Identify the correct statement regarding typhoid fever in human beings:
1. | It is caused by a pathogenic protozoan Salmonella typhi |
2. | The pathogen remains confined to the small intestine |
3. | Widal test can confirm the infection very early in the disease |
4. | Intestinal perforation and death may occur in severe cases |
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A common cause of pneumonia in humans is:
1. | Streptococcus pyogenes | 2. | Hemophilusinfluenzae |
3. | Staphylococcus aureus | 4. | Rotavirus |
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Rhinovirus does not affect:
1. | Lungs | 2. | Nose |
3. | Pharynx | 4. | Larynx |
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Malignant tertian malaria is caused by Plasmodium:
1. | vivax | 2. | ovale |
3. | falciparum | 4. | malariae |
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The mechanical carrier of the causative agent of amoebic dysentery is:
1. | A protozoan | 2. | House fly |
3. | Mosquito | 4. | Rodent |
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Aedes aegypti is not a vector for:
1. | Dengue | 2. | Chikungunya |
3. | Japanese encephalitis | 4. | Yellow fever |
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Which of the following is also sometimes called as mosquito fish?
1. | Bombay duck | 2. | Gambusia |
3. | Pacific salmon | 4. | Pomfret |
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What is incorrect regarding innate immunity?
1. | It is present at the time of birth |
2. | Physiological barriers prevent microbial growth |
3. | Natural killers, a cellular barrier, are a type of monocyte |
4. | It is a non-specific type of defense |
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Anamnestic response in acquired immunity is due to the fact that it is:
1. | characterized by memory | 2. | pathogen specific |
3. | huge in magnitude | 4. | due to lymphocytes |
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B cells:
1. | Do not produce antibodies but help T cells produce them |
2. | Are pathogen specific but do not retain the memory of previous encounters |
3. | Lack ability to distinguish between self and non-self |
4. | Are involved in humoral immune response |
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