Staphylococcal Exfoliative Toxin (Exfoliatin A) Reacts in the Human Body

question 34

Multiple Choice

Staphylococcal exfoliative toxin (exfoliatin A) reacts in the human body as a superantigen. Intoxication with this means:

• A) polyclonal T-cell stimulation by overriding the normal route of antigen presentation
• B) monoclonal B-cell stimulation without T-cell signaling
• C) direct overactivation of T_H1 cells, causing a T_C cell response only
• D) dramatic down-regulation in genes that control all cells producing pro-inflammatory cytokines
• E) decreased antigen presentation by the antigen-presenting cells, followed by autoantibody formation

---

Definitions:

CSV File

A Comma-Separated Values file, which stores tabular data (numbers and text) in plain text form, making it simple to import and export between programs.

XML File

A text file format that uses tags to define objects and object attributes; extensively used in data serialization and web services.

Extensible Markup Language

A flexible way to create common information formats and share both the format and the data on the World Wide Web, intranets, and elsewhere.

Chart Wizard

A helpful tool in spreadsheet and database programs that guides users through the steps to create charts.