Bacteria with potent exotoxin is________?

The structure in involved in bacterial attachment to cell surface is________?

Immunoglobin, Which is produced first by the fetus in response to infection________?

Certain viruses have been isolated in crytalline form and have been found to be________?

The virus which causes Aplastic anemia in chronic hemolytic disease is________?

Secretory piece of IgA is synthesized in________?