Common Associations of Bacteria Flashcards
Patient with odontogenic infection develops an oral/facial abscess.
Actinomyces israelii
Branching filamentous bacteria
Forms yellow sulfur granules
Actinomyces israelii
Patient develops bilateral facial nerve palsy after a trip to Northeast.
Borrelia burgdorferi
Visible on light microscopy using Wright or Giemsa stain
Borrelia burgdorferi
Patient with a traumatic open wound develops gas gangrene.
Clostridium perfringens
Club‑shaped bacilli
Clostridium perfringens
Patient punctures their sole with a dirty nail and develops trismus.
Clostridium tetani
Drumstick shaped
Clostridium tetani
A patient with alcohol use disorder presents with pneumonia and currant jelly sputum.
Klebsiella pneumoniae
Mucoid colonies
Klebsiella pneumoniae
A patient that owns 3 cats present with signs of cellulitis.
Pasteurella multocida
Facultative anaerobic gram-negative coccobacillus
Pasteurella multocida
Patient presents with productive cough, nausea, and confusion after a cruise trip.
Legionella pneumophila
Cultured on charcoal yeast extract agar with cysteine and iron
Silver stain
Legionella pneumophila
An unvaccinated child presents with high fever, drooling, and muffled voice.
Haemophilus influenzae
Isolated on chocolate agar
Requires factor X and factor V for culture
Haemophilus influenzae
Patient with a history of severe abdominal trauma develops fulminant sepsis.
Encapsulated bacteria:
S. pneumoniae: gram-positive diplococci
N. meningitidis: gram-negative diplococci
S. pneumoniae: gram-positive diplococci
N. meningitidis: gram-negative diplococci
Encapsulated bacteria
intensely pink on MacConkey agar
E. coli
often red in appearance
Serratia marcescens
swarming motility pattern
Proteus mirabilis
blue-green pigment
Pseudomonas aeruginosa
Leukocyte casts may indicate …
Leukocyte casts may indicate pyelonephritis.
Alkaline urine (pH > 8) indicates….
Alkaline urine (pH > 8) and struvite crystals in sediment: indicate urease-producing organisms (e.g., Proteus, Klebsiella, Staphylococcus saprophyticus)
leading cause of UTI (approx. 80%)
Escherichia coli
gram negative, lactose fermenting rod
2nd leading cause of UTI in sexually active women
Staphylococcus saprophyticus
gram positive , coagulase negative, not sensitive to novobiocin
3rd leading cause of UTI
Klebsiella pneumoniae;
A gram-negative lactose fermenting rod-shaped bacillus
Produces ammonia, giving the urine a pungent or irritating smell
Associated with struvite stone formation
Proteus mirabilis
