The condition refers to invasive disease caused by Cronobacter species, notably Cronobacter sakazakii, which are naturally occurring environmental bacteria capable of persisting in dry substrates [1]. These microorganisms can colonize food products and medical devices, leading to systemic invasion rather than localized gastrointestinal illness [1].
Disease overview
BacterialCronobacter invasive infection
克罗诺杆菌侵袭性感染
Evidence-backed informationEN 5/7 applicable sections · ZH 5/7 applicable sectionsUpdated Sep 3, 2026
Cronobacter infection is a rare but potentially fatal bacterial illness that predominantly affects newborns and young infants [1]. Caused by environmental organisms such as Cronobacter sakazakii, the condition typically arises from exposure to contaminated dry foods, particularly powdered infant formula, or associated feeding equipment [1]. Early clinical manifestations often include fever, feeding difficulties, and lethargy, which may rapidly progress to severe systemic complications [1]. Public health guidance emphasizes strict hygiene and proper formula preparation to mitigate transmission risks [1].
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Initial presentations in susceptible infants commonly feature fever, inadequate feeding, persistent crying, and marked lethargy, sometimes accompanied by seizures [1]. Progression frequently results in severe invasive syndromes, including bacteremia, meningitis, urinary tract infections, and wound infections [1]. Notably, neonates under two months of age exhibit the highest susceptibility to meningeal involvement [1].
The infection demonstrates a rare overall occurrence but carries a disproportionately high morbidity and mortality burden among newborns and very young infants [1]. Geographic and temporal data indicate that historical surveillance frameworks in the United States yielded incomplete incidence estimates prior to recent regulatory updates [1]. The pathogen is consistently identified in environmental reservoirs and commercial dry food matrices, establishing a clear setting-based distribution pattern [1].
Pathogenic exposure occurs through the ingestion or contact with contaminated dry food products, specifically powdered infant formula, as well as contaminated water, preparation surfaces, and feeding apparatuses such as breast pump components [1]. The organism's ability to survive in desiccated environments facilitates indirect transmission via improperly sanitized equipment or suboptimal reconstitution practices [1].
Mitigation strategies center on rigorous hand and environmental hygiene during formula preparation and storage [1]. Caregivers are advised to utilize safe preparation techniques, maintain appropriate storage conditions, and thoroughly clean and sanitize all feeding items and contact surfaces to eliminate environmental contamination [1].
- 1US Centers for Disease Control and Prevention. About Cronobacter Infection | Cronobacter Infection | CDC [Internet]. cited 3 Sept 2026.Available from: https://www.cdc.gov/cronobacter/about/index.html
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