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Unformatted text preview: Microbiology 31 Lecture 10 Microorganism Diseases of the Respiratory, Digestive and Urogental Systems Respiratory System Upper respiratory tract Nose, pharynx (middle ears, auditory tubes) Lower respiratory tract Trachea, bronchi, lungs (bronchioles and alveoli) Normal microbiota in the upper respiratory tract May include pathogenic organisms i.e. S. pyogenes No normal microbiota in the lower respiratory tract Normally sterile Bacterial Diseases of the Respiratory System Pharyngitis, laryngitis, sinusitis, tonsillitis Caused by many types of bacteria and viruses Streptococcal pharyngitis (Strep throat) Caused by S. pyogenes (Group A beta streptococci) Transmitted by oral secretions Results in sore throat May manifest into more severe conditions Scarlett fever, glomerulonephritis Inflammation of the glomeruli (filters of kidney) Diptheria Caused by Corynebacterium diptheriae (GPB) Transmitted by airborne secretions Potent toxin results in sore throat, ulcerations, heart and kidney involvement, possibly death Vaccinations are effective (D in the DPT) Otitis media Earache caused by many types of bacteria Often result of complications of nose and/or throat infections Streptococcus pneumoniae is a common cause Pertussis (Whooping Cough) Caused by Bordatella pertussis (BNG) Transmitted by oral secretions Results in severe cough (possible brain damage and death in infants) Vaccinations effective (P in the DPT) Tuberculosis Caused by Mycobacterium tuberculosis (AFB) Transmitted by inhalation into the lungs (aerosol) Results in lesions on the lung, cardiovascular involvement Pneumonia Typically caused by: Streptococcus pneumoniae (GPC) Capsule inhibits phagocytosis and adds volume to the bacteria Haemophilus influenzae (GNCB) Atypically caused by many types of bacteria Klebsiella pneumoniae Escherichia coli Pseudomonas aeruginosa Transmitted by respiratory secretions Results in fluid filled lungs *also bacterial bronchitis Viral Diseases of the Respiratory System Common cold Caused by many types of viruses (especially rhinoviruses) Transmitted by indirect contact Results in fever, congestion, headache Respiratory Syncytial Virus Caused by RSV Transmitted by oral secretions...
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This note was uploaded on 05/11/2011 for the course BIO 31 taught by Professor Silva during the Spring '11 term at Reedley.
- Spring '11