MICROBIOLOGY

Question 1

Which organism can be seen in Tuna poisoning?

Answer 1

Morganella morganii

Question 2

Which enzyme can be seen in Tuna Poisoning?

Answer 2

Histidine decarboxylase

Question 3

Which bacteria can grow at 4 C?

Answer 3

Listeria monocytogenes

Question 4

Neuroinvasion can be occurred by?

Answer 4

L. monocytogenes

Question 5

Emetic toxin produced in?

Answer 5

Food

Question 6

Enterotoxin produced in the?

Answer 6

Intestine

Question 7

Case might showing a rice was contaminated by?

Answer 7

B. cereus spores

Question 8

Diarrheal type illness is caused by?

Answer 8

1- Large molecular weight

2- Heat- labile

Question 9

Vomiting (emetic) type of illness is caused by?

Answer 9

1- Low molecular weight

2- Heat- stable peptide

Question 10

What is a bacteriocin?

Answer 10

It is used as the killer molecule in anti-s. aureus drones.

Question 11

what is the difference between antigen and superantigen?

Answer 11

Antigens are foreign substances (mostly proteins, polysaccharide) or altered self proteins that induces specific immune response. Superantigens are microbial peptides that can polyclonally activate large portion of T cells.

Question 12

Ratovirus

Answer 12

• Infect infants age 3-15 month
• 3-7 days
• fall and winter

Question 13

Norovirus

Answer 13

• In adult

Question 14

Adenovirus

Answer 14

• Affected children age 2 and younger

Question 15

Noroviruses

Answer 15

• Non- enveloped

- Single- stranded RNA Viruses

Question 16

Rotavirus

Answer 16

• very stable and may remain viable in the environment for weeks.
• Rotavirus A is MOST COMMON

Question 17

Rotavirus

Answer 17

• EM appearance of a wheel with radiating spikes
• Asymptomatic infections
• a major cause of nosomial infection