A first case of bacteremia and meningitis in a 5-week old child.

, previously known as , was initially isolated from powdered infant milk in 2010. It falls within the family (class: Enterobacterales). While was traditionally regarded as non-pathogenic, we now present a case of bacteraemia and meningitis in a 5-week-old child, successfully treated with cefotaxime. This case, in contrast to prior reports with potential contamination issues, is the first to offer compelling evidence of s pathogenicity in humans.