Mycoplasma and Rickettsia

Question 1

Mycoplasma pneumonia Diseases

Answer 1

Primary Atypical Pneumonia (Walking Pneumonia)

Question 2

Mycoplasma pneumonia Characteristics

Answer 2

• No cell wall
• Mycoplasmas are the smallest free-living bacteria
• Mycoplasmas look like fried eggs
• Pleomorphic: Occurring in various distinct forms

Question 3

Mycoplasma pneumonia Virulence

Answer 3

No virulence factors

Question 4

Mycoplasma pneumonia Portals of Entry and Exit

Answer 4

Respiratory Tract

Question 5

Mycoplasma pneumonia Modes of Transmission

Answer 5

Direct: Droplet Transmission

Question 6

Rickettsia prowazekii Diseases

Answer 6

Epidemic Typhus (Louse borne Typhus): Fever and Skin Rash

Question 7

Rickettsia prowazekii Characteristics

Answer 7

• Obligate intracellular parasite: Not self-replicating; require a host cell to replicate
• Arthropod spread (lice)
• Nonmotile
• Gram-Negative - cell wall is thin; pink when stained’ penicillin-resistant
• Bacilli

Question 8

Rickettsia prowazekii Virulence

Answer 8

Obligate intracellular parasite: Not self-replicating; require a host cell to replicate

Question 9

Rickettsia prowazekii Portals of Entry and Exit

Answer 9

Broken Skin: from lice bite

Question 10

Rickettsia prowazekii Modes of Transmission

Answer 10

Indirect: Vector/Arthropod transmission (lice)

Question 11

Rickettsia typhi Diseases

Answer 11

Endemic Typhus (Flea borne Typhus, Murine Typhus): Fever and Skin Rash

(Less aggressive illness than Epidemic Typhus; self-resolving)

Question 12

Rickettsia typhi Characteristics

Answer 12

• Obligate intracellular parasite: Not self-replicating; require a host cell to replicate
• Arthropod spread (flea)
• Nonmotile
• Gram-Negative - cell wall is thin; pink when stained’ penicillin-resistant
• Bacilli

Question 13

Rickettsia typhi Virulence

Answer 13

Obligate intracellular parasite

Question 14

Rickettsia typhi Portals of Entry and Exit

Answer 14

Broken Skin: from flea bite

Question 15

Rickettsia typhi Modes of Transmission

Answer 15

Indirect: Vector/Arthropod transmission (flea)

Question 16

Rickettsia rickettsii Diseases

Answer 16

• Rocky Mountain Fever (Tick borne Typhus, Murine Typhus): Fever and Skin Rash

RickRick=Tick

Question 17

Rickettsia rickettsii Characteristics

Answer 17

• Obligate intracellular parasite: Not self-replicating; require a host cell to replicate
• Arthropod spread (wood or dog tick)
• Nonmotile
• Gram-Negative - cell wall is thin; pink when stained’ penicillin-resistant
• Bacilli

Question 18

Rickettsia rickettsii Virulence

Answer 18

Obligate intracellular parasite

Question 19

Rickettsia rickettsii Portals of Entry and Exit

Answer 19

Broken Skin: from tick bite

Question 20

Rickettsia rickettsii Modes of Transmission

Answer 20

Indirect: Vector/Arthropod transmission (tick)

Question 21

Coxiella burnetii Diseases

Answer 21

• Q Fever: fever and skin rash

q for query=unknown

Question 22

Coxiella burnetii Characteristics

Answer 22

• Obligate intracellular parasite: Not self-replicating; require a host cell to replicate
• Vector/arthropod spread
• Nonmotile
• Gram-Negative - cell wall is thin; pink when stained’ penicillin-resistant
• Bacilli

Question 23

Coxiella burnetii Virulence

Answer 23

Obligate intracellular parasite

Question 24

Coxiella burnetii Portals of Entry and Exit

Answer 24

• Broken Skin: from tick bite
• Respiratory Tract
• GI Tract

Question 25

Coxiella burnetii Modes of Transmission

Answer 25

• Indirect: Ingestion of contaminated food
• Indirect: Inhalation of airborne particles
• Indirect: tickborne

may also spread from delivering calves