1.   The disease usually occurs as an acute infection of the throat.

2.   Unlike AIDS, vaccines are available to prevent acute infection and therefore the development of the carrier state.

3.   In contrast, an IgG and IgA response to this antigen has been reported in children with acute infection.

4.   Little is known of the fundamental aspects of the immunology of chronic infection versus acute infection in giardiasis.

5.   H pylori has been shown to produce a factor which inhibits parietal cells in vitro and hypochlorhydria may be a feature of the acute infection.