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Clinical or Microbiologic Category Species Frequent Disease PresentationsInfections by pyogenic cocci Staphylococcus aureus, S. epidermidis Abscess, cellulitis, pneumonia, septicemia Streptococcus pyogenes, b-hemolytic Upper respiratory tract infection, erysipelas, scarlet fever, septicemia Streptococcus pneumoniae (pneumoccoccus) Lobar pneumonia, meningitis Neisseria meningitidis (meningococcus) Cerebrospinal meningitis Neisseria gonorrhoeae (gonococcus) Gonorrhea Gram-negative infections, common * Escherichia coli Urinary tract infection, wound infection, abscess, pneumonia, septicemia, endotoxemia, endocarditis * Klebsiella pneumoniae * Enterobacter (Aerobacter) aerogenes * Proteus spp. (P. mirabilis, P. morgagni) * Serratia marcescens * Pseudomonas spp. (P. aeruginosa) Bacteroides spp. (B. fragilis) Anaerobic infection Legionella spp. (L. pneumophila) Legionnaires disease Contagious childhood bacterial diseases Haemophilus influenzae Meningitis, upper and lower respiratory tract infections Bordetella pertussis Whooping cough Corynebacterium diphtheriae Diphtheria Enteropathic infections Enteropathogenic E. coli Invasive or noninvasive gastroenterocolitis, some with septicemia Shigella spp. Vibrio cholerae Campylobacter fetus, C. jejuni Yersinia enterocolitica Salmonella spp. (1000 strains) Salmonella typhi Typhoid fever Clostridial infections Clostridium tetani Tetanus (lockjaw) Clostridium botulinum Botulism (paralytic food poisoning) Clostridium perfringens, C. septicum Gas gangrene, necrotizing cellulitis * Clostridium difficile Pseudomembranous colitis Zoonotic bacterial infections Bacillus anthracis Anthrax (malignant pustule) * Listeria monocytogenes Listeria meningitis, listeriosis Yersinia pestis Bubonic plague Francisella tularensis Tularemia Brucella melitensis, B. suis, B. abortus Brucellosis (undulant fever) Burkholderia mallei, B. pseudomallei Glanders, melioidosis Leptospira spp. (many groups) Leptospirosis, Weil disease Borrelia recurrentis Relapsing fever Borrelia burgdorferi Lyme borreliosis Bartonella henselae Cat-scratch disease; bacillary angiomatosis Spirillum minus, Streptobacillus moniliformis Rat-bite fever Human treponemal infections Treponema pallidum Venereal, endemic syphilis (bejel) Treponema pertenue Yaws (frambesia) Treponema carateum (T. herrejoni) Pinta (carate, mal del pinto) Mycobacterial infections * Mycobacterium tuberculosis, M. bovis (Koch bacillus) Tuberculosis M. leprae (Hansen bacillus) Leprosy * M. kansasii, M. avium, M. intracellulare Atypical mycobacterial infections M. ulcerans Buruli ulcer Actinomycetaceae * Nocardia asteroides Nocardiosis Actinomyces israelii Actinomycosis *Important opportunistic infections. include Staphylococcus epidermidis and Propionibacterium acnes, the cause of acne. Aerobic and anaerobic bacteria in the mouth, particularly Streptococcus mutans, contribute to dental plaque, a major cause of tooth decay. In the colon, 99.9% of bacteria are anaerobic, including Bacteroides species. Many bacteria remain extracellular when they invade the body, while others can survive and replicate either outside or inside of host cells (facultative intracellular bacteria) and some grow only inside host cells (obligate intracellular bacteria). Date: 2016-04-22; view: 1252
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