1. A patient has been diagnosed in neurology ward as suffering from gullianbarre disease. On history he told that he had episodes of dysentery in past. Which one of the following organisms can be responsible for this condition of the patient now

a. E.coli

b. Shigella

c. Salmonella

d. Campylobacter

e. V. cholera

2. In newspaper you read about an epidemic in which large number of people has been suffering from watery diarrhea. The microorganism that was found responsible for this condition is a comma shaped gram negative rod. Which one of the following characters differentiates this organism from enterotoxigenicE.coli that also causes a similar type of diarrhea

a. It is oxidase positive

b. It is gram negative

c. It is catalase positive

d. It is coagulase positive

e. It is anaerobe

3. In a medical ward a patient is suspected of being suffering from Typhoid fever. In the 1stwk of this fever , which one of the following tests can best diagnose this disease

a. Widal test

b. Typhi dot test

c. Blood culture

d. Stool culture

e. Urine culture

4. A 14 yrs old boy landed in emergency with C/O bloody diarrhea with blood and mucus. His condition was diagnosed as bacillary dysentery caused by shigelladysenteriae. The toxin ( shiga toxin ) of this bacteria acts by which of the following mechanism

a. It acts as superantigen

b. Interferes with 60s ribosomal subunit

c. ADP ribosylation of EF2

d. Blocks the release of GABA

e. Blocka the release of acetylcholine

5. A 25 yrs old young man is diagnosed as suffering from haemolytic uremic syndrome. He gave history of haemorragic colitis after eating hamburger. Which of the the following organisms can be responsible for this condition

a. Vibrio cholera

b. Shigellasonnei

c. Entero invasive E.coli

d. Entero toxigenic E.coli

e. E.coli O157:H7 strain

6. A 35 yrs old female visited a clinic with C/O fever and burning micturition. Her urine sample was sent to laboratory for culture. Culture report revealed the causative organism as a gram negative rod, non lactosefermenter that swarms on blood agar. The organism is

a. Pseudomonas

b. Proteus

c. E.coli

d. Staph. Saprophyticus

e. Ureaplasmaurealyticum

7. In laboratory, various biochemical reactions are done for the diagnosis of enterobacteriaceae. Which of the following TSI reactions are considered positive for E.coli

a. Acid slant, acid butt, no H2S, production of gas

b. Acid slant, acid butt, H2S, production of gas

c. Acid slant, alklaine butt, no H2S, no gas

d. Alkalineslant,acid butt, no H2S, production of gas

e. Alkaline slant , alkaline butt, no H2S, no gas

8. In surgical ward, greenish blue coloured pus is coming out from wounds of a patient. The organism responsible for this pus is a gram –ve rod, non lactose fermenter that is oxidase +ve. This organism is

a. Staph.aureus

b. Klebsiella

c. Pseudomonas

d. Proteus

e. Serratia

9. A 42 yrs old patient comes to a physician with C/O pain epigastrium. He advised him gastroscopy after which the patient was diagnosed as suffering from gastric ulcers. He was advised to take multiple drugs . Which of the following tests can be done to see  the response to treatment in this case.

a. Urea breath test

b. Gastric biopsy

c. ELISA

d. Stool antigen test

e. PCR

10. A 6 yrs old child was brought to paediatric emergency with c/o fever, sore throat and cervical adenopathy. On examination doctor observes a greyish coloured membrane over the tonsils and throat of child. Which of the followings are characters of the organism that is responsible for this condition

a. A gram +ve rod with metachromatic granules

b. A gram +rod with spores

c. A gram +ve rod with polypeptide capsule

d. A gram –ve rod that is capsulated

e. A gram –vecoccobacillus

11. A 22 yrs old young man came to dermatology outdoor with c/o various moist maculopapular rashes on his body. A sample from these lesions was taken and sent to laboratory for examination. Spiral shaped rods were observed on dark field microscopy. Which one of the following tests can also be done to confirm the diagnosis of this disease.

a. Widal test

b. Oxidase test 

c. Indole test 

d. FTA ABS test

e. Weil felix test