burgdorferi (Lyme disease) 8. MYCOBACTERIA Mycobacterium tuberculosis Mycobacterium avium intracellulare