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Microbiology - Step 1
Microbology USMLE Step 1
176
Medical
Graduate
01/27/2011

Additional Medical Flashcards

 


 

Cards

Term
Silver stain
Definition
Legionella Pneumophila
Term
Chocolate agar
Definition
Hflu (includes factor V, NAD+ and factor X, hematin)
Term
Charcoal yeast culture (iron and cysteine)
Definition
Legionella
Term
H2S producing
Definition
Salmonella
Term
HPylori cocktail
Definition
1. metronidazole, bismuth, tetracyclin OR amoxicillin
2. metronidazole, omeprazole, clarithromycin
Term
question mark shaped
Definition
leptospira interrogans
Term
VDRL positive NOT syphilis
Definition
treponema pertenue - causes yaws
Term
Unpasteurized milk
Definition
brucella
Term
Cat scratch fever
Definition
bartonella
Term
rabbits! (also deer)
Definition
francisella tularensis (tularemia)
Term
prairie dogs
Definition
the plague - yersinia pestis
Term
dog, cat bites
Definition
pasteurella multocida
Term
BV
Definition
gardnerella vaginalis
Term
Need CoA and NAD
Definition
Rickettsiae - treat with tetracyclins
Term
Weil-Felix reaction
Definition
serum from pts with rickettsial infection will react with proteus antigens and agglutinate (except coxiella or Q fever)
Term
tumbling motility (microbe)
Definition
lysteria monocytogenes
Term
brain cyst (microbe)
Definition
taenia solium (cysticercosis)
Term
Liver cyst (microbe)
Definition
echinococcus granulosus
Term

SCC of bladder (microbe)

treatment?

Definition

schistosoma haematobium

 

praziquantel

Term

[image]

owl's eye cell

Definition

CMV-infected cell

 

 

Term
Cowdry-A Inclusion
Definition

 


HSV infected Cell

 

[image]

Term

[image]

 

Councilman Bodies

Definition

Yellow Fever or viral hepatitis - inclusion body seen in liver

[image][image]

Term
Surface F Protein
Definition

Paramyxoviruses 

(Parainfluenza, Rubeola, RSV, Mumps)

Mediates cell entry

targeted by pavilizumab

Term

 

[image]

 

Definition

Negri Bodies

 

Rabies infected neurons

Term

 

[image]

Sulfur granules + Branching rods from oral sample

Definition
Actinomyces Israelli
Term
Dog/cat bite
Definition
pasteurella multocida
Term
currant jelly sputum
Definition
klebsiella
Term
+ PAS
Definition
Whipple's Disease - Tropheryma whippelii
Term
fungal infection in pt with DM
Definition
mucor or rhizopus
Term
Eaton's Agar
Definition
Mycoplasma pneumoniae
Term
High titer of IgM (cold agglutinins)
Definition
Mycoplasma pneumoniae
Term
Mississippi and Ohio River valleys
Definition
Histoplasmosis
Term
Bird and bat droppings
Definition
Histoplasmosis
Term
Dx by KOH of sputum
Definition
Blastomycosis
Term
American southwest
Definition
coccidioidomycosis
Term
budding yeast w/ captain's wheel appearance (circle with spokes coming out)
Definition
paracoccidioidomycosis
Term
tinea versicolor
Definition
malassezia furfur
Term
spaghetti and meatball on KOH
Definition
malassezia furfur
Term
Sabouraud's agar
Definition
crypococcus neoformans
Term
brain "soap bubble" lesion
Definition
crypococcus neoformans
Term
non-septate hyphae w/ wide angles
Definition
mucor/rhizopus
Term
methenamine silver stain
Definition
Pneumocystis jiroveci (PCP)
Stain lung tissue
Term
ascending lymphangitis
Definition
sporothrix schenckii
Term
Neonate w/ chorioretinitis, intracranial calcifications, hydrocephalus
Definition
toxo
Term
rapid meningoencephalitis post swim in fresh water?
Definition
Naelgleria fowleri
Term
Tsetse fly (ouch!)
Definition
trypanosoma gambiense or rhodesiense - sleeping sickness
Term
Treatment - trypanosoma gambiense or rhodesiense
Definition
suramin, melarsoprol (if CNS penetration needed)
Term
Chagas
Definition
Trypanosoma cruzi
Term
Treatment - chagas
Definition
Nifurtimox
Term
Treatment - Leishmania donovani
Definition
sodium stibogluconate
Term
Treatment - Plasmodium vivax/ovale
Definition
choloroquine plus primaquine for dormant liver bugs
Term
Treatment - babesia
Definition
quinine, clinda
Term
treatment - enterobius vermicularis
Definition
bendazoles or pyrantel pamoate
Term
treatment - ascaris lumbricoides
Definition
bendazoles or pyrantel pamoate
Term
Undercooked pork
Definition
trichinella
Term
treatment - trichinella
Definition
bendazoles
Term
treatment - strongyloides stercoralis
Definition
bendazoles or ivermectin
Term
River blindness
Definition
onchocerca volvulus
Term
Treatment - river blindness
Definition
Ivermectin
Term
Hookworms - treatment
Definition
mebendazole (bendazoles) or pyrantel palmoate
Term
treatment - dracuculus medinensis
Definition
Niridazole
Term
Treatment - Loa Loa
Definition
diethylcarbamazine
Term
Elephantiasis - infectious agent and treatment
Definition
wuchereria bancrofti, diethycarbamazine
Term
Treatment - toxocara canis
Definition
diethylcarbamazine
Term
tape worm - treatment
Definition
taenia solium, praziquantel (bendazoles for neurocysticercosis)
Term
Ate freshwater fish, now anemic from B12 deficiency? Treatment?
Definition
Diphyllobothrium latum, praziquantel
Term

