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17 Cards in this Set
- Front
- Back
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What are members of the Family Chlamydiaceae classified as and why?
What two forms do they live as? What is different about their cell walls from Gram negative bacteria? What are the two genera in this family? |
-Obligate intracellular parasites as they must live within another cell to replicate.
-Elementary body which is the extracellular form with a hardy, spore-like coat and retiuclate body which lives inside the host. -Non peptidoglycan -Chylamydia and Chlymydophila |
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What is the main species of Genera Chlamydia? Which ways may you contract biovars?
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-C. trachomatis
-Sexually contact, hand to eye or via vectors (eg flies) |
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What diseases does Chlamydia trachomatis cause?
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-Lymphogranuloma venereum (LGV):small genital papule, associated regional enlargened lymph nodes with abscesses.
Ocular trachoma:inflammation of conjuctiva and cornea, leading to damage of cornea and blindness. Genital tract infection:most common STI. Males-urethritis, epdidiymitis and prostatitis, females-urerthritis, cervicitis, endometritis and salpingitis, Inclusion conjuctivitis, Perinatal disease: Infants contract pneumonia when passing through infected canal |
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What are the two species of Genera Chlamydophila and how are they spread? What do they cause?
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-C. pneumoniae (respiratory route) and C. psittaci
(aerosol from infected birds) -C. pneumoniae: penumonia, bronchitis and upper respiratory tract infections C. psittaci: non-specific flu-like illness with fever, sore throat, lymph nodes, "typhoidal" form with fever malaise, pneumonia. |
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What is an important feature of the Genus Mycoplasma?
What are the six species which cause infection in humans? |
-Lack a cell wall
-M. pneumoniae, M. hominis, M. genitalium, M. penetrans, M. fermentans, Ureaplasma urealyticum (mycoplasma-like) |
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What does Mycoplasma penumoniae cause and in what population?
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Atypical pneumonia in young, healthy adults and upper respiratory tract infection without pneumonia.
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What are the differences between atypical and typical pneumonia?
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Typical has well demarcated lobar consolidation on X-ray (compared to patchy consolidation), bacterial cause can be seen on Gram stain and it responds to penicillin where as non of this is observed in atypical.
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What % of asymptomatic women have M. hominis in their vaginas? What may it cause?
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-10%
-Vaginosis (common cause of bacterial discharge), PID, postpartum and postabortal fever, low birth weight. |
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What is M. genitalium a major cause of? What else does it cause? What else is responsible for the same infection?
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-Non-gonococcal urethritis (NGU)
-PID -Chlamydia trachomatis |
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What does Ureaplasma urealyticum cause?
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-NGU, postpartum fever, spontaneous abortion, stillbirth, preterm labour, low birth weight.
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What is Mycoplasma penetrans a coloniser of and in what type of patients?
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-Genitourinary tract of AIDS patients.
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What is Mycoplama fermentans a coloniser of and in what type of patients? What may it cause?
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-Oropharynx and genitourinary tract of AIDS patients.
-Rapid progression of AIDS and pneumonia. |
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What are Anaerobic bacteria commensals of? What is a good definition of an Anaerobic bacteria?
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-Bowel, oropharynx, vagina and skin.
-Bacteria that will not grow on surface agar when supplemented with 10% CO2. |
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What Genus is an Anaerobic Gram positive cocci?
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-Peptostreptococcus
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What Genera are Anaerobic Gram negative rods?
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-Bacteroides, Porphyromonas, Prevotella, Fusobacterium
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What is the main species name of Bacteroides?
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B. fragilis
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What are some examples of infection with anaerobic bacteria?
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Brain abscess, dental infections, lung abscess, aspiration pneumonia, pleural empyema (collection of pus), pyogenic liver abscess. PID, human or animal bite infections, infected foot ulcers particularly in diabetes, myoncerosis.
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