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Microbiology > Enteric Bacilli > Flashcards

Enteric Bacilli Flashcards

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Biology 101 flashcards
1
Q

Enteric Bacteria

A
  • Affects GI system
  • Gram-negative
  • Non-spore forming
  • Facultatitivley anaerobic
  • Bacillus (rod-shaped)
    Salmonella typhi
    Shigella dysenteriae
    Echerichia coli
    Klebsiella pneumoniae
    Proteus mirabilis
    Pseudomonas aeruginosa
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2
Q

Salmonella typhi Characteristics
Enteric Bacilli

A
  • Rod Shaped (bacillus)
  • Flagella (Motile)
  • Facultative Anaerobe: prefer oxygen but can go without it if forced to
  • Gram-Negative: cell wall is thin; pink when stained; penicillin-resistant
  • Obligate Parasite
  • Found only in human feces
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3
Q

Salmonella typhi Diseases
Enteric Bacilli

A

Typhoid Fever of the alimentary canal (GI Tract): Fever, diarrhea, nausea, severe headache, loss of appetite

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4
Q

Salmonella typhi Virulence
Enteric Bacilli

A
  • Capsule (resists phagocytosis)
  • Flagella
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5
Q

Salmonella typhi Mode of Transmission
Enteric Bacilli

A
  • Indirect: Ingestion (Fecal-Oral Route: Fecal matter is spread to food/water then ingested)
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6
Q

Salmonella typhi Portal of Entry and Exit
Enteric Bacilli

A
  • GI Tract: Ingestion of contaminated food; exit through diarrhea
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7
Q

Shigella dysenteriae Characteristics
Enteric Bacilli

A
  • Affects the alimentary canal (GI Tract)
  • Rod Shaped (bacillus)
  • Facultative Anaerobe: prefer oxygen but can go without it if forced to
  • Gram-Negative: cell wall is thin; pink when stained; penicillin-resistant
  • Most virulent form of shigella
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8
Q

Shigella dysenteriae Diseases
Enteric Bacilli

A
  • Shigellosis (bacillary dysentery): Severe form of diarrhea with blood and mucus in the stool
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9
Q

Shigella dysenteriae Virulence
Enteric Bacilli

A

Toxins (Shigella toxin)

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10
Q

Shigella dysenteriae Entry and Exit
Enteric Bacilli

A

GI Tract

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11
Q

Shigella dysenteriae Modes of Transmission
Enteric Bacilli

A

Indirect: Ingestion

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12
Q

Echerichia coli Characteristics
Enteric Bacilli

A
  • Found in the lower gut (GI Tract)
  • Rod Shaped (bacillus)
  • Facultative Anaerobe: prefer oxygen but can go without it if forced to
  • Gram-Negative: cell wall is thin; pink when stained; penicillin-resistant
  • Found in normal flora
  • Most significant opportunistic pathogen
  • Most common pathogen to cause UTI’s
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13
Q

Echerichia coli Diseases
Enteric Bacilli

A
  • Gastroenteritis: Inflammation of the GI tract
  • Traveler’s Diarrhea
  • Infantile Diarrhea
  • Hemorrhagic Colitis/ Hemorrhagic Uremic Syndrome (HUS)
  • Bacillary Dysentery of the Alimentary canal
  • Urinary Tract Infections
  • Infections of the bladder, kidneys, ureters, and urethra
  • Most significant opportunistic pathogen
  • Most common pathogen to cause UTI’s
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14
Q

Echerichia coli Virulence
Enteric Bacilli

A
  • Toxins (will cause GI disturbances)
  • Pili/Fimbriae (aids in attachment)
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15
Q

Echerichia coli Portals of Entry and Exit
Enteric Bacilli

A
  • GI Tract: Ingestion of contaminated food/water; exit through diarreha
  • Urinary Tract: Most common pathogen to cause UTI’s
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16
Q

Echerichia coli Modes of Transmission
Enteric Bacilli

A

Indirect: Ingestion; Fecal/Oral Route (Contaminated fecal matter is transmitted to food/water, then eaten)

