24 Questions
What is the characteristic feature of Clostridia?
They are anaerobic spore-forming Gram-positive bacilli
Which of the following Clostridia causes flaccid paralysis?
C. botulinum
What is the result of trauma to the region of infection in Actinomycosis?
Pathogenic proliferation of the organisms
What is the characteristic of the fluid in Actinomycosis diagnosis?
It has a granular texture
What is the treatment for Actinomycosis?
Penicillin
What is the characteristic of Actinomycetes?
They form filamentous branches
What is the characteristic of Lactobacillus that helps create an acidic environment in the vagina?
Ability to ferment glucose into lactic acid
What is the primary source of infection for Bacteroides, Prevotella, Fusobacterium, and Porphyromonas?
Endogenous source through mucosal damage
What is the characteristic of Bacteroides, Prevotella, Fusobacterium, and Porphyromonas that can aid in diagnosis?
Unique morphology of Gram negative anaerobic bacilli
What is the primary role of Lactobacillus in the human body?
Inhibiting growth of many bacterial species
What is the common presentation of infections caused by Bacteroides, Prevotella, Fusobacterium, and Porphyromonas?
Foul-smelling discharge and tissue necrosis
How should specimens be collected and transported for isolation of Bacteroides, Prevotella, Fusobacterium, and Porphyromonas?
Under strict anaerobic conditions
What is the characteristic shape of Treponema pallidum cells?
Slender, spiral filaments with regular coils
Why can Treponema pallidum not be seen by light microscopy?
Because of its high lipid content
How many Treponema pallidum organisms are required to produce infection?
Less than 10
What is the name of the lesions that occur in moist intertriginous areas during Secondary Syphilis?
Condylomata
How can Treponema pallidum be transmitted from mother to fetus?
Through the placenta
What is the characteristic dental feature of Congenital Syphilis?
Hutchinson teeth
What is the primary specimen used for direct smear examination in syphilis diagnosis?
Exudate from chancre
Which type of microscope is used to examine smears stained with fluorescein-labelled anti-treponemal antibodies?
Fluorescent microscope
What is the target of non-treponemal antigen tests in syphilis diagnosis?
Lipid antigens
Which test is used to detect specific antibodies directed against protein constituants of T. pallidum?
Fluorescent T. pallidum antibody absorption
What is the effect of treatment and recovery on non-treponemal antigen tests?
Becomes negative
What is the drug of choice in the treatment of syphilis?
Penicillin
Test your knowledge on anaerobic Gram-positive and negative bacilli, including Clostridia, which are spore-forming bacteria found in soil and normal intestinal flora. Learn about their role in disease pathogenesis and species identification. Also, explore Spirochetes, a type of bacteria with a unique spiral shape.
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