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Microbiology TCN

Excelsior College/The College Network

QuestionAnswer
Diptheria gram - positive
Pertussis gram - negative
TB gram - neither but acid-fast. (resembles gram-pos) Waxy envelope (hydrophobic)
TB description invasion of lungs, alveolar nodule formation, s/s: fever, night sweats, coughing, wasting.
TB tx triple antibx tx 6 mo to 2 years. Isoniazid used with 2 other antibx
TB over 1/3 of world infected with it
Diptheria caused by - and spread by - diphtherotoxin - aerosolized contaminated droplets
Pertussis caused by - and spread by - Bordetella pertussis (coccobacillus) - aerosolized contaminated droplets
Streptococcal diseases gram - positive
Streptoccal diseases description generally have C carbohydrate layer in cell envelope to which humans produce antibodies, but they don't protect. But they help with diagnosis.
Streptoccal diseases reactions hemolytic reaction of bacteria on blood agar. B-hemolytic: completely clear zone (the hemolysin enzymes completely lyse the RBCs. opaque deep red)Pathogenic. A-hemolysis and Y-hemolysis are not harmful.
Diff between 1)streptocci and 2)staphylococci 1) does not secrete catalase 2) does secrete catalase
Strep infection sites throat, oral cavity, vagina, intestines
Acute pharyngitis Group __ strep. __-hemolytic. A. B-hemolytic.
Acute pharyngitis caused by Group "A" strep: Streptococcus pyogenes.
Acute pharyngitis description Strep throat. C-carbohydrate type. Pyogenic.
"A" Streptococcus pyogenes cell layers From inside: cytoplasmic membrane, peptidoglycan cell wall, C carbohydrate, M protein, Capsule of hyaluronic acid (makes slippery)
M protein of "A" strep bacteria is antiphagocytic
"A" strep bacteria hyaluronic acid is similar to __ a polysaccharide found in human connective tissue, so considered self by immune system.
"A" strep causes damage to heart and WBCs. also causes rash of scarlet fever
S. pyogenes causes what? scarlet fever, heart, WBC damage, impetigo, necrotizing fasciitis (the "Flesh-eating bacteria" of the lay press) and sequelae of Rheumatic fever and glomerulonephritis kidney damage
Group B-strep, caused by S agalactiae
S agalactiae description B-hemolytic, C carbohydrate,
S agalactiae mainly dangerous to newborns (septicemia, meningitis)
S agalactiae assay rectovaginal swab specimen of pregnant women
Group B streptocci confirmed through CAMP test
Viridans Strep only harmful to people with heart damage (rheumatic fever etc)
Pneumonia a condition of the lungs
Pneumonia caused by 1 or more bacteria, viruses, parasites, fungi, or physical particulates such as those found in tobacco smoke
Pneumonia description Alveoli damaged or filled with foreign matter, so the patient loses ability to transport oxygen into the bloodstream and remove carbon dioxide.
Streptococcus pneumoniae test Quellung test
Streptococcus pneumoniae gram - positive
S. pneumoniae vaccine Pneumovax
S. pneumoniae causes pneumonia, subacute endocarditis, otitis media, meningitis
Walking Pneumoia caused by Mycoplasma pneumoniae
M pneumoniae is gram negative
Created by: 1623703319
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