Flashcards in USMLE Bacteria Deck (65):
Glycocalyx - use?
Adherence onto foreign surfaces, loosely organized polysaccharides
Microbes that don't stain well?
Treponema (too thin)
Mycobacteria (high lipid content in cell wall)
Mycoplasma (no cell wall)
"These Microbes May Lack Real Colour"
Trypanosomes (try my)
Obligate intracellular microbes
Really CHilly and COld
Facultative intracellular microbes
FRANCIS "NEISS"LY invited LISTER to the LEGION in YERSINIA for MY SALMON and BRUCELL sprouts
Some Nasty Bugs May Live FacultativeLY
yoUR SAPpy PRO boNO KLEB is an EPIc HPoCRYPT.
CHuck Norris hates PUNKSS
Haemophilus Influenza B
Strep (Group B)
Catalase positive organisms
Cat positively said "NO, PSEUDOwoodo, ASPER CANDIDlE LISTed a SERRATed STAPH
High neutrophil content with intracellular organisms. Microbe?
If everyone was vaccinated with recombinant HbsAg, what disease would be eliminated?
Delta agent infection
What diseases are caused by Staph A exotoxin?
Scalded skin syndrome
Toxic shock syndrome
Febrile maculopapular rash that starts on the face and spreads to the trunk and extremities with postauricular LAD points towards?
Rubella, caused by togavirus
What do you use to treat a C Diff infection?
Oral metronidazole, vancomycin, fidaxomicin
What do you use to prophylax vs C Diff?
What do you use to treat toxoplasmosis?
Pyrimethamine and sulfadiazine
Person returns from trip with many white spots on tanned skin...dx and pathologic agent?
Pityriasis versicolor from malassezia furfur
What predisposes a person to a cholera infection?
Achlorhydria (from, for e.g., omeprazole tx, b/c cholera is acid sensitive)
What does H.Flu need to grow in media?
Chocolate agar with NAD (V) and X (hematin)
Hx of viral esophagitis and pneumocystis pneumonia = ?
CNS infection in HIV patient is most likely caused by?
How do you dx a cryptococcus neoformans brain infection?
Positive latex agglutination of CSF
Headache, retro-orbital pain, high-grade fever, joint and muscle pains w/ epistaxis. Dx?
What has a similar transmission to dengue fever?
Spherules that contain endospores with fever, mild tachy, lung auscultation. Dx and region?
C. immitis in Arizona
The presence of ____ would prevent death from Diptheria infection?
IgG against circulating proteins
What virus replicates by generating several functional viral proteins from a single, large, virally coded precursor polypeptide?
What part of a RNA virus determines its ability to infect humans?
What is the main source of rabies in the USA?
Restlessness, agitation, dysphagia progressing to coma within weeks of exploring a bat cave = suspect?
What kind of vaccine is used for rabies?
Various inactivated rhabdovirus strains
Where is the primary bodily site for cryptococcus neoformans and where is it found?
Lungs; soil & pigeon droppings
Gram positive rod with tumbling motility at room temperature. Microbe?
Infection with what microbe results in the formation of cold agglutinins?
What is the major virulence factor for S. pneumo?
Ab against Polyribosyl-ribitol-phosphate (PRP) protects against what microbe?
H. influenzae type B
What prevents infection with oral inoculation with C. diff?
Intestinal biomass prevents overgrowth of C Diff.
What diseases do you think of from the Northeast USA?
Babesiosis, Lyme disease, both by Ixodes tick
Immunosuppressed patient with fever, chills, multiple skin patches with ulcerated appearance, and occasional necrotic center. Dx and microbe?
Ecthyma gangrenosum, pseudomonas
What is the essential pathogenic mechanism for Shigella?
Mucosal invasion (NOT SHIGA TOXIN)
What do you use to prevent perinatal transmission of HIV?
Viral enzyme inhibitor drug (zidovudine, (ZDV, AZT))
What is the cause of positive monospot with heterophile antibody-negative mononucleosis-like syndrome?
Sputum cultures grow budding yeast that form germ tubes at 37C. Dx?
What might you see after impetigo infection?
Glomerulonephritis (more common than rheumatic fever!)
What kind of vaccine is the vaccine for rubella?
In the MMR, live attenuated vaccine
What viruses are capable of genetic shifts through reassortment?
What is the most common cause of aseptic meningitis?
Enterovirus (fecal oral route transmission)
Patient from central/South America presents with achalasia. Suspect?
Spherule filled with endospores - suspect?
How do you prophylax vs M. avium?
CD4 count > 50 prophylaxis?
TMP-SMX vs pneumocystis pneumonia and toxoplasmosis
Azithro/clarithromycin vs M. avium complex
Prevention of postsurgical infxn due to S. aureus?
Exposure to meningococcal infection prophylaxis?
Ceftriaxone, ciprofloxacin, rifampin
Prophylaxis of strep pharyngitis in child with prior rheumatic fever?
Benzathine penicillin G
Hippurate test +?
GBS (S. agalactiae)
The only bacteria with a polypeptide capsule?
G+ that produces endotoxin?
All replication of DNA viruses are in the _____ except ____.
All replication of RNA viruses are in the ______ except ______.
Cytoplasm, retrovirus, influenza
Where does herpesvirus get its membrane?
Calf myalgias in surfers in tropics. Dx and source?
Leptospirosis, water w/ animal urine
What is the natural reservoir of Borrelia burgdorferi?
Broad based ataxia, Charcot joints, + Romberg sign, stroke w/out HTN