Liver cyst - surgeon injects ethanol before removal

treatment?

Definition

echinococcus granulosus

 

bendazoles

Term

gallstones after eating undercooked fish?

Treatment?

Definition

clonorchis sinensis

 

praziquantel

Term

Hemoptysis after eating crab?

Treatment?

Definition

Paragonimus westermani

Praziquantel

Term
infectious agent causing microcytic anemia?
Definition
hookworm (ancylostoma duodenale, necator americanus) via sucking blood from intestinal walls
Term
Live vaccine given to HIV+ patients
Definition
MMR
Term
DNA enveloped viruses
Definition
Herpes (HSV 1&2, EBV, CMV, VZV), HBV, smallpox
Term
Single strand DNA virus
Definition
parvovirus
Term
Double strand RNA virus
Definition
reoviruses (rotavirus, reovirus - colorado tick fever)
Term
DNA nuclocapsid viruses
Definition
Adenovirus, papilomaviruses, parvovirus
Term
RNA enveloped viruses (10)
Definition
Influenza, parainfluenza, RSV, measles, mumps, rubella, rabies, HTLV, HIV, HCV
Term
RNA nucleocapsid viruses
Definition
enteroviruses (polio, coxsackie, echovirus, HAV, HEV), rhinovirus, reovirus (rotavirus)
Term
infectious agent seen within neutrophils
Definition
gonorrhea
Term
cellulitis post ocean (or lake) swim?
Definition
aeromonas and vibrio vulnificans
Term
RPR
Definition
serum mixed with cardiolipin, cholesterol and lecithin. Test for spirochet antibodies
Term
oxidase + organisms
Definition
Pseudomonas, vibrio cholera, campylobacter
Term
osteomyelitis in patient with sickle cell anemia?
Definition
Salmonella
Term
[image]
Definition
Giardia
Term
[image]
Definition
Entamoeba histolytica
Term
[image]
Definition
Cryptosporidium
Term
[image]
Definition
Toxoplasma gondii
Term
[image]
Definition
Naegleria fowleri
Term
[image]
Definition
trypanosoma cruzi
Term
[image]
Definition
Leishmania donovani
Term
[image][image]
Definition
Babesia (left - ring form, right - maltese cross)
Term
[image]
Definition
Trichomonas Vaginalis
Term
[image]
Definition
Candida
Term
[image]
Definition
Aspergillus
Term
[image]
Definition
Cryptococcus
Term
[image]
Definition
Blastomycosis
Term
[image]
Definition
Histoplasmosis
Term
Portal hypertension
Definition
schistosoma mansoni
Term
sandfly
Definition
leishmaniasis
Term
envelope from nuclear membrane
Definition
Herpes viruses (HSV 1&2, EBV, CMV, VZV, Roseola, HHV8)
Term
Aedes fly
Definition
Yellow fever
Term
Influenza antigens
Definition
hemagglutinin (viral entry)
neuraminidase (progeny virion release)
Term
UTI assoc with struvite stones
Definition
proteus
Term
Rash head -> toes, postauricular lymphadenopathy
Definition
Rubella
Term
angiomatosis in immunocompromised individuals - confused with karposi sarcoma
Definition
Bartonella
Term
Acid fast cysts in stool
Definition
cryptosporidium
Term
Catalase +
Definition
staph (aureus, saprophyticus, epidermidis), nocardia, serratia, pseudomonas cepacia, Aspergillus
Term
Inhibit peptidoglycan cross-linkin
Definition
penicillin, ampicillin, ticarcillin, pipercillin, imipenem, aztroenam, cephalosporins
Term
Inhibit peptidoglycan synthesis
Definition
bacitracin, vancomycin
Term
inhibits 50S peptidyltransferase
Definition
cholamphenicol
Term
inhibit initiation complex formation (30S)
Definition
aminoglycosides
Term
bind 50S blocking translocation
Definition
macrolides (erythromycin), clindamycin, lincomycin
Term
Inhibits DNA gyrase
Definition
flouroquinolones
Term
Block protein synth at 30S ribosomal subunit
Definition
tetracyclines
Term
Block mRNA polymerase
Definition
Rifampin
Term
Block nucleotide synthesis
Definition
Sulfonamides, trimethoprim (SMX-TMP)
Term
