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115 Cards in this Set

  • Front
  • Back
Sugar backgone w/ cross linked peptide side chains. Gives bacteria a rigid suport, protects against osmotic pressure
peptidoglycan
G+ major surface antigen with Peptidoglycan for support.
Cell wall/ membrane
Lipoteichoic acid in G+ cell wall induces--
IL1 and TNF
Site of endotoxin in G-
Outer membrane, lipolysaccharide
Lipid A in Outer membranes of G- induce
TNF alpha and IL1
Site of oxidative and transport mechanisms in bacteria
plasma membrane
Site of protein synthesis
Ribosome
Contains beta-lactamases
Periplasm
Space between the cytoplasmic membraen and peptidoglycan wall in G- bacteria
Periplasm
Protects against phagocytosis
Capsule
Quelling reaction
test for capsule, if capsule is pressent the anticapsular sera will swell the capsuled bacteria
Mediates adherance to bacteria to cell surface
Pilus/ Fimbrae (glycoptn)
Forms attachment between 2 bac during conjugation
Sex pilli (glycoptn)
Motility of the bacteria
flagellum
Provide resistance to dehydration, heat and chemicals via a keratin like coat with dipicolinic acid
Spore
Contains genes for antibiotic resistance, enzymes and toxins
Plasmid (DNA separate from rest)
Mediate adherance to surfaces, esp foreign surfaces
Glycocalyx
Thick peptidoglycan layer, Lipoteichoic acid
G+
Thin peptidoglycan layer, outer membrane with endotoxin/ LPS
G-
6 "bugs" that dont stain well
Treponema (too thin), Rickettsia Chalymydia and legionella (intracellular), Mycobacteria (High lipid content in cell wall req acid fast), Mycoplasma (no cell wall)
Organisms requiring Giemsa stain
Borrelia, Plasmodium, trypanosomes, chylamydia
Organisms requiring PAS (periodic acid schiff) stain
Whipple Dx (stains glycogen, mucopolysaccharids)
Ziehl Neelsen (Carbol fuschin)
Acid fast organisms (mycobacterium)
India ink or mucimarine
Cryptococcus neoformans
Silver stain
Fungi
4 obligate aerobes
Norcardia, pseudomonas, mycobacterium TB, bacillus

"Nagging Pests Must Breath"
3 obligate anaerobes
Clostridium, Bacteroides, Actinomyces

"Anaerobes Can't Breath Air"
antibiotic resistant to anaerobes
aminoglycosides
2 antibiotics effective towards anaerobes
Metronidazole and Clindamycin
6 encapsulated bacteria
Strep pneumo, H influ, N. meningit, Salm, Klebsla, GBS

"Some Killers have nice shiny bodies"
5 catalase positive bugs
S. aureus, Serratia, Pseudomonas, Candida, E coli
Urease positive organisms
Proteus, Ureaplasma, Nocardia, Cryptococcus, Hyplori, Klebsiella

(PUNCH-K)
Protein A
Staph Aureus
Binds Fe of Ig, prevents opsoniz and phagocytosis
IgA protease
cleaves IgA
S. pneumo, Hib, Neisseria
M protein
Group A streptococcus
Helps prevent phagocytosis
Toxins that inactivates elongation factor (EF-2)
Diptheria toxin (cornybact dipth) and Exotoxin A (pseudomonas)
Toxins that inactivate 60S rubosome by cleaving rRNA
Shiga Toxin (Shigella) and Shiga Like Toxin (EHEC, O157:H7)
Toxin that overactivates cAMP --> increased Cl- secretion in the guy and H20 efflux
Heat LABILE toxin (ETEC-->watery diarrhea)
Toxin that overactivates guanylate cyclase (cGMP)--> decrease reabsorption of NaCl and H20 in the guy
Heat STABILE toxin (ETEC-->watery diarrhea and Yersenia Entercolitica -->bloody diarrhea)
Toxin that mimics adenylate cyclase enzyme (increase cAMP)
Edema factor (Bacillus anthracis)
Toxin that permanently activates Gs --> overactive cAMP
-->increased Cl- secretion in gut and water efflux
Cholera toxin (Vibrio cholerae)
Overactiv cAMP by DISABLING Gi --> imparing phagocytosis to permit survival of microbe
Pertussis toxin (Bordetella pertussis)
Toxin that cleaves SNARE protein required for NT release
Tetanospasm- Clostridium Tetani
and Botulinum toxin - Clos botulinum
Toxin that is a phospholipase, degrade tissue and cell membranes
Alpha toxin (Clostridium perfringens)
Toxin that degrades cell membrane `
Streptolysin O (strep pyo)
Superantigen, brings MHCII and TCR in proximity to cause an overwhelmin release of IFN gamma and IL2-->shock
Exotoxin A (Strep pyo) and TSST1 (Staph aurues)
Transformation
ability to take up DNA from environment

