Yersinia. Not very important today, very very important in the past! Callum and Jame talk through the medically important Yersinia species, and how to treat them. Links: CDC page for treatment of plague: https://www.cdc.gov/plague/healthcare/clinicians.htmlUK HSA SMI 21: ID of Yersinia Specieshttps://www.gov.uk/government/publications/smi-id-21-identification-of-yersinia-species-from-faecesThe 'Jump' test for mesenteric adenitis Jame mentioned has a name (the J-up test), and it works! Sensitivity 87%, Specificity 70%. DOI: 10.1177/2333794X19884824