<prompt> How many pairs of flagella does Giardia lamblia possess -OneTwoThreeFour  <response>: Ans. is d i.e., Four Giardia reviewo Giardia is a flagellate protozoao It is the only common protozoa that inhabits the duodenum and jejunum upper small intestine of human.o Infective form - cysto Mode of transmission - Ingestion of cysto Giardia exists in two forms 