Enterobactericeae

Question 1

What is the optimum temperature for Enterobacterales

Answer 1

• 37 degrees

Question 2

What is the general morphological and biochemical characteristics for Enterobacterales

Answer 2

• gram negative, non spore forming rods
• facultative anaerobes
  -catalase positive
• oxidase negative
• Nitrate reductase positive

Question 3

What is the habitat for Enterobactericeae

Answer 3

• gastrointestinal tract of hosts including humans, animals and insects

Question 4

how is Enterobactericeae spread from the environment

Answer 4

• sewage, soil, water, plants, food

Question 5

What are the routes of infection for Enterobactericeae

Answer 5

• Oral, via wounds, urinary tract, respiratory tract

Question 6

What Taxonomy is Enterobactericeae

Answer 6

• Order

Question 7

What is Enterobactericeae most common genus

Answer 7

• Salmonella

Question 8

How many species does Salmonella have

Answer 8

• 2

Question 9

What is the general characteristics of Salmonella

Answer 9

• non lactose fermenter
• Indole test negative

Question 10

What are the two types of Salmonella

Answer 10

• Typhoidal and non typhoidal

Question 11

What is the difference between typhoidal and non typhoidal salmonella

Answer 11

• typhoidal salmonella is restricted to humans, it is spread mianly from person to person through the fecal oral route
• non typhoidal salmonella causes other illness typically acute diarrhea or gastroenteritis in humans and animals. it is usually spread through food but can be spread from person to person

Question 12

Apart from Salmonella what is another genus for Enterobactericeae?

Answer 12

• Escherichia

Question 13

What causes UTIs

Answer 13

• Uropathogenic E. coli (UPEC)

Question 14

What percentage of women gets a UTI in their lifetime

Answer 14

• 50%

Question 15

Why is UTI infections more common in women then men

Answer 15

• Shorter urethra

Question 16

what does MNEC stand for

Answer 16

• Meningitis associated E. coli

Question 17

What is the major cause of CNS infections in infants < 1 month old

Answer 17

• Meningitis associated E. coli

Question 18

80% of E. coli stains involves what synthesis

Answer 18

• K-1 capsular antigens

Question 19

K-1 strands are common where?

Answer 19

• GI tract of pregnant women and new borns

Question 20

What is a common cause of gastrointestinal infection

Answer 20

• Intestinal pathogenic E. coli

Question 21

How is Intestinal pathogenic E. coli transmitted

Answer 21

• by infected food and water (or via person to person)

Question 22

Apart from Salmonella and Escherichia what is another genus of Enterobacteriaceae

Answer 22

• Shigella

Question 23

What are the four species of shigella

Answer 23

• S. dysenteriae (most severe
• S. flexneri (most frequent )
• S. boydii
• S. sonnei

Question 24

What is the treatment for Shigella spp.?

Answer 24

• increasingly resistant to antibiotics
• Recommended first line treatment for shigellosis is fluoroquinolones such as ciprofloxacin

Question 25

How is Shigella transmitted

Answer 25

• human only pathogen and is transmitted by faecal oral route and person to person spread