{Reference Type}: Case Reports {Title}: Relapsed Mpox Keratitis, St. Louis, Missouri, USA. {Author}: Pi C;Adah O;Cholli PA;Martines R;Abate G;Hainaut L;Seipel E;Isbell TS;Frankel R;Poowanawittayakom N; {Journal}: Emerg Infect Dis {Volume}: 30 {Issue}: 7 {Year}: 2024 Jul {Factor}: 16.126 {DOI}: 10.3201/eid3007.240388 {Abstract}: We describe a case of a 46-year-old man in Missouri, USA, with newly diagnosed advanced HIV and PCR-confirmed mpox keratitis. The keratitis initially resolved after intravenous tecovirimat and penicillin for suspected ocular syphilis coinfection. Despite a confirmatory negative PCR, he developed relapsed, ipsilateral PCR-positive keratitis and severe ocular mpox requiring corneal transplant.