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Microbiology > Pyogenic Bacteria > Flashcards

Pyogenic Bacteria Flashcards

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1
Q

Staphylococcus aureus Diseases
Pyogenic

A
  • Skin Abscesses
  • Food Poisoning
  • Toxic Shock
  • Nosocomial Infections
  • Impetigo/School Sores: contagious red sores
  • Scalded Skin Syndrome
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2
Q

Staphylococcus aureus Characteristics
Pyogenic

A
  • Pyogenic Bacteria
  • Spherical
  • Grape-Like Clusters
  • Gram Positive
  • Facultative Anaerobe
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3
Q

Staphylococcus aureus Virulence
Pyogenic

A
  • Enterotoxins
  • Enzymes
  • Capsule (resists phagocytosis)
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4
Q

Staphylococcus aureus Modes of Transmission
Pyogenic

A
  • Direct: Droplet Transmission (Pneumonia)
  • Direct: Broken Skin (Impetigo, Skin ABscesses, Scalded Skin Syndrome)
  • Indirect: Fomites
  • Indirect: Airborne Transmission
  • Indirect: Ingestion of contaminated food
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5
Q

Staphylococcus aureus Portals of Entry and Exit
Pyogenic

A
  • Broken Skin: Entry through broken skin; Exit through skin abscesses
  • GI Tract: Entry through ingestion of contaminated food; Exit through release of bacteria through diarrhea
  • Respiratory Tract: Inhalation of droplets; Exit through coughing and snot
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6
Q

Streptococcus pyogenes Diseases
Pyogenic

A
  • Strep Throat: Sore throat
  • Rheumatic Fever: Inflammatory disease that occurs when strep throat or scarlet fever are not resolved
  • Scarlet Fever: (Childbirth Fever) Red rash, strawberry tongue, desquamation of skin
  • Puerperal Sepsis: Nosocomial infection of the uterus from childbirth or abortion
  • Impetigo: Localized skin infection with small vesicles that turn into weeping lesions
  • Erysopelas/St. Anthony’s Fire: Localized skin infection that causes an intense burning sensation
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7
Q

Streptococcus pyogenes Characteristics
Pyogenic

A
  • Pyogenic
  • Spherical
  • Chain-Like Arrangement
  • Gram Positive
  • Facultative Anaerobe
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8
Q

Streptococcus pyogenes Virulence
Pyogenic

A
  • Toxins
  • Enzymes
  • Capsule (resists phagocytosis)
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9
Q

Streptococcus pyogenes Modes of Transmission
Pyogenic

A
  • Direct: Droplet Transmission (Step throat, scarlet fever)
  • Direct: Broken Skin (Impetigo, St. Anthony’s Fire)
  • Indirect: Fomites (Puerperal Sepsis, Childbirth Fever)
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10
Q

Streptococcus pyogenes Portals of Entry and Exit
Pyogenic

A
  • Broken Skin: Entry through broken skin; Exit through skin abscesses
  • Respiratory Tract: Entry through droplet transmission; Exit through coughing or snot
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11
Q

Streptococcus agalactiae Diseases
Pyogenic

A
  • Bacterial Sepsis (STREP SEP)
  • Meningitis
  • Seizures
  • Psychomotor Retardation
  • Uterine Infections
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12
Q

Streptococcus agalactiae Characteristics
Pyogenic

A
  • Spherical cells that often appear alone, in pairs or chains
  • Saprophyte: Survives on dead or decaying matter
  • Pyogenic: Pus-forming Bacteria
  • Enterotoxin: Type of exotoxin that affect host cells lining the gastrointestinal tract.
  • Facultatively Anaerobic: Prefer oxygen but can go without it if forced to.
  • Gram Positive: Cell wall is thick; Purple when stained; killed by penicillin
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13
Q

Streptococcus agalactiae Virulence
Pyogenic

A
  • Toxins
  • Enzymes
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14
Q