Bacteriostatic antibiotics
Definition
Erythromycin, clindamycin, SMX, TMP, tetracyclins, chloramphenicol
Term
Bactericidal
Definition
vancomycin, fluoroquinolones, penicillin, aminoglycosides, cephalosporins, metronidazole
Term
Sensitive to ampicilling/amoxicillin
Definition
Hflu, Ecoli, listeria, proteus, salmonella, enterocci
Term
Aztreonam
Definition
inhibits cell wall synth, resistent to beta-lactamases
treats gram negative rods
no cross allergenicity with penicillins
Term
Pt needs imipenem, what else do you give?
Definition
Cilastatin (decrease inactivation of renal tubules by inhibiting renal dihydropeptidase I)
Term
mechanism of resistance to Vanc?
Definition
via amino acid change of D-ala D-ala to D-ala D-lac.
Term
Vancomycin mechanism
Definition
inhibit cell wall mucopeptide formation by binding to D-ala D-ala of cell wall precursers
Term
Linezolid mechanism
Definition
block 50S ribosome
Term
Antibiotic, requiring O2 for uptake
Definition
aminoglycosides
Term
Ototox with loop diaretics
Definition
aminoglycosides
Term
nephrotox with aminoglycosides
Definition
cephalosporins
Term
Tetracylines - dietary restrictions
Definition
milk, iron-containing products, antiacids (divalent cations inhibit gut absorption)
Term
Bind to 23S rRNA
Definition
macrolides
Term
Prolongued QT
Definition
macrolides (esp erythromycin)
Term
gray baby syndrome
Definition
cholamphenicol (due to lack of UDP-glucuronyl transferase)
Term
Antibiotic with side effect of aplastic anemia
Definition
chloramphenicol
Term
sulfonamide mechanism
Definition
PABA antimetabolites inhibit dihydropteroate synthetase (ie formation of tetrahydrofolic acid needed for thymine, purine and methionine, glycine and tRNA synth)
Term
Trimethoprim mechanism
Definition
Inhibits dihydrofolate reductase (inhibits THF- tetrahydro folic acid - formation)
Term
displaces warfarin from albumin
Definition
sulfonamides
Term
side effect - granulocytopenia and leukopenia
Definition
trimethoprim
Term
produces orange body fluids
Definition
rifampin
Term
prevent neurotox with isoniazid
Definition
B6
Term
Drug causing optic neuropathy
Definition
Ethambutol (anti-TB)
Term
Isoniazid mechanism
Definition
decreased synthesis of mycolic acids
Term
Tetracycline resistance mechanism
Definition
increased transport out or decreased uptake
Term
MRSA resistance mechanism
Definition
altered PBP
Term
Aminoglycoside resistance
Definition
acetylation, adenylation or phosphorylation
Term
chloramphenicol resistance mechanism
Definition
acetylation
Term
Macrolide resistance mechanism
Definition
methylation of rRNA near ribosome binding site
Term
fluoroquinolones resistance mechanism
Definition
altered gyrase or reduced uptake
Term
sulfonamide resistance mechanism
Definition
altered enzyme (dihyropteroate synthetase), decreased uptake or increased PABA synthesis
Term
griseofulvin mechanism
Definition
microtubules dysruption
Term
azoles mechanism
Definition
lanosterol to ergosterol inhibition
Term
terbinafine mechanism
Definition
squalene to lanosterol inhibition
Term
amphotericin and nystatin mechanism
Definition
pore formation, disrupting membrane
Term
antifungal that crosses blood-brain barrier
Definition
fluconazole
Term
tellurite agar
Definition
diphtheria
Term
Torch infections - rubella
Definition
PDA (or pulmonary artery hypoplasia), cataracts, deafness, blueberry muffin rash, microcephaly/MR
Term
latex particle agglutination test
Definition
cryptococcus
Term
cryptococcus treatment in HIV+ patients
Definition
amphotericin B and flucytosine
Term
gram negative sepsis
Definition
Lipid A

