Salmonella & Shigella

Question 0

(1) Gram negative bacilli
(2) Most are non-motile
(3) Non-lactose fermenter
(4) Most produce H2S (slight production only)

Which is false about Salmonella?

Answer 0

(2) Most are non-motile

Motile dapat.

Question 1

Differentiate food infection from food intoxication.

Answer 1

Food infection - results from intake of live pathogens that continue to grow inside body
Food intoxication - is caused by intake of toxins formed by microorganism as they grow in the food prior to consumption

Question 2

A.Form acid in glucose but not in mannose
B.Usually survive freezing in water
C.Resistant to: Brilliant green, Sodium tetrathionate, Sodium deoxycholate

Which is false about Salmonella?

Answer 2

A.Form acid in glucose but not in mannose

Both glucose and mannose dapat

Question 3

In __ agar, Salmonella species grows green to blue green colonies with black centers.

Answer 3

Hektoen

Question 4

Basis of classification for Shigella species

Answer 4

“O” antigen and biochemical reactions

Question 5

Salmonella enteriditis can also infect animals. True or false?

Answer 5

True. In fact, animals ang primary host.

Question 6

Salmonella can only enter the body orally. True or false?

Answer 6

True

Question 7

Salmonella is only involved in food infection. True or false?

Answer 7

False. In typhoid fever, it can also induce gastroenteritis via its toxins. : Presence of toxins–> Secretion of water and electrolytes from cell –> diarrhea

Question 8

False about Salmonella cholerasius
(A)Oral infection, early invasion of bloodstream
(B)Focal lesions: lungs, bones, meninges
(C)with intestinal manifestations
(D) positiveblood cultures

Answer 8

C

Question 9

One of the symptoms of Enterocolitis is constipation. True or false?

Answer 9

False. Diarrhea dapat.

Question 10

(1) Blood - taken only once
(2) Bone marrow cultures
(3) Urine cultures - maybe (+) after second week
(4) Stool - taken repeatedly
(5) Duodenal drainage - (+), carriers

Which is false about the specimen obtained for Salmonella?

Answer 10

(1) bec blood must be taken repeatedly

Question 11

Selenite F, terathionate broth are media used for isolating Shigella. True or false?

Answer 11

False. Salmonella yan.

Question 12

In all Salmonella cases, the body only produces IgG for antibody defense. True or false?

Answer 12

False. IgM also. Kaya detected din ng Widal test and Typhidot. For Typhidot:
• IgM(+) only or IgM and IgG(+): acute typhoid due to S. typhi
• IgG(+) only: possibly persistent typhoid/ relapse/ re-infection/ convalescent / carrier/ past typhoid

Question 13

Primary bacterial cause of salmonellosis

Answer 13

Salmonella enteritidis

Question 14

Diarrhea in salmonellosis is caused by enterotoxin. T or F?

Answer 14

F. Exotoxin dapat

Question 15

In salmonellosis, drugs for gut motility may be freely used. True or false?

Answer 15

False. Contraindicated sila

Question 16

Shigella dysenteriae has produces potent enterotoxins that lead to cell death and necrosis of colonic epithelia. True or false?

Answer 16

False. Exotoxin dapat.

Question 17

Shiga toxin is ___
A. Cytotoxic
B. Enterotoxic
C. Both

Answer 17

A

Question 18

False about Shigella
A.Non-lactose fermenting, non-motile,
B.able to produce gas in glucose C.humans – only natural host
D.Acid-resistant – survive passage through stomach

Answer 18

B

Question 19

Flies can be vectors of Shigella, true or false?

Answer 19

True

Question 20

Severe shigellosis may develop into __

Answer 20

pseudomembranous colitis

Question 21

Two Best specimens to collect in diagnosing Shigella

Answer 21

Feces

Rectal swab

Question 22

Both mild and severe Shigellosis involve invasion of submucosa. T or F?

Answer 22

F. Severe lang