Streptococcus agalactiae Modes of Transmission
Pyogenic

A
  • Congenital transmission: placental or in the birth canal
  • Ingestion: contaminated food/water
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15
Q

Streptococcus agalactiae Portals of Entry and Exit
Pyogenic

A
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16
Q

Streptococcus pneumonia/Pneumococcus Diseases
Pyogenic

A
  • Lobar pneumonia: Inflammation of one or several lung lobes
  • Otitis Media: Middle ear infection
  • Meningitis or pneumococcal meningitis: Infection of the cerebrospinal fluid
17
Q

Streptococcus pneumonia/Pneumococcus Characteristics
Pyogenic

A
  • Spherical cells that often appear in chains
  • Pyogenic: Pus-forming Bacteria
  • Facultatively Anaerobic: Prefer oxygen but can go without it if forced to.
  • Gram Positive: Cell wall is thick; Purple when stained; killed by penicillin
18
Q

Streptococcus pneumonia/Pneumococcus Virulence
Pyogenic

A

Capsule: Resists phagocytosis

19
Q

Streptococcus pneumonia/Pneumococcus Modes of Transmission
Pyogenic

A
  • Direct: droplet transmission or direct oral contact
  • Indirect: Contaminated Fomites
20
Q

Streptococcus pneumonia/Pneumococcus Portals of Entry and Exit
Pyogenic

A

Respiratory Tract: Coughing or nasal drainage

21
Q

Neisseria gonorrhoeae Diseases
Pyogenic

A
  • Gonorrhea: STD infection of the genitals
  • Ophthalmia Neonatorum: Congenital infection spread from the mother to the eyes of the baby during childbirth
  • Pelvic Inflammatory Disease: (PID) Infection of the female reproductive organs
22
Q

Neisseria gonorrhoeae Characteristics
Pyogenic

A
  • Spherical
  • Diploccoccus: bacteria that appear in pairs of cocci
  • Pyogenic: Pus-forming Bacteria
  • Aerobic: Bacteria that prefer to live in oxygen-filled environments
  • Gram Negative: cell wall is thin; pink when stained; penicillin-resistant
23
Q

Neisseria gonorrhoeae Virulence
Pyogenic

A
  • Pili/Fimbriae: help attach the cell to surfaces
  • Endotoxins
24
Q

Neisseria gonorrhoeae Modes of Transmission
Pyogenic

A
  • Direct: Sexual Contact or Congenital contact
  • Indirect: Contaminated Fomites
25
Q

Neisseria gonorrhoeae Portals of Entry and Exit
Pyogenic

A
  • Genitourinary Tract: Through genitals or genital secretions
  • Eyes: Through the eyes or eye secretions
26
Q

Neisseria meningitidis Diseases
Pyogenic

A
  • Epidemic Meningitis: (Meningococcal meningitis): Infection of the meninges
  • Meningococcemia: Bacteria spread to blood stream
  • Waterhouse-Fredichsen Syndrome: Spontaneous bleeding in the subcutaneous tissues causing appearance of purple patches on the skin
27
Q

Neisseria meningitidis Characteristics
Pyogenic

A
  • Spherical
  • Diploccoccus: bacteria that appear in pairs of cocci
  • Pyogenic: Pus-forming Bacteria
  • Aerobic: Bacteria that prefer to live in oxygen-filled environments
  • Gram Negative: cell wall is thin; pink when stained; penicillin-resistant
  • Can be fulminant: rapid onset, short duration; ends in death
28
Q

Neisseria meningitidis Virulence
Pyogenic

A
  • Pili/Fimbriae: help attach the cell to surfaces
  • Endotoxins
  • Capsule (resists phagocytosis)
29
Q

Neisseria meningitidis Modes of Transmission
Pyogenic

A
  • Direct: Droplet transmission or direct oral contact (saliva)
  • Indirect: Contaminated Fomites
30
Q

Neisseria meningitidis Portals of Entry and Exit
Pyogenic

A

Respiratory Tract: Through droplet transmission or saliva

Microbiology (22 decks)

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