Task: Text Simplification
Input (English): giardia lamblia -lrb- synonymous with lamblia intestinalis and giardia duodenalis -rrb- is a flagellated protozoan parasite that colonises and reproduces in the small intestine , causing giardiasis.
Output (English): giardia lamblia is a flagellated protozoan parasite that colonizes and reproduces in the small intestine , causing giardiasis.