Quizes Flashcards
Clostridium perfringes, under ideal growth conditions, can have a generation time as short as?
7 minutes
What food borne illness is most commonly associated with improperly home canned vegetables?
Clostridium botulinum
Which of the following foodborne pathogens causes illness as a result of infection?
a. Bacillus cereus emetic type
b. Clostridium botulinum
c. Clostridium perfringens
d. Staphylococcus aureus
Clostridium perfringens
Toxin produced by which of the following is heat and trypsin stable?
a. Clostridium perfringens
b. Bacillus cereus emetic type
c. Bacillus cereus diarrheal type
d. Clostridium botulinum Type E
b. Bacillus cereus emetic type
The protein toxin crystal of B. thuringiensis is toxic to?
insects
This type of B. cereus gastroenteritis is very “Clostridium perfringens”like.
diarrheal type
What food product formerly(and somewhat still) had a close association with the emetic type of B. cereus gastroenteritis?
fried rice
Clostridium prefringens was formerly known as:
Clostridium welchii
What is the primary symptom of Clostridium perfringens?
diarrhea
Of Clostridium botulinum, Staphylococcus aureus, Bacillus cereus, Clostridium perfringens, and Vibrio spp., which causes the greatest number of estimated annual food borne illness in the US?
Clostridium perfringens
Ultimately, victims o C. botulinium food borne illness die from:
suffocation
One kilogram of C. bot toxin would be sufficient to kill what maximum number of people?
the population of the world
The heavy chain of C. bot toxin has what function?
binds to nerve cell
This uneviscerated, ethnic food product has been responsible for numerous cases of botulism in the US and world-wide.
Kapchunka
Infant botulism is caused by:
infants consuming bot spores
Infant botulism is treated by administrating?
botulism immune globulin
Bacillus thuringiensis is differentiated from B. cereus by what specific feature?
production of a parasporal crystal
Clostridium botulinum was discovered by?
Emile van Ermengem
In 1895, individuals from what common group were the first to be “diagnosed” with illness from Clostridium botulinium?
musicians
Of the 7 types of C. bot, how many of the types produce illness in humans?
4
Which of the 7 types of C. bot is the most deadly to humans?
Type A
Which of the following proteolytic types of C. botulinum is psychrotrophic?
a. Type A
b. Type B
c. Type C
d. Type D
e. none of them
e. none of them
What is unique about food borne illness caused by C. botulinum?
it is neurotoxigenic
The first documented outbreak of listeriosis was associated with what food?
cole slaw
Which food borne pathogenic species of Shigella causes the most severe illness?
S. dysenteriae
Victims of foodborne illness from Shigella, as well as some other food borne bacteria, who manifest human leukocyte antigen, B27, are predisposed to what sequela?
reactive arthritis
16% of foodborne disease outbreaks on cruise ships are caused by this pathogen.
Shigella
Infection from E. coli O157:H7 has been historically, primarily most commonly associated with consumption of what food?
ground beef
This sequela to STEC infections can result in renal failure.
HUS
Enterotoxigenic E. coli causes watery diarrhea and is sometimes nicknamed:
Montezuma’s Revenge
Thrombotic thrombocytopenic purpura is a sequela of STEC infection that primarily affects:
the elderly
This food borne pathogen is an intracellular parasite
Listeria monoctyogenes
Six year old Lauren Rodolph died after eating fast food contaminated with what food borne pathogen?
E. coli O157:H7
In the human intestinal tract, Listeria moncytogenes moves from cell to cell by means of:
actin propulsion
Intimin is a product of:
eae gene of E. coli O157:H7
An increase in fluid in the intestinal limen, followed by watery diarrhea is cased by:
increased cyclic adenosine monophosphate in the intestinal villi
Which pathotype of E. coli does not produce a toxin and is invasive?
EIEC
EHEC is MUG-negative because it
does not produce B-glucuronidase
The ability of E. coli O157:H7 shiva-toxin targets kidney cells because of
the presence of Gb3 receptors
Stx represents:
Shiga toxin
Hemolytic activity of L. monoctyogenes can be enhanced by what?
Christie, Atkins, Munch-Peterson test
A multi-state outbreak of listeriosis in 2011 was associated with what from a single farm from Colorado?
cantaloupe
What organism is used in the CAMP test to enhance hemolysis of weekly hemolytic organisms?
Staphylococcus aureus
E. coli was discovered by:
Theodor Escherich
For stereotyping enterofhemorrhagic E. coli, NM represents?
non motile
The normal habitat for E. coli O157:H7 is:
GI tract of mammals
“Traveler’s diarrhea” is caused by:
enterotoxigenic E. coli
How many species of Salmonella are recognized?
2
This server of Salmonella is recognized as the most heat resistant.
Senftenberg
This milk-borne outbreak of salmonellaosis in the Chicago area resulted in over 16000 confirmed cases was attributed to what?
a faulty flow diversion valve
A 1989 outbreak of salmonellosis associated with cantaloupe from Mexico resulted from contaminated melons from:
hauling melons in a truck previously used to haul pigs
Concerns about the ability of Salmonella to develop increased heat resistance developed from several recent salmonellosis outbreaks associated with what low moisture food?
peanut butter
Symptoms of infection with this food borne pathogen include pseudo-appendicities, which has resulted in numerous, unnecessary appendectomies.
Yersinia enterocolitica
In addition to reactive arthritis, infection from Campylobacter jejune can lead to this other, very serious sequel:
Guillain-Barre Syndrome
Bubonic plague is caused by infection from what pathogen?
Yersina pestis
Salmonella was discovered by whom?
Daniel Salmon
The discoverer of Salmonella earned the first degree in what field award in the USA?
veterinary medicine
Which of the following food borne pathogens is a spore former?
a. Salmonella Typhimurium
b. Yersina enterocolitica
c. Campylobacter jejuni
d. Vibrio cholerae
e. none of the above
e. none of the above
This 2002 outbreak of yersiniosis in Chicago affected nine infants who either ate or were exposed to what?
chitterlings
This species of Vibrio actually causes more confirmed cases of illness in the US than the CDC estimates!
V. vulnifcus
In 2010, an epidemic of V. cholerae caused over 1/2 million estimated illnesses and at least 7000 deaths in what country?
Haiti
Illness caused by this organism, to date, has only affected infants.
Cronobacter sakazakii
This food borne pathogen is an obligate microaerophile, requiring 3-5% O, 2-10% CO2 for growth.
Campylobacter jejuni
The english physician in #10 above demonstrated the source of the cholera epidemic by doing what?
removing the handle from a water pump
THis English physician determined the cause of what is now known to have been an epidemic of cholera in the late 1800s.
John Snow
Camplyobacter jejuni is most commonly associated with what food?
chicken
This Gram negative food borne pathogen was originally called Vibrio fetus?
Campylobacter jejuni
This foodborne pathogen is not only salt tolerant, it requires 1% NaCl for growth.
Vibrio parahaemolyticus
This species of Vibrio causes food borne illness as well as necrotzing fascitis.
V. vulnifcus
What test uses freshly drawn human blood to determine virulence of strains of Vibrio paraemolyticus?
Kanagawa reaction
This biotype of Vibrio cholera is currently the most significant and has a significantly lower infectious dose.
El Tor
Infection with Vibrio cholera can cause profuse, watery diarrhea of up to 1L/hour, which is often referred to as:
rice water stool
