Cronobacter invasive infection

Cronobacter invasive infection refers to disease caused by Cronobacter species, environmental bacteria that naturally occur in surroundings and can survive in dry foods such as powdered infant formula and on contaminated feeding equipment ^[1]. Infection is uncommon but can be life-threatening in infants, particularly those under two months of age who are most susceptible to meningitis ^[1].

In affected infants, initial manifestations may include fever, poor feeding, excessive crying, markedly reduced energy, or seizures ^[1]. Severe illness can progress to bloodstream infection, meningitis, urinary tract infection, or wound infection, with meningitis posing risks of lasting neurological impairment ^[1].

Cronobacter infection is rare overall yet disproportionately severe in newborns and young infants ^[1]. Prior to 2024, limited reporting coverage constrained United States incidence estimates, after which invasive infant infection became a nationally notifiable condition ^[1].

Exposure occurs when powdered formula, water, feeding items, or preparation surfaces are contaminated with Cronobacter bacteria ^[1]. The organism has been isolated from dry infant formula and breast pump equipment, serving as potential vehicles for infant exposure ^[1].

Preventive measures emphasize safe preparation and storage of infant formula along with rigorous hand and surface hygiene ^[1]. Cleaning and sanitizing of feeding items, including breast pump equipment, are recommended to reduce contamination risk ^[1].

1. 1 US Centers for Disease Control and Prevention. About Cronobacter Infection | Cronobacter Infection | CDC [Internet]. cited 23 Oct 2026. Available from: https://www.cdc.gov/cronobacter/about/index.html