BIO230 Atypical Bacteria

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Author:
jswareham
ID:
70941
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BIO230 Atypical Bacteria
Updated:
2011-03-05 21:04:01
Tags:
Atypical bacteria mycoplasma Rickettsia chlamydia
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Description:
CCBC BIO230 Dr. Jeffrey Test 1 material. Covers atypical bacteria.
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  1. Atypical Bacteria

    3 geneses of atypical bacteria?
    • Mycoplasma
    • Rickettsia
    • Chlamydia
  2. Atypical Bacteria; Mycoplasma

    1. Size
    2. PG in cell wall
    3. Shape
    4. Grow on agar
    5. Treated with
    • 1. Smaller than most bacteria - 0.15μm
    • 2. No peptidoglycan in cell walls
    • 3. No rigid shape (not a coccus, bacillus, or spiral), they are pleomorphic
    • 4. They are the smallest known microorganism to grow on agar to form colonies, but it takes 7-10 days to form visible colonies
    • 5. Usually treated with tetracycline & doxycycline
  3. Atypical Bacteria; Mycoplasma

    Infections caused by Mycoplasma?
    • -Mostly in immunosuppressed individuals
    • -Leading cause of pneumonia in hospital patients (nosocomial infection)
    • -Also causes endocarditis in hospital patients
  4. Atypical Bacteria; Rickettsia

    1. Size
    2. PG in cell wall
    3. Shape
    4. Grow on agar
    5. Vector organism
    6. Treated with
    • 1. Smaller than most bacteria - 0.5μm
    • 2. Very little peptidoglycan in cell wall
    • 3. Coccobacillus shaped
    • 4. Obligate intracellular parasite, Must grow in living cells, Will not grow on agar plates.(Prefers to grow inside cells lining blood vessels - can cause vessel damage )
    • 5. Are usually transmitted from animal to humans by ticks & lice (blood feeders)
    • 6. tetracycline
  5. Atypical Bacteria; Rickettsia

    Infections caused by Rickettsia?
    • -Rocky Mountain Spotted Fever (RMSF)
    • 1. causes blood vessel damage
    • 2. very high fevers, 108oF, causing delirium, brain damage, kidney failure, paralysis

    -Typhus; carried by body lice, similar to RMSF
  6. Atypical Bacteria; Chlamydia

    1. Size
    2. PG in cell wall
    3. Shape
    4. Grow on agar
    5. Treated with
    • 1. Smaller than most bacterial - 0.3μm
    • 2. Very little peptidoglycan in cell wall
    • 3. Can appear coccus-like or bacillus-like
    • a. Elementary body = coccus-like
    • b. Reticulate body = bacillus-like
    • c. A single Chlamydia will morph into both shapes.
    • 4. They are obligate intracellular parasites.
    • a. Prefer cells of mucous membranes
    • b. Will not grow on agar plates
    • 5. Treat with tetracycline.
  7. Atypical Bacteria; Chlamydia

    4 infections caused by Chlamydia?
    • Psittacosis
    • Trachoma
    • Lymphogranuloma Venereum (LGV)
    • Genito-urinary Chlamydia Infection
  8. Atypical Bacteria; Chlamydia; Infections

    Characteristics of Psittacossis infection?
    • 1. Type of ornithosis, an infection of birds, also called "parrot fever"
    • 2. Causes pneumonia & death of tropical birds
    • 3. Can be transmitted to humans from birds through secretions or droppings
    • 4. Humans get chronic asthma-like respiratory illness, cough, fever, fatigue, pneumonia
    • 5. Treated with tetracycline
  9. Atypical Bacteria; Chlamydia; Infections

    Characteristics of Trachoma infection?
    • 1. Type of conjunctivitis
    • 2. World's leading cause of blindness (40 million cases at any given time)
    • 3. Found in animal and human urine & feces > Ends up in water supply
    • 4. Water with Trachoma infects eyes
    • 5. Treated with tetracycline
  10. Atypical Bacteria; Chlamydia; Infections

    Characteristics of Lymphogranuloma Venereum (LGV) infection?
    • 1. It is an STD
    • 2. Infects the lymph nodes of groin
    • 3. Causes hard, bleeding swollen lumps, granules
    • 4. It looks like syphilis, but is called "black syphilis" because of bleeding
    • 5. Treated with tetracycline
  11. Atypical Bacteria; Chlamydia; Infections

    Characteristics of Genito-urinary Chlamydia infection?
    • 1. It is an STD
    • 2. In females causes PID, cervicitis, sterility
    • 3. In males causes Urethritis, prostatitis, testicle infections, sterility
    • 4. Treated with tetracycline

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