Species groups Flashcards
All the species groups talked about are gram negative. What is the one that is only “considered” gram negative and why?
Mycoplasmas, they don’t have a cell wall and there for cannot stain positive or negative
What species groups have a bacilli morphology?
-Bacteroide
-Proteus
-Pseudomonas
-Shigella
-Rickettsia prowazekii, typhi, and rickettsii
-Coxiella burnetii
What species groups have a coccus morphology?
-Mycoplasmas
-Chlamydia psittaci and trachomatis
All of the species groups are aerobes except for who?
What are their oxygen requirements?
-Bacteroide: Obligate anerobe
-Shigella: Facultative aerobe
-Chlamydia trachomatis: Anaerobe
Which are the 3 motile species groups?
-Bacteroide (some)
-Proteus (highly)
-Pseudomonas
None of the species can form endospores except for who?
Bacteroide
Who are the opportunistic saprophytes?
Proteus
Who is often resistant to antibiotics and their cell wall allows them to survive in harsh conditions?
Pseudomonas
Who is ofter associated with poor hygiene, contaminated food and water, and flies and produces toxins that cause inflammation and tissue damage in the colon?
Shigella
Who’s colonies adhere easily to surfaces in the respiratory and urogenital tract and are resistant to many antibiotics?
Mycoplasmas
Species where humans are the natural reservoir and are Obligate intracellular parasites
Rickettsia prowazekii
Who is found in the saliva of a tick?
Rickettsia rickettsii
Highly resistant to environmental factors and are very similar to Rickettsia but are not
Coxiella burnetii
Which species groups are obligate parasites and have rigid cell walls?
Chlamydia psittaci and trachomatis
Who is responsible for Epidemic typhus (louse-born tyophus).
Rickettsia prowazekii
Transmitted when a human scratches open a wound and rubs fecal matter from the the body louse into the wound.
-Found in overcrowded areas with poor sanitation
-May cause white fur to grow on tongue or cause tongue to be black and rolled up
-Causes rash on hands and feet, fatigue, headache, and neurological symptoms
Epidemic typhus (louse-born typhus)
Who causes Endemic typhus?
Rickettsia typhi
Transmitted from rat flea to humans.
-Warm climates
-Sometimes associated with rash
Endemic typhus
Who is responsible for Rock Mountain spotted fever?
Rickettsia rickettsii
Severe infection
-Causes rash on hands and feet
-Headache, muscle ache, fever, nausea, and vomiting
-More common in SE US and Appalachia
Rocky Mountain spotted fever
Who causes Q fever?
Coxiella burnetii
Associated with fever headache, malaise, muscle pain, and nausea.
-Can lead to endocarditis up to 20 years after the initial infection
Q fever
What species causes Psittacosis (parrot fever)?
Chlamydia psittaci
A form of pneumonia, associated with birds, transmitted via inhalation of aerosolized microbes from bird droppings
Psittacosis (parrot fever)
