Shigella + Salmonella

Question 1

special properties of salmonella ?/

Answer 1

non lactose fermenter
colourless in media

Question 2

enteric fever causing Salmonella ?/

Answer 2

S typhi & para typhi

Question 3

Food poisoning causing Salmonella ??

Answer 3

S typhi murium
s enteritidis
s dublin
s newport

Question 3

Pathogenesis of enteric fever ??

Answer 3

231

Question 4

Fever type in enteric fever ??

Answer 4

step ladder pattern type of remitent fever

Question 5

complications of enteric fever ?

Answer 5

intestinal perofration
GI bleeding

Question 6

which gas by Salmonella ??

Answer 6

H2S

Question 7

H2S media evidence ??

Answer 7

Black colony -= Hecton agar media

Question 8

Stool culture media ——- 2/3 rd week ?

Answer 8

• MacConkey agar media
  shigella S agar media
  Deoxycholate citrate agar media

Question 9

Blood culture media name ??

232

Answer 9

• liquid media on biphasic media
  lytic method
  automated BACTEC
  BHI broth

232 ——— 1st week

Question 10

Urine culture – 2/3/4 th week ??

Answer 10

M
DCA

Question 11

Serological test ??

Answer 11

Widal test
Agglutination test

233

Question 12

shigella species name ?/

Answer 12

dysenteriae
flexneri
boydii
sonnei

235

Question 13

Shigella VS Salmonella ??

Answer 13

shigella - no H2S
non-motile
donot produce gas on fermentation of glucose

237

Question 14

causes of dysentry ?/

Answer 14

shigella = bacillary D
Entamoeba histolytica = amorbic dysentry

236

Question 15

TSI agar media off shigella ?/

Answer 15

No gas
No H2S

Question 16

TSI full form ?/

Answer 16

triple sugar iron

Question 17

TSI compostion //

Answer 17

Lactose
glucose
sucrose
ferrous sulphate
phenol red

Question 18

Salmonella TSI ?/

Answer 18

Black - H2S

Question 19

TSI
butt & slant content ?/

Answer 19

B - Glucose
S - Lactose

Question 20

TSI butt and slant indication «

Answer 20

Fermentation - yellow
no fermentation - pink

Question 21

Transport media of S + S ??

Answer 21

Cary blair media

Question 22

TSI Agar media - indicator name ?/

Answer 22

Phenol red

Question 23

selective media for salmonella ??

Answer 23

tetrathionate broth
selenite F broth

Question 24

Selective media for S + S ??

Answer 24

DCA SS agar media XLD - xylose lysine deoxycholate

Question 25

urease - ??

Answer 25

S + S

Question 26

Widal test interpretation??

Answer 26

233

Question 27

All count of AB ??

Answer 27

TO=1:80 TH=1:80 AH=1:40 BH=1:40 | 233

Question 28

Types of AB in widal test ??

Answer 28

S typhi O atg - AB - TO H atg - AB - TH S paratyphi H atg - A-AH H atg - B-BH

Question 29

TO TH ++++

Answer 29

S typhi

Question 30

TO AH +++++++++=

Answer 30

S paratyphi A

Question 31

TO BH ++++++++++===

Answer 31

S paratyphi B

Question 32

only TH ++++

Answer 32

Anamnestic reaction

Question 33

TH BH AH +++++++==

Answer 33

Post TAB vaccination

Question 34

disease cause d by shigella ?

Answer 34

shigellosis enterocolitis

Question 35

only TO +++++++++++++++++++++++++++

Answer 35

recent infection

Question 36

bangla of dysentry ?/

Answer 36

amashoy

Question 37

when enteric fever and when thyphoid fever ?

Answer 37

In summary, enteric fever is the broader term that includes both typhoid and paratyphoid fever, while typhoid fever specifically refers to the disease caused by S. Typhi. Both conditions are acquired through ingestion of contaminated food or water and are more common in developing countries.

Question 38

why there is no AO / BO in widal test ?

Answer 38

🦠 **Why No AO/BO in Widal Test?** 🔍 **Widal test** detects antibodies (agglutinins) against *Salmonella typhi* & *paratyphi*. 1️⃣ **No "AO" (Anti-O) or "BO" (Anti-B) because**: - "O" & "H" antigens are specific to *Salmonella*, not ABO blood group antigens. - *O antigen* → **Somatic (LPS) antigen** → IgM (Acute phase). - *H antigen* → **Flagellar antigen** → IgG (Chronic/Carrier). 2️⃣ **Test Measures**: - **TO (O antigen) → *S. typhi*** - **TH (H antigen) → *S. typhi*** - **AH (H antigen) → *S. paratyphi A*** - **BH (H antigen) → *S. paratyphi B*** 💡 **ABO blood group antigens** ≠ *Salmonella* antigens → **No AO/BO in Widal** @usmlereviews

Question 39

4 fold rise in titer meaning ???

Answer 39

A **"4-fold rise in normal titer"** means that the antibody level in a patient’s serum has increased **four times** compared to a previous measurement, usually in response to infection or vaccination. ✅ **Example**: - **Initial titer**: 1:40 - **After infection/vaccination**: 1:160 (4× increase) 📌 **Clinical Use**: - Confirms recent or active infection (e.g., **rheumatic fever, typhoid, viral infections**). - Requires **paired sera** (acute & convalescent phase, 2-4 weeks apart). @usmlereviews