Question178:With reference to Bacteroides fragilis all of the following statements are true except ?
A) It is the most frequent anaerobe isolated from clinical samples
B) It is not uniformly sensitive to metronidazole
C) The lipopolysaccharide formed by B. fragilis is structurally and functionally different from the conventional endotoxin
D) Shock and disseminated intravascular coagulation are common in bacteremia due to B. fragilis
Ans:B
Question 179:Which of the following is the most common central nervous system parasitic infection ?
A) Echinococcosis
B) Paragonimiasis
C) Sparaganosis
D) Neurocysticercosis
Ans:D
Question 180:Which of the following hepatitis viruses is a DNA virus ?
A) Hepatitis C virus
B) Hepatitis B virus
C) Delta agent
D) Hepatitis E virus
Ans:B
Question 181:Which of the following conditions is associated with Coomb's positive hemolytic anaemia ?
A) Thrombotic thrombocytopenic purpura
B) Progessive systemic scleorsis
C) Systemic lupus erythematosus
D) Polyarteritis nodosa
Ans:C
Question 182:There has been an outbreak of food borne salmonella gastroenteritis in the community and the stool samples have been received in the laboratory. Which is the enrichment medium of choice ?
A) Cary Blair medium
B) V R medium
C) Selenite 'F' medium
D) Thioglycolate medium
Ans:C
Question 183:The virulence factors of Neisseria gonorrhoeae include all of the following except ?
A) Outer membrane proteins
B) Ig A Protease
C) M - Proteins
D) Pili
Ans:C
Question 184:The most common infectious agent associated with chronic pyelonephritis is ?
A) Proteus vulgaris
B) Klebsiella pneumoniae
C) Staphylococcus aureus
D) Escherichia coli
Ans:D
Question 185:Streptococcal Toxic Shock Syndrome is due to the following virulence factor ?
A) M protein
B) Pyrogenic exotoxin
C) Streptolysin O
D) Carbohydrate cell wall
Ans:B
Question 186:Reservoir of Indian Kala azar is ?
A) Man
B) Rodent
C) Canine
D) Equine
Ans:A
Question 187:For the field diagnosis of trachoma, the WHO recommends that follicular and intense trachoma inflammation should be assessed in ?
A) Women aged 15-45 years
B) Population of 10 - 28 year range
C) Children aged 0 - 10 years
D) Population above 25 years of age irrespective of sex
Ans:C
Question 188:All of the following statements are true regarding Q fever except ?
A) It is a zoonotic infection
B) Human disease is characterised by an interstitial pneumonia
C) No rash is seen
D) Weil-Felix reaction is very useful for diagnosis
Ans:D
Question 189:All of the following cephalosporins having good activity against Pseudomonas aeruginosa except ?
A) Cephadroxil
B) Cefepime
C) Cefoperazone
D) Ceftazidime
Ans:A
Question 190:A patient in an ICU is on a CVP line. His blood culture shows growth of gram positive cocci which are catalase positive and coagulase negative. The most likely etiological agent is ?
A) Staphylococcus aureus
B) Staphylococcus epidermidis
C) Streptococcus pyogenes
D) Enterococcus faecalis
Ans:B
Question 191:A 24 year old male presents to a STD clinic with a single, painless ulcer on external genitalia. The choice of laboratory test to look for the etiological agent would be ?
A) Scrappings from ulcer for culture on chocholate agar with antibiotic supplement
B) Serology for detection of specific IgM antibodies
C) Scrappings from ulcer for dark field microscopy
D) Scarppings from ulcer for tissue culture
Ans:C
Question 192:A 20 year old male had pain abdomen and mild fever followed by gastroenteritis. The stool examination showed presence of pus cells and RBCs on microscopy. The etiological agent responsible is most likely to be ?
A) Enteroinvasive E.coli
B) Enterotoxigenic E.coli
C) Enteropathogenic E.coli
D) Enteroaggregative E.coli
Ans:A
Question 193:
A 'Malignant pustule' is a term used for ?
