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Clinical Micro Exam 3 Q's

Terms in this set (90)

true or false: lipoteichoic acid is found in both gram-positive and gram-negative organisms.

this molecule induces an immune response that activates T-cells and creates a cytokine storm that results in major damage throughout the body

intracellular pathogens use special adaptations to survive inside the host cell. an example of a pathogen that survives inside the host is:

how do microbes acquire resistance?

selection by the environment, being constantly exposed to the antibiotic

true or false: osteomyelitis can develop as a secondary infection

infectious dose is an important consideration in disease. E coli O157:H7 can cause disease with a minimum dose of:

vibrio cholera has a toxin that is:

an AB5 toxin, introduced by a phage

which of these bacteria is likely to be found in the large intestine? (e. coli)

which list represents the most to least reported cases of bacterial food poisoning?

salmonella, campylobacter jejune, vibrio

classical and El Tor are:

The p-pili is a major virulence factor in E. coli causing:

true or false: purpura are larger than petechiae

type 3 secretion systems are:

made of protein only, deliver effectors to host cells

which of the following forms actin pedestals in the large intestine?

infection with helicobacter pylori that develops symptoms results in:

a distinctive odor

which of the following has a toxin that mediates actin remodeling

true or false: blobbing of OMV can be an important virulence factor

which of the following causes pseudo appendicitis?

yersinia enterolitica

which of the following gains entry to a hos via M cells to cause disease?

shigella sonnei

i isolate a hemolysin that can lyse human blood but not sheep blood. i can say it....?

is called the Kangawa hemolysin, could have come from Vibrio parahemolyticus

a normally healthy 4 year old girl has acute abdominal pain and cramps and also shows signs of pale eyelids and cheeks. her mother reports she is having increased frequency of rust colored urine. the signs and symptoms can be explained by:

HUS caused by E. coli

this organism produces a toxin that specifically causes the disruption of tight junctions:

vibrio cholerae

the only "true" species in the genus Salmonella are:

Bongori and Enterica

which of the following has a protein capsule?

yersinia pestis

an A/E lesion requires:

true or false: you are more likely to die from vibrio sp. induced food poisoning if you eat seafood after it was chilled below 13 C.

a retired group of firefighters is on tour in India and they have an outbreak of watery diarrhea. the hospital reports that they see evidence of a curved rod without a capsule. a possible cause is:

campylobacter jejunii

a patient with recently diagnosed Crohn's disease has his stool screened for bacterial composition. they compare it to his brother that does not have Crohn's disease. we could suspect that the patient with Crohn's could have _______ in the stool?

which of the following has the potential to cause a disease that causes severe nerve damage?

which of the following grows in the cytosol of a host cell?

shigella dysenteriae

which of the following uses actin pains to move from cell-to-cell?

which of the following has a toxin that targets DNA?

virulence in yersinia requires genes that are in the chromosome. these genes include:

which of the following is most likely to cause fatal septicemia?

vibrio vulnificus

a 12 year old female returns from camping and presents to her pediatrician complaining of fever, cough with sputum tinged with blood, body aches and wheezing. the doctor noted that she does not have excessive swelling in her lymph nodes. samples of her sputum are plated at 37C. colonies that form are white and mucoid. the most likely cause is:

klebsiella pneumoniae

after returning from a trip to indonesia, a man develops painless nodules on the shaft of his penis. these nodules appear to progress to a wound, but the wound is non-suppurative. what is the most likely causative agent?

klebsiella granulomatis

a patient arrives at the hospital with fever and malaise. they reported some loose stool 3 days earlier but no other symptoms. after 48 hours in the hospital the patient develops a UTI. cultures from the patient show the enterobacterial common antigen is present. we can predict that the patient could have:

P. vulgaris, E. clocoae, Providencia sp

which of the following has a toxin that changes cAMP levels?

a 25-year old man returns from a trip to the beach where he has been eating seafood "straight from the ocean" all week. within 12 hours of leaving the beach he develops vomiting and diarrhea that seems to pass, then he notices development of blister like lesions on his extremities. what is the likely causative agent?

which is more likely to have human-to-human spread?

salmonella enterica Typhi

a 5 year old boy has acute abdominal pain and cramps after eating at a charity cookout. he experiences bloody diarrhea with presence of immune cells. the patient is nauseated but not vomiting and passes the stool easily. we suspect that he has been infected with:

which of the following has a toxin that targets vacuole formation?

