pgaiims-Fort-Worth-Star-Telegram

Q: Ovalbumin was injected into a rabbit. Which of the following classes of antibiotics are to be produced initially:

(a) IgG
(b) IgM
(c) IgE
(d) IgD.


                                                                                                   A: c. IgE

Q: All the following about carbohydrate antigens are true except:

(a) Good memory response.
(b) Poor immunogenicity.
(c) T-cell independent immunity.
(d) Polyclonal response.



                                                                                                   A: a. Good....

Q: Which of the following cell types are the most potent activators of naive T cells:

(a) B cells
(b) Follicular dendritic cells
(c) Mature dendritic cells.
(d) Macrophages.



                                                                                                   A: c. Mature.....

Q: Which of the following complement component is the common link in the classical and alternate pathway of the complement system :

(a) C1
(b) C2
(c) C3
(d) C4


                                                                                                   A: c. C3

Q: Visceral larva migrans is associated with:

(a) Strongyloids stercoralis.
(b) Ancylostoma braziliensis.
(c) Toxocara canis.
(d) Visceral leishmaniasis.



                                                                                                   A: c. Toxocara...

Q: A patient presents to the emergency department with history of persistent fever and cough. Radiological features are suggestive of pneumonia. Sputum examination reveals aerobic branching gram positive filaments, that are partially acid fast. Which of the following is the most likely etiological agent:

(a) Actinomyces israeli
(b) Nocardia asteroides.
(c) Aspergillus fumigatus.
(d) Staphylococcus aureus.


                                                                                                   A: b. Nocardia...

Q: Aflatoxins are produced by:

(a) Aspergillus flavus
(b) Aspergillus niger
(c) Aspergillus fumigatus
(d) Candida.



                                                                                                   A: a. Asp. flavus

Q: Which of the following is the most common fungal infection in immunocompetent patient:

(a) Candida
(b) Aspergillus
(c) Cryptococcus
(d) Penicillium.


                                                                                                   A: a. Candida

Q: All of the following are true about Parvovirus B-19, except:

(a) < 10% spread by transplacental route.
(b) Respiratory route is the primary mode of transmission.
(c) It is a DNA virus.
(d) Affects erythroid progenitors.



                                                                                                   A: a. < 10%....

Q: Which of the following is not true regarding Chlamydia trachomatis:

(a) Elementary body is metabolically active.
(b) It is biphasic.
(c) Reticulate body divides by binary fission.
(d) Inside the cell, it evades phagolysosome.



                                                                                                   A: a. Elementary....

Q: A female presents with symptoms and signs suggestive of meningitis. MRI scan reveals a ring enhancing lesion in the frontotemporal region, while CSF shows gram positive bacilli. Other findings are minimally abnormal. Which of the following organism is the most likely etiological agent:

(a) Listeria monocytogenes.
(b) Hemophilus influenza
(c) Pneumococcus
(d) Staphylococcus aureus.



                                                                                                   A: a. Listeria...

Q: All the following statements about Clostridium tetani are true, except:

(a) Spores are resistant to heat.
(b) Primary immunization consists of three doses.
(c) Incubation period is 6- 10 days.
(d) Person to person transmission does not occur.



                                                                                                   A: a. Spores....

Q: A farmer presents to the emergency department with painful inguinal lymphadenopathy and history of fever and flu like symptoms. Clinical examination reveals an ulcer in the leg. Which of the following stains should be used to detect suspected bipolar-stained organisms:

(a)Albert's stain
(b) Wayson's stain
(c) Ziehl Neelson stain.
(d) Mc Fayden's stian.


                                                                                                   A: b. Wayson's stain.

Q: Which of the following statements about campylobacter jejuni is false:

(a) Commonest agent responsible for campylobacteriosis.
(b) Poultry is a common source of infection.
(c) Humans are important reservoirs of infection.
(d) Associated with Guillain Barre syndrome.



                                                                                                   A: c. Humans...

Q: Which of the following statements about C. diphtheria is false:

(a) Toxin production is mediated by native chromosome.
(b) Organism maybe identified by tests for toxigenicity.
(c) Toxin acts by inhibiting protein synthesis.
(d) Toxin may affect heart and nerves.



                                                                                                   A: a. Toxin prodn...

Q: All the following are true about methicillin resistance in MRSA, except:

(a) Resistance is produced as a result of altered PBP's.
(b) Resistance maybe produced by hyperproduction of beta lactamase.
(c) Resistance is primarily mediated/transmitted by plasmids.
(d) Resistance maybe missed at incubation temp of 37 deg. C .



                                                                                                   A: c. Resistance is..

Q: C in C reactive protein stands for:

(a) Capsular polysaccharide in Pneumococcus.
(b) Concanavalin-a
(c) Calretinin
(d) Cellular.



                                                                                                   A: a. Capsular...

Q: All of the following agents have polysaccharide capsule related antigen-antibody responses, except:

(a) Pneumococcus
(b) Meningococus
(c) Hemophilus influenza
(d) Bordetella pertussis.


                                                                                                   A: Bordetella...l

Q: An eight year old child with history of pain and discharge from right ear presents with fever, neck rigidity and positive Kernig's sign. Discharge was stained with gram stain, which revealed gram positive cocci. Which of the following is the most likely organism:

(a) H. influenzae
(b) Staphylococcus
(c) Pneumococcus
(d) Pseudomonas.


                                                                                                   A: c. Pneumococcus

Q: Which of the following statements about Pneumococcus is false:

(a) Capsule aids in virulence.
(b) Commonest cause of otitis media.
(c) Causes mild form of meningitis.
(d) Respiratory tract of carriers is most important source of infection.



                                                                                                   A: c. Causes....