4/18/17 Oral Microbiology TEST #4 Flashcards
What is the most common organism that causes impetigo?
-Staph. aureus
Besides staph aureus what is another common organism that causes impetigo?
-Strep. pyogenes
What causes tonsillitis and pharyngitis in bacteria form?
-Group A beta hemolytic streptococci
Are tonsillitis and pharyngitis caused more by viruses or bacteria?
-Virus
What is a potential sequelae of strep throat?
- Scarlet Fever
- Rheumatic fever
What does scarlet fever look like in children?
-There tongue looks like a strawberry
What causes scarlet fever?
-Disseminated Group A beta-hemolytic streptococcal infection
What is the disseminated form of strep throat?
- Scarlet fever
- Rheumatic fever
What causes Diphtheria?
-Cornebacterium diphtheriae
What is the sole reservoir of Diphtheria?
-Humans
What does diphtheria affect first?
-Affects mucosal tissues first
What causes the tissue necrosis in diptheria?
-Lethal exotoxin produced by Cornebacterium
T/F Syphilis is a painful ulceration
- False
- Painless
What causes syphilis?
-Treponema pallidum
Primary syphilis is characterized by the ___ that develops at the site of inoculation.
-Chancre
Who is syphilis more common in?
- Men
- African Americans
What is scattered foci of granulomatous inflammation (intraoral lesions usually affect the palate or tongue) known as?
-Gumma
What causes Gonorrhea?
-Neisseria gonnorhoeae
What are the signs of gonorrhea?
-Purulent discharge
What type of stain do you used to identify Mycobacterium tuberculosis?
-Acid fast stain
What is a lymphadenopathy of the neck that usually results from mycobacterium “TB of the neck” known as?
-Scrofula
What is the most common cause of collapse of the bridge of the nose?
-Leprosy
What causes leprosy?
-Mycobacterium leprae
T/F Leprosy has a very low infectivity rate
True
