2021

Question 1

which enteric bacterium is acquired as a zoonotic infection, often from undercooked chicken, and causes a mild, selfi-limiting gastroenteritis

Answer 1

campylobacter jejune

Question 2

hemolytic uremic syndrome is a complication of infection by which organism

Answer 2

escherichia coli O157:H7

Question 3

which enteric bacterium can invade M cells in the gut, survive in macrophages, and eventually infect many different organs in the body

Answer 3

salmonella enterica serovar typhi

Question 4

which pathogen resides in the stomach and induces the host to secrete urea through the mucosal epithelium

Answer 4

heliocobacter pylori

(and metabolizes urea to make local environment more basic, increase pH)

Question 5

which of the following viruelence factors is the dissaccharide-tetrapeptide component of bacterial peptidoglycan

Answer 5

tracheal cytotoxin of bordetella pertussi

(shed from bacterial cells instead of being absorbed and recycled)

Question 6

these gram positive rods established themselves in the throat and kill cells by expressing a tocin that ADP-ribosylates elongation

Answer 6

corynebacterium diphtheriae

Question 7

which of the following describes pesudomonas aeuriginosa

Answer 7

can grow at temperatures up to 43C

(depends on alginate production to produce biofilm)

Question 8

blockage of acetylcholine release from host cells is caused by a virulence factor of which bacterium

Answer 8

clostridium botulinism

Question 9

what spore forming bacterium produce A-B exotoxins that block GABA release from axon endings of interneurons that control motor neurons within muscles

Answer 9

clostridium tetani

Question 10

which bacterium is considered the keystone pathogen for periodontitis

Answer 10

porphyromonas gingivalis

Question 11

which bacterium is considered the keystone pathogen for periodontitis

Answer 11

porphyromonas gingivalis

Question 12

what haemophilus influenzae virulence factor allows strains of these bacteria to cause systemic infections

Answer 12

capsule b

Question 13

which of the following is true for leprosy

Answer 13

individuals normally clear the bacterial agent via cell-mediated immunity
(and strong TH1-response by infected individual results in a good prognosis for recovery)

Question 14

a zoonotic disease is associated with which of the following bacteria

Answer 14

borrelia burgdoferi

rash- early
arthritis-late

Question 15

what is a symptom of late stage, chronic disease associate with borrelia burgdoferi

Answer 15

arthritis

Question 16

which organism is an obligate intracellular pathogen

Answer 16

chlamydia trachomatis

(and rickettsia)

Question 17

what is true about Mycoplasma pneumoniae

Answer 17

cells pass through filter that traps most other bacteria

Question 18

what is uniquely associated with congenital syphilis

Answer 18

hutchinson’s incisors

Question 19

a pregenant 22 year old women was seen at urgent care and had fever, malaise headache and macular rash over body. and ulcer on vagina that went away
diagnosis made?

Answer 19

she has secondary syphilis

Question 20

which bacteria are initial colonizers of the dental biofilm, binding to the salivary pellicle

Answer 20

streptococcus gordonii

Question 21

which oral bacteria are strongly associated with acute necrotizing ulceratize gingivitis

Answer 21

spirochetes plus fusobacterium nucleatum

Question 22

which genus of bacteria are typically associated with salivary gland infections

Answer 22

staphylococcus

Question 23

which of the following is characterisitic of periodontal abscesses

Answer 23

infection contains multiple anaerobic species

Question 24

what virus is responsible for about 30% of cases of the common cold, has an RNA genome that can be directly translated into protein, but also requires a second phase of translation to produce several smaller mRNAs transcribed from a negative sense copy of RNA genome

Answer 24

coronavirus

Question 25

nonpolio enteroviruses such as EV-D68 are associated with increased cases of what disease as a possible emerging epidemic

Answer 25

acute flaccid myelitis

Question 26

what virus has an RNA genome that can be directly translated into protein, and transcribed more mRNAs, all of which are the size of the fill genome, from a negative sense copy of the viral RNA genome

Answer 26

rhinovirus

Question 27

which virus genome is directly translated into proteins upon entry into a cell

Answer 27

poliovirus

Question 28

what are Koplik;s spots

Answer 28

lesions of the oral cavity associated with measles

Question 29

members of what minus-stranded RNA virus family are characterized by a helical nucleocapsid and their ability to induce syncytia during infection?

Answer 29

paramycoviruses