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8 October, 15:56

Which of the following mechanisms is used by gram-negative bacteria to cross the blood-brain barrier?

A) producing fimbriae

B) inducing endocytosis

C) producing toxins

D) inducing TNF

E) antigenic variation

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Answers (1)
  1. 8 October, 18:03
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    Which of the following mechanisms is used by gram-negative bacteria to cross the blood-brain barrier? D) Inducing TNF

    Explanation:

    The blood brain barrier is a barrier formed by brain microvascular endothelial cells, astrocytes and pericytes. Pathogens can cross this barrier by using different mechanisms. The Tumor Necrosis Factor (TNF) is the way gram-negative bacteria cross this mentioned blood-brain barrier.
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