A) An infected malignant melanoma
B) A carbuncle
C) A rapidly spreading rodent ulcer
D) Anthrax of the skin
Ans:D
A) It is the most frequent anaerobe isolated from clinical samples
B) It is not uniformly sensitive to metronidazole
C) The lipopolysaccharide formed by B. fragilis is structurally and functionally different from the conventional endotoxin
D) Shock and disseminated intravascular coagulation are common in bacteremia due to B. fragilis
Ans:B
Question 179:Which of the following is the most common central nervous system parasitic infection ?
A) Echinococcosis
B) Paragonimiasis
C) Sparaganosis
D) Neurocysticercosis
Ans:D
Question 180:Which of the following hepatitis viruses is a DNA virus ?
A) Hepatitis C virus
B) Hepatitis B virus
C) Delta agent
D) Hepatitis E virus
Ans:B
Question 181:Which of the following conditions is associated with Coomb's positive hemolytic anaemia ?
A) Thrombotic thrombocytopenic purpura
B) Progessive systemic scleorsis
C) Systemic lupus erythematosus
D) Polyarteritis nodosa
Ans:C
Question 182:There has been an outbreak of food borne salmonella gastroenteritis in the community and the stool samples have been received in the laboratory. Which is the enrichment medium of choice ?
A) Cary Blair medium
B) V R medium
C) Selenite 'F' medium
D) Thioglycolate medium
Ans:C
Question 183:The virulence factors of Neisseria gonorrhoeae include all of the following except ?
A) Outer membrane proteins
B) Ig A Protease
C) M - Proteins
D) Pili
Ans:C
Question 184:The most common infectious agent associated with chronic pyelonephritis is ?
A) Proteus vulgaris
B) Klebsiella pneumoniae
C) Staphylococcus aureus
D) Escherichia coli
Ans:D
Question 185:Streptococcal Toxic Shock Syndrome is due to the following virulence factor ?
A) M protein
B) Pyrogenic exotoxin
C) Streptolysin O
D) Carbohydrate cell wall
Ans:B
Question 186:Reservoir of Indian Kala azar is ?
A) Man
B) Rodent
C) Canine
D) Equine
Ans:A
Question 187:For the field diagnosis of trachoma, the WHO recommends that follicular and intense trachoma inflammation should be assessed in ?
A) Women aged 15-45 years
B) Population of 10 - 28 year range
C) Children aged 0 - 10 years
D) Population above 25 years of age irrespective of sex
Ans:C
Question 188:All of the following statements are true regarding Q fever except ?
A) It is a zoonotic infection
B) Human disease is characterised by an interstitial pneumonia
C) No rash is seen
D) Weil-Felix reaction is very useful for diagnosis
Ans:D
Question 189:All of the following cephalosporins having good activity against Pseudomonas aeruginosa except ?
A) Cephadroxil
B) Cefepime
C) Cefoperazone
D) Ceftazidime
Ans:A
Question 190:A patient in an ICU is on a CVP line. His blood culture shows growth of gram positive cocci which are catalase positive and coagulase negative. The most likely etiological agent is ?
A) Staphylococcus aureus
B) Staphylococcus epidermidis
C) Streptococcus pyogenes
D) Enterococcus faecalis
Ans:B
Question 191:A 24 year old male presents to a STD clinic with a single, painless ulcer on external genitalia. The choice of laboratory test to look for the etiological agent would be ?
A) Scrappings from ulcer for culture on chocholate agar with antibiotic supplement
B) Serology for detection of specific IgM antibodies
C) Scrappings from ulcer for dark field microscopy
D) Scarppings from ulcer for tissue culture
Ans:C
Question 192:A 20 year old male had pain abdomen and mild fever followed by gastroenteritis. The stool examination showed presence of pus cells and RBCs on microscopy. The etiological agent responsible is most likely to be ?
A) Enteroinvasive E.coli
B) Enterotoxigenic E.coli
C) Enteropathogenic E.coli
D) Enteroaggregative E.coli
Ans:A
Question 193:
A 'Malignant pustule' is a term used for ?
A) An infected malignant melanoma
B) A carbuncle
C) A rapidly spreading rodent ulcer
D) Anthrax of the skin
Ans:D