Induces shock by macrophage and granulocyte activation
Term
Organisms that use pili
Definition
uropathogenic or enteropathogenic Ecoli, cholera, pertussis, neisseria meningitidis
Term
mucicarmine stain
Definition
cryptococcus, stains polysaccaride capsule
Term
Make dextrans from glucose
Definition
viridans streptococci
Term
chronic abscess after dental trauma
Definition
actinomyces
Term
choroid plexus invasion
Definition
N. meningitidis, gateway to CSN invasion
Term
Waterhouse-Friedrich syndrome
Definition
bilateral adrenal cortex hemorrhage causes adrenal insufficiency, hypotension, death
Term
Hflu spread
Definition
pharynges-lymphatics-meninges
Term
Guillain Barre after diarrheal illness
Definition
Campylobacter Jejuni
Term
Bacteria that produce hyaluronidase
Definition
Group A Streptococci, C. Difficile, staph
Term
cord factor
Definition
mycoside found in TB, causes to grow "serpentine" on culture
Virulence factor that inactivates neutrophils, damages mitochondria and induces TNF release
Term
Pts serum agglutinates sheep erythocytes, indicating presence of heterophil antibodies
Definition
positive monospot test pt has mono (EBV)
Term
protein A
Definition
staph - impair complement mediated cell lysis. Binds to Fc portion of IgG more than bacterial surface antigen
Term
Increase intracellular survival by inhibition of phagosome-lysosome fusion
Definition
TB, M.laprae, legionella, ehrlichia
Term
opsonization impairment mechanism of bacteria
Definition
capsule formation - poorly immunogenic polysaccarides.
S. Pneumo, N. meningitidis, H. flu, Crypto
Term
IgA protease
Definition
cleaves IgA dimers, inhibiting mucus membrane immunity
N. gonorrhoeae, N. Meningitidis
Term
K1 Capsular antigen
Definition
capsule on Ecoli seen in neonatal meningitis.
Inhibits complement and phagocytosis
Term
intracellular polyphosphate granules
Definition
diptheria, seen w/ methylene blue staining
Term
Ring-enhancing lesions in HIV patient
Treatment?
Definition
Toxo
treat - pyrimethamine and sulfadiazine
Term
skin layer break allowing for infection
Definition
stratum corneum
Term
congenital toxo
Definition
hydrocephalus, intracanial calcifications, chorioretinitis
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