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MICRO review
Question | Answer |
---|---|
unique to the fungi | Ergosterol |
most common flora organism on the skin | S. epidermidis |
protect bacteria against phagocytosis | protein A, capsules, and some pili |
pathogenicity factor produced by all gram-negative prokaryotes | Lipid A is the toxic component of endotoxin or lipopolysaccharide, which makes up the outer membrane |
possessed by all gram-positives | Teichoic acid |
Endospores are produced by two genera of gram-positive bacteria, | Clostridium and Bacillus |
Peptidoglycan is found in the cell wall of all prokaryotes except | Mycoplasma; contains sterols |
Painless, indurated genital ulcers during primary syphilis caused by | Treponema pallidum |
Used to visualize treponemes in fluid from chancre | Dark-field microscopy |
Serologic testing for Treponema pallidum NON-SPECIFIC | VDRL/RPR |
CONFIRM diagnosis of syphilis with SPECIFIC test | FTA-ABS |
Diagnose 3ยบ syphilis; neurosyphilis | test spinal fluid with VDRL or RPR |
most important test to distinguish between the gram-positive cocci of the genera Streptococcus and Staphylococcus. | catalase test |
is used to distinguish between Streptococcus pyogenes and S. agalactiae | CAMP test |
is used to identify Staphylococcus aureus specifically | Coagulase test |
A maculopapular rash begins on the ankles and wrists and spreads to his trunk | Rocky Mountain spotted fever, which is caused by Rickettsia rickettsii |
intracellular pathogen because it cannot make enough ATP for independent existence. | Rickettsia rickettsii |
only prokaryotes that possess sterols in their membranes | Mycoplasma and Ureaplasma |
lack muramic acid in their cell walls | Chlamydia |
specific test for the diagnosis of syphilis | fluorescent treponemal antibody-absorption test (FTA-ABS) |
N. gonorrhoeae and N. meningitidis are distinguished from one another by the fact | N. meningitidis ferments maltose and has a capsule |
Atypical pneumonia | Mycoplasma, Legionella, Chlamydia |
Atypical pneumonia in an elderly | Mycoplasma |
struvite stones or staghorn renal calcul, possible following UTI by organisms that are urease producers, change urinary pH | Proteus spp. or Ureaplasma urealyticum. |
Organisms that DONT Gram stain well | Treponema, Mycobacteria, Mycoplasma, Legionella, Rickettsia, Chlamydia |
high lipid content in cell wall detected by carbolfuchsin in acid-fast stain (Ziehl-Neelsen) | Nocardia, Mycobacterium |
Mycobacterium tuberculosis pathogenicity | Cord factor+ sulfatides= inhibit phagosome-lysosome fusion |
more common bacterial cause of diarrhea in the United States | Campylobacter jejuni |
All DNA viruses replicate in the nucleus EXCEPT | Poxvirus |
All RNA viruses replicate in the cytoplasm EXCEPT | Influenza, Retrovirus |
Only viruses insensitive to alcohol | naked capsid |
Interferon-alpha has been used with success in the treatment of these diseases | Hairy B cell leukemia, chronic hepatitis B and C, Kaposi sarcoma, condyloma acuminatum, renal cell carcinoma, malignant melanoma |
Interferon-beta has been shown to increase the length of remissions | Multiple sclerosis |
Interferon-gamma has been used to increase phagocytic cell function in | Chronic granulomatous disease |
How do retroviruses make their messenger RNA | By transcription from proviral DNA |
This is the only family of single-stranded DNA viruses. | Parvovirus |
Host is one in which the virus is not able to produce virions, but instead malignant transformation occurs | Nonpermissive |
Host permits viral replication and either lives or dies as a result of the number of cells killed. | Permissive |
only family of viruses that captures their envelope from the nuclear membrane of the infected cell. | Herpesviruses |
Most of the members of the family virus are agents of aseptic meningitis. | Picornaviridae (poliovirus, enterovirus, coxsackie virus) |
molecule that binds to CD4 and gives the HIV virus its tropism | gp120 |
gp41 | fusion and entry |
gag (p24) | capsid protein |