Alexandra Shared "STEP Microbiology" - 91 Picmonics
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STEP Microbiology
Enterohemorrhagic E. Coli (EHEC)
- Characteristics
- O157:H7
- Non-Sorbitol Fermenting
- Hamburger Meat
- Produces Shiga-like Toxin
- Gram-negative
- Lysogeny
- Inactivates 60S Ribosome
- Disease
- Bloody Diarrhea
- Hemolytic Uremic Syndrome (HUS)
- Hemolytic Anemia
- Acute Renal Failure
- Thrombocytopenia
2 mins
Vibrio Cholera Disease
- ADP Ribosylating AB Toxin
- Turn Gs on Causing Increase in cAMP
- Secretion of Cl
- Blocks Reabsorption of Na
- Rice Water Diarrhea
1 min
Staphylococcus aureus Characteristics
- Characteristics
- Gram-Positive
- Cocci
- Catalase-Positive
- Coagulase-Positive
- Beta-Hemolytic
- Protein A Virulence Factor
- Inhibits Phagocytosis
- MRSA
- Resistant to Beta Lactams Due to Altered Penicillin Binding Proteins (PBPs)
2 mins
Staphylococcus epidermidis
- Characteristics
- Cocci
- Gram-Positive
- Catalase-Positive
- Urease-Positive
- Coagulase-Negative
- Novobiocin-Sensitive
- Component of Normal Skin Flora
- Infects Prosthetic Devices and IV Catheters
- Contaminates Blood Cultures
- Produces Adherent Biofilms
2 mins
Staphylococcus saprophyticus
- Characteristics
- Gram-Positive
- Cocci
- Catalase-Positive
- Coagulase-Negative
- Novobiocin-Resistant
- Urease-Positive
- Disease
- Urinary Tract Infections (UTI's)
1 min
Streptococcus Pneumoniae Characteristics
- Characteristics
- Gram-Positive
- Diplococci
- Lancet-Shaped
- Catalase-Negative
- Optochin-Sensitive
- Bile Soluble
- Alpha-Hemolytic
- Polysaccharide Capsule
- Positive Quellung Reaction
- IgA Protease
1 min
Streptococcus Pneumoniae Disease
- Signs and Symptoms
- Sickle Cell Anemia
- Sepsis in Patients with Splenectomy
- Rusty Sputum
- MOPS
- Meningitis
- Otitis Media
- Pneumonia
- Sinusitis
2 mins
Streptococcus viridans
- Characteristics
- Gram-Positive
- Cocci
- Catalase-Negative
- Alpha-Hemolytic
- Optochin-Resistant
- Not Bile Soluble
- Normal Flora of Oropharynx
- Synthesize Dextrans from Sucrose
- Disease
- Dental Caries
- Subacute Bacterial Endocarditis
2 mins
Streptococcus pyogenes Characteristics
- Characteristics
- Group A Streptococci (GAS)
- Gram-Positive
- Cocci
- Beta-Hemolytic
- Catalase-Negative
- Bacitracin-Sensitive
- Hyaluronic Acid Capsule
- Streptolysin O
- DNase
- Streptokinase
- Exotoxin A
- Pyrrolidonyl Arylamidase (PYR) Positive
2 mins
Streptococcus agalactiae
- Characteristics
- Group B Streptococci
- Gram-Positive
- Cocci
- Beta-Hemolytic
- Bacitracin-Resistant
- Catalase-Negative
- Pyrrolidonyl Arylamidase (PYR) Negative
- Polysaccharide Capsule
- Hippurate Positive (+)
- Produces CAMP Factor
- Enlarges Area of Hemolysis by S. aureus
- Disease
- Mainly in Babies
- Meningitis
- Pneumonia
- Sepsis
- Colonizes Vagina
- Treatment
- Screen Pregnant Women at 35-37 Weeks
- Penicillin
3 mins
Enterococci
- Characteristics
- Gram-Positive Cocci
- Catalase Negative
- 6.5% NaCl
- Grows in Bile
- Normal Colonic Flora
- Signs and Symptoms
- Urinary Tract Infection
- Subacute Endocarditis
- Penicillin Resistant
- VRE (Vancomycin Resistant Enterococci)
2 mins
Bacillus Anthracis (Anthrax) Characteristics
- Characteristics
- Gram-Positive
- Spore-Forming
- D-glutamate Polypeptide Capsule
- Protective Antigen
- Lethal Toxin
- Edema Factor
- Increased cAMP
1 min
Bacillus Cereus Characteristics
- Gram-Positive
- Bacilli
- Endospore Forming
- B Hemolytic
- Toxins and Enterotoxins
- Reheated Rice
1 min
Clostridium tetani
- Characteristics
- Gram-Positive
- Bacilli
- Obligate Anaerobic
- Exotoxin
- Spore-Forming
- Renshaw Cells in the Spinal Cord
- Blocks Glycine and GABA Release
- Signs and Symptoms
- Spasms
- Risus Sardonicus
- Lockjaw
- Opisthotonus
3 mins
Clostridium botulinum
- Characteristics
- Bacillus
- Gram-positive
- Anaerobe
- Spore-forming
- Heat Labile Toxin
- Inhibits Acetylcholine (Ach) Release at Neuromuscular Junction (NMJ)
- Canned Food in Adults
- Spores in Honey
- Signs and Symptoms
- Descending Flaccid Paralysis
- Diplopia
- Ptosis
- Floppy Baby
- Constipation
2 mins
Clostridium perfringens
- Characteristics
- Gram-Positive
- Bacillus
- Anaerobe
- Spore-Forming
- Alpha Toxin Lecithinase
- Phospholipase
- Heat Labile Enterotoxin
- Signs and Symptoms
- Myonecrosis
- Gas Gangrene
- Food Poisoning and Diarrhea
- Treatment
- Hyperbaric O2 Chamber
2 mins
Corynebacterium diphtheriae
- Characteristics
- Gram-Positive
- Bacillus
- Exotoxin
- ADP Ribosylation of Elongation Factor 2
- Beta Prophage
- Lysogeny
- Tellurite Agar
- Chinese Letters
- Metachromatic Blue Red Granules
- Aniline Stains Deeply Methylene Blue
- Signs and Symptoms
- Pseudomembranous Pharyngitis
- Lymphadenopathy
- Myocarditis
- Polyneuritis
3 mins
Listeria Monocytogenes Characteristics
- Characteristics
- Gram Positive
- Bacillus
- Intracellular
- Survives in Cold Temperature
- Actin Rocket
- Tumbling Motility
- Catalase-Positive
- Beta-Hemolytic
- Only Gram-Positive with Endotoxin-Like Structure
2 mins
Neisseria gonorrhoeae Characteristics
- Characteristics
- Gram Negative
- Diplococci
- Chocolate Agar
- Thayer-Martin Media
- VPN
- Oxidase Positive
- Glucose Fermenting
- Pilus
- Opa Surface Protein
- Rapid Antigenic Variation
- IgA Protease
2 mins
Neisseria Meningitidis
- Characteristics
- Gram-Negative
- Diplococci
- Chocolate Agar
- Thayer-Martin Media
- VPN
- Oxidase-Positive
- Maltose Fermentation
- Glucose Fermentation
- Endotoxin
- Lipooligosaccharide (LOS) in Membrane
- Polysaccharide Capsule
- IgA Protease
- Disease
- Waterhouse Friderichsen Syndrome
- Adrenal Insufficiency
- Petechial Rash
- Treatments
- Ceftriaxone
- Rifampin Prophylaxis
5 mins