(strep pneumo, Hib, and Neisseria)
Conjugation
Bacteria changing plasmid DNA
F+ plasmid has genes for conjugation
Transposition
Segment of DNA can jump frome one location to another to transfer genes from plasmmid to chromosome and vice versa
Generalized transduction
"packaging"- lytic phage infects bacterium--> cleavage of bacterial DNA and synthesis of viarl ptns.
parths of the bacterial chromosomal DNA may become packaged into the apsid, phage infections other bacterium transferring these genes
specialized Transduction
"excision" event
lsogenic phage infects the bacterium --> viral dna incorporated into the bacterial chromosome
-when the phage DNA is excised, flanking bacterial genes may be excised with it
-DNA is packaged into phage viral capsid, can infect another bacterium
G+ branching filament, aerobe, acid fast
Nocardia
G+ branching filament, Anaerobe, not acid fast
Actinomyces
G+ Rods
Clostridium (anaerobe)
Cornybacterium
Listeria
Bacillus
G+ Cocci, Catalase +, Coagulase +
Staph aureus
G+ cocci, Catalase +, Coag-, Novobiocin sensitive
S. epidermidis
G+ cocci, Catalase +, Coagulase -, novobiocin resistent
S Saprophyticus
G+ "diplococci", Catalase -, Alpha hemolysis, Capsule, bile soluble, optochin sensitive
S. pneumoniae
G+ cocci, Catalase -, Alpha hemolytic, no capsule, optochin resistant, insoluble in bile
Viridans strep
G+ cocci, Catalase -, beta hemolysis, bacitracin sensitive
Group A, S. pyogenes
G+ cocci, Catalase -,beta hemolytic, bacitracin resistant
Group B strep (Strep agalactiae)
G+ cocci, Catalase -, no hemolysis (gamma), growth in bile and 6.5% NaCl
Enterococcus (E faecalis)
G+ cocci, Catalase -, gamma hemolysis, Grows in bile, NOT in 6.5% NaCl
Non enterococcus (Strep Bovus)
Strep pneumo is the most common cause of...
MOPS- meningitis, otitis media (in kids), pneumonia, sinusitis
Lancet shaped G+ diplococci
Strep Pneumo
Rusty sputum pneumonia
strep pneumo
produces CAMP factor that enlarges the area of hemolysis formed by S. aureus
GBS
Lab diagnosis based on G+ rods with metachromatic (blue and red) granules
Cornybacterium diptheriae
Grows on tellurite agar
Cornybacterium diptheriae
Do an Elek test for toxin
Cornybacterium diptheriae
blocks GABA release from renshaw cells in the spinal cord--> spastic paralysis, trismus and risus sardonicus
Tetanus
C dif toxins=
Toxin a= enterotoxin- binds to brush border of gut-

Toxin B- cytotoxin- destroys the cytoskeletal structure of the entercytes-->pseudomembranous colitis
"actin rockets" to move from cell to cell
-characteristic tumbling motility
Listeria monocytogenes
mycobacteria--> pulmonary TB symptoms in COPD patients
M. kansasii
Triad for HUS
anemia
thrombocytopenia
acute renal failure
E. coli that doesnt ferment sorbitol
EHEC
4 A's of Klebsiella
Aspiration pneumonia, Abscess in lung and liver, Alcoholics, diAbetics
causes typhoid fever
salmonella typhi
propell themselves via actin polymerization
shigella
Antibiotics lengthen diarrheal illness
salmonella
common antecedant to guillan barre
campylobacter jejuni
Comma, S shaped G- grows in 42 C
oxidase +
-LIKES HEAT
Campylobacter jejuni
3 stages of lyme dx
1. erythema chronicum migrans, flue like symptoms
2. Neurologic (bells palsy) and cardiac (AV node block)
3. Chronic monoarthritis and migratory polyarthritis
-bilateral bells palsy
The Yaws
Treponema Pertenue
Early: "the snuffles"- blood tinged nasal secretions

Late signs: Saber shins, saddle nose, CNEII deafness, hutchinson's teeth, mulberry molars
Congenitall syph
False +'s in VDRL
Viruses, Drugs, Rheumatic fever, Lupus and leprosy
Bartonella
Cat scratch
Borrelia recurrentis
Recurrent fever from the louse
Brucella
Brucellosis/undulent fever, from unpasturized dairy or animals
-problem in preggers
Chlamydophila psittaci
psittacosis from parrots/birds
coxiella burnetti
q fever, from spores from tick feces and cattle placenta
Erhlichiosis chaffeensis
Ehrlichiosis from lone star tick
Franciscella tularensis
tularemia from rabbits, ticks, deer fly
Leptospira
Leptosprosis from animal urine
Mycobacterium leprae
leprosy from armadillos
Pasteruella multicoa
cellulitis and osteomyeltis from animal bites
Rickettsia prowazekii
Epidemic typhus from louse
Rickettsia rickettsii
RMSF, from dermacentor tick bite
Rickettsia typhi
Endemic typhus from flea
Yersenia pestis
Plauge from flea bites, rodents or prarie dogs
chlamydial cell wall lacks
muramic acid
high titer of cold agglutinins (IgM), grown on eatons agar, only bacterial membrane containing cholesterol (req cholesterol to grow!)
Mycoplasma pneumoniae
chorioretinitis, hydrocephalus, intracranial calcifications
congenital toxoplasma gondii
ring enhancing lesions on brain CT/MRI
Toxoplasmosis gondii in HIV brain abscess
Treatment for Toxoplasma gondii
Sulfadiazine, pyrimethamine and folinic acid
Treatment for Giardia
MEtronidazole or tinidozole
Tx for Entamoeba
Intestinal-->metronidazole ar tinidazole
Cyst--> iodoquinol or parathomycin
Tx for Trypanosoma brucei
Suramin for blood borne dx, Melarsoprol for CNS penetration
cyclic fever, headache, anemia, splenomegaly
malaria
48 hr cycle fever and dormant form in liver
P. vivax/ovale
Tx for P. vivax/ovale
Chloroquine and primaquine (for dormant liver)
Severe irregular fever patterns, parasitized RBCs occlude capillaries in brain, kidnes and lungs
P. falciparum
Malaria w/ 72 hr cycle
P. malariae
Fever, hemolytic anemia, transmitted by ixodes tick, maltese cross and trophozoite ring form
Babesia
Spiking fevers, hepatosplenomegaly, pancytopenia
transmitted from sand fly
leishmania donovani