__?__ causes many respiratory tract infections due to __?__ virulence capabilty.
pneumiaeCapsul formation
__?__ cause gastrointestinal infections by __?__.
Enterobactericiaeinjection of type III toxin (Mech. transfers virulent prot. from bact. cytoplasm directly into host cell via syringe like prot inducing cell uptake)
Examples of bacteria that infect the gastrointestinal tract include: __?__...