24 Questions
Which virulence factor is associated with Proteus, Morganella, and Providencia?
Fimbriae
Which bacterial species is responsible for acute gastroenteritis and food poisoning?
Proteus
Which bacterial genus appears as metallic colonies with a black ring in Bismuth sulfite agar?
Yersinia
Which bacterial species produces a red pigment called prodigiosin?
Serratia
Which bacterial genus is characterized by being non-motile and H2S negative?
Shigella
Which bacterial group is associated with a carrier state where organisms are harbored in the gallbladder?
Proteus, Morganella, and Providencia
Which of the following characteristics is NOT true about Enterobacteriaceae?
Oxidase Positive (Except Plesiomonas shigelloides)
Which of the following Enterobacteriaceae members is NOT motile at body temperature?
Klebsiella
What is the most common disease syndrome caused by Uropathogenic E.coli?
Urinary Tract Infection (UTI)
What is the virulence factor of Enterotoxigenic E.coli (ETEC) for attachment to cells of the small bowel?
Pili
Which disease is commonly associated with Enterohemorrhagic E.coli (EHEC)?
Dysentery and Bloody stools
What characteristic test is positive for Uropathogenic E.coli (UPEC)?
Sereny test (+)
Which virulence factor is associated with Enteropathogenic E.coli (EPEC)?
Fimbria
What disease is caused by Serotype O157:H7 strain of E.coli?
Hemorrhagic colitis
Which type of E.coli is associated with UTI and diarrheal disease?
Diffusely adherent E.coli (DAEC)
What characteristic is common to Klebsiella and Enterobacter colonies?
Encapsulation
Which of the following is a primary intestinal pathogen?
Salmonella
What characteristic helps in the laboratory diagnosis of Proteus?
"Swarming motility"
What is the clinical manifestation associated with Shigella dysenteriae infection?
Bloody and mucoid stools
What is a characteristic feature of Yersinia pestis in laboratory diagnosis?
Cauliflower appearance at 48 hrs in SBA
Which of the following is a disease caused by Yersinia pseudotuberculosis?
Pseudotubercles
What is a typical characteristic of Plesiomonas shigelloides in laboratory diagnosis?
White to pink in inositol brilliant green bile salt agar
Which group is categorized as OPPORTUNISTIC pathogens among the given options?
Klebsiella
What is a key differentiating factor for Salmonella compared to the other bacteria mentioned?
Grows preferentially at 25°C to 30°C
This quiz covers the general characteristics of Enterobacteriaceae, including key features such as being Gram-negative bacilli/coccobacilli, MacConkey positive, and reducing nitrate to nitrite. It also includes information on opportunistic members like Escherichia coli, Klebsiella, and Enterobacter.
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