17
Q

Klebsiella pneumoniae Characteristics
Enteric Bacilli

A
  • Rod Shaped
  • Gram-Negative: cell wall is thin; pink when stained’ penicillin-resistant
  • Facultative Anaerobe: prefer oxygen but can go without it if forced to
  • Part of Normal Flora
  • Known to cause UTS, wound infections and ear infections, especially among burn victims
18
Q

Klebsiella pneumoniae Diseases
Enteric Bacilli

A
  • Lobar Pneumonia
  • Hospital Acquired/ Nosocomial Pneumonia
  • Gastroenteritis
  • Urinary Tract Infections
19
Q

Klebsiella pneumoniae Virulence
Enteric Bacilli

A

Capsule (resists phagocytosis)

20
Q

Klebsiella pneumoniae Portals of Entry and Exit
Enteric Bacilli

A
  • Broken Skin: Through burn wounds
  • Urinary Tract: Nosocomial pathways
  • GI Tract: Opportunistic pathogen
21
Q

Klebsiella pneumoniae Modes of Transmission
Enteric Bacilli

A
  • Direct: Droplet transmission
  • Direct: passed by hospital personnel
  • Indirect: Fomites
    • Part of normal flora and can move to the lungs
22
Q

Proteus mirabilis Characteristics
Enteric Bacilli

A
  • Rod Shaped (bacillus)
  • Facultative Anaerobe: prefer oxygen but can go without it if forced to
  • Gram-Negative: cell wall is thin; pink when stained; penicillin-resistant
  • Found in the alimentary canal (GI Tract)
23
Q

Proteus mirabilis Diseases
Enteric Bacilli

A
  • Secondary infection from burn wounds; bacterial colonies smell like “burned chocolate”
  • Gastroenteritis: inflammation of the GI tract
  • Urinary Tract Infections
  • Can also cause UTS, ear and wound infections, especially in burn victims
24
Q

Proteus mirabilis Virulence
Enteric Bacilli

A
  • Pili (aids in attachment)
  • Flagella and enzyme urease (turns urea into ammonia which is too alkaline)
25
Q

Proteus mirabilis Portals of Entry and Exit
Enteric Bacilli

A
  • Broken Skin: Through burn wounds
  • GI Tract: Opportunistic
  • Urinary Tract: Nosocomial pathways
26
Q

Proteus mirabilis Modes of Transmission
Enteric Bacilli

A
  • Opportunistic infection
  • Nosocomial Infections
  • Direct: Direct contact
  • Indirect: Fomites
27
Q

Pseudomonas aeruginosa Characteristics
Enteric Bacilli

A
  • Produces blue-green pus
  • Rod Shaped (bacillus)
  • Considered either Anaerobe or Facultative Anaerobe: prefer oxygen but can go without it if forced to
  • Gram-Negative: cell wall is thin; pink when stained; penicillin-resistant
  • Opportunistic pathogen
  • Part of normal flora
28
Q

Pseudomonas aeruginosa Diseases
Enteric Bacilli

A
  • Burn Wound Infections
  • Urinary Tract Infections
  • Gastroenteritis
  • Pneumonia
  • Ear Infections
  • Produces blue-green pus
29
Q

Pseudomonas aeruginosa Virulence
Enteric Bacilli

A
  • Pili (aids in attachment)
  • Resists antibiotic tratment and disinfectants
  • Toxic Proteins
30
Q

Pseudomonas aeruginosa Portals of Entry and Exit
Enteric Bacilli

A
  • Broken Skin: Through burn wounds
  • GI Tract: Opportunistic (part of normal flora)
  • Urinary Tract: Nosocomial pathways
  • Respiratory Tract: Droplet transmission
  • Ear: Droplet transmission
31
Q

Pseudomonas aeruginosa Modes of Transmission
Enteric Bacilli

A
  • Opportunistic infection
  • Nosocomial Infections
  • Direct: Direct contact
  • Indirect: Fomites

Microbiology (22 decks)

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