Genetics of a canine transmissible tumour show how the world’s oldest cancer “metastasised” through the global dog population – and captured, maintained and rearranged its mitochondrial DNA along the way.

A transmissible cancer that arose in a marine mussel spread from a single animal to become a global pathogen affecting two other mussel species in both Europe and South America.

Genome sequencing analysis dissects the origins and evolution of cancer transmission between clam species in the Seas of Southern Europe.

A recently discovered contagious cancer in the Tasmanian devil has the potential to become widespread in the population due to the loss of histocompatibility antigens that are allogeneic to its hosts.

The discovery of a second facial tumor disease in the Tasmanian devil has provided insights into the emergence of contagious cancers.

Tumoral group phenotypic compositions and their relationships with the fitness of individual malignant cells in different ecological contexts represent crucial, previously unexplored dynamics in tumor progression.

Microbial populations are continuous along the gastrointestinal tract, with increased transmission in colorectal cancer and rheumatoid arthritis patients.

A population of pathogenic bacteria is found to respond to the loss of cooperation by privatising an essential function.

Oral bacteria colonize the gut more frequently than previously thought.

Populations of Mycobacterium tuberculosis associated with clustering and shorter terminal branches are not necessarily transmitting more.