VTPB 405 Exam 2- Quiz questions

All of the following are considered virulent factors in the staphylococcus aureus EXCEPT
Lipid A
Protein A
Degradative enzymes
Capsule
Cytotoxins

Staphylococcus saprophyticus cause pyogenic infections of the urinary tract
True
False

Staphylococcus saprophyticus causes TOXIN-mediated infections of the urinary tract
True
False

Staphylococcus epidermidis cause pyogenic infections of intravenous catheter sites and prosthetic devices
True
False

Both, enterotoxins and toxic shock syndrome toxins produced by staphylococcus aureus are considered superantigens
True
False

Scalded skin syndrome is caused by staphylococcus aureus is a toxin mediated disease
True
False

Toxic shock syndrome associated with tampon was due to the contamination of these tampons with staphylococcus aureus
True
False

Staphylococcus aureus can produce a toxin that dissolves the desmosomes that hold the adjoining cytoplasmic membranes of cells together and causes the patient's skin cells to separate from each other
True
False

scalded skin syndrome is caused by staphylococcus aureus is a pyogenic mediated disease
True
False

The nucleases (enzymes that hydrolyzes DNA) are considered a virulence factor because
They destroy the neutrophils extracellular traps
They destroy the DNA of the macrophages
They destroy the DNA of the neutrophils
They attack the DNA of host cells
They attack the DNA of the normal bacterial flora of the host

Diphtheria toxin inhibits protein synthesis by inactivating elongation factor 2 in host cells
True
False

In bacillus anthracis, the protective antigen (PA) plus the lethal factor (LF) form the lethal toxin (LeTx)
True
False

A 43 year old sheepherder has a necrotic eschar on the back of his hand. He has fever, swollen and painful lymph nodes, and is weak. A large boxcar-appearing Gram-positive bacteria is isolated from the sore. This infection is caused by which of the following bacteria?
Bacillus anthracis
Streptococcus pyogenes
Bacillus Cereus
Cornebacterium diphtheriae
Staphylococcus aureus

A vacomycin-resistant staphylococcus aureus was isolated following a mixed infection with vancomyocin-resistant enterococcus. Transformation might explain the transfer of resistance from enterococcus to staphylococcus aureus.
True
False

Acute Glomerulonephritis is a sequalae of repeated infection with streptococcus pyogenes. The pathogenesis involved in this complication is molecular mimicry of the glomerulous cell membrane.
True
False

Streptococcus pyogenes prodcue both streptolysiin 'S' and streptolysin 'O'. Because streptolysin 'O' is immunogenic, the antibody titer in the patient's serum can be measured and used in the diagnosis of streptococcal infection.
True
False

Acute Glomerulonephritis is a sequalae of repeated infection with streptococcus pyogenes. The pathogenesis involved in this complication is antigen-antibody complex precipitation on the surface of the glomerulous cell membrane.
True
False

The tox gene that codes for exotoxin is introduced into strains of corynebacterium diphtheriae by a lysogenic bacteriophage
True
False

Rheumatic fever is a sequalae of repeated infection with streptococcus pyogenes. The pathogenesis involved in this complication is molecular mimicry of the valves of the heart.
True
False

In the bacillus anthracis, the protective antigen (PA) plus the edema factor (EF) form the edema toxin
True
False

In the United States, the Enterobacteriaceae are the primary cause of urinary tract infections
True
False

The majority of human infections with Campylobacter species are caused by which of the following
Direct contact with carriers of the bacterium
Multiplication of the organism in food products
Contamination of food, milk, or water with animal feces
Direct contact with persons infected with the bacterium

Enterhaemorrhagic Escherichia coli (EHEC) produces shiga toxins, to enable and to invade the host tissue
True
False

Which of the Following campylobacter is responsible for abortion in sheep and cattle worldwide?
Campylobacter rectus
Campylobacter jejuni
Campylobacter concisus
Campylobacter fetus

Virulence determinants of Helicobacter pylori include which of the following?
Motility
Urease enzyme
Adhesions
All of the Above

Enteroinvasive Escherichia Coli (EIEC) produces Shiga toxins, to enable it to invade the host tissue
True
False

The virulence factor in Vibrio parhaemolyticus is the thermostable hemolysin (Kanagawa hemolysin)
True
False

The Vibrio cholerae has a holotoxin formed of two sub units A-B, in which 'B' part adheres to the target cell while 'A' part forms the biological function
True
False

Some salmonella spp. are considered facultative intracellular bacteria
True
False

Humans are the sole hosts of Salmonella typhi.
True
False