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WorksheetsSTG - E.coli & Nontyphoidal Samonella
Total questions: 10
Worksheet time: 5mins
What does the strain E. coli 0157 do to the body?
A. It harms the lungs
B. It harms the heart
C. It harms the intestines and in some cases the kidneys
D. It harms the eyes
1. Escherichia coli is one of the major enteric bacteria that causes diarrhea and is characterized according to its virulence properties. All are the types of E. coli, EXCEPT?
a) Enterohemorrhagic E. coli
b) Enteropathogenic E. coli
c) Enterotoxigenic E. coli
d) Enterolysogenic E. coli
Enteroinvasive E. coli (EIEC) are nonmotile, non-lactose, or late lactose fermenters which are predominantly found in developing countries infecting children and travelers. Which of the following infection is similar to EIEC infection?
a) Amoebic dysentery
b) Shigellosis
c) Traveler’s diarrhea
d) Enteric fever
Enterobacteriaceae expresses a variety of virulent antigens, all of the following are the antigens, EXCEPT?
K and Vi antigen
O antigen
D antigen
H antigen
3. Enterotoxigenic E. coli (ETEC) produces two major types of toxins, heat-labile (LT) and heat-stable (ST) toxins. LT or cholera-like toxin activates adenylate cyclase (cAMP) whereas ST activates.............causing Travelers’ diarrhea.
Guanylate cyclase
Fermentation of sugars
Decarboxylase reaction
Ribosomal dysfunction
3. S. enteritidis and S. typhimurium causes enterocolitis and gastroenteritis in humans. What is the most common food for the transmission of this infection?
Fruits and vegetables
Poultry and eggs
Canned beans
Yogurt
3. Which one is not the selective culture media for salmonellae and shigellae?
a) Deoxycholate citrate agar
b) Xylose-lysine decarboxylase agar
c) Salmonella –Shigella agar
d) Blood agar
9. Non typhoidal salmonellosis caused by
Preformed toxin ingestion
Live bacterial ingestion
Dead bacterial ingestion
None of the above
. All of the following statements regarding coliform bacteria is true, Except?
a) They are used as the indicator for the sanitation of the water
b) Consists of gram-negative, rods, non-spore-forming bacteria
c) Can survive in soil and plant vegetation
d) The acceptable number of coliform counts in drinking water is 1 or 0
3. The biochemical test used to identify and determine the ability of bacteria to convert tryptophan is?
a) Indole test
b) MRVP test
c) TSI test
d) Citrate test
