Grinding of the teeth is also known as:

You respond to an outdoor gathering where a popular televangelist is holding a crusade. First-aid personnel at the gathering have reported that they have several people with upper respiratory problems. As you approach the first-aid tent, you notice several dead birds. This may indicate which of the following types of terrorist attack?

A) Biological B) Chemical C) Dirty bomb D) Conventional

Critically ill patients receiving invasive mechanical ventilation have been found to have which of the following microorganisms not typically present in healthy individuals?

a. Anaerobes b. Haemophilus species c. Gram-negative bacilli d. Viridans group of streptococci