BFP is required in certain E. coli for virulence. in particular, it is used for:

a patient with severe dehydration and rice water stool reports to the doctor. organisms from the stool are isolated and the causative organism has no capsule. the most likely causative agent is:

any of the O1 cholerae strains

how does shigella gain entry to a host to cause disease?

via Peyer's patch

Vibrio cholerae

is halotolerant, can grow in the absence of salt, produces ZOT

which of the following is a virulence factor that allows E. coli attachment?

BFP, P-pili, CFA

salmonella is more likely transferred to humans from turtles that are

smaller than 4cm

what is the leading cause of reported bacterial food poisoning?

true or false: acid peptone enriches for Vibrio cholerae

true or false: helicobacter pylori has saga and a T3SS required for virulence

watery diarrhea, no fever

watery diarrhea, fever

bloody diarrhea, no leukocytes

bloody diarrhea, leukocytes

if you isolated the toxin from a patient with ETEC, it would have ________

cAMP remodeling activity

if you isolated the toxin from a patient with EIEC, it would have

hemolysin activity

which form of e coli forms actin pedestals in the small intestine?

which form of e coli forms actin pedestals in the large intestine?

which forms of e coli are located only in the large intestine?

which forms of e coli are located only in the small intestine?

which form of e coli is located in both the small intestine and the large intestine?

which of the following grows in the vacuole of a host cell?

salmonella enterica Typhi

helicobacter pylori

is found in the gastric epithelial cells but does not invade

which of the following can cause a condition that mimics appendicitis?

y. enterolitica

true or false: the A-B toxin of Campylobacter coli causes cAMP remodeling

a major virulence factor in E. coli causing UTIs is

vibrio parahemolyticus has

kangawa hemolysin

in shigella infections,

bacteria move from cell-to-cell via actin tails, toxins very similar to those in patients with EHEC are produced

true or false: helicobacter pylori has the potential to cause MALT tumors

vibrio cholerae has a toxin that is

an AB5 toxin, introduced by a phage

the genus salmonella

has only 2 recognized species, enters via M cells, has 2 large pathogenicity islands required for virulence

yersinia pestis capsule is made of

which of the following has been associated with Crohn's disease?

true or false: C. jejunii causes Guillian-Barre syndrome in 3/100 cases

true or false: salmonella has two different T3SS used for virulence

vibrio vulnificus

is oxidase positive, has 50% mortality when present in the bloodstream, is yellow on TCBS

true or false: H. pylori is protective for people with celiac disease

The CDT toxin from C. jejunii targets

virulence in Yersinia requires genes that are not in the chromosome. these genes include:

a protein called F1

which is more likely to have human-to-human spread?

yersinia pestis - pneumonic plague

a 12 year old female returns from camping in a national park. she presents complaining of rapid onset fever, cough without blood, body aches, and wheezing. she continues to be very weak and the doctor takes a sample of her sputum and plates it at 37C. each colony that forms is white but not mucoid in appearance. the most likely cause is

yersinia pestis - pneumonic plague

after returning from a trip to indonesia a man develops painless nodules on the shaft of his penis. these nodules appear to progress to a wound and the wound is non-suppurative. what is the most likely cause of this?

klebsiella granulomatis

a patient with severe dehydration and rice water stool reports to the doctor. organisms from the stool are isolated and the causative organism has a capsule. the most lily cause of this is

v. cholerae 0139

true or false: EHEC has BPF as a virulence factor

true or false: C. fetus is routinely transferred from humans to cats

a 5 year old boy with shigella sonnei develops thrombocytopenia. this means we can expect to find

shiga toxin, intracellular bacteria

which organism causes abnormal microvilli elongation?

what flavor of ice cream was linked to disease caused by typhoid mary?

true or false: M-protein can deplete parts of host innate immunity

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