NURSING EXAM QUESTIONS
PATHOLOGY AND GENETICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Tobacco mosaic virus
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bacteriophage
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influenza
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None of the above
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Detailed explanation-1: -Influenza A viruses are found in many different animals, including ducks, chickens, pigs, whales, horses, seals and cats. Influenza B viruses circulate widely only among humans.
Detailed explanation-2: -Depending on the origin host, influenza A viruses can be classified as avian influenza, swine influenza, or other types of animal influenza viruses. Examples include avian influenza “bird flu” virus subtypes A(H5N1) and A(H9N2) or swine influenza “swine flu” virus subtypes A(H1N1) and A(H3N2).
Detailed explanation-3: -Currently circulating in humans are subtype A(H1N1) and A(H3N2) influenza viruses. The A(H1N1) is also written as A(H1N1)pdm09 as it caused the pandemic in 2009 and subsequently replaced the seasonal influenza A(H1N1) virus which had circulated prior to 2009.