David Grimm—online news editor for Science—talks with Sarah Crespi about a long-term project monitoring raccoon latrines in California. What influence do these wild bathrooms have on the ecosystem?

Sarah also interviews Christian Jobin of the University of Florida in Gainesville about his Perspective on three papers linking the success of cancer immunotherapy with microbes in the gut—it turns out which bacteria live in a cancer patient’s intestines can predict their response to this cutting-edge cancer treatment.

Read the related papers:

Routy et al., Gut microbiome influences efficacy of PD-1–based immunotherapy against epithelial tumors, Science 2018

Gopalakrishnan et al., Gut microbiome modulates response to anti–PD-1 immunotherapy in melanoma patients, Science 2018

Matson et al., The commensal microbiome is associated with anti–PD-1 efficacy in metastatic melanoma patients, Science 2018 aan4236

Listen to previous podcasts.

[Image: cuatrok77/Flickr; Music: Jeffrey Cook]