Bumble bees are essential native and commercial pollinators, yet they face declining populations due to climate change, habitat loss, disease, and exposure to environmental toxins. Parasites, like Crithidia bombi, can negatively impact bumble bee health by altering foraging efficiency or reducing queen survival during their overwintering period. When combined with other stressors, like environmental toxicants, the detrimental effects of parasites like C. bombi may be even greater and lead to higher mortality rates. Cadmium is a widespread heavy metal toxicant that has been shown to increase mortality in bees and disrupt the bumble bee gut microbiome. Bees are often exposed to these simultaneous stressors in the wild, but little is known about the interactions between these stressors and how they may impact bee health. Here we grew isolated strains of C. bombi in varying concentrations to determine its effects on growth. Our results suggest that even moderate, field-realistic concentrations of cadmium can lower C. bombi growth rates. Several strains of gut bacteria have been shown to remove cadmium from growth media. Here we asked whether C. bombi could accumulate metal from the environment by growing four strains in cadmium spiked media. Preliminary data from this study suggests that most strains of C. bombi are unable to remove metal from their growth environment, with the exception of one. Taken together, these experiments suggest that C. bombi is susceptible to cadmium exposure. Understanding the dynamics between these two stressors can indicate how they might interact within a bumble bee host.