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Streptococcus

1.

Which of the following cross-reacts with cell wall carbohydrate of Streptococcus pyogenes?

Answer: A

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2.

Which of the following microorganism causes lesions in the form of abscesses?

Answer: A

Staphylococcus aureus causes localized infections in which the characteristic lesion is a walled-off fort called the abscess— a cavity filled with pus cells (neutrophils), dead tissue, and bacteria

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Answer: D

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4.

Which of the following test indicates the susceptibility to streptococcal pyrogenic exotoxin?

Answer: B

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5.

What are the different infections caused by Group A Streptococcus spp

Answer: A

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6.

Which of the following is NOT the virulent factor, an important antigenic property of S. pyogenes?

Answer: A

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7.

Scarlet fever is similar to the pharyngitis in all respects.

Answer: B

Scarlet fever is similar to the pharyngitis except for the skin rash that appears because of the erythrogenic toxin.

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8.

Puerperal fever is a streptococcal infection of the _____________

Answer: C

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9.

The possible pathogen for the above disease condition is..................

Answer: B

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10.

Which of the following immunity is protective against infection by S.pyogenes?

Answer: A

The only type of immunity that is protective against infection by S. pyogenes is humoral immunity: antibodies against M proteins act as opsonins, enhancing phagocytosis of the streptococci.

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