A farmer presenting with fever off-and on for the past 4 years was diagnosed to be suffering from chronic brucellosis. All of the following serological tests would be
A man, after skinning a dead animal, developed a pustule on his hand. A smear prepared from the lesion showed the presence of Gram positive bacilli in long
Toxins are implicated as the major pathogenetic mechanism in all of the following bacterial diarrhoeas except? A. Vibrio cholerae B. Shigella sp. C. Vibrio parahaemolyticus D. Staphylococcus aureus
A microbiologist wants to develop a vaccine for prevention of attachment of diarrhoeagenic E. coli to the specific receptors in the gastro-intestinal tract. All of the following fimbrial
Which of the following toxins acts by inhibiting protein synthesis A. Cholera toxin B. Shiga toxin C. Pertussis toxin D. LT of enterotoxigenic E.coli Correct answer : B.
A 20 year old man presented with hemorrhagic colitis. The stool sample grew Escherichia coli in pure culture. The following serotype of E.coli is likely to be the
Which of the following statements is true about hapten? A. It induces brisk immune response B. It needs carrier to induce immune response C. It is a T-independent
The blood in the vessels normally does not clot because: A. Vitamin K antagonists are present in plasma B. Thrombin has a positive feedback on plasminogen C. Sodium
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