Bacteria Flashcards
In seriological typing, what is meant by “type O antigens”?
Cell wall antigens
In serological typing, what is meant by “H antigens”?
Flagella antigens
In serological typing, what is meant by “type P antigens”?
Pilus antigens
In serological typing, what is meant by “k antigens?”
Capsule
With regards to serological typing, in E. Coli O157:H7, where are the antigens located?
Cell wall antigen 157
Flagella antigen 7
Which genus of bacteria have the following characteristics:
Acid fast positive
Gram positive, bacilli, thin, straight, tend to clump
Multilayered cell wall
Complex waxes and long chained fatty acids (70-80 carbons)
Selective media is required
Slow growing (6-9 weeks)
Genus mycobacterium
What are the two selective media required for growing genus mycobacterium?
Lowenstein Jensen agar
Middlebrook agar
What type of stain and shape is mycobacterium tuberculosis?
Gram +
Bacilli
Acid fast +
Which bacteria is tested by the Tine test and the Mantoux tests?
Mycobacterium Tuberculosis
What is the primary lesion of myobacterium tuberculosis called?
Tubercle
What is the vaccine bacteria for myobacterium tuberculosis?
Myobacterium bovis
What does the BCG Vaccine protect against in humans?
Myobacterium tuberculosis
How is myobacterium tuberculosis spread?
Pulmonary - through aero soles
Which bacterium has a classic presentation of “cording factor” looping of cell wall lipids?
Myobacterium tuberculosis
Which bacteria leaves behind a “Gohn Complex”?
Myobacterium tuberculosis
Circular lesions on x ray that look like cheese due to their central caseating necrosis surrounded by macrophages trying their best to phagocytize the bacteria.
Gohn Complex
Why can’t the macrophages take care of myobacterium tuberculosis?
The organism is phygocytized but there is no lysosomal fusion
A positive PPD test for tuberculosis causes what type of Hypersensititvity reaction?
Type IV HSR - Delayed
Why does the US not typically give the BCG Vaccine?
Because it show up positive on a PPD skin test if a pt. Has been vaccinated before
What shape and gram test results would you find with Mycobacterium Bovis?
Gram +
Bacillus
Acid Fast +
Which bacteria is similar to myobacterium tuberculosis but in cows?
Mycobacterium bovis
Which bacteria has the following characteristics: spread through unpasteurized milk or imported cheeses, especially from Mexico and central and South America, is gram +, bacilli shaped, and acid fast +?
Mycobacterium bovis
Causative agent of Hansen’s disease
Mycobacterium leprae
Which bacteria does not grow in artificial medium and uses armadillos and rats as a reservoir?
Mycobacterium leprae
What are the two forms of mycobacterium leprae?
Lepramatous and tuberculoid
Which bacteria has the following characteristics: damage to extremities (cooler areas), causes nerve damage and bone reabsorption during infection, is treated with sulfa drugs, there is no vaccine because the virulence factor is poorly understood but we do know the disease is not spread via the lesions.
Mycobacterium leprae
Which group of bacterium have no protection from spores, oxygen will kill them, are found deep within the body develop endogenous diseases from normal flora getting out of normal area, highly pleomorphic, diseases are poly micro in, cause abscesses, Prereduced anerobically sterile PRAS media required, gram variable, have Gas Liquid Chromatography (GLC) lipid profiles and are IDed by fatty acid profiles?
Non-sporeforming anaerobes
Which bacteria has the following characteristics: gram - bacillis, normal intestinal flora, cause endogenous infections/internal abscesses), are opportunistic when there is an intestinal rupture (knife wound, gunshot wound, bursting appendix, abdominal damage), uses a polysaccharide capsule and endotoxin as its virulence factor causing it to be naturally resistant to antibiotics, is difficult to find in fecal material because it is a non-spore forming and robe and the exposure to O2 will kill it?
Bactericides fragilis
