Inclusion Criteria:  Premature infants inferior to 29 weeks of gestation screened for fungal colonization, Admitted in the neonatal department of Centre Hospitalier Sud Francilien, Between January 1st 2018 and December 31st 2020, Holders of parental authority informed of the study that are unopposed  Exclusion Criteria:  Premature infants over 29 weeks of gestation, or term infants, Premature infants less than 29 weeks of gestation not screened for fungal colonization during their hospitalization, Premature infants with significant congenital malformations or genetic abnormalities, Premature infants inferior to 29 weeks of gestation deceased in delivery room.