What are the first antibodies produced by a plasma cell?

The first antibodies produced by a plasma cell are typically IgM antibodies. These are generated in response to an initial infection or antigen exposure and play a crucial role in the early stages of the immune response. IgM antibodies are effective in forming complexes with antigens and activating complement, which helps in neutralizing pathogens. After the initial response, plasma cells may switch to producing other antibody classes, such as IgG.