What is the symbiotic relationship does a mouse and a flea have?

The relationship between a mouse and a flea is primarily parasitic rather than symbiotic, as the flea feeds on the mouse's blood, benefiting itself while harming the mouse. The flea derives nourishment and a habitat from the mouse, allowing it to thrive and reproduce. In this interaction, the mouse experiences discomfort and potential health issues due to the flea's presence, highlighting the negative impact of this relationship. Thus, while the flea benefits, the mouse suffers, which is characteristic of parasitism rather than mutualism or commensalism.