How is phase variation often accomplished at the genetic level?

Which is well known for causing acute bacterial meningitis in young adults?

Which form of plague spreads most easily among humans?

Which is a common treatment for Plasmodium infection?

Which of the following types of organisms are eukaryotic, form spores, produce exoenzymes to digest nutrients, and have cell walls composed of chitin or glucan?

Which fungus would most likely be encountered in a cave or abandoned building?

Which of the following can cause many diverse diseases including impetigo, toxic shock syndrome, necrotizing fasciitis, and food poisoning?

Humans encounter Legionella pneumophila from which of the following sources:

Which will be encountered as mold form and change to yeast to survive inside alveolar macrophages?

What is a major threat to the health and well-being of Americans?